Hello,
syzbot found the following crash on:
HEAD commit: 3ab4436f Merge tag 'nfsd-5.2-1' of git://linux-nfs.org/~bf..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15feaf82a00000
kernel config: https://syzkaller.appspot.com/x/.config?x=50393f7bfe444ff6
dashboard link: https://syzkaller.appspot.com/bug?extid=722da59ccb264bc19910
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12f02772a00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1657b80ea00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: [email protected]
035][ T7273] IPVS: ftp: loaded support on port[0] = 21
BUG: memory leak
unreferenced object 0xffff88810acd8a80 (size 96):
comm "syz-executor073", pid 7254, jiffies 4294950560 (age 22.250s)
hex dump (first 32 bytes):
02 00 00 00 00 00 00 00 50 8b bb 82 ff ff ff ff ........P.......
00 00 00 00 00 00 00 00 00 77 bb 82 ff ff ff ff .........w......
backtrace:
[<0000000013db61f1>] kmemleak_alloc_recursive
include/linux/kmemleak.h:55 [inline]
[<0000000013db61f1>] slab_post_alloc_hook mm/slab.h:439 [inline]
[<0000000013db61f1>] slab_alloc_node mm/slab.c:3269 [inline]
[<0000000013db61f1>] kmem_cache_alloc_node_trace+0x15b/0x2a0
mm/slab.c:3597
[<000000001a27307d>] __do_kmalloc_node mm/slab.c:3619 [inline]
[<000000001a27307d>] __kmalloc_node+0x38/0x50 mm/slab.c:3627
[<0000000025054add>] kmalloc_node include/linux/slab.h:590 [inline]
[<0000000025054add>] kvmalloc_node+0x4a/0xd0 mm/util.c:431
[<0000000050d1bc00>] kvmalloc include/linux/mm.h:637 [inline]
[<0000000050d1bc00>] kvzalloc include/linux/mm.h:645 [inline]
[<0000000050d1bc00>] allocate_hook_entries_size+0x3b/0x60
net/netfilter/core.c:61
[<00000000e8abe142>] nf_hook_entries_grow+0xae/0x270
net/netfilter/core.c:128
[<000000004b94797c>] __nf_register_net_hook+0x9a/0x170
net/netfilter/core.c:337
[<00000000d1545cbc>] nf_register_net_hook+0x34/0xc0
net/netfilter/core.c:464
[<00000000876c9b55>] nf_register_net_hooks+0x53/0xc0
net/netfilter/core.c:480
[<000000002ea868e0>] __ip_vs_init+0xe8/0x170
net/netfilter/ipvs/ip_vs_core.c:2280
[<000000002eb2d451>] ops_init+0x4c/0x140 net/core/net_namespace.c:130
[<000000000284ec48>] setup_net+0xde/0x230 net/core/net_namespace.c:316
[<00000000a70600fa>] copy_net_ns+0xf0/0x1e0 net/core/net_namespace.c:439
[<00000000ff26c15e>] create_new_namespaces+0x141/0x2a0
kernel/nsproxy.c:107
[<00000000b103dc79>] copy_namespaces+0xa1/0xe0 kernel/nsproxy.c:165
[<000000007cc008a2>] copy_process.part.0+0x11fd/0x2150
kernel/fork.c:2035
[<00000000c344af7c>] copy_process kernel/fork.c:1800 [inline]
[<00000000c344af7c>] _do_fork+0x121/0x4f0 kernel/fork.c:2369
BUG: memory leak
unreferenced object 0xffff8881065de500 (size 96):
comm "syz-executor073", pid 7254, jiffies 4294950560 (age 22.250s)
hex dump (first 32 bytes):
02 00 00 00 00 00 00 00 e0 8a bb 82 ff ff ff ff ................
00 00 00 00 00 00 00 00 90 76 bb 82 ff ff ff ff .........v......
