INFO: task syz-executor.3:19622 blocked for more than 143 seconds.
Not tainted 6.2.0-rc3-syzkaller-00008-g1fe4fd6f5cad #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:23856 pid:19622 ppid:5080 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x995/0xe20 kernel/sched/core.c:6555
schedule+0xcb/0x190 kernel/sched/core.c:6631
request_wait_answer fs/fuse/dev.c:407 [inline]
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x1034/0x1870 fs/fuse/dev.c:511
fuse_send_ioctl fs/fuse/ioctl.c:14 [inline]
fuse_do_ioctl+0x13bc/0x26b0 fs/fuse/ioctl.c:273
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd14f08c0c9
RSP: 002b:00007fd14fd8c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd14f1ac050 RCX: 00007fd14f08c0c9
RDX: 00000000200042c0 RSI: 0000000050009418 RDI: 0000000000000005
RBP: 00007fd14f0e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd834b0cef R14: 00007fd14fd8c300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d326f50 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d327750 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8d326d80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
5 locks held by kworker/u4:2/34:
2 locks held by getty/4742:
#0: ffff888028ccb098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177
2 locks held by syz-executor.3/22505:
3 locks held by syz-executor.5/22498:
#0: ffff8880b993a1d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:537
#1: ffff8880b9927748 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x611/0x9a0 kernel/sched/psi.c:976
#2: ffff8880271cb638 (&sig->wait_chldexit){....}-{2:2}, at: __wake_up_common_lock kernel/sched/wait.c:137 [inline]
#2: ffff8880271cb638 (&sig->wait_chldexit){....}-{2:2}, at: __wake_up_sync_key+0x108/0x1f0 kernel/sched/wait.c:208
1 lock held by syz-executor.4/22499:
2 locks held by syz-executor.5/22516:
#0: ffff8880b983a1d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:537
#1: ffff8880b9827748 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x611/0x9a0 kernel/sched/psi.c:976
2 locks held by syz-executor.4/22522:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc3-syzkaller-00008-g1fe4fd6f5cad #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46f/0x4f0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ba/0x420 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xcd5/0xd20 kernel/hung_task.c:377
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4414 Comm: syslogd Not tainted 6.2.0-rc3-syzkaller-00008-g1fe4fd6f5cad #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:lockdep_recursion_inc kernel/locking/lockdep.c:461 [inline]
RIP: 0010:lock_is_held_type+0x63/0x180 kernel/locking/lockdep.c:5710
Code: e6 00 00 00 65 4c 8b 2c 25 40 98 03 00 41 83 bd 34 0a 00 00 00 0f 85 cf 00 00 00 41 89 f6 49 89 ff 9c 8f 04 24 4c 8b 24 24 fa <48> c7 c7 c0 c8 ed 8a e8 d1 14 00 00 65 ff 05 fa 15 51 75 41 83 bd
RSP: 0018:ffffc9000314f5b8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 1ffff92000629ec0 RCX: 0000000080000001
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8d326d00
RBP: 00000000ffffffff R08: dffffc0000000000 R09: fffffbfff1d2cdfe
R10: fffffbfff1d2cdfe R11: 1ffffffff1d2cdfd R12: 0000000000000246
R13: ffff88807e4f8000 R14: 00000000ffffffff R15: ffffffff8d326d00
FS: 00007fb7675c1800(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faa2d585058 CR3: 000000002b7b7000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x87/0x110 kernel/rcu/update.c:125
trace_lock_acquire+0x98/0x260 include/trace/events/lock.h:24
lock_acquire+0xa4/0x3c0 kernel/locking/lockdep.c:5639
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:325
rcu_read_lock include/linux/rcupdate.h:764 [inline]
unix_write_space+0x21/0x2f0 net/unix/af_unix.c:533
sock_wfree+0x1cc/0x610 net/core/sock.c:2449
unix_destruct_scm+0x2f9/0x360 net/unix/scm.c:152
skb_release_head_state+0xfb/0x250 net/core/skbuff.c:903
skb_release_all net/core/skbuff.c:914 [inline]
__kfree_skb+0x22/0x1d0 net/core/skbuff.c:930
__unix_dgram_recvmsg+0xc3a/0x1170 net/unix/af_unix.c:2525
sock_recvmsg_nosec net/socket.c:995 [inline]
sock_recvmsg net/socket.c:1013 [inline]
sock_read_iter+0x3fa/0x530 net/socket.c:1086
call_read_iter include/linux/fs.h:2183 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x7ac/0xbf0 fs/read_write.c:470
ksys_read+0x177/0x2a0 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb76774d8fe
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:00007ffef51bf048 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fb76774d8fe
RDX: 00000000000000ff RSI: 000055f4c1d79950 RDI: 0000000000000000
RBP: 000055f4c1d79910 R08: 00007fb7677dd040 R09: 00007fb7677dd0c0
R10: 00007fb7677dcfc0 R11: 0000000000000246 R12: 000055f4c1d799dc
R13: 000055f4c1d79950 R14: 0000000000000000 R15: 0000000000000000