Hello,
syzbot found the following issue on:
HEAD commit: 449dc8c9 Merge tag 'for-v5.9' of git://git.kernel.org/pub/..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15d816c2900000
kernel config: https://syzkaller.appspot.com/x/.config?x=4810fa4a53b3aa2c
dashboard link: https://syzkaller.appspot.com/bug?extid=3ad9614a12f80994c32e
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=153d30e2900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]
2020/08/09 00:29:47 executed programs: 3
BUG: memory leak
unreferenced object 0xffff88811310ea80 (size 96):
comm "syz-executor.0", pid 6688, jiffies 4294954707 (age 12.810s)
hex dump (first 32 bytes):
01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 30 e0 00 00 c9 ff ff .........0......
backtrace:
[<0000000073bb6e7d>] kmalloc include/linux/slab.h:554 [inline]
[<0000000073bb6e7d>] kzalloc include/linux/slab.h:666 [inline]
[<0000000073bb6e7d>] seccomp_prepare_filter kernel/seccomp.c:562 [inline]
[<0000000073bb6e7d>] seccomp_prepare_user_filter kernel/seccomp.c:604 [inline]
[<0000000073bb6e7d>] seccomp_set_mode_filter kernel/seccomp.c:1535 [inline]
[<0000000073bb6e7d>] do_seccomp+0x2ec/0xd40 kernel/seccomp.c:1649
[<00000000658618a4>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000b8258e4d>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffffc90000e03000 (size 4096):
comm "syz-executor.0", pid 6688, jiffies 4294954707 (age 12.810s)
hex dump (first 32 bytes):
01 00 03 00 00 00 00 00 00 00 00 00 05 00 00 00 ................
2d 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -...............
backtrace:
[<000000003b6a39af>] __vmalloc_node_range+0x2e1/0x3c0 mm/vmalloc.c:2520
[<00000000eee59e12>] __vmalloc_node mm/vmalloc.c:2552 [inline]
[<00000000eee59e12>] __vmalloc+0x49/0x50 mm/vmalloc.c:2566
[<000000006e13ac2a>] bpf_prog_alloc_no_stats+0x32/0x100 kernel/bpf/core.c:85
[<00000000cff3572c>] bpf_prog_alloc+0x1c/0xb0 kernel/bpf/core.c:111
[<000000003222ffa9>] bpf_prog_create_from_user+0x5f/0x2a0 net/core/filter.c:1409
[<00000000baa576ae>] seccomp_prepare_filter kernel/seccomp.c:567 [inline]
[<00000000baa576ae>] seccomp_prepare_user_filter kernel/seccomp.c:604 [inline]
[<00000000baa576ae>] seccomp_set_mode_filter kernel/seccomp.c:1535 [inline]
[<00000000baa576ae>] do_seccomp+0x32e/0xd40 kernel/seccomp.c:1649
[<00000000658618a4>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000b8258e4d>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff888113bc1c00 (size 1024):
comm "syz-executor.0", pid 6688, jiffies 4294954707 (age 12.810s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<000000000466b245>] kmalloc include/linux/slab.h:554 [inline]
[<000000000466b245>] kzalloc include/linux/slab.h:666 [inline]
[<000000000466b245>] bpf_prog_alloc_no_stats+0x73/0x100 kernel/bpf/core.c:89
[<00000000cff3572c>] bpf_prog_alloc+0x1c/0xb0 kernel/bpf/core.c:111
[<000000003222ffa9>] bpf_prog_create_from_user+0x5f/0x2a0 net/core/filter.c:1409
[<00000000baa576ae>] seccomp_prepare_filter kernel/seccomp.c:567 [inline]
[<00000000baa576ae>] seccomp_prepare_user_filter kernel/seccomp.c:604 [inline]
[<00000000baa576ae>] seccomp_set_mode_filter kernel/seccomp.c:1535 [inline]
[<00000000baa576ae>] do_seccomp+0x32e/0xd40 kernel/seccomp.c:1649
[<00000000658618a4>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000b8258e4d>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881154cb860 (size 32):
comm "syz-executor.0", pid 6688, jiffies 4294954707 (age 12.810s)
hex dump (first 32 bytes):
01 00 73 74 65 6d 64 2d 00 5c d6 19 81 88 ff ff ..stemd-.\......
65 72 76 69 63 65 00 00 00 00 00 00 00 00 00 00 ervice..........
backtrace:
[<00000000561d65d4>] kmalloc include/linux/slab.h:554 [inline]
[<00000000561d65d4>] bpf_prog_store_orig_filter+0x33/0xa0 net/core/filter.c:1131
[<000000005d9b7cd2>] bpf_prog_create_from_user+0xda/0x2a0 net/core/filter.c:1422
[<00000000baa576ae>] seccomp_prepare_filter kernel/seccomp.c:567 [inline]
[<00000000baa576ae>] seccomp_prepare_user_filter kernel/seccomp.c:604 [inline]
[<00000000baa576ae>] seccomp_set_mode_filter kernel/seccomp.c:1535 [inline]
[<00000000baa576ae>] do_seccomp+0x32e/0xd40 kernel/seccomp.c:1649
[<00000000658618a4>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000b8258e4d>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff888119d65c00 (size 32):
comm "syz-executor.0", pid 6688, jiffies 4294954707 (age 12.810s)
hex dump (first 32 bytes):
06 00 00 00 fb ff ff 7f 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000ad603142>] kmemdup+0x23/0x50 mm/util.c:127
[<0000000001d3eabf>] kmemdup include/linux/string.h:479 [inline]
[<0000000001d3eabf>] bpf_prog_store_orig_filter+0x5e/0xa0 net/core/filter.c:1138
[<000000005d9b7cd2>] bpf_prog_create_from_user+0xda/0x2a0 net/core/filter.c:1422
[<00000000baa576ae>] seccomp_prepare_filter kernel/seccomp.c:567 [inline]
[<00000000baa576ae>] seccomp_prepare_user_filter kernel/seccomp.c:604 [inline]
[<00000000baa576ae>] seccomp_set_mode_filter kernel/seccomp.c:1535 [inline]
[<00000000baa576ae>] do_seccomp+0x32e/0xd40 kernel/seccomp.c:1649
[<00000000658618a4>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000b8258e4d>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881131ecb00 (size 96):
comm "syz-executor.0", pid 6688, jiffies 4294954707 (age 12.810s)
hex dump (first 32 bytes):
01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 ................
