INFO: task syz-executor.2:5883 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.2 state:D stack:26536 pid: 5883 ppid: 6717 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9846
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: 0033:0x7f51f6a97ae9
RSP: 002b:00007f51f400d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f51f6baaf68 RCX: 00007f51f6a97ae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f51f6baaf68
RBP: 00007f51f6baaf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f51f6baaf6c
R13: 00007f51f70deb2f R14: 00007f51f400d300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by in:imklog/6221:
#0: ffff888022620870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
1 lock held by rs:main Q:Reg/6222:
#0: ffff8880b9c39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
2 locks held by agetty/6452:
#0: ffff88801a4f7098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc900029992e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
=============================================
NMI backtrace for cpu 1
CPU: 1 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+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: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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2964 Comm: systemd-journal Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:this_cpu_pvti arch/x86/include/asm/kvmclock.h:13 [inline]
RIP: 0010:kvm_clock_read arch/x86/kernel/kvmclock.c:79 [inline]
RIP: 0010:kvm_sched_clock_read+0x7/0x40 arch/x86/kernel/kvmclock.c:91
Code: ce 7e e8 2c 07 00 00 65 ff 0d c5 dd ce 7e 74 01 c3 e8 fc b2 cc ff c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 65 ff 05 a9 dd ce 7e <65> 48 8b 3d a9 e2 ce 7e e8 fc 06 00 00 65 ff 0d 95 dd ce 7e 74 08
RSP: 0018:ffffc90001d1fe90 EFLAGS: 00000082
RAX: 0000000000000000 RBX: ffff88807a840720 RCX: ffffffff815c615f
RDX: 1ffff1100f50814b RSI: 0000000000000000 RDI: ffff88807a840720
RBP: ffff88807a840720 R08: 0000000000000000 R09: ffffffff8ff76a17
R10: fffffbfff1feed42 R11: 0000000000000000 R12: ffff88807a840750
R13: ffff88807a840760 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f0ed3a148c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0ed11ca000 CR3: 00000000196d4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000006
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
vtime_delta kernel/sched/cputime.c:637 [inline]
get_vtime_delta+0x1a/0x420 kernel/sched/cputime.c:646
vtime_user_exit+0xb4/0x210 kernel/sched/cputime.c:720
__context_tracking_exit+0xb8/0xe0 kernel/context_tracking.c:160
user_exit_irqoff include/linux/context_tracking.h:47 [inline]
__enter_from_user_mode kernel/entry/common.c:22 [inline]
syscall_enter_from_user_mode+0x4c/0x70 kernel/entry/common.c:104
do_syscall_64+0x16/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f0ed2cacf17
Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007ffd829632c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 0000555f957361e0 RCX: 00007f0ed2cacf17
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000555f957361e0
RBP: 0000000000000b94 R08: 000000006196d6df R09: 00007ffd829d4080
R10: 00007ffd829d4080 R11: 0000000000000202 R12: ffffffffffffffff
R13: 00007ffd82963358 R14: 0000555f9474c958 R15: 0005d117e039946e
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 7e e8 jle 0xffffffea
2: 2c 07 sub $0x7,%al
4: 00 00 add %al,(%rax)
6: 65 ff 0d c5 dd ce 7e decl %gs:0x7eceddc5(%rip) # 0x7eceddd2
d: 74 01 je 0x10
f: c3 retq
10: e8 fc b2 cc ff callq 0xffccb311
15: c3 retq
16: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
1d: 00 00 00 00
21: 90 nop
22: 65 ff 05 a9 dd ce 7e incl %gs:0x7ecedda9(%rip) # 0x7eceddd2
* 29: 65 48 8b 3d a9 e2 ce mov %gs:0x7ecee2a9(%rip),%rdi # 0x7ecee2da <-- trapping instruction
30: 7e
31: e8 fc 06 00 00 callq 0x732
36: 65 ff 0d 95 dd ce 7e decl %gs:0x7ecedd95(%rip) # 0x7eceddd2
3d: 74 08 je 0x47