INFO: task syz-executor.0:2707 blocked for more than 143 seconds.
Not tainted 6.0.0-rc5-syzkaller-00721-g80e78fcce86d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28000 pid: 2707 ppid: 3682 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x957/0xe20 kernel/sched/core.c:6494
schedule+0xcb/0x190 kernel/sched/core.c:6570
perf_event_free_task+0x585/0x6c0 kernel/events/core.c:12907
copy_process+0x2fe6/0x4010 kernel/fork.c:2539
kernel_clone+0x22f/0x7a0 kernel/fork.c:2674
__do_sys_clone kernel/fork.c:2808 [inline]
__se_sys_clone kernel/fork.c:2792 [inline]
__x64_sys_clone+0x276/0x2e0 kernel/fork.c:2792
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x4603b9
RSP: 002b:00007f781adaa198 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 000000000052bf00 RCX: 00000000004603b9
RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0000002102001ff9
RBP: 00000000004a9a99 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000005 R14: 00000000004aa8e8 R15: 00007f781adaa6bc
Showing all locks held in the system:
5 locks held by kworker/u4:0/8:
#0: ffff8880b9a39c18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:544
#1: ffff8880b9a27748 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x5b1/0x8a0 kernel/sched/psi.c:885
#2: ffff8880b9a28318 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x12a/0x270 kernel/time/timer.c:999
#3: ffffffff91a63320 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x97/0x6a0 lib/debugobjects.c:658
#4: ffffffff8cbd36e8 (text_mutex){+.+.}-{3:3}, at: arch_jump_label_transform_apply+0xe/0x20 arch/x86/kernel/jump_label.c:145
3 locks held by kworker/u4:1/11:
#0: ffff8880b9a39c18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:544
#1: ffff8880b9a27748 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x53a/0x8a0 kernel/sched/psi.c:876
#2: ffff8880b9a28318 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x12a/0x270 kernel/time/timer.c:999
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cd20a70 (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: ffffffff8cd21270 (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: ffffffff8cd208a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3286:
#0: ffff88807edf8098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2177
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc5-syzkaller-00721-g80e78fcce86d #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+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x47c/0x4b0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x169/0x280 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+0xcd5/0xd20 kernel/hung_task.c:369
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted 6.0.0-rc5-syzkaller-00721-g80e78fcce86d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Workqueue: bat_events batadv_nc_worker
RIP: 0010:validate_chain+0x33/0x6600 kernel/locking/lockdep.c:3785
Code: 55 41 54 53 48 83 e4 e0 48 81 ec 00 03 00 00 49 89 ce 89 54 24 28 49 89 fd 65 48 8b 04 25 28 00 00 00 48 89 84 24 e0 02 00 00 <49> bc 00 00 00 00 00 fc ff df 48 c7 84 24 00 01 00 00 b3 8a b5 41
RSP: 0018:ffffc900001075e0 EFLAGS: 00000082
RAX: 44b54b338ae01100 RBX: ffffffff8fc99cc0 RCX: 71d165d4c79f74a2
RDX: 0000000000000000 RSI: ffff88801235c5c8 RDI: ffff88801235bb00
RBP: ffffc90000107918 R08: dffffc0000000000 R09: fffffbfff1ff4409
R10: fffffbfff1ff4409 R11: 1ffffffff1ff4408 R12: 1ffff1100246b8ad
R13: ffff88801235bb00 R14: 71d165d4c79f74a2 R15: 0000000000004000
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f5baadd988 CR3: 000000007f5d3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_acquire+0x1292/0x1f60 kernel/locking/lockdep.c:5053
lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5666
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:280
rcu_read_lock include/linux/rcupdate.h:706 [inline]
batadv_nc_process_nc_paths+0xc1/0x370 net/batman-adv/network-coding.c:687
batadv_nc_worker+0x3de/0x5b0 net/batman-adv/network-coding.c:728
process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30