80 ea 10 13 81 88 ff ff 00 b0 d8 00 00 c9 ff ff ................
backtrace:
[<0000000073bb6e7d>] kmalloc include/linux/slab.h:554 [inline]
[<0000000073bb6e7d>] kzalloc include/linux/slab.h:666 [inline]
[<0000000073bb6e7d>] seccomp_prepare_filter kernel/seccomp.c:562 [inline]
[<0000000073bb6e7d>] seccomp_prepare_user_filter kernel/seccomp.c:604 [inline]
[<0000000073bb6e7d>] seccomp_set_mode_filter kernel/seccomp.c:1535 [inline]
[<0000000073bb6e7d>] do_seccomp+0x2ec/0xd40 kernel/seccomp.c:1649
[<00000000658618a4>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000b8258e4d>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811310e400 (size 96):
comm "syz-executor.0", pid 6702, jiffies 4294955242 (age 7.460s)
hex dump (first 32 bytes):
01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 50 e1 00 00 c9 ff ff .........P......
backtrace:
[<0000000073bb6e7d>] kmalloc include/linux/slab.h:554 [inline]
[<0000000073bb6e7d>] kzalloc include/linux/slab.h:666 [inline]
[<0000000073bb6e7d>] seccomp_prepare_filter kernel/seccomp.c:562 [inline]
[<0000000073bb6e7d>] seccomp_prepare_user_filter kernel/seccomp.c:604 [inline]
[<0000000073bb6e7d>] seccomp_set_mode_filter kernel/seccomp.c:1535 [inline]
[<0000000073bb6e7d>] do_seccomp+0x2ec/0xd40 kernel/seccomp.c:1649
[<00000000658618a4>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000b8258e4d>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
---
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syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
syzbot has found a reproducer for the following issue on:
HEAD commit: dcc5c6f0 Merge tag 'x86-urgent-2020-08-30' of git://git.ke..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10b297d5900000
kernel config: https://syzkaller.appspot.com/x/.config?x=903b9fecc3c6d231
dashboard link: https://syzkaller.appspot.com/bug?extid=3ad9614a12f80994c32e
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14649561900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=118aacc1900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]
executing program
executing program
executing program
executing program
executing program
BUG: memory leak
unreferenced object 0xffff88811ba93600 (size 64):
comm "syz-executor680", pid 6503, jiffies 4294951104 (age 21.940s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 36 a9 1b 81 88 ff ff .........6......
08 36 a9 1b 81 88 ff ff 11 ce 98 89 3a d5 b4 8f .6..........:...
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba936c0 (size 64):
comm "syz-executor680", pid 6507, jiffies 4294951104 (age 21.940s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 c8 36 a9 1b 81 88 ff ff .........6......
c8 36 a9 1b 81 88 ff ff da fb d1 41 a1 10 39 25 .6.........A..9%
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93700 (size 64):
comm "syz-executor680", pid 6509, jiffies 4294951104 (age 21.940s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 37 a9 1b 81 88 ff ff .........7......
08 37 a9 1b 81 88 ff ff d9 22 de 70 43 30 b3 2f .7.......".pC0./
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93800 (size 64):
comm "syz-executor680", pid 6511, jiffies 4294951104 (age 21.940s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 38 a9 1b 81 88 ff ff .........8......
08 38 a9 1b 81 88 ff ff e4 c1 14 15 81 90 49 44 .8............ID
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb800 (size 64):
comm "syz-executor680", pid 6506, jiffies 4294951104 (age 21.940s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 b8 3c 19 81 88 ff ff ..........<.....
08 b8 3c 19 81 88 ff ff 87 43 ff ae fd 23 b0 15 ..<......C...#..
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb740 (size 64):
comm "syz-executor680", pid 6513, jiffies 4294951104 (age 21.940s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 48 b7 3c 19 81 88 ff ff ........H.<.....
48 b7 3c 19 81 88 ff ff 0b 68 b6 93 80 9b 8d 35 H.<......h.....5
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb640 (size 64):
comm "syz-executor680", pid 6515, jiffies 4294951105 (age 21.930s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 48 b6 3c 19 81 88 ff ff ........H.<.....
48 b6 3c 19 81 88 ff ff b4 5e 22 0a b5 50 fa a5 H.<......^"..P..
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93600 (size 64):
comm "syz-executor680", pid 6503, jiffies 4294951104 (age 23.180s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 36 a9 1b 81 88 ff ff .........6......
08 36 a9 1b 81 88 ff ff 11 ce 98 89 3a d5 b4 8f .6..........:...
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba936c0 (size 64):
comm "syz-executor680", pid 6507, jiffies 4294951104 (age 23.180s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 c8 36 a9 1b 81 88 ff ff .........6......
c8 36 a9 1b 81 88 ff ff da fb d1 41 a1 10 39 25 .6.........A..9%
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93700 (size 64):
comm "syz-executor680", pid 6509, jiffies 4294951104 (age 23.180s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 37 a9 1b 81 88 ff ff .........7......
