INFO: task syz-executor.1:24866 blocked for more than 143 seconds.
Not tainted 5.17.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:28080 pid:24866 ppid: 3648 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:311
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: 0023:0xf6e9a549
RSP: 002b:00000000f752bb20 EFLAGS: 00000286 ORIG_RAX: 0000000000000006
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 00000000f6fd2000 RDI: 0000000000000000
RBP: 00000000f6ffdb80 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/3276:
#0: ffff888022e8b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b632e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
1 lock held by syz-executor.1/24866:
#0: ffff888024b00218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff888024b00218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
1 lock held by vhost-24867/24868:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.17.0-rc2-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: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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2953 Comm: syslogd Not tainted 5.17.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x99/0x5470 kernel/locking/lockdep.c:4885
Code: df 48 8d 14 01 c7 02 f1 f1 f1 f1 c7 42 04 00 f3 f3 f3 48 c7 c2 ec f9 94 8d 65 48 8b 34 25 28 00 00 00 48 89 b4 24 e8 00 00 00 <31> f6 48 c1 ea 03 0f b6 14 02 48 c7 c0 ec f9 94 8d 83 e0 07 83 c0
RSP: 0018:ffffc90001a8fa28 EFLAGS: 00000802
RAX: dffffc0000000000 RBX: 1ffff92000351f70 RCX: 1ffff92000351f57
RDX: ffffffff8d94f9ec RSI: 6c79f301afb21700 RDI: ffffffff8bb83c20
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: fffffbfff1b298c2 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8bb83c20 R15: 0000000000000002
FS: 00007f756e0cf800(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c002959708 CR3: 0000000023309000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5639 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:694 [inline]
aa_file_perm+0x14d/0x1230 security/apparmor/file.c:611
common_file_perm security/apparmor/lsm.c:475 [inline]
apparmor_file_permission+0x15e/0x4e0 security/apparmor/lsm.c:489
security_file_permission+0x4d/0xd0 security/security.c:1510
rw_verify_area+0xae/0x1c0 fs/read_write.c:385
vfs_read+0x126/0x600 fs/read_write.c:472
ksys_read+0x1ee/0x250 fs/read_write.c:619
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f756e25b8fe
Code: c0 e9 e6 fe ff ff 50 48 8d 3d 0e c7 09 00 e8 c9 cf 01 00 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 28
RSP: 002b:00007fffe17c0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f756e25b8fe
RDX: 00000000000000ff RSI: 00007f756f84e950 RDI: 0000000000000000
RBP: 00007f756f84e910 R08: 00007f756e2eb040 R09: 00007f756e2eb0c0
R10: 00007f756e2eafc0 R11: 0000000000000246 R12: 00007f756f84e99d
R13: 00007f756f84e950 R14: 0000000000000000 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: df 48 8d fisttps -0x73(%rax)
3: 14 01 adc $0x1,%al
5: c7 02 f1 f1 f1 f1 movl $0xf1f1f1f1,(%rdx)
b: c7 42 04 00 f3 f3 f3 movl $0xf3f3f300,0x4(%rdx)
12: 48 c7 c2 ec f9 94 8d mov $0xffffffff8d94f9ec,%rdx
19: 65 48 8b 34 25 28 00 mov %gs:0x28,%rsi
20: 00 00
22: 48 89 b4 24 e8 00 00 mov %rsi,0xe8(%rsp)
29: 00
* 2a: 31 f6 xor %esi,%esi <-- trapping instruction
2c: 48 c1 ea 03 shr $0x3,%rdx
30: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx
34: 48 c7 c0 ec f9 94 8d mov $0xffffffff8d94f9ec,%rax
3b: 83 e0 07 and $0x7,%eax
3e: 83 .byte 0x83
3f: c0 .byte 0xc0