INFO: task syz-executor.4:5062 blocked for more than 143 seconds.
Not tainted 6.5.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:20712 pid:5062 ppid:1 flags:0x00004006
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_timeout+0xb0/0x310 kernel/time/timer.c:2143
do_wait_for_common+0x449/0x5f0 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x4a/0x60 kernel/sched/completion.c:138
__flush_work+0x130/0x1b0 kernel/workqueue.c:3386
nilfs_segctor_destroy fs/nilfs2/segment.c:2761 [inline]
nilfs_detach_log_writer+0x47f/0xbb0 fs/nilfs2/segment.c:2845
nilfs_put_super+0x4d/0x160 fs/nilfs2/super.c:498
generic_shutdown_super+0x134/0x340 fs/super.c:499
kill_block_super+0x68/0xa0 fs/super.c:1417
deactivate_locked_super+0xa4/0x110 fs/super.c:330
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254
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: 0033:0x7fc30607de17
RSP: 002b:00007ffe08c613e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fc30607de17
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffe08c614a0
RBP: 00007ffe08c614a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe08c62560
R13: 00007fc3060c73b9 R14: 00000000000bbffe R15: 000000000000000f
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8d328db0 (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: ffffffff8d329170 (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: ffffffff8d328be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4776:
#0: ffff88814ab5f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1dc0 drivers/tty/n_tty.c:2187
1 lock held by syz-executor.4/5062:
#0: ffff88807a7660e0 (&type->s_umount_key#71){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:360
3 locks held by kworker/0:4/5104:
#0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7e3/0x12c0 kernel/workqueue.c:2569
#1: ffffc90005a4fd00 ((work_completion)(&sci->sc_iput_work)){+.+.}-{0:0}, at: process_one_work+0x82b/0x12c0 kernel/workqueue.c:2571
#2: ffff88807a766600 (sb_internal#5){.+.+}-{0:0}, at: nilfs_evict_inode+0x167/0x500 fs/nilfs2/inode.c:929
5 locks held by kworker/u4:8/5640:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.5.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
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+0x2e/0x60 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 57 Comm: kworker/u4:4 Not tainted 6.5.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:check_preemption_disabled+0x2/0x110 lib/smp_processor_id.c:13
Code: ff ff ff 0f 1f 44 00 00 f3 0f 1e fa 48 c7 c7 a0 a2 58 8b 48 c7 c6 e0 a2 58 8b eb 0c 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 57 <41> 56 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24
RSP: 0018:ffffc90001587a10 EFLAGS: 00000083
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8192675c
RDX: 0000000000000000 RSI: ffffffff8b58a2e0 RDI: ffffffff8b58a2a0
RBP: ffffc90001587b10 R08: ffffffff8e9861af R09: 1ffffffff1d30c35
R10: dffffc0000000000 R11: fffffbfff1d30c36 R12: dffffc0000000000
R13: 1ffff920002b0f54 R14: ffffc90001587aa0 R15: 0000000000000201
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000988000 CR3: 00000000290df000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline]
rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:695
trace_irq_enable+0x3b/0xf0 include/trace/events/preemptirq.h:40
trace_hardirqs_on+0x18/0x40 kernel/trace/trace_preemptirq.c:56
__local_bh_enable_ip+0x168/0x1f0 kernel/softirq.c:386
spin_unlock_bh include/linux/spinlock.h:396 [inline]
batadv_nc_purge_paths+0x309/0x3a0 net/batman-adv/network-coding.c:471
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+0x2e/0x60 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304