INFO: task kworker/0:3:5780 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:3 state:D stack:22056 pid:5780 ppid:2 flags:0x00004000
Workqueue: gfs2_recovery gfs2_recover_func
Call Trace:
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0x156f/0x4720 kernel/sched/core.c:6722
schedule+0xbd/0x170 kernel/sched/core.c:6796
io_schedule+0x80/0xd0 kernel/sched/core.c:9075
folio_wait_bit_common+0x886/0xff0 mm/filemap.c:1329
folio_wait_locked include/linux/pagemap.h:1149 [inline]
gfs2_jhead_process_page+0x17e/0x750 fs/gfs2/lops.c:477
gfs2_find_jhead+0xc84/0xdc0 fs/gfs2/lops.c:594
gfs2_recover_func+0x6cd/0x1c80 fs/gfs2/recovery.c:460
process_one_work kernel/workqueue.c:2657 [inline]
process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734
worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815
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
INFO: task syz.8.3272:20677 blocked for more than 146 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.3272 state:D stack:24688 pid:20677 ppid:20389 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0x156f/0x4720 kernel/sched/core.c:6722
schedule+0xbd/0x170 kernel/sched/core.c:6796
bit_wait+0x13/0x100 kernel/sched/wait_bit.c:199
__wait_on_bit+0x9f/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x13c/0x190 kernel/sched/wait_bit.c:64
wait_on_bit include/linux/wait_bit.h:76 [inline]
gfs2_recover_journal+0xda/0x130 fs/gfs2/recovery.c:577
init_journal+0x1838/0x22f0 fs/gfs2/ops_fstype.c:833
init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:886
gfs2_fill_super+0x1828/0x1f90 fs/gfs2/ops_fstype.c:1266
get_tree_bdev+0x3e5/0x520 fs/super.c:1602
gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1344
vfs_get_tree+0x8c/0x280 fs/super.c:1775
do_new_mount+0x24a/0xa60 fs/namespace.c:3412
do_mount fs/namespace.c:3780 [inline]
__do_sys_mount fs/namespace.c:3989 [inline]
__se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3966
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f713c5aa77a
RSP: 002b:00007f713d397e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f713d397ee0 RCX: 00007f713c5aa77a
RDX: 00002000000004c0 RSI: 0000200000001380 RDI: 00007f713d397ea0
RBP: 00002000000004c0 R08: 00007f713d397ee0 R09: 0000000000000010
R10: 0000000000000010 R11: 0000000000000246 R12: 0000200000001380
R13: 00007f713d397ea0 R14: 0000000000037fcc R15: 00002000000013c0
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e1322e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff8e1322e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff8e1322e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6669
2 locks held by getty/5545:
#0: ffff88802e9570a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000327e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x43a/0x1400 drivers/tty/n_tty.c:2217
2 locks held by kworker/0:3/5780:
#0: ffff888019be4d38 ((wq_completion)gfs2_recovery){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2632 [inline]
#0: ffff888019be4d38 ((wq_completion)gfs2_recovery){+.+.}-{0:0}, at: process_scheduled_works+0x975/0x1600 kernel/workqueue.c:2734
#1: ffffc900044dfd00 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2632 [inline]
#1: ffffc900044dfd00 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_scheduled_works+0x975/0x1600 kernel/workqueue.c:2734
2 locks held by kworker/0:4/5792:
#0: ffff888018c72d38 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2632 [inline]
#0: ffff888018c72d38 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x975/0x1600 kernel/workqueue.c:2734
#1: ffffc900045cfd00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2632 [inline]
#1: ffffc900045cfd00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x975/0x1600 kernel/workqueue.c:2734
3 locks held by kworker/0:8/14186:
#0: ffff888145658538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2632 [inline]
#0: ffff888145658538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x975/0x1600 kernel/workqueue.c:2734
#1: ffffc900044efd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2632 [inline]
#1: ffffc900044efd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x975/0x1600 kernel/workqueue.c:2734
#2: ffff8880263aa1d8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1094 [inline]
#2: ffff8880263aa1d8 (&dev->mutex){....}-{3:3}, at: hub_event+0x188/0x4a80 drivers/usb/core/hub.c:5871
3 locks held by kworker/u4:17/17260:
#0: ffff888018c71938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2632 [inline]
#0: ffff888018c71938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x975/0x1600 kernel/workqueue.c:2734
#1: ffffc90003777d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2632 [inline]
#1: ffffc90003777d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x975/0x1600 kernel/workqueue.c:2734
#2: ffffffff8f3e83c8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:286
1 lock held by syz-executor/20067:
#0: ffffffff8e137cb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
#0: ffffffff8e137cb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3da/0x880 kernel/rcu/tree_exp.h:1004
1 lock held by syz.8.3272/20677:
#0: ffff88807d6d20e0 (&type->s_umount_key#119){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807d6d20e0 (&type->s_umount_key#119){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807d6d20e0 (&type->s_umount_key#119){++++}-{3:3}, at: get_tree_bdev+0x345/0x520 fs/super.c:1600
1 lock held by syz.9.3487/21920:
#0: ffff88807d6d20e0 (&type->s_umount_key#119){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88807d6d20e0 (&type->s_umount_key#119){++++}-{3:3}, at: super_lock+0x189/0x390 fs/super.c:117
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Call Trace:
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a6/0x3e0 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+0xf59/0xfa0 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 17 Comm: rcu_preempt Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
RIP: 0010:task_irq_context kernel/locking/lockdep.c:4635 [inline]
RIP: 0010:__lock_acquire+0x56d/0x7eb0 kernel/locking/lockdep.c:5108
Code: 00 00 42 80 3c 00 00 74 12 48 89 df e8 9c ff 77 00 49 b8 00 00 00 00 00 fc ff df 48 89 9c 24 90 00 00 00 48 8b 45 10 48 89 03 <65> 8b 05 88 9e 99 7e 31 db 85 c0 0f 95 c3 01 db 48 8b 44 24 30 4c
RSP: 0018:ffffc900001676c0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88801e268b00 RCX: 1ffff11003c4d161
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff88801e268af0
RBP: ffffc90000167908 R08: dffffc0000000000 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1f1bb4e R12: ffff88801e268af8
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055db2cfed138 CR3: 000000000df32000 CR4: 00000000003506f0
Call Trace:
lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5790
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xb4/0x100 kernel/locking/spinlock.c:162
__debug_object_init+0x5c/0x450 lib/debugobjects.c:670
init_timer_on_stack_key kernel/time/timer.c:805 [inline]
schedule_timeout+0x131/0x2d0 kernel/time/timer.c:2166
rcu_gp_fqs_loop+0x30d/0x15e0 kernel/rcu/tree.c:1667
rcu_gp_kthread+0x9e/0x400 kernel/rcu/tree.c:1866
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