08 37 a9 1b 81 88 ff ff d9 22 de 70 43 30 b3 2f .7.......".pC0./
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93800 (size 64):
comm "syz-executor680", pid 6511, jiffies 4294951104 (age 23.180s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 38 a9 1b 81 88 ff ff .........8......
08 38 a9 1b 81 88 ff ff e4 c1 14 15 81 90 49 44 .8............ID
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb800 (size 64):
comm "syz-executor680", pid 6506, jiffies 4294951104 (age 23.180s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 b8 3c 19 81 88 ff ff ..........<.....
08 b8 3c 19 81 88 ff ff 87 43 ff ae fd 23 b0 15 ..<......C...#..
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb740 (size 64):
comm "syz-executor680", pid 6513, jiffies 4294951104 (age 23.180s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 48 b7 3c 19 81 88 ff ff ........H.<.....
48 b7 3c 19 81 88 ff ff 0b 68 b6 93 80 9b 8d 35 H.<......h.....5
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb640 (size 64):
comm "syz-executor680", pid 6515, jiffies 4294951105 (age 23.170s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 48 b6 3c 19 81 88 ff ff ........H.<.....
48 b6 3c 19 81 88 ff ff b4 5e 22 0a b5 50 fa a5 H.<......^"..P..
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93600 (size 64):
comm "syz-executor680", pid 6503, jiffies 4294951104 (age 24.450s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 36 a9 1b 81 88 ff ff .........6......
08 36 a9 1b 81 88 ff ff 11 ce 98 89 3a d5 b4 8f .6..........:...
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba936c0 (size 64):
comm "syz-executor680", pid 6507, jiffies 4294951104 (age 24.450s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 c8 36 a9 1b 81 88 ff ff .........6......
c8 36 a9 1b 81 88 ff ff da fb d1 41 a1 10 39 25 .6.........A..9%
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93700 (size 64):
comm "syz-executor680", pid 6509, jiffies 4294951104 (age 24.450s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 37 a9 1b 81 88 ff ff .........7......
08 37 a9 1b 81 88 ff ff d9 22 de 70 43 30 b3 2f .7.......".pC0./
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93800 (size 64):
comm "syz-executor680", pid 6511, jiffies 4294951104 (age 24.450s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 38 a9 1b 81 88 ff ff .........8......
08 38 a9 1b 81 88 ff ff e4 c1 14 15 81 90 49 44 .8............ID
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb800 (size 64):
comm "syz-executor680", pid 6506, jiffies 4294951104 (age 24.450s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 b8 3c 19 81 88 ff ff ..........<.....
08 b8 3c 19 81 88 ff ff 87 43 ff ae fd 23 b0 15 ..<......C...#..
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb740 (size 64):
comm "syz-executor680", pid 6513, jiffies 4294951104 (age 24.450s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 48 b7 3c 19 81 88 ff ff ........H.<.....
48 b7 3c 19 81 88 ff ff 0b 68 b6 93 80 9b 8d 35 H.<......h.....5
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb640 (size 64):
comm "syz-executor680", pid 6515, jiffies 4294951105 (age 24.440s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 48 b6 3c 19 81 88 ff ff ........H.<.....
48 b6 3c 19 81 88 ff ff b4 5e 22 0a b5 50 fa a5 H.<......^"..P..
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93600 (size 64):
comm "syz-executor680", pid 6503, jiffies 4294951104 (age 25.710s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 36 a9 1b 81 88 ff ff .........6......
08 36 a9 1b 81 88 ff ff 11 ce 98 89 3a d5 b4 8f .6..........:...
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba936c0 (size 64):
comm "syz-executor680", pid 6507, jiffies 4294951104 (age 25.710s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 c8 36 a9 1b 81 88 ff ff .........6......
c8 36 a9 1b 81 88 ff ff da fb d1 41 a1 10 39 25 .6.........A..9%
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93700 (size 64):
comm "syz-executor680", pid 6509, jiffies 4294951104 (age 25.710s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 37 a9 1b 81 88 ff ff .........7......
08 37 a9 1b 81 88 ff ff d9 22 de 70 43 30 b3 2f .7.......".pC0./
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93800 (size 64):
comm "syz-executor680", pid 6511, jiffies 4294951104 (age 25.710s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 38 a9 1b 81 88 ff ff .........8......
08 38 a9 1b 81 88 ff ff e4 c1 14 15 81 90 49 44 .8............ID
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb800 (size 64):
comm "syz-executor680", pid 6506, jiffies 4294951104 (age 25.710s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 b8 3c 19 81 88 ff ff ..........<.....
08 b8 3c 19 81 88 ff ff 87 43 ff ae fd 23 b0 15 ..<......C...#..
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb740 (size 64):
comm "syz-executor680", pid 6513, jiffies 4294951104 (age 25.710s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 48 b7 3c 19 81 88 ff ff ........H.<.....
48 b7 3c 19 81 88 ff ff 0b 68 b6 93 80 9b 8d 35 H.<......h.....5
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb640 (size 64):
comm "syz-executor680", pid 6515, jiffies 4294951105 (age 25.700s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 48 b6 3c 19 81 88 ff ff ........H.<.....
48 b6 3c 19 81 88 ff ff b4 5e 22 0a b5 50 fa a5 H.<......^"..P..
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93600 (size 64):
comm "syz-executor680", pid 6503, jiffies 4294951104 (age 28.150s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 36 a9 1b 81 88 ff ff .........6......
08 36 a9 1b 81 88 ff ff 11 ce 98 89 3a d5 b4 8f .6..........:...
