INFO: task syz-executor.0:29762 blocked for more than 143 seconds.
Not tainted 5.17.0-rc3-syzkaller-00048-ge3c85076d7a6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28080 pid:29762 ppid: 3637 flags:0x20000004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4db0 kernel/sched/core.c:6295
schedule+0xd2/0x260 kernel/sched/core.c:6368
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6427
__mutex_lock_common kernel/locking/mutex.c:673 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
vhost_net_release+0x9c/0x2d0 drivers/vhost/net.c:1405
__fput+0x286/0x9f0 fs/file_table.c:313
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x27e/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_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6ead549
RSP: 002b:00000000f753eb20 EFLAGS: 00000286 ORIG_RAX: 0000000000000006
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 00000000f6fe5000 RDI: 0000000000000000
RBP: 00000000f700f6c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83c20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3279:
#0: ffff88814ae63098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b732e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
1 lock held by syz-executor.0/29762:
#0: ffff888045840218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff888045840218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
1 lock held by vhost-29765/29767:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.17.0-rc3-syzkaller-00048-ge3c85076d7a6 #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:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:377
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: 29767 Comm: vhost-29765 Not tainted 5.17.0-rc3-syzkaller-00048-ge3c85076d7a6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:unwind_next_frame+0x847/0x1ce0 arch/x86/kernel/unwind_orc.c:466
Code: ff 80 3d 8c b3 4a 0c 00 0f 85 f3 fb ff ff e9 7d 2f d2 07 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 08 48 c1 ea 03 80 3c 02 00 <0f> 85 2a 0f 00 00 4c 89 c0 49 8b 56 38 48 be 00 00 00 00 00 fc ff
RSP: 0018:ffffc90000007838 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 1ffff92000000f0f RCX: ffffffff8e10bf01
RDX: 1ffff92000000f29 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 0000000000000002 R08: ffffffff8e10befc R09: 0000000000000001
R10: fffff52000000f2d R11: 0000000000088078 R12: ffffc90000007958
R13: ffffc90000007945 R14: ffffc90000007910 R15: ffffffff8e10bf00
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f23adbfd8c8 CR3: 000000006bf40000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
__kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348
insert_work+0x48/0x370 kernel/workqueue.c:1368
__queue_work+0x5ca/0xf30 kernel/workqueue.c:1534
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1461 [inline]
__run_timers.part.0+0x4a6/0xa30 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__sanitizer_cov_trace_pc+0x50/0x60 kernel/kcov.c:206
Code: 35 8b 82 a4 15 00 00 85 c0 74 2b 8b 82 80 15 00 00 83 f8 02 75 20 48 8b 8a 88 15 00 00 8b 92 84 15 00 00 48 8b 01 48 83 c0 01 <48> 39 c2 76 07 48 89 34 c1 48 89 01 c3 0f 1f 00 41 55 41 54 49 89
RSP: 0018:ffffc9000b5f7af0 EFLAGS: 00000216
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000e63a000
RDX: 0000000000040000 RSI: ffffffff86d4ef03 RDI: ffff88807653e590
RBP: dffffc0000000000 R08: 000000000000000f R09: ffffc9000b5f7b27
R10: ffffffff86d4ee94 R11: 0000000000000001 R12: ffff88807653e580
R13: 000000000000000f R14: 0000000000000000 R15: 0000000000000000
vhost_iotlb_itree_subtree_search drivers/vhost/iotlb.c:19 [inline]
vhost_iotlb_itree_iter_first drivers/vhost/iotlb.c:19 [inline]
vhost_iotlb_itree_first+0x143/0x280 drivers/vhost/iotlb.c:169
iotlb_access_ok+0x1ce/0x3e0 drivers/vhost/vhost.c:1336
vq_meta_prefetch+0xbc/0x280 drivers/vhost/vhost.c:1366
handle_rx+0x145/0x1b40 drivers/vhost/net.c:1140
vhost_worker+0x23d/0x3d0 drivers/vhost/vhost.c:372
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: ff 80 3d 8c b3 4a incl 0x4ab38c3d(%rax)
6: 0c 00 or $0x0,%al
8: 0f 85 f3 fb ff ff jne 0xfffffc01
e: e9 7d 2f d2 07 jmpq 0x7d22f90
13: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1a: fc ff df
1d: 48 8b 54 24 08 mov 0x8(%rsp),%rdx
22: 48 c1 ea 03 shr $0x3,%rdx
26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
* 2a: 0f 85 2a 0f 00 00 jne 0xf5a <-- trapping instruction
30: 4c 89 c0 mov %r8,%rax
33: 49 8b 56 38 mov 0x38(%r14),%rdx
37: 48 rex.W
38: be 00 00 00 00 mov $0x0,%esi
3d: 00 fc add %bh,%ah
3f: ff .byte 0xff