Hello,
when using Healer to fuzz the latest Linux Kernel, the following crash
was triggered on:
HEAD commit: e8f897f4afef0031fe618a8e94127a0934896aba (tag: v6.8)
git tree: upstream
console output: https://pastebin.com/raw/KYUZrCEa
kernel config: https://pastebin.com/raw/Qa9fj2Ev
C reproducer: https://pastebin.com/raw/pW0J23UU
Syzlang reproducer: https://pastebin.com/raw/8bJrsXLY
If you fix this issue, please add the following tag to the commit:
Reported-by: Qiang Zhang <[email protected]>
----------------------------------------------------------
general protection fault, probably for non-canonical address
0xdffffc0000000000: 0000 [#6] PREEMPT SMP KASAN NOPTI
RIP: 0010:__wake_up_common+0x6f/0x1d0 kernel/sched/wait.c:85
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
Code: 00 00 48 8b 5b 08 4c 8d 6b e8 48 3b 1c 24 0f 84 07 01 00 00 e8
f2 ba 1d 00 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c
02 00 0f 85 2d 01 00 00 48 bd 00 00 00 00 00 fc ff df 48 8b
CPU: 2 PID: 137 Comm: systemd-udevd Tainted: G D 6.8.0 #1
RSP: 0018:ffff88810409fb40 EFLAGS: 00010056
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8268aa3e
RIP: 0010:__wake_up_common+0x6f/0x1d0 kernel/sched/wait.c:85
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888100c9c320
Code: 00 00 48 8b 5b 08 4c 8d 6b e8 48 3b 1c 24 0f 84 07 01 00 00 e8
f2 ba 1d 00 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c
02 00 0f 85 2d 01 00 00 48 bd 00 00 00 00 00 fc ff df 48 8b
RBP: ffff888100c9c320 R08: 0000000000000000 R09: ffffed1020813f63
RSP: 0018:ffff888103537b40 EFLAGS: 00010056
R10: 0000000000000001 R11: ffff88811b238a20 R12: 0000000000000001
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8268aa3e
R13: ffffffffffffffe8 R14: 0000000000000000 R15: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888100c99320
FS: 0000000000000000(0000) GS:ffff88811af00000(0000) knlGS:0000000000000000
RBP: ffff888100c99320 R08: 0000000000000000 R09: ffffed10206a6f63
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
R10: 0000000000000001 R11: ffff88811b038a20 R12: 0000000000000001
CR2: 0000562ccdf55168 CR3: 00000000856aa006 CR4: 0000000000770ef0
R13: ffffffffffffffe8 R14: 0000000000000000 R15: 0000000000000000
PKRU: 55555554
FS: 0000000000000000(0000) GS:ffff88811b000000(0000) knlGS:0000000000000000
note: systemd-udevd[138] exited with irqs disabled
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
note: systemd-udevd[138] exited with preempt_count 1
CR2: 0000562ccdf55168 CR3: 0000000104a44004 CR4: 0000000000770ef0
Fixing recursive fault but reboot is needed!
PKRU: 55555554
Call Trace:
<TASK>
__wake_up_common_lock kernel/sched/wait.c:106 [inline]
__wake_up+0x39/0x60 kernel/sched/wait.c:127
netlink_release+0x86a/0x1610 net/netlink/af_netlink.c:785
__sock_release+0xb3/0x270 net/socket.c:659
sock_close+0x19/0x30 net/socket.c:1421
__fput+0x265/0xb70 fs/file_table.c:376
task_work_run+0x16d/0x250 kernel/task_work.c:180
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa2d/0x2670 kernel/exit.c:871
do_group_exit+0xc8/0x280 kernel/exit.c:1020
__do_sys_exit_group kernel/exit.c:1031 [inline]
__se_sys_exit_group kernel/exit.c:1029 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xb3/0x1b0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f15f7c24bd9
Code: Unable to access opcode bytes at 0x7f15f7c24baf.
RSP: 002b:00007ffdba06ac38 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f15f7c24bd9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 0000562ccd6f6270 R08: fffffffffffffe00 R09: 0000000000000004
R10: 0000000000000018 R11: 0000000000000202 R12: 0000562ccdf68ec0
R13: 0000562ccdf74f20 R14: 00007ffdba06acb0 R15: 0000562ccdf69720
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__wake_up_common+0x6f/0x1d0 kernel/sched/wait.c:85
Code: 00 00 48 8b 5b 08 4c 8d 6b e8 48 3b 1c 24 0f 84 07 01 00 00 e8
f2 ba 1d 00 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c
02 00 0f 85 2d 01 00 00 48 bd 00 00 00 00 00 fc ff df 48 8b
RSP: 0018:ffff88810409fb40 EFLAGS: 00010056
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8268aa3e
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888100c9c320
RBP: ffff888100c9c320 R08: 0000000000000000 R09: ffffed1020813f63
R10: 0000000000000001 R11: ffff88811b238a20 R12: 0000000000000001
R13: ffffffffffffffe8 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88811b000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562ccdf55168 CR3: 0000000104a44004 CR4: 0000000000770ef0
PKRU: 55555554
note: systemd-udevd[137] exited with irqs disabled
note: systemd-udevd[137] exited with preempt_count 1
Fixing recursive fault but reboot is needed!
BUG: scheduling while atomic: systemd-udevd/137/0x00000000
Modules linked in:
CPU: 2 PID: 137 Comm: systemd-udevd Tainted: G D 6.8.0 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x72/0xa0 lib/dump_stack.c:106
__schedule_bug+0xc1/0x100 kernel/sched/core.c:5943
schedule_debug kernel/sched/core.c:5970 [inline]
__schedule+0x1bf3/0x2460 kernel/sched/core.c:6620
do_task_dead+0xa4/0xc0 kernel/sched/core.c:6743
make_task_dead+0x378/0x3c0 kernel/exit.c:979
rewind_stack_and_make_dead+0x17/0x20 arch/x86/entry/entry_64.S:1494
RIP: 0033:0x7f15f7c24bd9
Code: Unable to access opcode bytes at 0x7f15f7c24baf.
RSP: 002b:00007ffdba06ac38 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f15f7c24bd9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 0000562ccd6f6270 R08: fffffffffffffe00 R09: 0000000000000004
R10: 0000000000000018 R11: 0000000000000202 R12: 0000562ccdf68ec0
R13: 0000562ccdf74f20 R14: 00007ffdba06acb0 R15: 0000562ccdf69720
</TASK>
ata1: found unknown device (class 0)
program syz-executor124 is using a deprecated SCSI ioctl, please
convert it to SG_IO
ata1: found unknown device (class 0)
program syz-executor124 is using a deprecated SCSI ioctl, please
convert it to SG_IO
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 48 8b 5b 08 mov 0x8(%rbx),%rbx
6: 4c 8d 6b e8 lea -0x18(%rbx),%r13
a: 48 3b 1c 24 cmp (%rsp),%rbx
e: 0f 84 07 01 00 00 je 0x11b
14: e8 f2 ba 1d 00 call 0x1dbb0b
19: 48 89 da mov %rbx,%rdx
1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
23: fc ff df
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 2d 01 00 00 jne 0x161
34: 48 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%rbp
3b: fc ff df
3e: 48 rex.W
3f: 8b .byte 0x8b