INFO: task syz.8.792:10012 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.792 state:D stack:24816 pid:10012 tgid:10011 ppid:9306 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x16dc/0x5500 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7326
do_uevent+0x2c3/0x570 fs/dlm/lockspace.c:206
new_lockspace fs/dlm/lockspace.c:583 [inline]
__dlm_new_lockspace+0x1aa4/0x2060 fs/dlm/lockspace.c:638
user_cluster_connect+0x231/0xcc0 fs/ocfs2/stack_user.c:976
ocfs2_cluster_connect+0x445/0x720 fs/ocfs2/stackglue.c:355
ocfs2_cluster_connect_agnostic+0x6e/0x90 fs/ocfs2/stackglue.c:385
user_dlm_register+0xd2/0x210 fs/ocfs2/dlmfs/userdlm.c:669
dlmfs_mkdir+0x13c/0x340 fs/ocfs2/dlmfs/dlmfs.c:434
vfs_mkdir+0x402/0x620 fs/namei.c:5276
filename_mkdirat+0x289/0x520 fs/namei.c:5309
__do_sys_mkdir fs/namei.c:5336 [inline]
__se_sys_mkdir+0x34/0x150 fs/namei.c:5333
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9b7ec2e0d9
RSP: 002b:00007f9b7ce86028 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f9b7eeb5fa0 RCX: 00007f9b7ec2e0d9
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000640
RBP: 00007f9b7ecc5024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9b7eeb6038 R14: 00007f9b7eeb5fa0 R15: 00007ffef55d2eb8
Showing all locks held in the system:
1 lock held by khungtaskd/37:
#0: ffffffff8e1c3000 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8e1c3000 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8e1c3000 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/5341:
#0: ffff8880325a80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90003cbe2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 drivers/tty/n_tty.c:2211
5 locks held by kworker/u8:86/9192:
3 locks held by syz.8.792/10012:
#0: ffff88803a196500 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
#1: ffff8880446e5600 (&sb->s_type->i_mutex_key#33/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline]
#1: ffff8880446e5600 (&sb->s_type->i_mutex_key#33/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2918 [inline]
#1: ffff8880446e5600 (&sb->s_type->i_mutex_key#33/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2942 [inline]
#1: ffff8880446e5600 (&sb->s_type->i_mutex_key#33/1){+.+.}-{4:4}, at: filename_create+0x200/0x370 fs/namei.c:4955
#2: ffffffff99bcf498 (&ls_lock){+.+.}-{4:4}, at: __dlm_new_lockspace+0xa3/0x2060 fs/dlm/lockspace.c:632
1 lock held by dlm_recoverd/10019:
#0: ffff8880251c0d20 (&ls->ls_in_recovery){+.+.}-{4:4}, at: dlm_recoverd+0xba/0x23e0 fs/dlm/recoverd.c:400
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122
nmi_trigger_cpumask_backtrace+0x17a/0x380 lib/nmi_backtrace.c:65
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xfd7/0x1030 kernel/hung_task.c:561
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9192 Comm: kworker/u8:86 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: bat_events batadv_tt_purge
RIP: 0010:__lock_acquire+0x6a3/0x2ce0 kernel/locking/lockdep.c:5207
Code: ba 08 00 00 00 e8 7d 44 00 00 31 ed 85 c0 0f 84 19 0d 00 00 83 3d 6c 41 08 18 00 75 13 48 63 44 24 20 48 0f a3 05 3d b1 04 12 <0f> 83 5d 1e 00 00 49 8b 9e f8 0b 00 00 48 83 3c 24 00 75 1e 48 83
RSP: 0018:ffffc9000ca2f7a0 EFLAGS: 00000047
RAX: 000000000000000b RBX: ffff888032552ba0 RCX: ffffffff93471d68
RDX: 0000000000000008 RSI: ffff888032552b80 RDI: ffff888032551f00
RBP: 0000000000000000 R08: ffffffff8188621c R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e1c3000 R12: 0000000000000003
R13: ffff888032552b80 R14: ffff888032551f00 R15: 0000000000000003
FS: 0000000000000000(0000) GS:ffff888125c3a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005582ae365a38 CR3: 000000000dfb0000 CR4: 00000000003526f0
Call Trace:
lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:840 [inline]
__local_bh_disable_ip+0x205/0x420 kernel/softirq.c:174
local_bh_disable include/linux/bottom_half.h:20 [inline]
spin_lock_bh include/linux/spinlock_rt.h:89 [inline]
batadv_tt_local_purge+0x131/0x380 net/batman-adv/translation-table.c:1364
batadv_tt_purge+0x35/0x9f0 net/batman-adv/translation-table.c:3565
process_one_work kernel/workqueue.c:3322 [inline]
process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245