INFO: task syz-executor.2:4449 blocked for more than 143 seconds.
Not tainted 5.17.0-rc5-syzkaller-00272-g9137eda53752 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:26744 pid: 4449 ppid: 3625 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0xa94/0x4910 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6436
__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:317
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xb29/0x2a30 kernel/exit.c:806
do_group_exit+0xd2/0x2f0 kernel/exit.c:935
get_signal+0x45a/0x2490 kernel/signal.c:2863
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: 0033:0x7f6566035471
RSP: 002b:00007ffd3a059b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: fffffffffffffff4 RBX: 00007f65647fc700 RCX: 00007f6566035471
RDX: 00007f65647fc9d0 RSI: 00007f65647fc2f0 RDI: 00000000003d0f00
RBP: 00007ffd3a059d60 R08: 00007f65647fc700 R09: 00007f65647fc700
R10: 00007f65647fc9d0 R11: 0000000000000206 R12: 00007ffd3a059bce
R13: 00007ffd3a059bcf R14: 00007f65647fc300 R15: 0000000000022000
INFO: task syz-executor.4:4518 blocked for more than 144 seconds.
Not tainted 5.17.0-rc5-syzkaller-00272-g9137eda53752 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27704 pid: 4518 ppid: 3626 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0xa94/0x4910 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6436
__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:317
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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fe6c873ec8b
RSP: 002b:00007ffd7e3153d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fe6c873ec8b
RDX: 0000000000000000 RSI: 00007fe6c8510f40 RDI: 0000000000000003
RBP: 00007fe6c88a0960 R08: 0000000000000000 R09: 00000000a34e52f1
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000033458
R13: 00007ffd7e3154d0 R14: 00007ffd7e3154f0 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8bb81ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3275:
#0: ffff88814af9f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b5e2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2075
2 locks held by kworker/u4:6/3739:
#0: ffff8880b9d39cd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:489
#1: ffff8880b9d27948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3e7/0x4e0 kernel/sched/psi.c:891
1 lock held by syz-executor.2/4449:
#0: ffff888027740218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff888027740218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
1 lock held by vhost-4451/4452:
1 lock held by syz-executor.4/4518:
#0: ffff88802b7e0218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff88802b7e0218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
1 lock held by vhost-4519/4520:
2 locks held by syz-executor.2/4598:
#0: ffff888037400070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_net_set_features drivers/vhost/net.c:1645 [inline]
#0: ffff888037400070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_net_ioctl+0x19a/0x17a0 drivers/vhost/net.c:1716
#1: ffff888037400218 (&vq->mutex){+.+.}-{3:3}, at: vhost_init_device_iotlb+0x133/0x290 drivers/vhost/vhost.c:1735
1 lock held by syz-executor.2/4599:
#0: ffff888037400070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_net_set_owner drivers/vhost/net.c:1674 [inline]
#0: ffff888037400070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_net_ioctl+0x3fe/0x17a0 drivers/vhost/net.c:1732
1 lock held by syz-executor.2/4600:
#0: ffff888037400070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_process_iotlb_msg drivers/vhost/vhost.c:1098 [inline]
#0: ffff888037400070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_chr_write_iter+0x1cb/0x1130 drivers/vhost/vhost.c:1176
1 lock held by syz-executor.2/4601:
#0: ffff888037400070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_net_ioctl+0x786/0x17a0 drivers/vhost/net.c:1734
1 lock held by syz-executor.2/4602:
#0: ffff888037400070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_process_iotlb_msg drivers/vhost/vhost.c:1098 [inline]
#0: ffff888037400070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_chr_write_iter+0x1cb/0x1130 drivers/vhost/vhost.c:1176
1 lock held by vhost-4596/4597:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.17.0-rc5-syzkaller-00272-g9137eda53752 #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+0x1e6/0x230 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: 141 Comm: kworker/0:2 Not tainted 5.17.0-rc5-syzkaller-00272-g9137eda53752 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:56 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x34/0x180 mm/kasan/generic.c:189
Code: 89 f9 41 54 44 0f b6 c2 49 01 f1 55 53 0f 82 18 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f 86 05 01 00 00 49 83 e9 01 <48> 89 fd 48 b8 00 00 00 00 00 fc ff df 4d 89 ca 48 c1 ed 03 49 c1
RSP: 0018:ffffc900027e78b0 EFLAGS: 00000082
RAX: ffff7fffffffffff RBX: 00000000000000b1 RCX: ffffffff815c850f
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8ffc8950
RBP: 0000000000000004 R08: 0000000000000000 R09: ffffffff8ffc8957
R10: fffffbfff1ff912a R11: 0000000000000001 R12: 0000000000000000
R13: ffff888018878280 R14: ffff888018878ce0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5df66a2800 CR3: 0000000078cc0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
hlock_class kernel/locking/lockdep.c:199 [inline]
check_wait_context kernel/locking/lockdep.c:4725 [inline]
__lock_acquire+0x6ef/0x56c0 kernel/locking/lockdep.c:4977
lock_acquire kernel/locking/lockdep.c:5639 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
_extract_crng+0xcd/0x1b0 drivers/char/random.c:996
extract_crng drivers/char/random.c:1005 [inline]
_get_random_bytes+0x219/0x6a0 drivers/char/random.c:1462
eth_random_addr include/linux/etherdevice.h:232 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:752 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:802 [inline]
nsim_dev_trap_report_work+0x33a/0xbc0 drivers/net/netdevsim/dev.c:843
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 89 f9 mov %edi,%ecx
2: 41 54 push %r12
4: 44 0f b6 c2 movzbl %dl,%r8d
8: 49 01 f1 add %rsi,%r9
b: 55 push %rbp
c: 53 push %rbx
d: 0f 82 18 01 00 00 jb 0x12b
13: 48 b8 ff ff ff ff ff movabs $0xffff7fffffffffff,%rax
1a: 7f ff ff
1d: 48 39 c7 cmp %rax,%rdi
20: 0f 86 05 01 00 00 jbe 0x12b
26: 49 83 e9 01 sub $0x1,%r9
* 2a: 48 89 fd mov %rdi,%rbp <-- trapping instruction
2d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
34: fc ff df
37: 4d 89 ca mov %r9,%r10
3a: 48 c1 ed 03 shr $0x3,%rbp
3e: 49 rex.WB
3f: c1 .byte 0xc1