INFO: task syz-executor.4:4463 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-next-20211210-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:26552 pid: 4463 ppid: 3639 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4d90 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9967
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x60c/0x2c20 kernel/exit.c:787
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x34c/0x28b0 kernel/signal.c:2859
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: 0033:0x7f409adcae99
RSP: 002b:00007f4099740218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f409aeddf68 RCX: 00007f409adcae99
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f409aeddf68
RBP: 00007f409aeddf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f409aeddf6c
R13: 00007fff6dd10bcf R14: 00007f4099740300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by kworker/u4:3/90:
2 locks held by getty/3285:
#0: ffff88807f092098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b932e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc4-next-20211210-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:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:256 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:413
kthread+0x405/0x4f0 kernel/kthread.c:345
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: 90 Comm: kworker/u4:3 Not tainted 5.16.0-rc4-next-20211210-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: phy4 ieee80211_iface_work
RIP: 0010:lock_release+0x57/0x720 kernel/locking/lockdep.c:5647
Code: b3 8a b5 41 48 c1 ed 03 48 c7 44 24 18 70 b6 38 8b 48 01 e8 48 c7 44 24 20 80 e6 5c 81 c7 00 f1 f1 f1 f1 c7 40 04 f1 f1 04 f2 40 08 04 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 24 88 00
RSP: 0018:ffffc90001d2fc58 EFLAGS: 00000286
RAX: fffff520003a5f8d RBX: 0000000000000000 RCX: 0000000000000000
RDX: 1ffff1100f5ae401 RSI: ffffffff814c55a3 RDI: ffff888075894938
RBP: 1ffff920003a5f8d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888075894938
R13: ffff888018d19858 R14: ffff88823bc24000 R15: ffff888010c69800
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056183e745600 CR3: 0000000023bcc000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
process_one_work+0xa69/0x1680 kernel/workqueue.c:2314
worker_thread+0x652/0x11c0 kernel/workqueue.c:2454
kthread+0x405/0x4f0 kernel/kthread.c:345
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: b3 8a mov $0x8a,%bl
2: b5 41 mov $0x41,%ch
4: 48 c1 ed 03 shr $0x3,%rbp
8: 48 c7 44 24 18 70 b6 movq $0xffffffff8b38b670,0x18(%rsp)
f: 38 8b
11: 48 01 e8 add %rbp,%rax
14: 48 c7 44 24 20 80 e6 movq $0xffffffff815ce680,0x20(%rsp)
1b: 5c 81
1d: c7 00 f1 f1 f1 f1 movl $0xf1f1f1f1,(%rax)
23: c7 40 04 f1 f1 04 f2 movl $0xf204f1f1,0x4(%rax)
* 2a: c7 40 08 04 f3 f3 f3 movl $0xf3f3f304,0x8(%rax) <-- trapping instruction
31: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
38: 00 00
3a: 48 rex.W
3b: 89 .byte 0x89
3c: 84 24 88 test %ah,(%rax,%rcx,4)