INFO: task syz-executor.4:20395 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27752 pid:20395 ppid: 7027 flags:0x20024004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9850
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x60c/0x2b40 kernel/exit.c:787
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x21d0 kernel/signal.c:2820
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_int80_syscall_32+0x53/0x90 arch/x86/entry/common.c:135
entry_INT80_compat+0x71/0x76 arch/x86/entry/entry_64_compat.S:413
RIP: 0023:0xf6e74549
RSP: 002b:00000000f446e67c EFLAGS: 00000296 ORIG_RAX: 00000000000000f0
RAX: 0000000000000000 RBX: 00000000f6fd0fa8 RCX: 0000000000000080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000f6fd0fac
RBP: 0000000000000081 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
4 locks held by kworker/u4:0/8:
1 lock held by khungtaskd/27:
#0: ffffffff8b983a20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6461
1 lock held by in:imklog/6175:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2930 Comm: systemd-journal Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_kcov_mode+0x2e/0x40 kernel/kcov.c:174
Code: b5 8a 7e 89 c2 81 e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b 96 a4 15 00 00 85 d2 74 0b 8b 86 80 15 00 00 39 f8 <0f> 94 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 31 c0 65 8b
RSP: 0018:ffffc90001b3fe10 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff88807b238000 RDI: 0000000000000003
RBP: 0000000000000001 R08: ffffffff899977a0 R09: ffffffff81c731c8
R10: 0000000000000003 R11: 0000000000000000 R12: ffff88807b238000
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8d6fe4c8
FS: 00007fba16c728c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fba141f7000 CR3: 0000000021afd000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
write_comp_data kernel/kcov.c:218 [inline]
__sanitizer_cov_trace_switch+0x63/0xf0 kernel/kcov.c:320
__check_object_size mm/usercopy.c:269 [inline]
__check_object_size+0xa8/0x3f0 mm/usercopy.c:256
check_object_size include/linux/thread_info.h:185 [inline]
strncpy_from_user+0xaa/0x3e0 lib/strncpy_from_user.c:137
getname_flags.part.0+0x95/0x4f0 fs/namei.c:149
getname_flags include/linux/audit.h:323 [inline]
getname fs/namei.c:217 [inline]
__do_sys_mkdir fs/namei.c:3929 [inline]
__se_sys_mkdir fs/namei.c:3927 [inline]
__x64_sys_mkdir+0xda/0x140 fs/namei.c:3927
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fba15f2d687
Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffe8ed68258 EFLAGS: 00000293 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ffe8ed6b170 RCX: 00007fba15f2d687
RDX: 00007fba1699ea00 RSI: 00000000000001ed RDI: 000055fc3427b8a0
RBP: 00007ffe8ed68290 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffe8ed6b170 R15: 00007ffe8ed68780
----------------
Code disassembly (best guess):
0: b5 8a mov $0x8a,%ch
2: 7e 89 jle 0xffffff8d
4: c2 81 e2 retq $0xe281
7: 00 01 add %al,(%rcx)
9: 00 00 add %al,(%rax)
b: a9 00 01 ff 00 test $0xff0100,%eax
10: 74 10 je 0x22
12: 31 c0 xor %eax,%eax
14: 85 d2 test %edx,%edx
16: 74 15 je 0x2d
18: 8b 96 a4 15 00 00 mov 0x15a4(%rsi),%edx
1e: 85 d2 test %edx,%edx
20: 74 0b je 0x2d
22: 8b 86 80 15 00 00 mov 0x1580(%rsi),%eax
28: 39 f8 cmp %edi,%eax
* 2a: 0f 94 c0 sete %al <-- trapping instruction
2d: c3 retq
2e: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
35: 00 00 00 00
39: 0f 1f 00 nopl (%rax)
3c: 31 c0 xor %eax,%eax
3e: 65 gs
3f: 8b .byte 0x8b