backtrace:
[<0000000013db61f1>] kmemleak_alloc_recursive
include/linux/kmemleak.h:55 [inline]
[<0000000013db61f1>] slab_post_alloc_hook mm/slab.h:439 [inline]
[<0000000013db61f1>] slab_alloc_node mm/slab.c:3269 [inline]
[<0000000013db61f1>] kmem_cache_alloc_node_trace+0x15b/0x2a0
mm/slab.c:3597
[<000000001a27307d>] __do_kmalloc_node mm/slab.c:3619 [inline]
[<000000001a27307d>] __kmalloc_node+0x38/0x50 mm/slab.c:3627
[<0000000025054add>] kmalloc_node include/linux/slab.h:590 [inline]
[<0000000025054add>] kvmalloc_node+0x4a/0xd0 mm/util.c:431
[<0000000050d1bc00>] kvmalloc include/linux/mm.h:637 [inline]
[<0000000050d1bc00>] kvzalloc include/linux/mm.h:645 [inline]
[<0000000050d1bc00>] allocate_hook_entries_size+0x3b/0x60
net/netfilter/core.c:61
[<00000000e8abe142>] nf_hook_entries_grow+0xae/0x270
net/netfilter/core.c:128
[<000000004b94797c>] __nf_register_net_hook+0x9a/0x170
net/netfilter/core.c:337
[<00000000d1545cbc>] nf_register_net_hook+0x34/0xc0
net/netfilter/core.c:464
[<00000000876c9b55>] nf_register_net_hooks+0x53/0xc0
net/netfilter/core.c:480
[<000000002ea868e0>] __ip_vs_init+0xe8/0x170
net/netfilter/ipvs/ip_vs_core.c:2280
[<000000002eb2d451>] ops_init+0x4c/0x140 net/core/net_namespace.c:130
[<000000000284ec48>] setup_net+0xde/0x230 net/core/net_namespace.c:316
[<00000000a70600fa>] copy_net_ns+0xf0/0x1e0 net/core/net_namespace.c:439
[<00000000ff26c15e>] create_new_namespaces+0x141/0x2a0
kernel/nsproxy.c:107
[<00000000b103dc79>] copy_namespaces+0xa1/0xe0 kernel/nsproxy.c:165
[<000000007cc008a2>] copy_process.part.0+0x11fd/0x2150
kernel/fork.c:2035
[<00000000c344af7c>] copy_process kernel/fork.c:1800 [inline]
[<00000000c344af7c>] _do_fork+0x121/0x4f0 kernel/fork.c:2369
BUG: memory leak
unreferenced object 0xffff888103533c80 (size 96):
comm "syz-executor073", pid 7254, jiffies 4294950626 (age 21.590s)
hex dump (first 32 bytes):
02 00 00 00 00 00 00 00 70 77 bb 82 ff ff ff ff ........pw......
00 00 00 00 00 00 00 00 50 8b bb 82 ff ff ff ff ........P.......
backtrace:
[<0000000013db61f1>] kmemleak_alloc_recursive
include/linux/kmemleak.h:55 [inline]
[<0000000013db61f1>] slab_post_alloc_hook mm/slab.h:439 [inline]
[<0000000013db61f1>] slab_alloc_node mm/slab.c:3269 [inline]
[<0000000013db61f1>] kmem_cache_alloc_node_trace+0x15b/0x2a0
mm/slab.c:3597
[<000000001a27307d>] __do_kmalloc_node mm/slab.c:3619 [inline]
[<000000001a27307d>] __kmalloc_node+0x38/0x50 mm/slab.c:3627
[<0000000025054add>] kmalloc_node include/linux/slab.h:590 [inline]
[<0000000025054add>] kvmalloc_node+0x4a/0xd0 mm/util.c:431
[<0000000050d1bc00>] kvmalloc include/linux/mm.h:637 [inline]
[<0000000050d1bc00>] kvzalloc include/linux/mm.h:645 [inline]
[<0000000050d1bc00>] allocate_hook_entries_size+0x3b/0x60
net/netfilter/core.c:61
[<00000000343067d2>] __nf_hook_entries_try_shrink+0xbd/0x190
net/netfilter/core.c:248
[<0000000004051f14>] __nf_unregister_net_hook+0x12f/0x1b0
net/netfilter/core.c:416
[<00000000f74d14d1>] nf_unregister_net_hook+0x32/0x70
net/netfilter/core.c:431
[<00000000de019d2a>] nf_unregister_net_hooks+0x3d/0x50
net/netfilter/core.c:499
[<00000000fbdf13a9>] selinux_nf_unregister+0x22/0x30
security/selinux/hooks.c:7089
[<00000000ff82a3bf>] ops_exit_list.isra.0+0x4c/0x80
net/core/net_namespace.c:154
[<000000008a424b95>] setup_net+0x14a/0x230 net/core/net_namespace.c:333
[<00000000a70600fa>] copy_net_ns+0xf0/0x1e0 net/core/net_namespace.c:439
[<00000000ff26c15e>] create_new_namespaces+0x141/0x2a0
kernel/nsproxy.c:107
[<00000000b103dc79>] copy_namespaces+0xa1/0xe0 kernel/nsproxy.c:165
[<000000007cc008a2>] copy_process.part.0+0x11fd/0x2150
kernel/fork.c:2035
[<00000000c344af7c>] copy_process kernel/fork.c:1800 [inline]
[<00000000c344af7c>] _do_fork+0x121/0x4f0 kernel/fork.c:2369
BUG: memory leak
unreferenced object 0xffff88810acd8a80 (size 96):
comm "syz-executor073", pid 7254, jiffies 4294950560 (age 23.590s)
hex dump (first 32 bytes):
02 00 00 00 00 00 00 00 50 8b bb 82 ff ff ff ff ........P.......
