INFO: task syz-executor.4:9177 blocked for more than 143 seconds.
Not tainted 6.4.0-syzkaller-08881-g533925cb7604 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:24808 pid:9177 ppid:7022 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1873/0x48f0 kernel/sched/core.c:6710
schedule+0xc3/0x180 kernel/sched/core.c:6786
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845
__mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
__pipe_lock fs/pipe.c:103 [inline]
pipe_release+0x51/0x330 fs/pipe.c:721
__fput+0x3f8/0x950 fs/file_table.c:378
task_work_run+0x24a/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f886aa3e12b
RSP: 002b:00007ffd179228e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f886aa3e12b
RDX: 0000001b31d20000 RSI: 000000000001a4e6 RDI: 0000000000000004
RBP: 00007f886abad980 R08: 0000000000000000 R09: 00000000892bbf50
R10: 00007ffd1799a080 R11: 0000000000000293 R12: 00000000000538d6
R13: 00007ffd179229e0 R14: 00007ffd17922a00 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8d126af0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8d126eb0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522
1 lock held by khungtaskd/28:
#0: ffffffff8d126920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
3 locks held by kworker/u4:4/57:
2 locks held by getty/4754:
#0: ffff888028e2e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900015c02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1db0 drivers/tty/n_tty.c:2176
1 lock held by syz-executor.4/9177:
#0: ffff888027a14468 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:103 [inline]
#0: ffff888027a14468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x51/0x330 fs/pipe.c:721
2 locks held by syz-executor.4/9182:
1 lock held by syz-executor.0/9231:
#0: ffff888028b8b468 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:103 [inline]
#0: ffff888028b8b468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x51/0x330 fs/pipe.c:721
2 locks held by syz-executor.0/9233:
1 lock held by syz-executor.4/9255:
#0: ffff8880228ba468 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:103 [inline]
#0: ffff8880228ba468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x51/0x330 fs/pipe.c:721
2 locks held by syz-executor.4/9256:
1 lock held by syz-executor.0/9312:
#0: ffff88802b8dd468 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:103 [inline]
#0: ffff88802b8dd468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x51/0x330 fs/pipe.c:721
2 locks held by syz-executor.0/9313:
1 lock held by syz-executor.4/9314:
#0: ffff88802a6a2c68 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:103 [inline]
#0: ffff88802a6a2c68 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x51/0x330 fs/pipe.c:721
2 locks held by syz-executor.4/9315:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.4.0-syzkaller-08881-g533925cb7604 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xec2/0xf00 kernel/hung_task.c:379
kthread+0x2b8/0x350 kernel/kthread.c:389
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: 57 Comm: kworker/u4:4 Not tainted 6.4.0-syzkaller-08881-g533925cb7604 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:hlock_class kernel/locking/lockdep.c:240 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4780 [inline]
RIP: 0010:__lock_acquire+0x5b3/0x7f70 kernel/locking/lockdep.c:5094
Code: 33 33 79 00 48 0f a3 1d 8b d2 ec 0e 73 23 48 69 c3 d0 00 00 00 48 8d 98 00 72 25 90 48 ba 00 00 00 00 00 fc ff df 4c 8b 3c 24 <4c> 8b 6c 24 50 eb 39 48 c7 c0 60 92 d7 91 48 c1 e8 03 48 ba 00 00
RSP: 0018:ffffc900015876c0 EFLAGS: 00000006
RAX: 0000000000058900 RBX: ffffffff902afb00 RCX: ffffffff816b406d
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff905813d8
RBP: ffffc90001587988 R08: ffffffff905813df R09: 1ffffffff20b027b
R10: dffffc0000000000 R11: fffffbfff20b027c R12: ffff888014ee9dc0
R13: 00000000000006d0 R14: 00000000000406d0 R15: ffff888014eea8f8
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ae0a36c600 CR3: 000000000cf30000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5761
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:355 [inline]
batadv_nc_purge_paths+0xe8/0x3a0 net/batman-adv/network-coding.c:442
batadv_nc_worker+0x30f/0x5c0 net/batman-adv/network-coding.c:722
process_one_work+0x92c/0x12c0 kernel/workqueue.c:2597
worker_thread+0xa63/0x1210 kernel/workqueue.c:2748
kthread+0x2b8/0x350 kernel/kthread.c:389
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308