INFO: task kworker/0:7:4265 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:7 state:D
stack:22096 pid: 4265 ppid: 2 flags:0x00004000
Workqueue: gfs_recovery gfs2_recover_func
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11c3/0x4350 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
io_schedule+0x7c/0xd0 kernel/sched/core.c:8503
wait_on_page_bit_common+0x8bf/0xeb0 mm/filemap.c:1356
wait_on_page_locked include/linux/pagemap.h:688 [inline]
gfs2_jhead_process_page+0x252/0xbf0 fs/gfs2/lops.c:476
gfs2_find_jhead+0xdaf/0xf00 fs/gfs2/lops.c:597
gfs2_recover_func+0x73a/0x1cd0 fs/gfs2/recovery.c:462
process_one_work+0x867/0xff0 kernel/workqueue.c:2310
worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
INFO: task syz.4.1277:9506 blocked for more than 147 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.1277 state:D stack:24880 pid: 9506 ppid: 4191 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11c3/0x4350 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
bit_wait+0xd/0xc0 kernel/sched/wait_bit.c:199
__wait_on_bit kernel/sched/wait_bit.c:49 [inline]
out_of_line_wait_on_bit+0x173/0x230 kernel/sched/wait_bit.c:64
wait_on_bit include/linux/wait_bit.h:76 [inline]
gfs2_recover_journal+0x104/0x150 fs/gfs2/recovery.c:579
init_journal+0x17fa/0x22d0 fs/gfs2/ops_fstype.c:837
init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:891
gfs2_fill_super+0x1671/0x1ea0 fs/gfs2/ops_fstype.c:1249
get_tree_bdev+0x3e6/0x610 fs/super.c:1336
gfs2_get_tree+0x4d/0x1e0 fs/gfs2/ops_fstype.c:1332
vfs_get_tree+0x88/0x270 fs/super.c:1541
do_new_mount+0x247/0xa40 fs/namespace.c:3034
do_mount fs/namespace.c:3377 [inline]
__do_sys_mount fs/namespace.c:3585 [inline]
__se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f5d9ce623ca
RSP: 002b:00007f5d9b0b8e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5d9b0b8ee0 RCX: 00007f5d9ce623ca
RDX: 0000200000037f40 RSI: 00002000000008c0 RDI: 00007f5d9b0b8ea0
RBP: 0000200000037f40 R08: 00007f5d9b0b8ee0 R09: 0000000001010084
R10: 0000000001010084 R11: 0000000000000246 R12: 00002000000008c0
R13: 00007f5d9b0b8ea0 R14: 0000000000037fd9 R15: 0000200000000480
Showing all locks held in the system:
2 locks held by kworker/u4:0/9:
1 lock held by khungtaskd/27:
#0:
ffffffff8c31ef60
(
rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kworker/u4:2/154:
2 locks held by getty/3941:
#0: ffff88814cd43098
(
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900025e62e8 (
&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x594/0x1a50 drivers/tty/n_tty.c:2158
2 locks held by kworker/0:7/4265:
#0: ffff88801dfe5138 ((wq_completion)gfs_recovery){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc9000330fd00 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
5 locks held by kworker/1:18/5832:
4 locks held by kworker/1:20/7453:
1 lock held by syz.4.1277/9506:
#0: ffff88804d3ac0e0 (&type->s_umount_key#129/1){+.+.}-{3:3}, at: alloc_super+0x200/0x970 fs/super.c:229
4 locks held by kworker/u4:5/11795:
#0: ffff888016dcd938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc90003e07d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2:
ffffffff8d441610
(pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x148/0xba0 net/core/net_namespace.c:589
#3: ffffffff8c3239e8
(rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
(rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d1/0x750 kernel/rcu/tree_exp.h:845