00 00 00 00 00 00 00 00 00 77 bb 82 ff ff ff ff .........w......
backtrace:
[<0000000013db61f1>] kmemleak_alloc_recursive
include/linux/kmemleak.h:55 [inline]
[<0000000013db61f1>] slab_post_alloc_hook mm/slab.h:439 [inline]
[<0000000013db61f1>] slab_alloc_node mm/slab.c:3269 [inline]
[<0000000013db61f1>] kmem_cache_alloc_node_trace+0x15b/0x2a0
mm/slab.c:3597
[<000000001a27307d>] __do_kmalloc_node mm/slab.c:3619 [inline]
[<000000001a27307d>] __kmalloc_node+0x38/0x50 mm/slab.c:3627
[<0000000025054add>] kmalloc_node include/linux/slab.h:590 [inline]
[<0000000025054add>] kvmalloc_node+0x4a/0xd0 mm/util.c:431
[<0000000050d1bc00>] kvmalloc include/linux/mm.h:637 [inline]
[<0000000050d1bc00>] kvzalloc include/linux/mm.h:645 [inline]
[<0000000050d1bc00>] allocate_hook_entries_size+0x3b/0x60
net/netfilter/core.c:61
[<00000000e8abe142>] nf_hook_entries_grow+0xae/0x270
net/netfilter/core.c:128
[<000000004b94797c>] __nf_register_net_hook+0x9a/0x170
net/netfilter/core.c:337
[<00000000d1545cbc>] nf_register_net_hook+0x34/0xc0
net/netfilter/core.c:464
[<00000000876c9b55>] nf_register_net_hooks+0x53/0xc0
net/netfilter/core.c:480
[<000000002ea868e0>] __ip_vs_init+0xe8/0x170
net/netfilter/ipvs/ip_vs_core.c:2280
[<000000002eb2d451>] ops_init+0x4c/0x140 net/core/net_namespace.c:130
[<000000000284ec48>] setup_net+0xde/0x230 net/core/net_namespace.c:316
[<00000000a70600fa>] copy_net_ns+0xf0/0x1e0 net/core/net_namespace.c:439
[<00000000ff26c15e>] create_new_namespaces+0x141/0x2a0
kernel/nsproxy.c:107
[<00000000b103dc79>] copy_namespaces+0xa1/0xe0 kernel/nsproxy.c:165
[<000000007cc008a2>] copy_process.part.0+0x11fd/0x2150
kernel/fork.c:2035
[<00000000c344af7c>] copy_process kernel/fork.c:1800 [inline]
[<00000000c344af7c>] _do_fork+0x121/0x4f0 kernel/fork.c:2369
BUG: memory leak
unreferenced object 0xffff8881065de500 (size 96):
comm "syz-executor073", pid 7254, jiffies 4294950560 (age 23.590s)
hex dump (first 32 bytes):
02 00 00 00 00 00 00 00 e0 8a bb 82 ff ff ff ff ................
00 00 00 00 00 00 00 00 90 76 bb 82 ff ff ff ff .........v......
backtrace:
[<0000000013db61f1>] kmemleak_alloc_recursive
include/linux/kmemleak.h:55 [inline]
[<0000000013db61f1>] slab_post_alloc_hook mm/slab.h:439 [inline]
[<0000000013db61f1>] slab_alloc_node mm/slab.c:3269 [inline]
[<0000000013db61f1>] kmem_cache_alloc_node_trace+0x15b/0x2a0
mm/slab.c:3597
[<000000001a27307d>] __do_kmalloc_node mm/slab.c:3619 [inline]
[<000000001a27307d>] __kmalloc_node+0x38/0x50 mm/slab.c:3627
[<0000000025054add>] kmalloc_node include/linux/slab.h:590 [inline]
[<0000000025054add>] kvmalloc_node+0x4a/0xd0 mm/util.c:431
[<0000000050d1bc00>] kvmalloc include/linux/mm.h:637 [inline]
[<0000000050d1bc00>] kvzalloc include/linux/mm.h:645 [inline]
[<0000000050d1bc00>] allocate_hook_entries_size+0x3b/0x60
net/netfilter/core.c:61
[<00000000e8abe142>] nf_hook_entries_grow+0xae/0x270
net/netfilter/core.c:128
[<000000004b94797c>] __nf_register_net_hook+0x9a/0x170
net/netfilter/core.c:337
[<00000000d1545cbc>] nf_register_net_hook+0x34/0xc0
net/netfilter/core.c:464
[<00000000876c9b55>] nf_register_net_hooks+0x53/0xc0
net/netfilter/core.c:480
[<000000002ea868e0>] __ip_vs_init+0xe8/0x170
net/netfilter/ipvs/ip_vs_core.c:2280
[<000000002eb2d451>] ops_init+0x4c/0x140 net/core/net_namespace.c:130
[<000000000284ec48>] setup_net+0xde/0x230 net/core/net_namespace.c:316
[<00000000a70600fa>] copy_net_ns+0xf0/0x1e0 net/core/net_namespace.c:439
[<00000000ff26c15e>] create_new_namespaces+0x141/0x2a0
kernel/nsproxy.c:107
[<00000000b103dc79>] copy_namespaces+0xa1/0xe0 kernel/nsproxy.c:165
[<000000007cc008a2>] copy_process.part.0+0x11fd/0x2150
kernel/fork.c:2035
[<00000000c344af7c>] copy_process kernel/fork.c:1800 [inline]
[<00000000c344af7c>] _do_fork+0x121/0x4f0 kernel/fork.c:2369
BUG: memory leak
unreferenced object 0xffff888103533c80 (size 96):
comm "syz-executor073", pid 7254, jiffies 4294950626 (age 22.930s)
hex dump (first 32 bytes):
02 00 00 00 00 00 00 00 70 77 bb 82 ff ff ff ff ........pw......
