INFO: task syz-executor.0:4249 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.0 state:D stack:24848 pid: 4249 ppid: 6477 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6250
schedule+0x12b/0x1f0 kernel/sched/core.c:6323
io_uring_cancel_generic+0x5b3/0x661 fs/io_uring.c:9850
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x281/0x24f0 kernel/exit.c:787
do_group_exit+0x168/0x2d0 kernel/exit.c:929
get_signal+0x16b0/0x2090 kernel/signal.c:2820
arch_do_signal_or_restart+0x9c/0x730 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+0x191/0x220 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3a4b722ae9
RSP: 002b:00007f3a48c98188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000304 RBX: 00007f3a4b835f60 RCX: 00007f3a4b722ae9
RDX: 0000000000000000 RSI: 0000000000000304 RDI: 0000000000000003
RBP: 00007f3a4b77cf25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff40047fff R14: 00007f3a48c98300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1d8c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
=============================================
NMI backtrace for cpu 1
CPU: 1 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+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x16a/0x280 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+0xc82/0xcd0 kernel/hung_task.c:295
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2936 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:preempt_latency_start kernel/sched/core.c:5409 [inline]
RIP: 0010:preempt_count_add+0x55/0x130 kernel/sched/core.c:5435
Code: b5 00 00 00 83 3d 8a 9e 5e 0f 00 75 11 65 8b 05 29 85 a8 7e 0f b6 c0 3d f5 00 00 00 73 5a 65 8b 05 18 85 a8 7e 25 ff ff ff 7f <39> d8 75 44 4c 8b 74 24 18 4c 89 f7 e8 2a 72 0d 00 85 c0 74 0a 45
RSP: 0018:ffffc90001b1f8a0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff90b88903
RDX: ffffc90001b1ff20 RSI: ffffffff89ffcaf4 RDI: 0000000000000001
RBP: 1ffff92000363f30 R08: 0000000000000005 R09: ffffc90001b1fa70
R10: fffff52000363f3c R11: 0000000000000000 R12: ffffc90001b1f9b8
R13: ffffc90001b1f980 R14: ffffffff89ffcaf4 R15: dffffc0000000000
FS: 00007f15f89ab8c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f15f459f000 CR3: 000000001fac0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0xa9/0x1fa0 arch/x86/kernel/unwind_orc.c:428
arch_stack_walk+0x112/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:121
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0xb2/0xe0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:259 [inline]
slab_post_alloc_hook mm/slab.h:519 [inline]
slab_alloc_node mm/slub.c:3213 [inline]
slab_alloc mm/slub.c:3221 [inline]
kmem_cache_alloc+0x1c1/0x300 mm/slub.c:3226
getname_flags+0xba/0x650 fs/namei.c:138
user_path_at_empty+0x2a/0x1a0 fs/namei.c:2800
user_path_at include/linux/namei.h:57 [inline]
do_faccessat+0x43f/0x940 fs/open.c:421
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f15f7c669c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffe677621a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffe677651d0 RCX: 00007f15f7c669c7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055f29c0c69a3
RBP: 00007ffe677622f0 R08: 000055f29c0bc3e5 R09: 0000000000000018
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 000055f29d89b8a0 R15: 00007ffe677627e0
----------------
Code disassembly (best guess):
0: b5 00 mov $0x0,%ch
2: 00 00 add %al,(%rax)
4: 83 3d 8a 9e 5e 0f 00 cmpl $0x0,0xf5e9e8a(%rip) # 0xf5e9e95
b: 75 11 jne 0x1e
d: 65 8b 05 29 85 a8 7e mov %gs:0x7ea88529(%rip),%eax # 0x7ea8853d
14: 0f b6 c0 movzbl %al,%eax
17: 3d f5 00 00 00 cmp $0xf5,%eax
1c: 73 5a jae 0x78
1e: 65 8b 05 18 85 a8 7e mov %gs:0x7ea88518(%rip),%eax # 0x7ea8853d
25: 25 ff ff ff 7f and $0x7fffffff,%eax
* 2a: 39 d8 cmp %ebx,%eax <-- trapping instruction
2c: 75 44 jne 0x72
2e: 4c 8b 74 24 18 mov 0x18(%rsp),%r14
33: 4c 89 f7 mov %r14,%rdi
36: e8 2a 72 0d 00 callq 0xd7265
3b: 85 c0 test %eax,%eax
3d: 74 0a je 0x49
3f: 45 rex.RB