INFO: task syz-executor.1:14816 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:22896 pid:14816 ppid: 7715 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
io_uring_cancel_generic+0x5b3/0x661 fs/io_uring.c:9846
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+0x1740/0x2120 kernel/signal.c:2830
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: 0033:0x7f6da9a24ae9
RSP: 002b:00007f6da6f9a218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f6da9b37f68 RCX: 00007f6da9a24ae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6da9b37f68
RBP: 00007f6da9b37f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6da9b37f6c
R13: 00007fffcecd324f R14: 00007f6da6f9a300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cd1db00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by systemd-udevd/2971:
1 lock held by in:imklog/6179:
#0: ffff88801f8dd4f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc1-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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6489 Comm: syz-fuzzer Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_preemption_disabled+0x22/0x1c0 lib/smp_processor_id.c:13
Code: 1f 84 00 00 00 00 00 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 10 49 89 f6 49 89 ff 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 <0f> 1f 44 00 00 65 8b 1d ba 29 da 75 65 8b 2d 23 84 da 75 89 ee 81
RSP: 0018:ffffc9000d1575f0 EFLAGS: 00000086
RAX: 4cacfdff06af7600 RBX: 0000000000000000 RCX: 0000000080000003
RDX: 0000000000000000 RSI: ffffffff8a8f16c0 RDI: ffffffff8af54760
RBP: 0000000000000002 R08: dffffc0000000000 R09: fffffbfff1c3d216
R10: fffffbfff1c3d216 R11: 0000000000000000 R12: 0000000000000046
R13: ffff88807a255700 R14: ffffffff8a8f16c0 R15: ffffffff8af54760
FS: 000000c00002e090(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f298c24f018 CR3: 000000001dcc2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:438 [inline]
lock_is_held_type+0x109/0x190 kernel/locking/lockdep.c:5681
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x89/0x130 kernel/rcu/update.c:125
trace_lock_release+0x4f/0x150 include/trace/events/lock.h:58
lock_release+0x82/0x810 kernel/locking/lockdep.c:5648
rcu_read_unlock include/linux/rcupdate.h:721 [inline]
cgroup_account_cputime include/linux/cgroup.h:798 [inline]
update_curr+0x58b/0xd40 kernel/sched/fair.c:877
dequeue_entity+0x27/0xd90 kernel/sched/fair.c:4337
dequeue_task_fair+0x289/0x1360 kernel/sched/fair.c:5688
dequeue_task kernel/sched/core.c:2019 [inline]
deactivate_task kernel/sched/core.c:2033 [inline]
__schedule+0x63c/0x1460 kernel/sched/core.c:6207
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
freezable_schedule include/linux/freezer.h:172 [inline]
do_nanosleep+0x1ca/0x7a0 kernel/time/hrtimer.c:2044
hrtimer_nanosleep+0x24d/0x490 kernel/time/hrtimer.c:2097
__do_sys_nanosleep kernel/time/hrtimer.c:2131 [inline]
__se_sys_nanosleep kernel/time/hrtimer.c:2118 [inline]
__x64_sys_nanosleep+0x237/0x2a0 kernel/time/hrtimer.c:2118
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: 0033:0x46db5d
Code: 8b 44 24 20 b9 40 42 0f 00 f7 f1 48 89 04 24 b8 e8 03 00 00 f7 e2 48 89 44 24 08 48 89 e7 be 00 00 00 00 b8 23 00 00 00 0f 05 <48> 8b 6c 24 10 48 83 c4 18 c3 cc cc cc cc cc cc cc cc cc cc cc cc
RSP: 002b:000000c00003df18 EFLAGS: 00000202 ORIG_RAX: 0000000000000023
RAX: ffffffffffffffda RBX: 0000000000000014 RCX: 000000000046db5d
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000c00003df18
RBP: 000000c00003df28 R08: 00007ffeebbac080 R09: 0000000000000010
R10: 00007ffeebbac0b8 R11: 0000000000000202 R12: 000000000043b6e0
R13: 0000000000000000 R14: 00000000008db864 R15: 0000000000000000
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 84 00 test %al,(%rax)
2: 00 00 add %al,(%rax)
4: 00 00 add %al,(%rax)
6: 90 nop
7: 55 push %rbp
8: 41 57 push %r15
a: 41 56 push %r14
c: 41 55 push %r13
e: 41 54 push %r12
10: 53 push %rbx
11: 48 83 ec 10 sub $0x10,%rsp
15: 49 89 f6 mov %rsi,%r14
18: 49 89 ff mov %rdi,%r15
1b: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
22: 00 00
24: 48 89 44 24 08 mov %rax,0x8(%rsp)
* 29: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction
2e: 65 8b 1d ba 29 da 75 mov %gs:0x75da29ba(%rip),%ebx # 0x75da29ef
35: 65 8b 2d 23 84 da 75 mov %gs:0x75da8423(%rip),%ebp # 0x75da845f
3c: 89 ee mov %ebp,%esi
3e: 81 .byte 0x81