INFO: task syz-executor.2:23198 blocked for more than 143 seconds.
Not tainted 5.15.0-next-20211103-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27448 pid:23198 ppid: 28300 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4984 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6265
schedule+0xd2/0x260 kernel/sched/core.c:6338
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
io_wq_exit_workers fs/io-wq.c:1204 [inline]
io_wq_put_and_exit+0x33a/0xb70 fs/io-wq.c:1239
io_uring_clean_tctx fs/io_uring.c:9770 [inline]
io_uring_cancel_generic+0x61d/0x690 fs/io_uring.c:9851
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/0x2220 kernel/signal.c:2830
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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f43c1f9cae9
RSP: 002b:00007f43bf512188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000001000 RBX: 00007f43c20aff60 RCX: 00007f43c1f9cae9
RDX: 0000000000000000 RSI: 000000000000688c RDI: 0000000000000004
RBP: 00007f43c1ff6f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc86377f5f R14: 00007f43bf512300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by in:imklog/6225:
#0: ffff8880779d7c70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
3 locks held by kworker/u4:32/25200:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-next-20211103-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:254 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:339
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: 2967 Comm: systemd-journal Not tainted 5.15.0-next-20211103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:164 [inline]
RIP: 0010:unwind_next_frame+0x2d5/0x1ce0 arch/x86/kernel/unwind_orc.c:443
Code: 89 54 24 38 48 89 74 24 30 89 4c 24 28 44 89 5c 24 20 e8 ee 71 8a 00 48 8b 54 24 38 48 8b 74 24 30 8b 4c 24 28 44 8b 5c 24 20 <8b> 14 95 8c ea a8 8e 89 c8 48 8d 3c 40 4c 8d 84 3f a8 2c 06 8e 83
RSP: 0018:ffffc90001d5f870 EFLAGS: 00000246
RAX: 0000000000000003 RBX: 1ffff920003abf16 RCX: 000000000002d07b
RDX: 000000000000be6f RSI: 000000000000be6e RDI: ffffffff8eabe448
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: fffff520003abf34 R11: 000000000008808a R12: ffffc90001d5f990
R13: ffffc90001d5f97d R14: ffffc90001d5f948 R15: ffffffff81be6efd
FS: 00007fb538da78c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb533dc0000 CR3: 0000000018d89000 CR4: 00000000003506e0
Call Trace:
arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
kasan_set_track+0x21/0x30 mm/kasan/common.c:46
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free mm/kasan/common.c:328 [inline]
__kasan_slab_free+0xff/0x130 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:1723 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1749
slab_free mm/slub.c:3513 [inline]
kmem_cache_free+0x92/0x5e0 mm/slub.c:3529
putname fs/namei.c:270 [inline]
putname+0xfe/0x140 fs/namei.c:256
do_sys_openat2+0x153/0x4d0 fs/open.c:1221
do_sys_open fs/open.c:1228 [inline]
__do_sys_open fs/open.c:1236 [inline]
__se_sys_open fs/open.c:1232 [inline]
__x64_sys_open+0x119/0x1c0 fs/open.c:1232
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: 0033:0x7fb538336840
Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24
RSP: 002b:00007fff5339f8e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fff5339fbf0 RCX: 00007fb538336840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 00005576cbef5be0
RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00005576cbee8040 R14: 00007fff5339fbb0 R15: 00005576cbef5a00
----------------
Code disassembly (best guess):
0: 89 54 24 38 mov %edx,0x38(%rsp)
4: 48 89 74 24 30 mov %rsi,0x30(%rsp)
9: 89 4c 24 28 mov %ecx,0x28(%rsp)
d: 44 89 5c 24 20 mov %r11d,0x20(%rsp)
12: e8 ee 71 8a 00 callq 0x8a7205
17: 48 8b 54 24 38 mov 0x38(%rsp),%rdx
1c: 48 8b 74 24 30 mov 0x30(%rsp),%rsi
21: 8b 4c 24 28 mov 0x28(%rsp),%ecx
25: 44 8b 5c 24 20 mov 0x20(%rsp),%r11d
* 2a: 8b 14 95 8c ea a8 8e mov -0x71571574(,%rdx,4),%edx <-- trapping instruction
31: 89 c8 mov %ecx,%eax
33: 48 8d 3c 40 lea (%rax,%rax,2),%rdi
37: 4c 8d 84 3f a8 2c 06 lea -0x71f9d358(%rdi,%rdi,1),%r8
3e: 8e
3f: 83 .byte 0x83