INFO: task syz-executor.1:10727 blocked for more than 143 seconds.
Not tainted 5.16.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26640 pid:10727 ppid: 3617 flags:0x00004004
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
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common+0xe9f/0x2490 kernel/locking/mutex.c:680
__mutex_lock kernel/locking/mutex.c:740 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792
vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
vhost_net_stop+0x10c/0x1e0 drivers/vhost/net.c:1373
vhost_net_release+0x100/0x4d0 drivers/vhost/net.c:1405
__fput+0x3fc/0x870 fs/file_table.c:280
task_work_run+0x146/0x1c0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x209/0x220 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: 0033:0x7fc266f92adb
RSP: 002b:00007ffec0a2d4b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fc266f92adb
RDX: 00007fc2670f76b8 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007fc2670f4960 R08: 0000000000000000 R09: 00007fc2670f76c0
R10: 00007ffec0a2d5b0 R11: 0000000000000293 R12: 000000000006110a
R13: 00007ffec0a2d5b0 R14: 00007fc2670f2f60 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1de00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3282:
#0: ffff88807eeaa098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002ba32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.1/10727:
#0: ffff88807df70218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff88807df70218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x10c/0x1e0 drivers/vhost/net.c:1373
1 lock held by vhost-10728/10729:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc7-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:111
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: 3662 Comm: kworker/1:5 Not tainted 5.16.0-rc7-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:mark_lock+0x0/0x1e00 kernel/locking/lockdep.c:4566
Code: ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 6f ff ff ff 4c 89 ff e8 d0 7f 68 00 e9 62 ff ff ff e8 b6 07 a4 08 66 0f 1f 44 00 00 <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec c0 01
RSP: 0018:ffffc90002b8f898 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffff88801a1ac4a8 RCX: ffffffff81667291
RDX: 0000000000000002 RSI: ffff88801a1ac488 RDI: ffff88801a1aba00
RBP: ffffc90002b8f960 R08: dffffc0000000000 R09: fffffbfff1ff3ddf
R10: fffffbfff1ff3ddf R11: 0000000000000000 R12: 0000000000000001
R13: ffff88801a1ac458 R14: ffff88801a1aba00 R15: 1ffff1100343588b
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffcf79a468 CR3: 000000000c88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_held_locks kernel/locking/lockdep.c:4206 [inline]
__trace_hardirqs_on_caller kernel/locking/lockdep.c:4224 [inline]
lockdep_hardirqs_on_prepare+0x26e/0x780 kernel/locking/lockdep.c:4292
trace_hardirqs_on+0x6f/0x80 kernel/trace/trace_preemptirq.c:49
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
_raw_spin_unlock_irqrestore+0x8b/0x130 kernel/locking/spinlock.c:194
__debug_check_no_obj_freed lib/debugobjects.c:1002 [inline]
debug_check_no_obj_freed+0x5a2/0x650 lib/debugobjects.c:1023
slab_free_hook mm/slub.c:1698 [inline]
slab_free_freelist_hook+0xcf/0x1a0 mm/slub.c:1749
slab_free mm/slub.c:3513 [inline]
kmem_cache_free+0xa4/0x180 mm/slub.c:3530
nsim_dev_trap_report drivers/net/netdevsim/dev.c:818 [inline]
nsim_dev_trap_report_work+0x7c6/0xaf0 drivers/net/netdevsim/dev.c:843
process_one_work+0x853/0x1140 kernel/workqueue.c:2298
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: ff 44 89 f9 incl -0x7(%rcx,%rcx,4)
4: 80 e1 07 and $0x7,%cl
7: 80 c1 03 add $0x3,%cl
a: 38 c1 cmp %al,%cl
c: 0f 8c 6f ff ff ff jl 0xffffff81
12: 4c 89 ff mov %r15,%rdi
15: e8 d0 7f 68 00 callq 0x687fea
1a: e9 62 ff ff ff jmpq 0xffffff81
1f: e8 b6 07 a4 08 callq 0x8a407da
24: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
* 2a: 55 push %rbp <-- trapping instruction
2b: 48 89 e5 mov %rsp,%rbp
2e: 41 57 push %r15
30: 41 56 push %r14
32: 41 55 push %r13
34: 41 54 push %r12
36: 53 push %rbx
37: 48 83 e4 e0 and $0xffffffffffffffe0,%rsp
3b: 48 rex.W
3c: 81 .byte 0x81
3d: ec in (%dx),%al
3e: c0 .byte 0xc0
3f: 01 .byte 0x1