INFO: task kworker/0:3:5813 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:3 state:D stack:21576 pid:5813 ppid:2 flags:0x00004000
Workqueue: gfs2_recovery gfs2_recover_func
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
io_schedule+0x80/0xd0 kernel/sched/core.c:9022
folio_wait_bit_common+0x6eb/0xf70 mm/filemap.c:1329
folio_wait_locked include/linux/pagemap.h:1149 [inline]
gfs2_jhead_process_page+0x17a/0x700 fs/gfs2/lops.c:477
gfs2_find_jhead+0xbe5/0xd20 fs/gfs2/lops.c:594
gfs2_recover_func+0x688/0x1c60 fs/gfs2/recovery.c:460
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
INFO: task syz.2.45:6049 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.45 state:D stack:24656 pid:6049 ppid:5763 flags:0x00004006
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_recover_journal+0xda/0x130 fs/gfs2/recovery.c:577
init_journal+0x17c5/0x2260 fs/gfs2/ops_fstype.c:833
init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:886
gfs2_fill_super+0x1815/0x1f80 fs/gfs2/ops_fstype.c:1266
get_tree_bdev+0x3e4/0x510 fs/super.c:1591
gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1344
vfs_get_tree+0x8c/0x280 fs/super.c:1764
do_new_mount+0x24b/0xa40 fs/namespace.c:3386
do_mount fs/namespace.c:3726 [inline]
__do_sys_mount fs/namespace.c:3935 [inline]
__se_sys_mount+0x2da/0x3c0 fs/namespace.c:3912
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: 0033:0x7f41c0790eea
RSP: 002b:00007f41c160de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f41c160def0 RCX: 00007f41c0790eea
RDX: 0000200000037f40 RSI: 00002000000008c0 RDI: 00007f41c160deb0
RBP: 0000200000037f40 R08: 00007f41c160def0 R09: 0000000001010084
R10: 0000000001010084 R11: 0000000000000246 R12: 00002000000008c0
R13: 00007f41c160deb0 R14: 0000000000037f4e R15: 0000200000000480
Showing all locks held in the system:
2 locks held by kworker/0:0/8:
1 lock held by ksoftirqd/0/16:
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
2 locks held by kworker/u4:8/2946:
#0: ffff8880b8e3c018 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:566
#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 locks held by kworker/u4:9/2963:
#0: ffff888018b0f938 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#0: ffff888018b0f938 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
#1: ffffc9000bf67d00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#1: ffffc9000bf67d00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
2 locks held by getty/5529:
#0: ffff88802cb540a0 (&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
2 locks held by kworker/1:3/5769:
#0: ffff888017872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#0: ffff888017872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
#1: ffffc9000470fd00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#1: ffffc9000470fd00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
2 locks held by kworker/0:3/5813:
#0: ffff88801e2a1538 ((wq_completion)gfs2_recovery){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#0: ffff88801e2a1538 ((wq_completion)gfs2_recovery){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
#1: ffffc9000499fd00 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#1: ffffc9000499fd00 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
1 lock held by syz.2.45/6049:
#0: ffff88801c71c0e0 (&type->s_umount_key#78){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88801c71c0e0 (&type->s_umount_key#78){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88801c71c0e0 (&type->s_umount_key#78){++++}-{3:3}, at: get_tree_bdev+0x344/0x510 fs/super.c:1589
1 lock held by syz.3.125/6613:
#0: ffff88801c71c0e0 (&type->s_umount_key#78){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88801c71c0e0 (&type->s_umount_key#78){++++}-{3:3}, at: super_lock+0x167/0x360 fs/super.c:117
1 lock held by syz.3.125/6624:
#0: ffff88801c71c0e0 (&type->s_umount_key#78){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88801c71c0e0 (&type->s_umount_key#78){++++}-{3:3}, at: super_lock+0x167/0x360 fs/super.c:117
1 lock held by syz.4.147/6777:
#0: ffff88801c71c0e0 (&type->s_umount_key#78){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88801c71c0e0 (&type->s_umount_key#78){++++}-{3:3}, at: super_lock+0x167/0x360 fs/super.c:117
1 lock held by syz.4.147/6779:
#0: ffff88801c71c0e0 (&type->s_umount_key#78){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88801c71c0e0 (&type->s_umount_key#78){++++}-{3:3}, at: super_lock+0x167/0x360 fs/super.c:117
1 lock held by syz.5.314/7593:
#0: ffff88801c71c0e0 (&type->s_umount_key#78){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88801c71c0e0 (&type->s_umount_key#78){++++}-{3:3}, at: super_lock+0x167/0x360 fs/super.c:117
2 locks held by kworker/u4:15/7695:
1 lock held by syz.7.384/7877:
#0: ffffffff8cd358f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#0: ffffffff8cd358f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x448/0x830 kernel/rcu/tree_exp.h:1004
1 lock held by syz.0.387/7910:
=============================================
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: 7877 Comm: syz.7.384 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:check_preemption_disabled+0x2e/0x110 lib/smp_processor_id.c:55
Code: 56 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 65 8b 05 2d 29 9c 75 65 8b 0d 22 29 9c 75 f7 c1 ff ff ff 7f 74 1f <65> 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 48 83
RSP: 0018:ffffc900039874e8 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000080000000
RDX: 0000000000000000 RSI: ffffffff8aaace60 RDI: ffffffff8afc6f80
RBP: ffffc90003987628 R08: dffffc0000000000 R09: 1ffffffff21b28bf
R10: dffffc0000000000 R11: fffffbfff21b28c0 R12: 1ffff92000730eb0
R13: ffff8880b8f37d68 R14: 0000000000000046 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005617561b05f8 CR3: 0000000061132000 CR4: 00000000003506e0
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
lock_acquire+0x1a7/0x410 kernel/locking/lockdep.c:5756
local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
refill_obj_stock+0x109/0x680 mm/memcontrol.c:3366
memcg_slab_free_hook+0x125/0x1f0 mm/slab.h:576
slab_free mm/slub.c:3825 [inline]
kmem_cache_free+0xe1/0x280 mm/slub.c:3852
vma_lock_free kernel/fork.c:472 [inline]
__vm_area_free+0xe4/0x110 kernel/fork.c:528
remove_vma mm/mmap.c:146 [inline]
exit_mmap+0x5e5/0xb50 mm/mmap.c:3326
__mmput+0x118/0x3c0 kernel/fork.c:1355
exit_mm+0x1da/0x2c0 kernel/exit.c:569
do_exit+0x88e/0x23c0 kernel/exit.c:870
do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
get_signal+0x12fc/0x1400 kernel/signal.c:2902
arch_do_signal_or_restart+0x9c/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f40d5590eea
Code: Unable to access opcode bytes at 0x7f40d5590ec0.
RSP: 002b:00007f40d640de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: 0000000000000000 RBX: 00007f40d640def0 RCX: 00007f40d5590eea
RDX: 0000200000000080 RSI: 0000200000000000 RDI: 00007f40d640deb0
RBP: 0000200000000080 R08: 00007f40d640def0 R09: 0000000000000016
R10: 0000000000000016 R11: 0000000000000246 R12: 0000200000000000
R13: 00007f40d640deb0 R14: 0000000000005104 R15: 00002000000002c0