INFO: task syz-executor.2:13964 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.2 state:D stack:28120 pid:13964 ppid: 6698 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_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6f14547
RSP: 002b:00000000f450e67c EFLAGS: 00000296 ORIG_RAX: 00000000000000f0
RAX: 00000000000000f0 RBX: 00000000f7070fa8 RCX: 0000000000000080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000f7070fac
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:
1 lock held by khungtaskd/27:
#0: ffffffff8b983960 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
1 lock held by in:imklog/6176:
#0: ffff888072c5a370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
=============================================
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: 9737 Comm: kworker/u4:9 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:lookup_object lib/debugobjects.c:198 [inline]
RIP: 0010:__debug_object_init+0xef/0xd10 lib/debugobjects.c:571
Code: 48 8b ab 00 57 41 90 31 c0 48 85 ed 74 46 48 ba 00 00 00 00 00 fc ff df 48 8d 7d 18 83 c0 01 48 89 f9 48 c1 e9 03 80 3c 11 00 <0f> 85 df 07 00 00 4c 3b 65 18 0f 84 69 03 00 00 48 89 e9 48 c1 e9
RSP: 0018:ffffc90017117a58 EFLAGS: 00000046
RAX: 0000000000000004 RBX: 00000000000cda58 RCX: 1ffff1100397a3ca
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff88801cbd1e50
RBP: ffff88801cbd1e38 R08: 0000000000000202 R09: 0000000000000003
R10: fffff52002e22f39 R11: 0000000000000000 R12: ffffc90017117b88
R13: 1ffff92002e22f5a R14: ffffffff904e3160 R15: ffffffff904e3158
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff4bc240000 CR3: 000000000b68e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
init_timer_on_stack_key kernel/time/timer.c:752 [inline]
schedule_timeout+0xf2/0x2a0 kernel/time/timer.c:1879
toggle_allocation_gate mm/kfence/core.c:633 [inline]
toggle_allocation_gate+0x305/0x390 mm/kfence/core.c:618
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 48 8b ab 00 57 41 90 mov -0x6fbea900(%rbx),%rbp
7: 31 c0 xor %eax,%eax
9: 48 85 ed test %rbp,%rbp
c: 74 46 je 0x54
e: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
15: fc ff df
18: 48 8d 7d 18 lea 0x18(%rbp),%rdi
1c: 83 c0 01 add $0x1,%eax
1f: 48 89 f9 mov %rdi,%rcx
22: 48 c1 e9 03 shr $0x3,%rcx
26: 80 3c 11 00 cmpb $0x0,(%rcx,%rdx,1)
* 2a: 0f 85 df 07 00 00 jne 0x80f <-- trapping instruction
30: 4c 3b 65 18 cmp 0x18(%rbp),%r12
34: 0f 84 69 03 00 00 je 0x3a3
3a: 48 89 e9 mov %rbp,%rcx
3d: 48 rex.W
3e: c1 .byte 0xc1
3f: e9 .byte 0xe9