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba936c0 (size 64):
comm "syz-executor680", pid 6507, jiffies 4294951104 (age 28.150s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 c8 36 a9 1b 81 88 ff ff .........6......
c8 36 a9 1b 81 88 ff ff da fb d1 41 a1 10 39 25 .6.........A..9%
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93700 (size 64):
comm "syz-executor680", pid 6509, jiffies 4294951104 (age 28.150s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 37 a9 1b 81 88 ff ff .........7......
08 37 a9 1b 81 88 ff ff d9 22 de 70 43 30 b3 2f .7.......".pC0./
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93800 (size 64):
comm "syz-executor680", pid 6511, jiffies 4294951104 (age 28.150s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 38 a9 1b 81 88 ff ff .........8......
08 38 a9 1b 81 88 ff ff e4 c1 14 15 81 90 49 44 .8............ID
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb800 (size 64):
comm "syz-executor680", pid 6506, jiffies 4294951104 (age 28.150s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 b8 3c 19 81 88 ff ff ..........<.....
08 b8 3c 19 81 88 ff ff 87 43 ff ae fd 23 b0 15 ..<......C...#..
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb740 (size 64):
comm "syz-executor680", pid 6513, jiffies 4294951104 (age 28.150s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 48 b7 3c 19 81 88 ff ff ........H.<.....
48 b7 3c 19 81 88 ff ff 0b 68 b6 93 80 9b 8d 35 H.<......h.....5
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb640 (size 64):
comm "syz-executor680", pid 6515, jiffies 4294951105 (age 28.140s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 48 b6 3c 19 81 88 ff ff ........H.<.....
48 b6 3c 19 81 88 ff ff b4 5e 22 0a b5 50 fa a5 H.<......^"..P..
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93600 (size 64):
comm "syz-executor680", pid 6503, jiffies 4294951104 (age 29.390s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 36 a9 1b 81 88 ff ff .........6......
08 36 a9 1b 81 88 ff ff 11 ce 98 89 3a d5 b4 8f .6..........:...
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba936c0 (size 64):
comm "syz-executor680", pid 6507, jiffies 4294951104 (age 29.390s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 c8 36 a9 1b 81 88 ff ff .........6......
c8 36 a9 1b 81 88 ff ff da fb d1 41 a1 10 39 25 .6.........A..9%
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93700 (size 64):
comm "syz-executor680", pid 6509, jiffies 4294951104 (age 29.390s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 37 a9 1b 81 88 ff ff .........7......
08 37 a9 1b 81 88 ff ff d9 22 de 70 43 30 b3 2f .7.......".pC0./
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811ba93800 (size 64):
comm "syz-executor680", pid 6511, jiffies 4294951104 (age 29.390s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 38 a9 1b 81 88 ff ff .........8......
08 38 a9 1b 81 88 ff ff e4 c1 14 15 81 90 49 44 .8............ID
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb800 (size 64):
comm "syz-executor680", pid 6506, jiffies 4294951104 (age 29.390s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 b8 3c 19 81 88 ff ff ..........<.....
08 b8 3c 19 81 88 ff ff 87 43 ff ae fd 23 b0 15 ..<......C...#..
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb740 (size 64):
comm "syz-executor680", pid 6513, jiffies 4294951104 (age 29.390s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 48 b7 3c 19 81 88 ff ff ........H.<.....
48 b7 3c 19 81 88 ff ff 0b 68 b6 93 80 9b 8d 35 H.<......h.....5
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff8881193cb640 (size 64):
comm "syz-executor680", pid 6515, jiffies 4294951105 (age 29.380s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 48 b6 3c 19 81 88 ff ff ........H.<.....
48 b6 3c 19 81 88 ff ff b4 5e 22 0a b5 50 fa a5 H.<......^"..P..
backtrace:
[<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
[<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
[<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
[<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
[<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
[<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
executing program
executing program
On Sun, Aug 30, 2020 at 08:50:15PM -0700, syzbot wrote:
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit: dcc5c6f0 Merge tag 'x86-urgent-2020-08-30' of git://git.ke..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=10b297d5900000
> kernel config: https://syzkaller.appspot.com/x/.config?x=903b9fecc3c6d231
> dashboard link: https://syzkaller.appspot.com/bug?extid=3ad9614a12f80994c32e
> compiler: gcc (GCC) 10.1.0-syz 20200507
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14649561900000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=118aacc1900000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: [email protected]
>
> executing program
> executing program
> executing program
> executing program
> executing program
> BUG: memory leak
> unreferenced object 0xffff88811ba93600 (size 64):
> comm "syz-executor680", pid 6503, jiffies 4294951104 (age 21.940s)
> hex dump (first 32 bytes):
> 00 00 00 00 00 00 00 00 08 36 a9 1b 81 88 ff ff .........6......
> 08 36 a9 1b 81 88 ff ff 11 ce 98 89 3a d5 b4 8f .6..........:...
> backtrace:
> [<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
> [<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
> [<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
> [<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
> [<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
> [<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
> [<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
I haven't narrowed this down yet (and it *might* be a false positive),
but it looks like this is filter->notif. The only way that's possible is
if seccomp_notify_release() was never called *and* seccomp_filter_free()
got called... which would imply a reference counting problem. The way
there doesn't jump out at me yet, but I haven't yet decoded the C
reproducer into the actual seccomp arguments, etc.
--
Kees Cook
On Mon, Aug 31, 2020 at 04:25:35PM -0700, Kees Cook wrote:
> On Sun, Aug 30, 2020 at 08:50:15PM -0700, syzbot wrote:
> > syzbot has found a reproducer for the following issue on:
> >
> > HEAD commit: dcc5c6f0 Merge tag 'x86-urgent-2020-08-30' of git://git.ke..