00 00 00 00 00 00 00 00 50 8b bb 82 ff ff ff ff ........P.......
backtrace:
[<0000000013db61f1>] kmemleak_alloc_recursive
include/linux/kmemleak.h:55 [inline]
[<0000000013db61f1>] slab_post_alloc_hook mm/slab.h:439 [inline]
[<0000000013db61f1>] slab_alloc_node mm/slab.c:3269 [inline]
[<0000000013db61f1>] kmem_cache_alloc_node_trace+0x15b/0x2a0
mm/slab.c:3597
[<000000001a27307d>] __do_kmalloc_node mm/slab.c:3619 [inline]
[<000000001a27307d>] __kmalloc_node+0x38/0x50 mm/slab.c:3627
[<0000000025054add>] kmalloc_node include/linux/slab.h:590 [inline]
[<0000000025054add>] kvmalloc_node+0x4a/0xd0 mm/util.c:431
[<0000000050d1bc00>] kvmalloc include/linux/mm.h:637 [inline]
[<0000000050d1bc00>] kvzalloc include/linux/mm.h:645 [inline]
[<0000000050d1bc00>] allocate_hook_entries_size+0x3b/0x60
net/netfilter/core.c:61
[<00000000343067d2>] __nf_hook_entries_try_shrink+0xbd/0x190
net/netfilter/core.c:248
[<0000000004051f14>] __nf_unregister_net_hook+0x12f/0x1b0
net/netfilter/core.c:416
[<00000000f74d14d1>] nf_unregister_net_hook+0x32/0x70
net/netfilter/core.c:431
[<00000000de019d2a>] nf_unregister_net_hooks+0x3d/0x50
net/netfilter/core.c:499
[<00000000fbdf13a9>] selinux_nf_unregister+0x22/0x30
security/selinux/hooks.c:7089
[<00000000ff82a3bf>] ops_exit_list.isra.0+0x4c/0x80
net/core/net_namespace.c:154
[<000000008a424b95>] setup_net+0x14a/0x230 net/core/net_namespace.c:333
[<00000000a70600fa>] copy_net_ns+0xf0/0x1e0 net/core/net_namespace.c:439
[<00000000ff26c15e>] create_new_namespaces+0x141/0x2a0
kernel/nsproxy.c:107
[<00000000b103dc79>] copy_namespaces+0xa1/0xe0 kernel/nsproxy.c:165
[<000000007cc008a2>] copy_process.part.0+0x11fd/0x2150
kernel/fork.c:2035
[<00000000c344af7c>] copy_process kernel/fork.c:1800 [inline]
[<00000000c344af7c>] _do_fork+0x121/0x4f0 kernel/fork.c:2369
BUG: memory leak
unreferenced object 0xffff88810acd8a80 (size 96):
comm "syz-executor073", pid 7254, jiffies 4294950560 (age 24.970s)
hex dump (first 32 bytes):
02 00 00 00 00 00 00 00 50 8b bb 82 ff ff ff ff ........P.......
00 00 00 00 00 00 00 00 00 77 bb 82 ff ff ff ff .........w......
