INFO: task syz-executor.5:13977 blocked for more than 143 seconds.
Not tainted 5.16.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:24856 pid:13977 ppid: 8423 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
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:1217 [inline]
io_wq_put_and_exit+0x33a/0xb70 fs/io-wq.c:1252
io_uring_clean_tctx fs/io_uring.c:9801 [inline]
io_uring_cancel_generic+0x61d/0x690 fs/io_uring.c:9882
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:2852
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: 0033:0x7fd2173f1b19
RSP: 002b:00007fd216367188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000200 RBX: 00007fd217504f60 RCX: 00007fd2173f1b19
RDX: 0000000000000060 RSI: 00000000000045f5 RDI: 0000000000000004
RBP: 00007fd21744bf9f R08: 0000000000000000 R09: 0000000000001800
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc1935401f R14: 00007fd216367300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb80fe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
5 locks held by kworker/u4:2/44:
1 lock held by in:imklog/6435:
#0: ffff8880197c13b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc3-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: 3960 Comm: kworker/0:1 Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4725 [inline]
RIP: 0010:__lock_acquire+0x665/0x54a0 kernel/locking/lockdep.c:4977
Code: 8d 04 5b 48 c1 e0 06 48 05 20 5e f7 8f 48 8d b8 b8 00 00 00 48 89 fa 48 c1 ea 03 42 0f b6 14 3a 84 d2 74 06 0f 8e 5f 2b 00 00 <0f> b6 80 b8 00 00 00 84 c0 74 06 40 38 c5 0f 47 e8 48 8b 04 24 41
RSP: 0018:ffffc900075a78d0 EFLAGS: 00000046
RAX: ffffffff8ffcd2a0 RBX: 0000000000000746 RCX: ffffffff815b994d
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8ffcd358
RBP: 0000000000000004 R08: 0000000000000000 R09: ffffffff8ff75aef
R10: fffffbfff1feeb5d R11: 00000000919c9266 R12: 0000000000000002
R13: ffff888032f50180 R14: ffff888032f50be0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8bd8b68000 CR3: 000000006c301000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 00000000000004fa DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
_crng_backtrack_protect+0x71/0x1a0 drivers/char/random.c:1035
crng_backtrack_protect drivers/char/random.c:1053 [inline]
_get_random_bytes+0x295/0x670 drivers/char/random.c:1540
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:772 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:802 [inline]
nsim_dev_trap_report_work+0x72e/0xbc0 drivers/net/netdevsim/dev.c:843
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: 8d 04 5b lea (%rbx,%rbx,2),%eax
3: 48 c1 e0 06 shl $0x6,%rax
7: 48 05 20 5e f7 8f add $0xffffffff8ff75e20,%rax
d: 48 8d b8 b8 00 00 00 lea 0xb8(%rax),%rdi
14: 48 89 fa mov %rdi,%rdx
17: 48 c1 ea 03 shr $0x3,%rdx
1b: 42 0f b6 14 3a movzbl (%rdx,%r15,1),%edx
20: 84 d2 test %dl,%dl
22: 74 06 je 0x2a
24: 0f 8e 5f 2b 00 00 jle 0x2b89
* 2a: 0f b6 80 b8 00 00 00 movzbl 0xb8(%rax),%eax <-- trapping instruction
31: 84 c0 test %al,%al
33: 74 06 je 0x3b
35: 40 38 c5 cmp %al,%bpl
38: 0f 47 e8 cmova %eax,%ebp
3b: 48 8b 04 24 mov (%rsp),%rax
3f: 41 rex.B