INFO: task kworker/0:1H:1628 blocked in I/O wait for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1H state:D stack:26264 pid:1628 tgid:1628 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: gfs2-glock/syz:syz glock_work_func
Call Trace:
context_switch kernel/sched/core.c:5354 [inline]
__schedule+0x165c/0x5520 kernel/sched/core.c:6966
__schedule_loop kernel/sched/core.c:7049 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7064
io_schedule+0x7f/0xd0 kernel/sched/core.c:7891
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
__wait_on_bit_lock+0xec/0x4e0 kernel/sched/wait_bit.c:93
out_of_line_wait_on_bit_lock+0x13b/0x190 kernel/sched/wait_bit.c:120
wait_on_bit_lock_io include/linux/wait_bit.h:221 [inline]
__lock_buffer fs/buffer.c:71 [inline]
lock_buffer include/linux/buffer_head.h:432 [inline]
discard_buffer fs/buffer.c:1496 [inline]
block_invalidate_folio+0x370/0x730 fs/buffer.c:1553
folio_invalidate mm/truncate.c:140 [inline]
truncate_cleanup_folio+0xcb/0x190 mm/truncate.c:160
truncate_inode_pages_range+0x2ce/0xe30 mm/truncate.c:404
inode_go_inval+0x13c/0x360 fs/gfs2/glops.c:366
do_xmote+0x289/0x760 fs/gfs2/glock.c:699
glock_work_func+0x2a8/0x580 fs/gfs2/glock.c:1011
process_one_work kernel/workqueue.c:3302 [inline]
process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385
worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466
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
INFO: task syz-executor:6864 blocked in I/O wait for more than 145 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22488 pid:6864 tgid:6864 ppid:1 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5354 [inline]
__schedule+0x165c/0x5520 kernel/sched/core.c:6966
__schedule_loop kernel/sched/core.c:7049 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7064
io_schedule+0x7f/0xd0 kernel/sched/core.c:7891
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
__wait_on_bit+0xb9/0x310 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
gfs2_evict_inode+0xbd2/0x12d0 fs/gfs2/super.c:1493
evict+0x61e/0xb10 fs/inode.c:841
free_local_statfs_inodes fs/gfs2/super.c:1532 [inline]
gfs2_put_super+0x635/0x860 fs/gfs2/super.c:632
generic_shutdown_super+0x13d/0x2d0 fs/super.c:646
kill_block_super+0x44/0x90 fs/super.c:1725
deactivate_locked_super+0xbc/0x130 fs/super.c:476
cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:269 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:328 [inline]
do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff64559da57
RSP: 002b:00007ffcf2581b78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007ff645632048 RCX: 00007ff64559da57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcf2581c30
RBP: 00007ffcf2581c30 R08: 00007ffcf2582c30 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf2582cc0
R13: 00007ff645632048 R14: 0000000000045ef6 R15: 00007ffcf2582d00
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by kworker/0:1H/1628:
#0: ffff8880347a4940 ((wq_completion)gfs2-glock/syz:syz){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3277 [inline]
#0: ffff8880347a4940 ((wq_completion)gfs2-glock/syz:syz){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3385
#1: ffffc90006437c40 ((work_completion)(&(&gl->gl_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3278 [inline]
#1: ffffc90006437c40 ((work_completion)(&(&gl->gl_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3385
2 locks held by getty/5599:
#0: ffff888037b110a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/6864:
#0: ffff88807bbfc0d8 (&type->s_umount_key#106){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88807bbfc0d8 (&type->s_umount_key#106){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff88807bbfc0d8 (&type->s_umount_key#106){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508
1 lock held by syz.8.750/9811:
#0: ffff88807bbfc0d8 (&type->s_umount_key#106){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
#0: ffff88807bbfc0d8 (&type->s_umount_key#106){++++}-{4:4}, at: super_lock+0x2d6/0x3d0 fs/super.c:122
