INFO: task syz-executor.0:21011 blocked for more than 143 seconds.
Not tainted 6.8.0-rc3-syzkaller-00005-g99bd3cb0d12e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:22800 pid:21011 tgid:21010 ppid:10786 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752
__fdget_pos+0x258/0x320 fs/file.c:1191
fdget_pos include/linux/file.h:74 [inline]
__do_sys_getdents64 fs/readdir.c:405 [inline]
__se_sys_getdents64+0x1dc/0x4f0 fs/readdir.c:394
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f8eba87dda9
RSP: 002b:00007f8ebb61d0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f8eba9abf80 RCX: 00007f8eba87dda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 00007f8eba8ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f8eba9abf80 R15: 00007ffc27af8538
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:2/35:
2 locks held by getty/4813:
#0: ffff88802bcc70a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.2/5093:
#0: ffff88801ce820e0 (&type->s_umount_key#75){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88801ce820e0 (&type->s_umount_key#75){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88801ce820e0 (&type->s_umount_key#75){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:509
#1: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
#1: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:995
1 lock held by syz-executor.0/21011:
#0: ffff888069b29248 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x258/0x320 fs/file.c:1191
3 locks held by syz-executor.0/21018:
3 locks held by syz-executor.3/21146:
1 lock held by syz-executor.3/21147:
#0: ffff88807dad1c48 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x258/0x320 fs/file.c:1191
2 locks held by syz-executor.0/21228:
#0: ffff8880460da0e0 (&type->s_umount_key#75){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880460da0e0 (&type->s_umount_key#75){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880460da0e0 (&type->s_umount_key#75){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:509
#1: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#1: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:995
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc3-syzkaller-00005-g99bd3cb0d12e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2887 Comm: kworker/u4:11 Not tainted 6.8.0-rc3-syzkaller-00005-g99bd3cb0d12e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_acquire+0x96/0x1fd0
Code: 00 74 12 4c 89 e7 e8 d9 1c 81 00 48 be 00 00 00 00 00 fc ff df 48 c7 c0 20 23 b1 92 49 39 04 24 75 08 c7 44 24 38 00 00 00 00 <89> 5c 24 48 83 fd 01 77 2e 89 e8 49 8d 5c c4 08 48 89 d8 48 c1 e8
RSP: 0018:ffffc9000a7d7890 EFLAGS: 00000002
RAX: ffffffff92b12320 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffff888031fc5958
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f0856e R12: ffff888031fc5958
R13: 0000000000000000 R14: ffff88802c868000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa603a47d58 CR3: 0000000047f12000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:356 [inline]
batadv_nc_purge_paths+0xe8/0x3b0 net/batman-adv/network-coding.c:442
batadv_nc_worker+0x328/0x610 net/batman-adv/network-coding.c:720
process_one_work kernel/workqueue.c:2633 [inline]
process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242