INFO: task kworker/0:8:4420 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:8 state:D stack:21280 pid: 4420 ppid: 2 flags:0x00004000
Workqueue: gfs_recovery gfs2_recover_func
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11bb/0x4390 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+0x815/0xe00 mm/filemap.c:1356
wait_on_page_locked include/linux/pagemap.h:688 [inline]
gfs2_jhead_process_page+0x24e/0xbc0 fs/gfs2/lops.c:476
gfs2_find_jhead+0xec2/0x1000 fs/gfs2/lops.c:597
gfs2_recover_func+0x663/0x1bc0 fs/gfs2/recovery.c:462
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
INFO: task syz.7.429:6913 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.429 state:D stack:24800 pid: 6913 ppid: 4934 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11bb/0x4390 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+0x15e/0x200 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+0x1770/0x2220 fs/gfs2/ops_fstype.c:837
init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:891
gfs2_fill_super+0x1701/0x1f50 fs/gfs2/ops_fstype.c:1249
get_tree_bdev+0x3f1/0x610 fs/super.c:1325
gfs2_get_tree+0x4d/0x1e0 fs/gfs2/ops_fstype.c:1332
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x24a/0xa40 fs/namespace.c:3025
do_mount fs/namespace.c:3368 [inline]
__do_sys_mount fs/namespace.c:3576 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3553
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: 0033:0x7f629bb4b38a
RSP: 002b:00007f6299db0e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6299db0ef0 RCX: 00007f629bb4b38a
RDX: 0000200000037f40 RSI: 00002000000008c0 RDI: 00007f6299db0eb0
RBP: 0000200000037f40 R08: 00007f6299db0ef0 R09: 000000000101008a
R10: 000000000101008a R11: 0000000000000246 R12: 00002000000008c0
R13: 00007f6299db0eb0 R14: 0000000000037f9d R15: 0000200000000480
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c11c460 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by dhcpcd/3853:
#0: ffffffff8d237b88 (rtnl_mutex){+.+.}-{3:3}, at: __netlink_dump_start+0x11f/0x700 net/netlink/af_netlink.c:2352
2 locks held by getty/3951:
#0: ffff88814d00f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900026562e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158
2 locks held by kworker/0:8/4420:
#0: ffff88801d50f538 ((wq_completion)gfs_recovery){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc90003dafd00 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
1 lock held by syz.7.429/6913:
#0: ffff88804f8d80e0 (&type->s_umount_key#83/1){+.+.}-{3:3}, at: alloc_super+0x201/0x950 fs/super.c:229
1 lock held by syz.7.1081/10463:
#0: ffff88804f8d80e0 (&type->s_umount_key#84){++++}-{3:3}, at: iterate_supers+0xa4/0x1d0 fs/super.c:716
2 locks held by syz.3.1112/10682:
#0: ffff888073d58810 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#0: ffff888073d58810 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release net/socket.c:648 [inline]
#0: ffff888073d58810 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1336
#1: ffffffff8c120ee8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#1: ffffffff8c120ee8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x347/0x6b0 kernel/rcu/tree_exp.h:845
4 locks held by dhcpcd-run-hook/10700:
=============================================
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 08/14/2025
Call Trace:
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x397/0x3d0 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+0xe0f/0xe50 kernel/hung_task.c:369
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9589 Comm: kworker/u4:19 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025
Workqueue: bat_events batadv_tt_purge
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:88 [inline]
RIP: 0010:lock_acquire+0xfa/0x3f0 kernel/locking/lockdep.c:5599
Code: 84 17 02 00 00 48 c7 c0 44 c0 69 8d 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 06 02 00 00 83 3d 50 c7 0d 0c 00 0f 84 ef 00 00 00 <65> 8b 05 ff 7f a6 7e 85 c0 0f 85 2d 01 00 00 65 4c 8b 35 af 76 a6
RSP: 0018:ffffc90004f0fa80 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 46bef47dbab26b00
RDX: 0000000000000000 RSI: ffffffff8a59a220 RDI: ffffffff8a59a1e0
RBP: ffffc90004f0fb88 R08: dffffc0000000000 R09: fffffbfff1ad3196
R10: fffffbfff1ad3196 R11: 1ffffffff1ad3195 R12: ffff888066676a18
R13: 1ffff920009e1f5c R14: 0000000000000001 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeb4b00f2c CR3: 000000005aa69000 CR4: 00000000003506e0
DR0: 0000000000006a34 DR1: 0000000000000000 DR2: 000000000000000d
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
_raw_spin_lock_bh+0x32/0x50 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:368 [inline]
batadv_tt_global_purge net/batman-adv/translation-table.c:2294 [inline]
batadv_tt_purge+0x117/0x9f0 net/batman-adv/translation-table.c:3583
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287