INFO: task syz-executor.2:2782 blocked for more than 143 seconds.
Not tainted 6.5.0-rc1-syzkaller-00006-g3f01e9fed845 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:26992 pid:2782 ppid:5048 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0xc9a/0x5880 kernel/sched/core.c:6710
schedule+0xde/0x1a0 kernel/sched/core.c:6786
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
__pipe_lock fs/pipe.c:103 [inline]
pipe_release+0x4d/0x310 fs/pipe.c:721
__fput+0x40c/0xad0 fs/file_table.c:384
task_work_run+0x16f/0x270 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efd7b03e12b
RSP: 002b:00007ffda1086d00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007efd7b03e12b
RDX: 0000001b2ea20000 RSI: 000000000001b0f8 RDI: 0000000000000004
RBP: 00007efd7b1ad980 R08: 0000000000000000 R09: 00000000889b73dd
R10: 00007ffda110f090 R11: 0000000000000293 R12: 00000000001cfe7d
R13: 00007ffda1086e00 R14: 00007ffda1086e20 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c9a3af0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c9a37f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522
1 lock held by khungtaskd/27:
#0: ffffffff8c9a4700 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615
2 locks held by getty/4776:
#0: ffff88802d852098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xf08/0x13f0 drivers/tty/n_tty.c:2187
1 lock held by syz-executor.2/2782:
#0: ffff88802b8a7468 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:103 [inline]
#0: ffff88802b8a7468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x4d/0x310 fs/pipe.c:721
2 locks held by syz-executor.2/2783:
1 lock held by syz-executor.1/2838:
#0: ffff888077688468 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:103 [inline]
#0: ffff888077688468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x4d/0x310 fs/pipe.c:721
2 locks held by syz-executor.1/2842:
1 lock held by syz-executor.2/2890:
#0: ffff888049410c68 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:103 [inline]
#0: ffff888049410c68 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x4d/0x310 fs/pipe.c:721
2 locks held by syz-executor.2/2891:
1 lock held by syz-executor.2/2980:
#0: ffff88802b915868 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:103 [inline]
#0: ffff88802b915868 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x4d/0x310 fs/pipe.c:721
2 locks held by syz-executor.2/2982:
1 lock held by syz-executor.1/2981:
#0: ffff888027984468 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:103 [inline]
#0: ffff888027984468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x4d/0x310 fs/pipe.c:721
2 locks held by syz-executor.1/2983:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.5.0-rc1-syzkaller-00006-g3f01e9fed845 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x2a4/0x300 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+0xe16/0x1090 kernel/hung_task.c:379
kthread+0x344/0x440 kernel/kthread.c:389
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 54 Comm: kworker/u4:4 Not tainted 6.5.0-rc1-syzkaller-00006-g3f01e9fed845 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:__lock_acquire+0xc23/0x5e20 kernel/locking/lockdep.c:5141
Code: 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 80 9e 86 91 e8 05 39 72 00 48 0f a3 1d cd b9 20 10 <0f> 83 d5 0f 00 00 48 69 db d0 00 00 00 48 81 c3 a0 a2 86 91 48 8d
RSP: 0018:ffffc90000bf79a0 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 00000000000006ce RCX: ffffffff8165e4ab
RDX: fffffbfff230d3ec RSI: 0000000000000008 RDI: ffffffff91869f58
RBP: ffff8880162d28d8 R08: 0000000000000000 R09: fffffbfff230d3eb
R10: ffffffff91869f5f R11: 0000000000000000 R12: ffff8880162d1dc0
R13: 0000000000000000 R14: 0000000000000006 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0024d9000 CR3: 00000000353bf000 CR4: 0000000000350ef0
Call Trace:
lock_acquire kernel/locking/lockdep.c:5761 [inline]
lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5726
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:356 [inline]
batadv_nc_purge_paths+0xdf/0x3c0 net/batman-adv/network-coding.c:442
batadv_nc_worker+0x931/0xfe0 net/batman-adv/network-coding.c:722
process_one_work+0xa34/0x16f0 kernel/workqueue.c:2597
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2748
kthread+0x344/0x440 kernel/kthread.c:389
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308