backtrace:
[<0000000013db61f1>] kmemleak_alloc_recursive
include/linux/kmemleak.h:55 [inline]
[<0000000013db61f1>] slab_post_alloc_hook mm/slab.h:439 [inline]
[<0000000013db61f1>] slab_alloc_node mm/slab.c:3269 [inline]
[<0000000013db61f1>] kmem_cache_alloc_node_trace+0x15b/0x2a0
mm/slab.c:3597
[<000000001a27307d>] __do_kmalloc_node mm/slab.c:3619 [inline]
[<000000001a27307d>] __kmalloc_node+0x38/0x50 mm/slab.c:3627
[<0000000025054add>] kmalloc_node include/linux/slab.h:590 [inline]
[<0000000025054add>] kvmalloc_node+0x4a/0xd0 mm/util.c:431
[<0000000050d1bc00>] kvmalloc include/linux/mm.h:637 [inline]
[<0000000050d1bc00>] kvzalloc include/linux/mm.h:645 [inline]
[<0000000050d1bc00>] allocate_hook_entries_size+0x3b/0x60
net/netfilter/core.c:61
[<00000000e8abe142>] nf_hook_entries_grow+0xae/0x270
net/netfilter/core.c:128
[<000000004b94797c>] __nf_register_net_hook+0x9a/0x170
net/netfilter/core.c:337
[<00000000d1545cbc>] nf_register_net_hook+0x34/0xc0
net/netfilter/core.c:464
[<00000000876c9b55>] nf_register_net_hooks+0x53/0xc0
net/netfilter/core.c:480
[<000000002ea868e0>] __ip_vs_init+0xe8/0x170
net/netfilter/ipvs/ip_vs_core.c:2280
[<000000002eb2d451>] ops_init+0x4c/0x140 net/core/net_namespace.c:130
[<000000000284ec48>] setup_net+0xde/0x230 net/core/net_namespace.c:316
[<00000000a70600fa>] copy_net_ns+0xf0/0x1e0 net/core/net_namespace.c:439
[<00000000ff26c15e>] create_new_namespaces+0x141/0x2a0
kernel/nsproxy.c:107
[<00000000b103dc79>] copy_namespaces+0xa1/0xe0 kernel/nsproxy.c:165
[<000000007cc008a2>] copy_process.part.0+0x11fd/0x2150
kernel/fork.c:2035
[<00000000c344af7c>] copy_process kernel/fork.c:1800 [inline]
[<00000000c344af7c>] _do_fork+0x121/0x4f0 kernel/fork.c:2369
BUG: memory leak
unreferenced object 0xffff8881065de500 (size 96):
comm "syz-executor073", pid 7254, jiffies 4294950560 (age 24.970s)
hex dump (first 32 bytes):
02 00 00 00 00 00 00 00 e0 8a bb 82 ff ff ff ff ................
00 00 00 00 00 00 00 00 90 76 bb 82 ff ff ff ff .........v......
backtrace:
[<0000000013db61f1>] kmemleak_alloc_recursive
include/linux/kmemleak.h:55 [inline]
[<0000000013db61f1>] slab_post_alloc_hook mm/slab.h:439 [inline]
[<0000000013db61f1>] slab_alloc_node mm/slab.c:3269 [inline]
[<0000000013db61f1>] kmem_cache_alloc_node_trace+0x15b/0x2a0
mm/slab.c:3597
[<000000001a27307d>] __do_kmalloc_node mm/slab.c:3619 [inline]
[<000000001a27307d>] __kmalloc_node+0x38/0x50 mm/slab.c:3627
[<0000000025054add>] kmalloc_node include/linux/slab.h:590 [inline]
[<0000000025054add>] kvmalloc_node+0x4a/0xd0 mm/util.c:431
[<0000000050d1bc00>] kvmalloc include/linux/mm.h:637 [inline]
[<0000000050d1bc00>] kvzalloc include/linux/mm.h:645 [inline]
[<0000000050d1bc00>] allocate_hook_entries_size+0x3b/0x60
net/netfilter/core.c:61
[<00000000e8abe142>] nf_hook_entries_grow+0xae/0x270
net/netfilter/core.c:128
[<000000004b94797c>] __nf_register_net_hook+0x9a/0x170
net/netfilter/core.c:337
[<00000000d1545cbc>] nf_register_net_hook+0x34/0xc0
net/netfilter/core.c:464
[<00000000876c9b55>] nf_register_net_hooks+0x53/0xc0
net/netfilter/core.c:480
[<000000002ea868e0>] __ip_vs_init+0xe8/0x170
net/netfilter/ipvs/ip_vs_core.c:2280
[<000000002eb2d451>] ops_init+0x4c/0x140 net/core/net_namespace.c:130
[<000000000284ec48>] setup_net+0xde/0x230 net/core/net_namespace.c:316
[<00000000a70600fa>] copy_net_ns+0xf0/0x1e0 net/core/net_namespace.c:439
[<00000000ff26c15e>] create_new_namespaces+0x141/0x2a0
kernel/nsproxy.c:107
[<00000000b103dc79>] copy_namespaces+0xa1/0xe0 kernel/nsproxy.c:165
[<000000007cc008a2>] copy_process.part.0+0x11fd/0x2150
kernel/fork.c:2035
[<00000000c344af7c>] copy_process kernel/fork.c:1800 [inline]
[<00000000c344af7c>] _do_fork+0x121/0x4f0 kernel/fork.c:2369
BUG: memory leak
unreferenced object 0xffff888103533c80 (size 96):
comm "syz-executor073", pid 7254, jiffies 4294950626 (age 24.310s)
hex dump (first 32 bytes):
02 00 00 00 00 00 00 00 70 77 bb 82 ff ff ff ff ........pw......
