INFO: task syz-executor.2:12179 can't die for more than 143 seconds.
task:syz-executor.2 state:D stack:28112 pid:12179 ppid: 9937 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4e90 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428
__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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f1d72ed6c2b
RSP: 002b:00007ffd5d8e5a50 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f1d72ed6c2b
RDX: 00007f1d7303b690 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007f1d73038960 R08: 0000000000000000 R09: 00007f1d7303b698
R10: 00007ffd5d8e5b50 R11: 0000000000000293 R12: 00000000001a00ff
R13: 00007ffd5d8e5b50 R14: 00007f1d73036f60 R15: 0000000000000032
INFO: task syz-executor.2:12179 blocked for more than 143 seconds.
Not tainted 5.16.0-next-20220116-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:28112 pid:12179 ppid: 9937 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4e90 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428
__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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f1d72ed6c2b
RSP: 002b:00007ffd5d8e5a50 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f1d72ed6c2b
RDX: 00007f1d7303b690 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007f1d73038960 R08: 0000000000000000 R09: 00007f1d7303b698
R10: 00007ffd5d8e5b50 R11: 0000000000000293 R12: 00000000001a00ff
R13: 00007ffd5d8e5b50 R14: 00007f1d73036f60 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb833a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3281:
#0: ffff888023481098 (&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.2/12179:
#0: ffff888040890218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff888040890218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
1 lock held by vhost-12183/12185:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-next-20220116-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:256 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:413
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: 3751 Comm: kworker/u4:7 Not tainted 5.16.0-next-20220116-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: krdsd rds_connect_worker
RIP: 0010:kmem_cache_free+0x0/0x3b0 mm/slub.c:3521
Code: d7 e8 f4 ca ea ff 0f 0b e8 ed 41 96 07 e9 c9 c1 53 07 e9 17 c2 53 07 e9 50 c2 53 07 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 <41> 56 41 55 41 54 49 89 fc 55 53 48 89 f3 48 83 ec 28 65 48 8b 04
RSP: 0018:ffffc9000353fa98 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff88802ce6eaf0 RCX: 0000000000000000
RDX: ffff88801f030000 RSI: ffff88802ce6e600 RDI: ffff88801c6afb40
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ffd2aff
R10: 0000000000000001 R11: 0000000000088078 R12: ffff88802ce6e600
R13: ffff88801c6afb40 R14: 0000000000000000 R15: ffff88801ac18570
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c017378200 CR3: 00000000731c0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
sk_prot_free net/core/sock.c:1957 [inline]
__sk_destruct+0x4dd/0x710 net/core/sock.c:2045
sk_destruct+0xbd/0xe0 net/core/sock.c:2060
__sk_free+0xef/0x3d0 net/core/sock.c:2071
sk_free+0x78/0xa0 net/core/sock.c:2082
sock_put include/net/sock.h:1912 [inline]
tcp_close+0x98/0xc0 net/ipv4/tcp.c:2920
inet_release+0x12e/0x280 net/ipv4/af_inet.c:428
inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:478
__sock_release net/socket.c:650 [inline]
sock_release+0x87/0x1b0 net/socket.c:678
rds_tcp_conn_path_connect+0x68f/0x880 net/rds/tcp_connect.c:188
rds_connect_worker+0x1a5/0x2c0 net/rds/threads.c:176
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: d7 xlat %ds:(%rbx)
1: e8 f4 ca ea ff callq 0xffeacafa
6: 0f 0b ud2
8: e8 ed 41 96 07 callq 0x79641fa
d: e9 c9 c1 53 07 jmpq 0x753c1db
12: e9 17 c2 53 07 jmpq 0x753c22e
17: e9 50 c2 53 07 jmpq 0x753c26c
1c: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
23: 00 00 00 00
27: 0f 1f 00 nopl (%rax)
* 2a: 41 56 push %r14 <-- trapping instruction
2c: 41 55 push %r13
2e: 41 54 push %r12
30: 49 89 fc mov %rdi,%r12
33: 55 push %rbp
34: 53 push %rbx
35: 48 89 f3 mov %rsi,%rbx
38: 48 83 ec 28 sub $0x28,%rsp
3c: 65 gs
3d: 48 rex.W
3e: 8b .byte 0x8b
3f: 04 .byte 0x4