1 lock held by syz.3.1002/11195:
#0: ffff88807bbfc0d8 (&type->s_umount_key#106){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
#0: ffff88807bbfc0d8 (&type->s_umount_key#106){++++}-{4:4}, at: super_lock+0x2d6/0x3d0 fs/super.c:122
2 locks held by dhcpcd/11341:
#0: ffff88807855fa40 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff88807855fa40 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: __sock_release net/socket.c:720 [inline]
#0: ffff88807855fa40 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: sock_close+0x9b/0x240 net/socket.c:1513
#1: ffffffff8e963568 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
#1: ffffffff8e963568 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770 kernel/rcu/tree_exp.h:961
1 lock held by dhcpcd/11349:
#0: ffff888035638260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline]
#0: ffff888035638260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xe10 net/packet/af_packet.c:3198
1 lock held by dhcpcd/11350:
#0: ffff8880629b8260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline]
#0: ffff8880629b8260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xe10 net/packet/af_packet.c:3198
1 lock held by dhcpcd/11351:
#0: ffff88802ac34260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline]
#0: ffff88802ac34260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xe10 net/packet/af_packet.c:3198
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
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+0xfd3/0x1030 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: 13 Comm: kworker/u8:1 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x35/0xb0 kernel/rcu/tree.c:752
Code: 05 d0 f7 90 11 e8 db 16 04 0a 89 c3 83 f8 08 73 65 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 90 e7 27 8e 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 cc 41 84 00 48 c7 c3 d8 79 3d 93
RSP: 0018:ffffc90000126ea0 EFLAGS: 00000802
RAX: 1ffffffff1c4fcf2 RBX: 0000000000000000 RCX: 0000000080000202
RDX: 0000000000000000 RSI: ffffffff8c287dc0 RDI: ffffffff8c287d80
RBP: ffffc900001270f0 R08: ffffffff9031b4f7 R09: 1ffffffff206369e
R10: dffffc0000000000 R11: fffffbfff206369f R12: 1ffff92000024dec
R13: dffffc0000000000 R14: ffffffff8e27e790 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff88812525c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558161cb8168 CR3: 000000007952c000 CR4: 00000000003526f0
Call Trace:
trace_irq_disable+0x3b/0x140 include/trace/events/preemptirq.h:36
__local_bh_enable_ip+0x71/0x130 kernel/softirq.c:432
spin_unlock_bh include/linux/spinlock.h:396 [inline]
cfg80211_inform_single_bss_data+0x13b9/0x1af0 net/wireless/scan.c:2388
cfg80211_inform_bss_data+0x266/0x3c40 net/wireless/scan.c:3226
cfg80211_inform_bss_frame_data+0x3c7/0x730 net/wireless/scan.c:3317
ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230
ieee80211_rx_bss_info net/mac80211/ibss.c:1088 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1569 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1901/0x2cb0 net/mac80211/ibss.c:1596
ieee80211_iface_process_skb net/mac80211/iface.c:1757 [inline]
ieee80211_iface_work+0x845/0x1380 net/mac80211/iface.c:1811
cfg80211_wiphy_work+0x2cf/0x460 net/wireless/core.c:513
process_one_work kernel/workqueue.c:3302 [inline]
process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385
worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466
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
----------------
Code disassembly (best guess):
0: 05 d0 f7 90 11 add $0x1190f7d0,%eax
5: e8 db 16 04 0a call 0xa0416e5
a: 89 c3 mov %eax,%ebx
c: 83 f8 08 cmp $0x8,%eax
f: 73 65 jae 0x76
11: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15
18: fc ff df
1b: 4c 8d 34 dd 90 e7 27 lea -0x71d81870(,%rbx,8),%r14
22: 8e
23: 4c 89 f0 mov %r14,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 4c 89 f7 mov %r14,%rdi
34: e8 cc 41 84 00 call 0x844205
39: 48 c7 c3 d8 79 3d 93 mov $0xffffffff933d79d8,%rbx