00 00 00 00 00 00 00 00 50 8b bb 82 ff ff ff ff ........P.......
backtrace:
[<0000000013db61f1>] kmemleak_alloc_recursive
include/linux/kmemleak.h:55 [inline]
[<0000000013db61f1>] slab_post_alloc_hook mm/slab.h:439 [inline]
[<0000000013db61f1>] slab_alloc_node mm/slab.c:3269 [inline]
[<0000000013db61f1>] kmem_cache_alloc_node_trace+0x15b/0x2a0
mm/slab.c:3597
[<000000001a27307d>] __do_kmalloc_node mm/slab.c:3619 [inline]
[<000000001a27307d>] __kmalloc_node+0x38/0x50 mm/slab.c:3627
[<0000000025054add>] kmalloc_node include/linux/slab.h:590 [inline]
[<0000000025054add>] kvmalloc_node+0x4a/0xd0 mm/util.c:431
[<0000000050d1bc00>] kvmalloc include/linux/mm.h:637 [inline]
[<0000000050d1bc00>] kvzalloc include/linux/mm.h:645 [inline]
[<0000000050d1bc00>] allocate_hook_entries_size+0x3b/0x60
net/netfilter/core.c:61
[<00000000343067d2>] __nf_hook_entries_try_shrink+0xbd/0x190
net/netfilter/core.c:248
[<0000000004051f14>] __nf_unregister_net_hook+0x12f/0x1b0
net/netfilter/core.c:416
[<00000000f74d14d1>] nf_unregister_net_hook+0x32/0x70
net/netfilter/core.c:431
[<00000000de019d2a>] nf_unregister_net_hooks+0x3d/0x50
net/netfilter/core.c:499
[<00000000fbdf13a9>] selinux_nf_unregister+0x22/0x30
security/selinux/hooks.c:7089
[<00000000ff82a3bf>] ops_exit_list.isra.0+0x4c/0x80
net/core/net_namespace.c:154
[<000000008a424b95>] setup_net+0x14a/0x230 net/core/net_namespace.c:333
[<00000000a70600fa>] copy_net_ns+0xf0/0x1e0 net/core/net_namespace.c:439
[<00000000ff26c15e>] create_new_namespaces+0x141/0x2a0
kernel/nsproxy.c:107
[<00000000b103dc79>] copy_namespaces+0xa1/0xe0 kernel/nsproxy.c:165
[<000000007cc008a2>] copy_process.part.0+0x11fd/0x2150
kernel/fork.c:2035
[<00000000c344af7c>] copy_process kernel/fork.c:1800 [inline]
[<00000000c344af7c>] _do_fork+0x121/0x4f0 kernel/fork.c:2369
BUG: memory leak
unreferenced object 0xffff88810acd8a80 (size 96):
comm "syz-executor073", pid 7254, jiffies 4294950560 (age 26.290s)
hex dump (first 32 bytes):
02 00 00 00 00 00 00 00 50 8b bb 82 ff ff ff ff ........P.......
00 00 00 00 00 00 00 00 00 77 bb 82 ff ff ff ff .........w......
backtrace:
[<0000000013db61f1>] kmemleak_alloc_recursive
include/linux/kmemleak.h:55 [inline]
[<0000000013db61f1>] slab_post_alloc_hook mm/slab.h:439 [inline]
[<0000000013db61f1>] slab_alloc_node mm/slab.c:3269 [inline]
[<0000000013db61f1>] kmem_cache_alloc_node_trace+0x15b/0x2a0
mm/slab.c:3597
[<000000001a27307d>] __do_kmalloc_node mm/slab.c:3619 [inline]
[<000000001a27307d>] __kmalloc_node+0x38/0x50 mm/slab.c:3627
[<0000000025054add>] kmalloc_node include/linux/slab.h:590 [inline]
[<0000000025054add>] kvmalloc_node+0x4a/0xd0 mm/util.c:431
[<0000000050d1bc00>] kvmalloc include/linux/mm.h:637 [inline]
[<0000000050d1bc00>] kvzalloc include/linux/mm.h:645 [inline]
[<0000000050d1bc00>] allocate_hook_entries_size+0x3b/0x60
net/netfilter/core.c:61
[<00000000e8abe142>] nf_hook_entries_grow+0xae/0x270
net/netfilter/core.c:128
[<000000004b94797c>] __nf_register_net_hook+0x9a/0x170
net/netfilter/core.c:337
[<00000000d1545cbc>] nf_register_net_hook+0x34/0xc0
net/netfilter/core.c:464
[<00000000876c9b55>] nf_register_net_hooks+0x53/0xc0
net/netfilter/core.c:480
[<000000002ea868e0>] __ip_vs_init+0xe8/0x170
net/netfilter/ipvs/ip_vs_core.c:2280
[<000000002eb2d451>] ops_init+0x4c/0x140 net/core/net_namespace.c:130
[<000000000284ec48>] setup_net+0xde/0x230 net/core/net_namespace.c:316
[<00000000a70600fa>] copy_net_ns+0xf0/0x1e0 net/core/net_namespace.c:439
[<00000000ff26c15e>] create_new_namespaces+0x141/0x2a0
kernel/nsproxy.c:107
[<00000000b103dc79>] copy_namespaces+0xa1/0xe0 kernel/nsproxy.c:165
[<000000007cc008a2>] copy_process.part.0+0x11fd/0x2150
kernel/fork.c:2035
[<00000000c344af7c>] copy_process kernel/fork.c:1800 [inline]
[<00000000c344af7c>] _do_fork+0x121/0x4f0 kernel/fork.c:2369
BUG: memory leak
unreferenced object 0xffff8881065de500 (size 96):
comm "syz-executor073", pid 7254, jiffies 4294950560 (age 26.290s)
hex dump (first 32 bytes):
02 00 00 00 00 00 00 00 e0 8a bb 82 ff ff ff ff ................