> > git tree: upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=10b297d5900000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=903b9fecc3c6d231
> > dashboard link: https://syzkaller.appspot.com/bug?extid=3ad9614a12f80994c32e
> > compiler: gcc (GCC) 10.1.0-syz 20200507
> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14649561900000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=118aacc1900000
> >
> > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > Reported-by: [email protected]
> >
> > executing program
> > executing program
> > executing program
> > executing program
> > executing program
> > BUG: memory leak
> > unreferenced object 0xffff88811ba93600 (size 64):
> > comm "syz-executor680", pid 6503, jiffies 4294951104 (age 21.940s)
> > hex dump (first 32 bytes):
> > 00 00 00 00 00 00 00 00 08 36 a9 1b 81 88 ff ff .........6......
> > 08 36 a9 1b 81 88 ff ff 11 ce 98 89 3a d5 b4 8f .6..........:...
> > backtrace:
> > [<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
> > [<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
> > [<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
> > [<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
> > [<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
> > [<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
> > [<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
>
> I haven't narrowed this down yet (and it *might* be a false positive),
> but it looks like this is filter->notif. The only way that's possible is
> if seccomp_notify_release() was never called *and* seccomp_filter_free()
> got called... which would imply a reference counting problem. The way
> there doesn't jump out at me yet, but I haven't yet decoded the C
> reproducer into the actual seccomp arguments, etc.
Looks like it's just a bunch of threads in the same thread group
trying to install a filter with TSYNC and NEW_LISTENER turned on. Does
the patch below look reasonable?
I didn't send it separately since I'm in the process of switching my
e-mail address to [email protected]; let this e-mail serve as proof
that that e-mail really is me too :). I can send it the normal way if
it looks good.
From d497e787e8e1b3e8b9230fdc4c9802616709c920 Mon Sep 17 00:00:00 2001
From: Tycho Andersen <[email protected]>
Date: Mon, 31 Aug 2020 17:55:07 -0600
Subject: [PATCH] seccomp: don't leak memory when filter install races
In seccomp_set_mode_filter() with TSYNC | NEW_LISTENER, we first initialize
the listener fd, then check to see if we can actually use it later in
seccomp_may_assign_mode(), which can fail if anyone else in our thread
group has installed a filter and caused some divergence. If we can't, we
partially clean up the newly allocated file: we put the fd, put the file,
but don't actually clean up the *memory* that was allocated at
filter->notif. Let's clean that up too.
Fixes: 51891498f2da ("seccomp: allow TSYNC and USER_NOTIF together")
Reported-by: [email protected]
Signed-off-by: Tycho Andersen <[email protected]>
---
kernel/seccomp.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index 3ee59ce0a323..21a76127833f 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -1581,6 +1581,8 @@ static long seccomp_set_mode_filter(unsigned int flags,
listener_f->private_data = NULL;
fput(listener_f);
put_unused_fd(listener);
+ kfree(filter->notif);
+ filter->notif = NULL;
} else {
fd_install(listener, listener_f);
ret = listener;
base-commit: b51594df17d0ce80b9f9f35394a1f42d7ac94472
--
2.25.1
On Mon, Aug 31, 2020 at 06:09:15PM -0600, Tycho Andersen wrote:
> On Mon, Aug 31, 2020 at 04:25:35PM -0700, Kees Cook wrote:
> > On Sun, Aug 30, 2020 at 08:50:15PM -0700, syzbot wrote:
> > > syzbot has found a reproducer for the following issue on:
> > >
> > > HEAD commit: dcc5c6f0 Merge tag 'x86-urgent-2020-08-30' of git://git.ke..
> > > git tree: upstream
> > > console output: https://syzkaller.appspot.com/x/log.txt?x=10b297d5900000
> > > kernel config: https://syzkaller.appspot.com/x/.config?x=903b9fecc3c6d231
> > > dashboard link: https://syzkaller.appspot.com/bug?extid=3ad9614a12f80994c32e
> > > compiler: gcc (GCC) 10.1.0-syz 20200507
> > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14649561900000
> > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=118aacc1900000
> > >
> > > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > > Reported-by: [email protected]
> > >
> > > executing program
> > > executing program
> > > executing program
> > > executing program
> > > executing program
> > > BUG: memory leak
> > > unreferenced object 0xffff88811ba93600 (size 64):
> > > comm "syz-executor680", pid 6503, jiffies 4294951104 (age 21.940s)
> > > hex dump (first 32 bytes):
> > > 00 00 00 00 00 00 00 00 08 36 a9 1b 81 88 ff ff .........6......
> > > 08 36 a9 1b 81 88 ff ff 11 ce 98 89 3a d5 b4 8f .6..........:...
> > > backtrace:
> > > [<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
> > > [<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
> > > [<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
> > > [<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
> > > [<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
> > > [<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
> > > [<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> >
> > I haven't narrowed this down yet (and it *might* be a false positive),
> > but it looks like this is filter->notif. The only way that's possible is
> > if seccomp_notify_release() was never called *and* seccomp_filter_free()
> > got called... which would imply a reference counting problem. The way
> > there doesn't jump out at me yet, but I haven't yet decoded the C
> > reproducer into the actual seccomp arguments, etc.
>
> Looks like it's just a bunch of threads in the same thread group
> trying to install a filter with TSYNC and NEW_LISTENER turned on. Does
> the patch below look reasonable?
>
> I didn't send it separately since I'm in the process of switching my
> e-mail address to [email protected]; let this e-mail serve as proof
> that that e-mail really is me too :). I can send it the normal way if
> it looks good.
>
>
> From d497e787e8e1b3e8b9230fdc4c9802616709c920 Mon Sep 17 00:00:00 2001
> From: Tycho Andersen <[email protected]>
> Date: Mon, 31 Aug 2020 17:55:07 -0600
> Subject: [PATCH] seccomp: don't leak memory when filter install races
>
> In seccomp_set_mode_filter() with TSYNC | NEW_LISTENER, we first initialize
> the listener fd, then check to see if we can actually use it later in
> seccomp_may_assign_mode(), which can fail if anyone else in our thread
> group has installed a filter and caused some divergence. If we can't, we
> partially clean up the newly allocated file: we put the fd, put the file,
> but don't actually clean up the *memory* that was allocated at
> filter->notif. Let's clean that up too.
