INFO: task syz-executor.4:23775 blocked for more than 143 seconds.
Not tainted 6.0.0-rc5-syzkaller-00094-ga335366bad13 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28656 pid:23775 ppid: 3640 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
io_uring_del_tctx_node+0x110/0x2b6 io_uring/tctx.c:175
io_uring_clean_tctx+0xce/0x174 io_uring/tctx.c:191
io_uring_cancel_generic+0x5aa/0x602 io_uring/io_uring.c:2852
io_uring_files_cancel include/linux/io_uring.h:44 [inline]
do_exit+0x4f9/0x29b0 kernel/exit.c:750
do_group_exit+0xd2/0x2f0 kernel/exit.c:925
get_signal+0x238c/0x2610 kernel/signal.c:2857
arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff1ac889409
RSP: 002b:00007ff1adaae218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007ff1ac99c058 RCX: 00007ff1ac889409
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff1ac99c058
RBP: 00007ff1ac99c050 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff1ac99c05c
R13: 00007ffd0319b24f R14: 00007ff1adaae300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8bf888b0 (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/13:
#0: ffffffff8bf885b0 (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/28:
#0: ffffffff8bf89400 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6492
2 locks held by getty/3279:
#0: ffff88814b137098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177
2 locks held by syz-executor.4/23774:
1 lock held by syz-executor.4/23775:
#0: ffff8880337550a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_uring_del_tctx_node+0x110/0x2b6 io_uring/tctx.c:175
2 locks held by syz-executor.4/23881:
2 locks held by syz-executor.4/23988:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc5-syzkaller-00094-ga335366bad13 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc18/0xf50 kernel/hung_task.c:369
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 22976 Comm: kworker/u4:7 Not tainted 6.0.0-rc5-syzkaller-00094-ga335366bad13 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_release kernel/locking/lockdep.c:5371 [inline]
RIP: 0010:lock_release+0x30a/0x780 kernel/locking/lockdep.c:5686
Code: 03 80 3c 02 00 0f 85 17 04 00 00 49 8d bf 68 0a 00 00 48 8b 1b 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 ff 03 00 00 41 8d 45 ff 49 89 9f 68 0a 00 00 44 39 e0 0f 84
RSP: 0018:ffffc9000549fbc0 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: baf8a2e75332e73a RCX: ffffc9000549fc10
RDX: 1ffff110044fe8ad RSI: 0000000000000000 RDI: ffff8880227f4568
RBP: 1ffff92000a93f7a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000003 R14: ffff8880227f4570 R15: ffff8880227f3b00
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c01045a380 CR3: 000000000bc8e000 CR4: 0000000000350ee0
Call Trace:
rcu_lock_release include/linux/rcupdate.h:285 [inline]
rcu_read_unlock include/linux/rcupdate.h:739 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x86b/0xfa0 net/batman-adv/network-coding.c:719
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306