00 00 00 00 00 00 00 00 90 76 bb 82 ff ff ff ff .........v......
backtrace:
[<0000000013db61f1>] kmemleak_alloc_recursive
include/linux/kmemleak.h:55 [inline]
[<0000000013db61f1>] slab_post_alloc_hook mm/slab.h:439 [inline]
[<0000000013db61f1>] slab_alloc_node mm/slab.c:3269 [inline]
[<0000000013db61f1>] kmem_cache_alloc_node_trace+0x15b/0x2a0
mm/slab.c:3597
[<000000001a27307d>] __do_kmalloc_node mm/slab.c:3619 [inline]
[<000000001a27307d>] __kmalloc_node+0x38/0x50 mm/slab.c:3627
[<0000000025054add>] kmalloc_node include/linux/slab.h:590 [inline]
[<0000000025054add>] kvmalloc_node+0x4a/0xd0 mm/util.c:431
[<0000000050d1bc00>] kvmalloc include/linux/mm.h:637 [inline]
[<0000000050d1bc00>] kvzalloc include/linux/mm.h:645 [inline]
[<0000000050d1bc00>] allocate_hook_entries_size+0x3b/0x60
net/netfilter/core.c:61
[<00000000e8abe142>] nf_hook_entries_grow+0xae/0x270
net/netfilter/core.c:128
[<000000004b94797c>] __nf_register_net_hook+0x9a/0x170
net/netfilter/core.c:337
[<00000000d1545cbc>] nf_register_net_hook+0x34/0xc0
net/netfilter/core.c:464
[<00000000876c9b55>] nf_register_net_hooks+0x53/0xc0
net/netfilter/core.c:480
[<000000002ea868e0>] __ip_vs_init+0xe8/0x170
net/netfilter/ipvs/ip_vs_core.c:2280
[<000000002eb2d451>] ops_init+0x4c/0x140 net/core/net_namespace.c:130
[<000000000284ec48>] setup_net+0xde/0x230 net/core/net_namespace.c:316
[<00000000a70600fa>] copy_net_ns+0xf0/0x1e0 net/core/net_namespace.c:439
[<00000000ff26c15e>] create_new_namespaces+0x141/0x2a0
kernel/nsproxy.c:107
[<00000000b103dc79>] copy_namespaces+0xa1/0xe0 kernel/nsproxy.c:165
[<000000007cc008a2>] copy_process.part.0+0x11fd/0x2150
kernel/fork.c:2035
[<00000000c344af7c>] copy_process kernel/fork.c:1800 [inline]
[<00000000c344af7c>] _do_fork+0x121/0x4f0 kernel/fork.c:2369
BUG: memory leak
unreferenced object 0xffff888103533c80 (size 96):
comm "syz-executor073", pid 7254, jiffies 4294950626 (age 25.640s)
hex dump (first 32 bytes):
02 00 00 00 00 00 00 00 70 77 bb 82 ff ff ff ff ........pw......
00 00 00 00 00 00 00 00 50 8b bb 82 ff ff ff ff ........P.......