>
> Fixes: 51891498f2da ("seccomp: allow TSYNC and USER_NOTIF together")
> Reported-by: [email protected]
> Signed-off-by: Tycho Andersen <[email protected]>
> ---
> kernel/seccomp.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/kernel/seccomp.c b/kernel/seccomp.c
> index 3ee59ce0a323..21a76127833f 100644
> --- a/kernel/seccomp.c
> +++ b/kernel/seccomp.c
> @@ -1581,6 +1581,8 @@ static long seccomp_set_mode_filter(unsigned int flags,
> listener_f->private_data = NULL;
> fput(listener_f);
> put_unused_fd(listener);
> + kfree(filter->notif);
> + filter->notif = NULL;
Oof, actually this isn't quite right. It should be s/filter/prepared/g.
I can fix that and send out a real patch that's actually tested at
some point tomorrow.
Tycho
On Mon, Aug 31, 2020 at 07:14:59PM -0600, Tycho Andersen wrote:
> On Mon, Aug 31, 2020 at 06:09:15PM -0600, Tycho Andersen wrote:
> > On Mon, Aug 31, 2020 at 04:25:35PM -0700, Kees Cook wrote:
> > > On Sun, Aug 30, 2020 at 08:50:15PM -0700, syzbot wrote:
> > > > syzbot has found a reproducer for the following issue on:
> > > >
> > > > HEAD commit: dcc5c6f0 Merge tag 'x86-urgent-2020-08-30' of git://git.ke..
> > > > git tree: upstream
> > > > console output: https://syzkaller.appspot.com/x/log.txt?x=10b297d5900000
> > > > kernel config: https://syzkaller.appspot.com/x/.config?x=903b9fecc3c6d231
> > > > dashboard link: https://syzkaller.appspot.com/bug?extid=3ad9614a12f80994c32e
> > > > compiler: gcc (GCC) 10.1.0-syz 20200507
> > > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14649561900000
> > > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=118aacc1900000
> > > >
> > > > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > > > Reported-by: [email protected]
> > > >
> > > > executing program
> > > > executing program
> > > > executing program
> > > > executing program
> > > > executing program
> > > > BUG: memory leak
> > > > unreferenced object 0xffff88811ba93600 (size 64):
> > > > comm "syz-executor680", pid 6503, jiffies 4294951104 (age 21.940s)
> > > > hex dump (first 32 bytes):
> > > > 00 00 00 00 00 00 00 00 08 36 a9 1b 81 88 ff ff .........6......
> > > > 08 36 a9 1b 81 88 ff ff 11 ce 98 89 3a d5 b4 8f .6..........:...
> > > > backtrace:
> > > > [<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
> > > > [<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
> > > > [<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
> > > > [<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
> > > > [<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
> > > > [<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
> > > > [<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > >
> > > I haven't narrowed this down yet (and it *might* be a false positive),
> > > but it looks like this is filter->notif. The only way that's possible is
> > > if seccomp_notify_release() was never called *and* seccomp_filter_free()
> > > got called... which would imply a reference counting problem. The way
> > > there doesn't jump out at me yet, but I haven't yet decoded the C
> > > reproducer into the actual seccomp arguments, etc.
> >
> > Looks like it's just a bunch of threads in the same thread group
> > trying to install a filter with TSYNC and NEW_LISTENER turned on. Does
> > the patch below look reasonable?
> >
> > I didn't send it separately since I'm in the process of switching my
> > e-mail address to [email protected]; let this e-mail serve as proof
> > that that e-mail really is me too :). I can send it the normal way if
> > it looks good.
> >
> >
> > From d497e787e8e1b3e8b9230fdc4c9802616709c920 Mon Sep 17 00:00:00 2001
> > From: Tycho Andersen <[email protected]>
> > Date: Mon, 31 Aug 2020 17:55:07 -0600
> > Subject: [PATCH] seccomp: don't leak memory when filter install races
> >
> > In seccomp_set_mode_filter() with TSYNC | NEW_LISTENER, we first initialize
> > the listener fd, then check to see if we can actually use it later in
> > seccomp_may_assign_mode(), which can fail if anyone else in our thread
> > group has installed a filter and caused some divergence. If we can't, we
> > partially clean up the newly allocated file: we put the fd, put the file,
> > but don't actually clean up the *memory* that was allocated at
> > filter->notif. Let's clean that up too.
> >
> > Fixes: 51891498f2da ("seccomp: allow TSYNC and USER_NOTIF together")
> > Reported-by: [email protected]
> > Signed-off-by: Tycho Andersen <[email protected]>
> > ---
> > kernel/seccomp.c | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/kernel/seccomp.c b/kernel/seccomp.c
> > index 3ee59ce0a323..21a76127833f 100644
> > --- a/kernel/seccomp.c
> > +++ b/kernel/seccomp.c
> > @@ -1581,6 +1581,8 @@ static long seccomp_set_mode_filter(unsigned int flags,
> > listener_f->private_data = NULL;
> > fput(listener_f);
> > put_unused_fd(listener);
> > + kfree(filter->notif);
> > + filter->notif = NULL;
>
> Oof, actually this isn't quite right. It should be s/filter/prepared/g.
> I can fix that and send out a real patch that's actually tested at
> some point tomorrow.
Please do. :)
Do we have tests for this scenario in the selftests, Tycho?
