INFO: task syz-executor.4:7797 blocked for more than 143 seconds.
Not tainted 6.2.0-rc4-syzkaller-00379-gf883675bf652 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28136 pid:7797 ppid:27726 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6606
schedule+0xde/0x1b0 kernel/sched/core.c:6682
request_wait_answer+0x46d/0x850 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x711/0xe80 fs/fuse/dev.c:511
fuse_flush+0x4cc/0x6b0 fs/fuse/file.c:521
filp_close+0xb8/0x160 fs/open.c:1420
close_files fs/file.c:432 [inline]
put_files_struct fs/file.c:447 [inline]
put_files_struct+0x1d4/0x350 fs/file.c:444
exit_files+0x82/0xb0 fs/file.c:464
do_exit+0xa6e/0x2950 kernel/exit.c:862
do_group_exit+0xd4/0x2a0 kernel/exit.c:1012
get_signal+0x21c3/0x2450 kernel/signal.c:2859
arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f696feb0df1
RSP: 002b:00007fff6f653270 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: 0000000000000000 RBX: 00007f696ffabf80 RCX: 00007f696feb0df1
RDX: 00007fff6f6532b0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f696ffad980 R08: 0000000000000000 R09: 00007fff6f7aa080
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000036c838
R13: 00007fff6f6533c0 R14: 00007f696ffabf80 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/11:
#0: ffffffff8c78dff0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/12:
#0: ffffffff8c78dcf0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/27:
#0: ffffffff8c78eb40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x264 kernel/locking/lockdep.c:6494
2 locks held by getty/4741:
#0: ffff88802dcd4098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900020182f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
3 locks held by kworker/u4:15/8041:
#0: ffff8880b993b5d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:537
#1: ffff8880b99287c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2de/0x930 kernel/sched/psi.c:976
#2: ffff8880b9929618 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5a/0x1f0 kernel/time/timer.c:999
3 locks held by kworker/u4:17/8045:
2 locks held by kworker/u4:67/8396:
12 locks held by kworker/u4:80/8434:
1 lock held by udevadm/9353:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.2.0-rc4-syzkaller-00379-gf883675bf652 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x333/0x3c0 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+0xc75/0xfc0 kernel/hung_task.c:377
kthread+0x2e8/0x3a0 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: 8396 Comm: kworker/u4:67 Not tainted 6.2.0-rc4-syzkaller-00379-gf883675bf652 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:iterate_chain_key kernel/locking/lockdep.c:447 [inline]
RIP: 0010:__lock_acquire+0xc1f/0x56d0 kernel/locking/lockdep.c:5043
Code: 80 3c 02 00 0f 85 f3 37 00 00 48 83 7b 40 00 0f 84 df 0d 00 00 0f b7 44 24 18 8b 4c 24 58 8b 5c 24 40 c1 e0 0d 66 0b 44 24 08 <89> de 98 2b 44 24 50 33 84 24 80 00 00 00 89 c2 29 c1 01 d8 c1 c2
RSP: 0018:ffffc90005c7fa28 EFLAGS: 00000006
RAX: 0000000000004021 RBX: 00000000f0e35846 RCX: 000000004bd5715e
RDX: 1ffffffff22662fc RSI: 0000000000000008 RDI: ffffffff913317e0
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff9132fac7
R10: fffffbfff2265f58 R11: 0000000000000000 R12: ffff8880323fad08
R13: ffff8880323fa280 R14: ffff8880323facb8 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd9ca28c920 CR3: 000000007e996000 CR4: 00000000003506e0
Call Trace:
lock_acquire kernel/locking/lockdep.c:5668 [inline]
lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633
rcu_lock_acquire include/linux/rcupdate.h:325 [inline]
rcu_read_lock include/linux/rcupdate.h:764 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x131/0xfa0 net/batman-adv/network-coding.c:719
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x669/0x1090 kernel/workqueue.c:2436
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308