backtrace:
[<0000000013db61f1>] kmemleak_alloc_recursive
include/linux/kmemleak.h:55 [inline]
[<0000000013db61f1>] slab_post_alloc_hook mm/slab.h:439 [inline]
[<0000000013db61f1>] slab_alloc_node mm/slab.c:3269 [inline]
[<0000000013db61f1>] kmem_cache_alloc_node_trace+0x15b/0x2a0
mm/slab.c:3597
[<000000001a27307d>] __do_kmalloc_node mm/slab.c:3619 [inline]
[<000000001a27307d>] __kmalloc_node+0x38/0x50 mm/slab.c:3627
[<0000000025054add>] kmalloc_node include/linux/slab.h:590 [inline]
[<0000000025054add>] kvmalloc_node+0x4a/0xd0 mm/util.c:431
[<0000000050d1bc00>] kvmalloc include/linux/mm.h:637 [inline]
[<0000000050d1bc00>] kvzalloc include/linux/mm.h:645 [inline]
[<0000000050d1bc00>] allocate_hook_entries_size+0x3b/0x60
net/netfilter/core.c:61
[<00000000343067d2>] __nf_hook_entries_try_shrink+0xbd/0x190
net/netfilter/core.c:248
[<0000000004051f14>] __nf_unregister_net_hook+0x12f/0x1b0
net/netfilter/core.c:416
[<00000000f74d14d1>] nf_unregister_net_hook+0x32/0x70
net/netfilter/core.c:431
[<00000000de019d2a>] nf_unregister_net_hooks+0x3d/0x50
net/netfilter/core.c:499
[<00000000fbdf13a9>] selinux_nf_unregister+0x22/0x30
security/selinux/hooks.c:7089
[<00000000ff82a3bf>] ops_exit_list.isra.0+0x4c/0x80
net/core/net_namespace.c:154
[<000000008a424b95>] setup_net+0x14a/0x230 net/core/net_namespace.c:333
[<00000000a70600fa>] copy_net_ns+0xf0/0x1e0 net/core/net_namespace.c:439
[<00000000ff26c15e>] create_new_namespaces+0x141/0x2a0
kernel/nsproxy.c:107
[<00000000b103dc79>] copy_namespaces+0xa1/0xe0 kernel/nsproxy.c:165
[<000000007cc008a2>] copy_process.part.0+0x11fd/0x2150
kernel/fork.c:2035
[<00000000c344af7c>] copy_process kernel/fork.c:1800 [inline]
[<00000000c344af7c>] _do_fork+0x121/0x4f0 kernel/fork.c:2369
executing program
executing program
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at [email protected].
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
Hello,
On Mon, 3 Jun 2019, syzbot wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: 3ab4436f Merge tag 'nfsd-5.2-1' of git://linux-nfs.org/~bf..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=15feaf82a00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=50393f7bfe444ff6
> dashboard link: https://syzkaller.appspot.com/bug?extid=722da59ccb264bc19910
> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12f02772a00000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1657b80ea00000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: [email protected]
>
> 035][ T7273] IPVS: ftp: loaded support on port[0] = 21
> BUG: memory leak
> unreferenced object 0xffff88810acd8a80 (size 96):
> comm "syz-executor073", pid 7254, jiffies 4294950560 (age 22.250s)
> hex dump (first 32 bytes):
> 02 00 00 00 00 00 00 00 50 8b bb 82 ff ff ff ff ........P.......
> 00 00 00 00 00 00 00 00 00 77 bb 82 ff ff ff ff .........w......
> backtrace:
> [<0000000013db61f1>] kmemleak_alloc_recursive include/linux/kmemleak.h:55
> [inline]
> [<0000000013db61f1>] slab_post_alloc_hook mm/slab.h:439 [inline]
> [<0000000013db61f1>] slab_alloc_node mm/slab.c:3269 [inline]
> [<0000000013db61f1>] kmem_cache_alloc_node_trace+0x15b/0x2a0 mm/slab.c:3597
> [<000000001a27307d>] __do_kmalloc_node mm/slab.c:3619 [inline]
> [<000000001a27307d>] __kmalloc_node+0x38/0x50 mm/slab.c:3627
> [<0000000025054add>] kmalloc_node include/linux/slab.h:590 [inline]
> [<0000000025054add>] kvmalloc_node+0x4a/0xd0 mm/util.c:431
> [<0000000050d1bc00>] kvmalloc include/linux/mm.h:637 [inline]
> [<0000000050d1bc00>] kvzalloc include/linux/mm.h:645 [inline]
> [<0000000050d1bc00>] allocate_hook_entries_size+0x3b/0x60
> net/netfilter/core.c:61
> [<00000000e8abe142>] nf_hook_entries_grow+0xae/0x270
> net/netfilter/core.c:128
> [<000000004b94797c>] __nf_register_net_hook+0x9a/0x170
> net/netfilter/core.c:337
> [<00000000d1545cbc>] nf_register_net_hook+0x34/0xc0
> net/netfilter/core.c:464
> [<00000000876c9b55>] nf_register_net_hooks+0x53/0xc0
> net/netfilter/core.c:480
> [<000000002ea868e0>] __ip_vs_init+0xe8/0x170
> net/netfilter/ipvs/ip_vs_core.c:2280
After commit "ipvs: Fix use-after-free in ip_vs_in" we planned
to call nf_register_net_hooks() only when rule is created but this
is net-next material and we should not leave leak in the error path.
I'll post a patch that adds .init handler for ipvs_core_dev_ops, so
that nf_register_net_hooks() is called there.
> ---
> This bug is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at [email protected].
>
> syzbot will keep track of this bug report. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> syzbot can test patches for this bug, for details see:
> https://goo.gl/tpsmEJ#testing-patches
Regards
--
Julian Anastasov <[email protected]>