Christian
On Mon, Aug 31, 2020 at 07:14:59PM -0600, Tycho Andersen wrote:
> On Mon, Aug 31, 2020 at 06:09:15PM -0600, Tycho Andersen wrote:
> > On Mon, Aug 31, 2020 at 04:25:35PM -0700, Kees Cook wrote:
> > > On Sun, Aug 30, 2020 at 08:50:15PM -0700, syzbot wrote:
> > > > syzbot has found a reproducer for the following issue on:
> > > >
> > > > HEAD commit: dcc5c6f0 Merge tag 'x86-urgent-2020-08-30' of git://git.ke..
> > > > git tree: upstream
> > > > console output: https://syzkaller.appspot.com/x/log.txt?x=10b297d5900000
> > > > kernel config: https://syzkaller.appspot.com/x/.config?x=903b9fecc3c6d231
> > > > dashboard link: https://syzkaller.appspot.com/bug?extid=3ad9614a12f80994c32e
> > > > compiler: gcc (GCC) 10.1.0-syz 20200507
> > > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14649561900000
> > > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=118aacc1900000
> > > >
> > > > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > > > Reported-by: [email protected]
> > > >
> > > > executing program
> > > > executing program
> > > > executing program
> > > > executing program
> > > > executing program
> > > > BUG: memory leak
> > > > unreferenced object 0xffff88811ba93600 (size 64):
> > > > comm "syz-executor680", pid 6503, jiffies 4294951104 (age 21.940s)
> > > > hex dump (first 32 bytes):
> > > > 00 00 00 00 00 00 00 00 08 36 a9 1b 81 88 ff ff .........6......
> > > > 08 36 a9 1b 81 88 ff ff 11 ce 98 89 3a d5 b4 8f .6..........:...
> > > > backtrace:
> > > > [<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
> > > > [<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
> > > > [<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
> > > > [<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
> > > > [<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
> > > > [<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
> > > > [<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > >
> > > I haven't narrowed this down yet (and it *might* be a false positive),
> > > but it looks like this is filter->notif. The only way that's possible is
> > > if seccomp_notify_release() was never called *and* seccomp_filter_free()
> > > got called... which would imply a reference counting problem. The way
> > > there doesn't jump out at me yet, but I haven't yet decoded the C
> > > reproducer into the actual seccomp arguments, etc.
> >
> > Looks like it's just a bunch of threads in the same thread group
> > trying to install a filter with TSYNC and NEW_LISTENER turned on. Does
> > the patch below look reasonable?
> >
> > I didn't send it separately since I'm in the process of switching my
> > e-mail address to [email protected]; let this e-mail serve as proof
> > that that e-mail really is me too :). I can send it the normal way if
> > it looks good.
> >
> >
> > From d497e787e8e1b3e8b9230fdc4c9802616709c920 Mon Sep 17 00:00:00 2001
> > From: Tycho Andersen <[email protected]>
> > Date: Mon, 31 Aug 2020 17:55:07 -0600
> > Subject: [PATCH] seccomp: don't leak memory when filter install races
> >
> > In seccomp_set_mode_filter() with TSYNC | NEW_LISTENER, we first initialize
> > the listener fd, then check to see if we can actually use it later in
> > seccomp_may_assign_mode(), which can fail if anyone else in our thread
> > group has installed a filter and caused some divergence. If we can't, we
> > partially clean up the newly allocated file: we put the fd, put the file,
> > but don't actually clean up the *memory* that was allocated at
> > filter->notif. Let's clean that up too.
> >
> > Fixes: 51891498f2da ("seccomp: allow TSYNC and USER_NOTIF together")
> > Reported-by: [email protected]
> > Signed-off-by: Tycho Andersen <[email protected]>
> > ---
> > kernel/seccomp.c | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/kernel/seccomp.c b/kernel/seccomp.c
> > index 3ee59ce0a323..21a76127833f 100644
> > --- a/kernel/seccomp.c
> > +++ b/kernel/seccomp.c
> > @@ -1581,6 +1581,8 @@ static long seccomp_set_mode_filter(unsigned int flags,
> > listener_f->private_data = NULL;
> > fput(listener_f);
> > put_unused_fd(listener);
> > + kfree(filter->notif);
> > + filter->notif = NULL;
>
> Oof, actually this isn't quite right. It should be s/filter/prepared/g.
> I can fix that and send out a real patch that's actually tested at
> some point tomorrow.
Ah! Yes, nice catch. I was staring at the wrong failure path. :)
I'm thinking the free/NULL pattern, since it's repeated in a few places,
should likely be a short helper. I'll stare at this some more...
--
Kees Cook
On Tue, Sep 01, 2020 at 08:08:13AM -0700, Kees Cook wrote:
> On Mon, Aug 31, 2020 at 07:14:59PM -0600, Tycho Andersen wrote:
> > On Mon, Aug 31, 2020 at 06:09:15PM -0600, Tycho Andersen wrote:
> > > On Mon, Aug 31, 2020 at 04:25:35PM -0700, Kees Cook wrote:
> > > > On Sun, Aug 30, 2020 at 08:50:15PM -0700, syzbot wrote:
> > > > > syzbot has found a reproducer for the following issue on:
> > > > >
> > > > > HEAD commit: dcc5c6f0 Merge tag 'x86-urgent-2020-08-30' of git://git.ke..
