INFO: task syz-executor.1:9492 blocked for more than 143 seconds.
Not tainted 5.16.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27088 pid: 9492 ppid: 3630 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+0xd1f/0x2590 kernel/locking/mutex.c:680
__mutex_lock kernel/locking/mutex.c:740 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792
memory_access_ok drivers/vhost/vhost.c:799 [inline]
vhost_set_memory drivers/vhost/vhost.c:1463 [inline]
vhost_dev_ioctl+0xdf3/0x12b0 drivers/vhost/vhost.c:1768
vhost_net_ioctl+0x2a5/0x1d10 drivers/vhost/net.c:1735
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f5712c6be99
RSP: 002b:00007f57115c0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5712d7f030 RCX: 00007f5712c6be99
RDX: 0000000020000300 RSI: 000000004008af03 RDI: 0000000000000005
RBP: 00007f5712cc5ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffd5c9fe2f R14: 00007f57115c0300 R15: 0000000000022000
INFO: task syz-executor.1:9495 blocked for more than 143 seconds.
Not tainted 5.16.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27792 pid: 9495 ppid: 3630 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+0xd1f/0x2590 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_ioctl+0x292/0x1d10 drivers/vhost/net.c:1734
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f5712c6be99
RSP: 002b:00007f571159f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5712d7f100 RCX: 00007f5712c6be99
RDX: 0000000020000280 RSI: 000000004028af11 RDI: 0000000000000005
RBP: 00007f5712cc5ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffd5c9fe2f R14: 00007f571159f300 R15: 0000000000022000
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/3279:
#0: ffff88814abdf098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113
2 locks held by syz-executor.1/9492:
#0: ffff88807ea90070 (&dev->mutex#5){+.+.}-{3:3}, at: vhost_net_ioctl+0x292/0x1d10 drivers/vhost/net.c:1734
#1: ffff88807ea90218 (&vq->mutex){+.+.}-{3:3}, at: memory_access_ok drivers/vhost/vhost.c:799 [inline]
#1: ffff88807ea90218 (&vq->mutex){+.+.}-{3:3}, at: vhost_set_memory drivers/vhost/vhost.c:1463 [inline]
#1: ffff88807ea90218 (&vq->mutex){+.+.}-{3:3}, at: vhost_dev_ioctl+0xdf3/0x12b0 drivers/vhost/vhost.c:1768
1 lock held by syz-executor.1/9495:
#0: ffff88807ea90070 (&dev->mutex#5){+.+.}-{3:3}, at: vhost_net_ioctl+0x292/0x1d10 drivers/vhost/net.c:1734
1 lock held by vhost-9491/9493:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc6-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: 2961 Comm: klogd Not tainted 5.16.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xc3/0x130 kernel/locking/spinlock.c:194
Code: 4c 89 f7 e8 4f 2b ba f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 b2 2a ba f7 f6 44 24 21 02 <75> 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 e8 c7 f0 43 f7
RSP: 0018:ffffc90001a6f1e0 EFLAGS: 00000046
RAX: 88a3a70587f2c800 RBX: 1ffff9200034de40 RCX: ffffffff90bb6903
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90001a6f268 R08: ffffffff818b2860 R09: fffffbfff21ce174
R10: fffffbfff21ce174 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff9200034de3c R14: ffffc90001a6f200 R15: 0000000000000246
FS: 00007fd04f692800(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c01d23a730 CR3: 000000007f13d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__debug_check_no_obj_freed lib/debugobjects.c:1002 [inline]
debug_check_no_obj_freed+0x5a2/0x650 lib/debugobjects.c:1023
free_pages_prepare mm/page_alloc.c:1343 [inline]
free_pcp_prepare+0x2a5/0xe00 mm/page_alloc.c:1389
free_unref_page_prepare mm/page_alloc.c:3309 [inline]
free_unref_page+0x7d/0x580 mm/page_alloc.c:3388
free_slab mm/slub.c:2033 [inline]
discard_slab mm/slub.c:2039 [inline]
__unfreeze_partials+0x1ab/0x200 mm/slub.c:2527
put_cpu_partial+0x116/0x180 mm/slub.c:2603
do_slab_free mm/slub.c:3501 [inline]
___cache_free+0xe6/0x120 mm/slub.c:3520
qlist_free_all mm/kasan/quarantine.c:165 [inline]
kasan_quarantine_reduce+0x151/0x1c0 mm/kasan/quarantine.c:272
__kasan_slab_alloc+0x2f/0xf0 mm/kasan/common.c:444
kasan_slab_alloc include/linux/kasan.h:259 [inline]
slab_post_alloc_hook mm/slab.h:519 [inline]
slab_alloc_node mm/slub.c:3234 [inline]
kmem_cache_alloc_node+0x201/0x370 mm/slub.c:3270
__alloc_skb+0xd8/0x5a0 net/core/skbuff.c:414
alloc_skb include/linux/skbuff.h:1127 [inline]
alloc_skb_with_frags+0xab/0x660 net/core/skbuff.c:6078
sock_alloc_send_pskb+0x928/0xa60 net/core/sock.c:2575
unix_dgram_sendmsg+0x816/0x2a50 net/unix/af_unix.c:1811
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg net/socket.c:724 [inline]
__sys_sendto+0x42e/0x5b0 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2044
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fd04f82e0ac
Code: 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 19 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 64 c3 0f 1f 00 55 48 83 ec 20 48 89 54 24 10
RSP: 002b:00007ffee9ed80d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd04f82e0ac
RDX: 0000000000000076 RSI: 000055ff1d6141c0 RDI: 0000000000000003
RBP: 000055ff1d60d910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000014
R13: 0000000000000001 R14: 00007fd04f9a977d R15: 00007ffee9ed81e8
----------------
Code disassembly (best guess):
0: 4c 89 f7 mov %r14,%rdi
3: e8 4f 2b ba f7 callq 0xf7ba2b57
8: 48 c7 44 24 20 00 00 movq $0x0,0x20(%rsp)
f: 00 00
11: 9c pushfq
12: 8f 44 24 20 popq 0x20(%rsp)
16: 42 80 3c 23 00 cmpb $0x0,(%rbx,%r12,1)
1b: 74 08 je 0x25
1d: 4c 89 f7 mov %r14,%rdi
20: e8 b2 2a ba f7 callq 0xf7ba2ad7
25: f6 44 24 21 02 testb $0x2,0x21(%rsp)
* 2a: 75 4e jne 0x7a <-- trapping instruction
2c: 41 f7 c7 00 02 00 00 test $0x200,%r15d
33: 74 01 je 0x36
35: fb sti
36: bf 01 00 00 00 mov $0x1,%edi
3b: e8 c7 f0 43 f7 callq 0xf743f107