INFO: task syz-executor.3:6696 blocked for more than 143 seconds.
Not tainted 6.6.0-syzkaller-12401-g8f6f76a6a29f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:24304 pid:6696 tgid:6696 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xee2/0x59a0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe7/0x270 kernel/sched/core.c:6778
schedule_timeout+0x278/0x2c0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e0/0x5f0 kernel/sched/completion.c:116
__flush_work+0x523/0xa10 kernel/workqueue.c:3407
nilfs_segctor_destroy fs/nilfs2/segment.c:2765 [inline]
nilfs_detach_log_writer+0x8c6/0xa80 fs/nilfs2/segment.c:2849
nilfs_put_super+0x43/0x1b0 fs/nilfs2/super.c:499
generic_shutdown_super+0x161/0x3c0 fs/super.c:696
kill_block_super+0x3b/0x90 fs/super.c:1667
deactivate_locked_super+0xbc/0x1a0 fs/super.c:484
deactivate_super+0xde/0x100 fs/super.c:517
cleanup_mnt+0x222/0x450 fs/namespace.c:1256
task_work_run+0x14d/0x240 kernel/task_work.c:180
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+0x215/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:88
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fdd56a7de17
RSP: 002b:00007fff25fd0a78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fdd56a7de17
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007fff25fd0b30
RBP: 00007fff25fd0b30 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff25fd1bf0
R13: 00007fdd56ac73b9 R14: 00000000000ba9c4 R15: 0000000000000005
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cfad0a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8cfad0a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8cfad0a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by getty/4813:
#0: ffff888026af40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206
3 locks held by kworker/u4:11/5628:
#0: ffff8880b983c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:566 [inline]
#0: ffff8880b983c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:551
#1: ffffc9000aaa7d80 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffff8880b99297d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5d/0x200 kernel/time/timer.c:999
1 lock held by syz-executor.3/6696:
#0: ffff88807a3a00e0 (&type->s_umount_key#78){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807a3a00e0 (&type->s_umount_key#78){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807a3a00e0 (&type->s_umount_key#78){+.+.}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:516
3 locks held by kworker/1:8/7429:
#0: ffff888013070d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc900189ffd80 ((work_completion)(&sci->sc_iput_work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffff88807a3a0608 (sb_internal#4){.+.+}-{0:0}, at: nilfs_evict_inode+0x157/0x550 fs/nilfs2/inode.c:929
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.0-syzkaller-12401-g8f6f76a6a29f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7330 Comm: kworker/u4:16 Not tainted 6.6.0-syzkaller-12401-g8f6f76a6a29f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:mark_lock+0x1ce/0x1950 kernel/locking/lockdep.c:4646
Code: 8d 7e 22 48 89 f8 48 c1 e8 03 0f b6 04 10 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 d4 08 00 00 f6 43 22 03 0f 84 d9 fe ff ff <41> bc 00 02 00 00 41 bd 09 00 00 00 e9 d7 fe ff ff 48 c7 c0 e0 85
RSP: 0018:ffffc900188177e0 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffff888067ef4690 RCX: ffffffff8168c09c
RDX: 0000000000000002 RSI: ffff888067ef4690 RDI: ffff888067ef46b2
RBP: ffffc90018817948 R08: 0000000000000000 R09: fffffbfff23e13eb
R10: ffffffff91f09f5f R11: 0000000000000000 R12: ffffed100cfde8c7
R13: 0000000000000008 R14: 1ffff92003102f04 R15: 0000000000000004
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff8d874dbb8 CR3: 000000007bdac000 CR4: 0000000000350ef0
Call Trace:
mark_usage kernel/locking/lockdep.c:4598 [inline]
__lock_acquire+0x975/0x5de0 kernel/locking/lockdep.c:5090
lock_acquire kernel/locking/lockdep.c:5753 [inline]
lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718
rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
rcu_read_lock include/linux/rcupdate.h:747 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x16e/0x10e0 net/batman-adv/network-coding.c:719
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242