> > > > > git tree: upstream
> > > > > console output: https://syzkaller.appspot.com/x/log.txt?x=10b297d5900000
> > > > > kernel config: https://syzkaller.appspot.com/x/.config?x=903b9fecc3c6d231
> > > > > dashboard link: https://syzkaller.appspot.com/bug?extid=3ad9614a12f80994c32e
> > > > > compiler: gcc (GCC) 10.1.0-syz 20200507
> > > > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14649561900000
> > > > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=118aacc1900000
> > > > >
> > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > > > > Reported-by: [email protected]
> > > > >
> > > > > executing program
> > > > > executing program
> > > > > executing program
> > > > > executing program
> > > > > executing program
> > > > > BUG: memory leak
> > > > > unreferenced object 0xffff88811ba93600 (size 64):
> > > > > comm "syz-executor680", pid 6503, jiffies 4294951104 (age 21.940s)
> > > > > hex dump (first 32 bytes):
> > > > > 00 00 00 00 00 00 00 00 08 36 a9 1b 81 88 ff ff .........6......
> > > > > 08 36 a9 1b 81 88 ff ff 11 ce 98 89 3a d5 b4 8f .6..........:...
> > > > > backtrace:
> > > > > [<00000000896418b0>] kmalloc include/linux/slab.h:554 [inline]
> > > > > [<00000000896418b0>] kzalloc include/linux/slab.h:666 [inline]
> > > > > [<00000000896418b0>] init_listener kernel/seccomp.c:1473 [inline]
> > > > > [<00000000896418b0>] seccomp_set_mode_filter kernel/seccomp.c:1546 [inline]
> > > > > [<00000000896418b0>] do_seccomp+0x8ce/0xd40 kernel/seccomp.c:1649
> > > > > [<000000002b04976c>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
> > > > > [<00000000322b4126>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > > >
> > > > I haven't narrowed this down yet (and it *might* be a false positive),
> > > > but it looks like this is filter->notif. The only way that's possible is
> > > > if seccomp_notify_release() was never called *and* seccomp_filter_free()
> > > > got called... which would imply a reference counting problem. The way
> > > > there doesn't jump out at me yet, but I haven't yet decoded the C
> > > > reproducer into the actual seccomp arguments, etc.
> > >
> > > Looks like it's just a bunch of threads in the same thread group
> > > trying to install a filter with TSYNC and NEW_LISTENER turned on. Does
> > > the patch below look reasonable?
> > >
> > > I didn't send it separately since I'm in the process of switching my
> > > e-mail address to [email protected]; let this e-mail serve as proof
> > > that that e-mail really is me too :). I can send it the normal way if
> > > it looks good.
> > >
> > >
> > > From d497e787e8e1b3e8b9230fdc4c9802616709c920 Mon Sep 17 00:00:00 2001
> > > From: Tycho Andersen <[email protected]>
> > > Date: Mon, 31 Aug 2020 17:55:07 -0600
> > > Subject: [PATCH] seccomp: don't leak memory when filter install races
> > >
> > > In seccomp_set_mode_filter() with TSYNC | NEW_LISTENER, we first initialize
> > > the listener fd, then check to see if we can actually use it later in
> > > seccomp_may_assign_mode(), which can fail if anyone else in our thread
> > > group has installed a filter and caused some divergence. If we can't, we
> > > partially clean up the newly allocated file: we put the fd, put the file,
> > > but don't actually clean up the *memory* that was allocated at
> > > filter->notif. Let's clean that up too.
> > >
> > > Fixes: 51891498f2da ("seccomp: allow TSYNC and USER_NOTIF together")
> > > Reported-by: [email protected]
> > > Signed-off-by: Tycho Andersen <[email protected]>
> > > ---
> > > kernel/seccomp.c | 2 ++
> > > 1 file changed, 2 insertions(+)
> > >
> > > diff --git a/kernel/seccomp.c b/kernel/seccomp.c
> > > index 3ee59ce0a323..21a76127833f 100644
> > > --- a/kernel/seccomp.c
> > > +++ b/kernel/seccomp.c
> > > @@ -1581,6 +1581,8 @@ static long seccomp_set_mode_filter(unsigned int flags,
> > > listener_f->private_data = NULL;
> > > fput(listener_f);
> > > put_unused_fd(listener);
> > > + kfree(filter->notif);
> > > + filter->notif = NULL;
> >
> > Oof, actually this isn't quite right. It should be s/filter/prepared/g.
> > I can fix that and send out a real patch that's actually tested at
> > some point tomorrow.
>
> Ah! Yes, nice catch. I was staring at the wrong failure path. :)
>
> I'm thinking the free/NULL pattern, since it's repeated in a few places,
> should likely be a short helper. I'll stare at this some more...
I think (?) it's just two, one here and one in
seccomp_notify_release() but agreed. Maybe something like (untested):
diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index 3b593b4caaa5..bb0dd9ae699a 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -1109,13 +1109,12 @@ static long seccomp_set_mode_strict(void)
}
#ifdef CONFIG_SECCOMP_FILTER
-static int seccomp_notify_release(struct inode *inode, struct file *file)
+static void seccomp_notify_detach(struct seccomp_filter *filter)
{
- struct seccomp_filter *filter = file->private_data;
struct seccomp_knotif *knotif;
if (!filter)
- return 0;
+ return;
mutex_lock(&filter->notify_lock);
@@ -1142,6 +1141,13 @@ static int seccomp_notify_release(struct inode *inode, struct file *file)
kfree(filter->notif);
filter->notif = NULL;
mutex_unlock(&filter->notify_lock);
+}
+
+static int seccomp_notify_release(struct inode *inode, struct file *file)
+{
+ struct seccomp_filter *filter = file->private_data;
+
+ seccomp_notify_detach(filter);
__put_seccomp_filter(filter);
return 0;
}
@@ -1581,8 +1587,7 @@ static long seccomp_set_mode_filter(unsigned int flags,
listener_f->private_data = NULL;
fput(listener_f);
put_unused_fd(listener);
- kfree(prepared->notif);
- filter->notif = NULL;
+ seccomp_notify_detach(prepared);
} else {
fd_install(listener, listener_f);
ret = listener;