1 lock held by syz.9.1784/11973:
#0: ffff88804b3d1ab0
(&dev->mutex
){....}-{3:3}, at: device_lock include/linux/device.h:809 [inline]
){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1064 [inline]
){....}-{3:3}, at: device_release_driver_internal+0xa1/0x710 drivers/base/dd.c:1279
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xe1b/0xe60 kernel/hung_task.c:369
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Sending NMI from CPU 0 to CPUs 1:
wireguard: wg0: Handshake for peer 37 ([::1]:20002/0%0) did not complete after 5 seconds, retrying (try 2)
NMI backtrace for cpu 1
CPU: 1 PID: 20 Comm: ksoftirqd/1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:match_held_lock+0xb/0xb0 kernel/locking/lockdep.c:-1
Code: 00 75 cf 48 c7 c7 80 2a 2b 8a 48 c7 c6 c0 2a 2b 8a e8 e9 0f f5 ff 0f 0b eb b6 e8 f0 fa ff ff b9 01 00 00 00 48 39 77 10 74 6c <53> 81 7f 20 00 00 10 00 72 5f 48 8b 46 08 48 85 c0 75 17 48 89 fb
RSP: 0018:ffffc90000dd0d10 EFLAGS: 00000012
RAX: 0000000000000001 RBX: ffff888017970000 RCX: 0000000000000001
RDX: 0000000000010100 RSI: ffff8880b912a258 RDI: ffff888017970af0
RBP: 00000000ffffffff R08: ffffffff8d8b1eef R09: 1ffffffff1b163dd
R10: dffffc0000000000 R11: fffffbfff1b163de R12: 0000000000000000
R13: 0000000000000046 R14: ffff8880b912a258 R15: ffff888017970af0
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4cc53322a0 CR3: 0000000024b45000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_is_held kernel/locking/lockdep.c:5368 [inline]
lock_is_held_type+0xa6/0x190 kernel/locking/lockdep.c:5668
lock_is_held include/linux/lockdep.h:287 [inline]
__run_hrtimer kernel/time/hrtimer.c:1651 [inline]
__hrtimer_run_queues+0x28d/0xb60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x397/0x8b0 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
__sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:console_trylock_spinning+0x301/0x370 kernel/printk/printk.c:1909
Code: 85 db 74 89 e8 30 f2 18 00 fb 31 c0 eb 48 e8 26 f2 18 00 e8 71 12 61 08 48 85 db 74 d1 e8 17 f2 18 00 fb 48 c7 c7 a0 3a 31 8c <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 68 8a 22 60
RSP: 0018:ffffc90000da7640 EFLAGS: 00000246
RAX: ffffffff81602289 RBX: 0000000000000200 RCX: ffff888017970000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffffffff8c313aa0
RBP: ffffc90000da7710 R08: ffffffff901f1207 R09: 1ffffffff203e240
R10: dffffc0000000000 R11: fffffbfff203e241 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffff920001b4ec8
vprintk_emit+0xa7/0x150 kernel/printk/printk.c:2273
_printk+0xda/0x130 kernel/printk/printk.c:2299
__dynamic_pr_debug+0x196/0x240 lib/dynamic_debug.c:619
wg_expired_retransmit_handshake+0x288/0x2b0 drivers/net/wireguard/timers.c:65
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x56c/0x810 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
handle_softirqs+0x336/0x830 kernel/softirq.c:576
run_ksoftirqd+0xa4/0x100 kernel/softirq.c:943
smpboot_thread_fn+0x520/0x990 kernel/smpboot.c:164
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
virtqueue callback for ffff888146cdf600 (ffffffff8444ab50)
virtqueue interrupt with no work for ffff888146cdf500
virtqueue interrupt with no work for ffff888146cdf400
kcov: kcov_remote_start: handle = 100000000000003, context: softirq
kcov: kcov_start: t = ffff88801ead9dc0, size = 262144, area = ffffc900020d9000
kcov: kcov_move_area: ffffc90010c04000 1048576 <= ffffc900020d9000 37