INFO: task syz-executor:5891 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21736 pid:5891 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
bit_wait+0x11/0xd0 kernel/sched/wait_bit.c:199
__wait_on_bit+0xac/0x2d0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x123/0x170 kernel/sched/wait_bit.c:64
wait_on_bit include/linux/wait_bit.h:76 [inline]
gfs2_glock_wait+0xbd/0x2a0 fs/gfs2/glock.c:1380
gfs2_glock_nq_init fs/gfs2/glock.h:252 [inline]
__gfs2_lookup+0x118/0x270 fs/gfs2/inode.c:905
__lookup_slow+0x281/0x3b0 fs/namei.c:1702
lookup_slow+0x53/0x70 fs/namei.c:1719
walk_component+0x2be/0x3f0 fs/namei.c:2010
lookup_last fs/namei.c:2467 [inline]
path_lookupat+0x169/0x440 fs/namei.c:2491
filename_lookup+0x1f4/0x510 fs/namei.c:2520
user_path_at_empty+0x42/0x60 fs/namei.c:2917
user_path_at include/linux/namei.h:57 [inline]
ksys_umount fs/namespace.c:1921 [inline]
__do_sys_umount fs/namespace.c:1929 [inline]
__se_sys_umount fs/namespace.c:1927 [inline]
__x64_sys_umount+0xf5/0x170 fs/namespace.c:1927
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2306b90a77
RSP: 002b:00007ffdf7841b18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00007f2306c13d7d RCX: 00007f2306b90a77
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdf7841bd0
RBP: 00007ffdf7841bd0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdf7842cc0
R13: 00007f2306c13d7d R14: 000055556bbf24a8 R15: 00007ffdf7844e80
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
3 locks held by kworker/u4:12/3488:
#0: ffff8880b8f3c018 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
#1: ffff8880b8f289c0 (psi_seq){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:189 [inline]
#1: ffff8880b8f289c0 (psi_seq){-.-.}-{0:0}, at: __schedule+0x20ee/0x44d0 kernel/sched/core.c:6694
#2: ffff8880b8f29598 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x123/0x270 kernel/time/timer.c:999
2 locks held by getty/5525:
#0: ffff88802d2630a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000326e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x425/0x1380 drivers/tty/n_tty.c:2217
1 lock held by syz-executor/5891:
#0: ffff8880611bb068 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline]
#0: ffff8880611bb068 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: lookup_slow+0x46/0x70 fs/namei.c:1718
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x39b/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x2f0 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+0xf41/0xf80 kernel/hung_task.c:379
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2968 Comm: kworker/u4:11 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:lookup_object lib/debugobjects.c:196 [inline]
RIP: 0010:lookup_object_or_alloc lib/debugobjects.c:565 [inline]
RIP: 0010:debug_object_assert_init+0xe0/0x2f0 lib/debugobjects.c:899
Code: fd 4c 89 34 24 4c 8b 6d 00 45 31 f6 eb 07 4d 8b 6d 00 41 ff c6 4d 85 ed 74 3c 4d 8d 65 18 4c 89 e0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 e7 e8 86 b4 b6 fd 49 39 1c 24 0f 84 ea 00 00 00 4c 89
RSP: 0018:ffffc9000c3e6fa8 EFLAGS: 00000046
RAX: 1ffff11004468ef1 RBX: ffff8880b8f293e0 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc9000c3e6e80
RBP: ffffffff970698f0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200187cdd0 R12: ffff888022347788
R13: ffff888022347770 R14: 0000000000000001 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1a32a2e000 CR3: 000000000cb30000 CR4: 00000000003506e0
Call Trace:
debug_timer_assert_init kernel/time/timer.c:792 [inline]
debug_assert_init kernel/time/timer.c:837 [inline]
__mod_timer+0x55/0xdb0 kernel/time/timer.c:1020
queue_delayed_work_on+0x12a/0x1e0 kernel/workqueue.c:1987
kvfree_call_rcu+0x541/0x780 kernel/rcu/tree.c:3481
cfg80211_update_known_bss+0x175/0x930 net/wireless/scan.c:-1
__cfg80211_bss_update+0x144/0x21f0 net/wireless/scan.c:1872
cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2982 [inline]
cfg80211_inform_bss_frame_data+0xaea/0x12b0 net/wireless/scan.c:3013
ieee80211_bss_info_update+0x70b/0x930 net/mac80211/scan.c:211
ieee80211_rx_bss_info net/mac80211/ibss.c:1124 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1613 [inline]
ieee80211_ibss_rx_queued_mgmt+0x17c9/0x2ac0 net/mac80211/ibss.c:1642
ieee80211_iface_process_skb net/mac80211/iface.c:1651 [inline]
ieee80211_iface_work+0x717/0xc70 net/mac80211/iface.c:1705
cfg80211_wiphy_work+0x225/0x260 net/wireless/core.c:437
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293