INFO: task kworker/0:1H:5222 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:26312 pid:5222 tgid:5222 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:72 [inline]
lock_buffer include/linux/buffer_head.h:432 [inline]
discard_buffer fs/buffer.c:1603 [inline]
block_invalidate_folio+0x370/0x730 fs/buffer.c:1660
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
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:3278 [inline]
process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3361
worker_thread+0xa53/0xfc0 kernel/workqueue.c:3442
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:5858 blocked for more than 144 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21192 pid:5858 tgid:5858 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
schedule_timeout+0xc3/0x2c0 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:100 [inline]
__wait_for_common kernel/sched/completion.c:121 [inline]
wait_for_common kernel/sched/completion.c:132 [inline]
wait_for_completion+0x2cc/0x5e0 kernel/sched/completion.c:153
__flush_work+0xa17/0xc50 kernel/workqueue.c:4330
gfs2_clear_rgrpd+0x117/0x740 fs/gfs2/rgrp.c:731
gfs2_put_super+0x7d1/0x890 fs/gfs2/super.c:637
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: 0033:0x7f8eddb9d9d7
RSP: 002b:00007fff3c620d18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f8eddc32050 RCX: 00007f8eddb9d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff3c620dd0
RBP: 00007fff3c620dd0 R08: 00007fff3c621dd0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff3c621e60
R13: 00007f8eddc32050 R14: 0000000000037d22 R15: 00007fff3c621ea0
Showing all locks held in the system:
4 locks held by kworker/u8:1/13:
1 lock held by khungtaskd/31:
#0: ffffffff8e75d0a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8e75d0a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8e75d0a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by kworker/0:1H/5222:
#0: ffff8880293a9d40 ((wq_completion)gfs2-glock/syz:syz
){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3253 [inline]
){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3361
#1: ffffc90003697c40 ((work_completion)(&(&gl->gl_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3254 [inline]
#1: ffffc90003697c40 ((work_completion)(&(&gl->gl_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3361
2 locks held by getty/5600:
#0: ffff8880375190a0 (&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/5848:
#0: ffffffff8e7632e8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
#0: ffffffff8e7632e8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770 kernel/rcu/tree_exp.h:961
1 lock held by syz-executor/5858:
#0: ffff888036ed60d8 (&type->s_umount_key#116){+.+.}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888036ed60d8 (&type->s_umount_key#116){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff888036ed60d8 (&type->s_umount_key#116){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508
3 locks held by kworker/u8:13/10425:
#0: ffff8880b863ae60 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150 kernel/sched/core.c:647
#1: ffff8880b8624588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880 kernel/sched/psi.c:933
#2: ffff88806eb30780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6443 [inline]
#2: ffff88806eb30780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: cfg80211_wiphy_work+0xb4/0x460 net/wireless/core.c:425
=============================================
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 02/12/2026
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: 6339 Comm: udevd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__zone_watermark_ok+0x341/0x400 mm/page_alloc.c:-1
Code: 8b 14 24 e9 54 fe ff ff 44 89 fe 48 c7 c7 c0 29 88 8e e8 42 54 ca 02 48 b9 00 00 00 00 00 fc ff df 48 8b 14 24 e9 7c fe ff ff <31> c0 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d e9 1a 58 92 09 cc
RSP: 0018:ffffc900032a7488 EFLAGS: 00000293
RAX: 1ffff11027fff832 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: ffff88813fffc140 RSI: 0000000000000003 RDI: ffff88813fffc140
RBP: ffff88813fffc190 R08: 0000000000000981 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1027fff901 R12: 0000000000000000
R13: 0000000000000002 R14: ffff88813fffc178 R15: 0000000000000000
FS: 00007f0fc77ba880(0000) GS:ffff88812544a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555574f00a68 CR3: 0000000078b5a000 CR4: 00000000003526f0
Call Trace:
zone_watermark_fast+0x162/0x230 mm/page_alloc.c:3665
get_page_from_freelist+0x5bf/0x2440 mm/page_alloc.c:3868
__alloc_frozen_pages_noprof+0x233/0x3d0 mm/page_alloc.c:5202
alloc_pages_mpol+0x235/0x490 mm/mempolicy.c:2484
folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2503
shmem_alloc_folio mm/shmem.c:1933 [inline]
shmem_alloc_and_add_folio+0x442/0xf80 mm/shmem.c:1975
shmem_get_folio_gfp+0x4d4/0x1420 mm/shmem.c:2552
shmem_get_folio mm/shmem.c:2658 [inline]
shmem_write_begin+0x16c/0x330 mm/shmem.c:3291
generic_perform_write+0x2e2/0x8f0 mm/filemap.c:4325
shmem_file_write_iter+0xf8/0x120 mm/shmem.c:3466
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0fc70a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffe348db130 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f0fc77ba880 RCX: 00007f0fc70a7407
RDX: 0000000000000028 RSI: 0000557c54e24f10 RDI: 0000000000000009
RBP: 0000557c54e24f10 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000028
R13: 0000557c54e127a0 R14: 00007f0fc71efea0 R15: 0000557c448bd9dd