INFO: task kworker/0:2H:6089 blocked for more than 144 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2H state:D stack:26176 pid:6089 tgid:6089 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: gfs2-glock/syz:syz glock_work_func
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0x15dd/0x52d0 kernel/sched/core.c:6908
__schedule_loop kernel/sched/core.c:6990 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7005
io_schedule+0x7f/0xd0 kernel/sched/core.c:7832
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
inode_go_inval+0x13c/0x360 fs/gfs2/glops.c:366
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:3275 [inline]
process_scheduled_works+0xb02/0x1830 kernel/workqueue.c:3358
worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz-executor:17848 blocked for more than 145 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21520 pid:17848 tgid:17848 ppid:1 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0x15dd/0x52d0 kernel/sched/core.c:6908
__schedule_loop kernel/sched/core.c:6990 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7005
io_schedule+0x7f/0xd0 kernel/sched/core.c:7832
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
__wait_on_bit+0xb9/0x310 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
gfs2_evict_inode+0x525/0x1050 fs/gfs2/super.c:1446
evict+0x61e/0xb10 fs/inode.c:846
free_local_statfs_inodes fs/gfs2/super.c:1485 [inline]
gfs2_put_super+0x635/0x860 fs/gfs2/super.c:632
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:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc6c9b9d9d7
RSP: 002b:00007ffe671f72b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fc6c9c31f90 RCX: 00007fc6c9b9d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe671f7370
RBP: 00007ffe671f7370 R08: 00007ffe671f8370 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe671f8400
R13: 00007fc6c9c31f90 R14: 00000000001aca6d R15: 00007ffe671f8440
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/5574:
#0: ffff888031b280a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5802:
2 locks held by kworker/0:2H/6089:
#0: ffff8880584acd48 ((wq_completion)gfs2-glock/syz:syz){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3250 [inline]
#0: ffff8880584acd48 ((wq_completion)gfs2-glock/syz:syz){+.+.}-{0:0}, at: process_scheduled_works+0x9ea/0x1830 kernel/workqueue.c:3358
#1: ffffc90004887c40 ((work_completion)(&(&gl->gl_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3251 [inline]
#1: ffffc90004887c40 ((work_completion)(&(&gl->gl_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa25/0x1830 kernel/workqueue.c:3358
2 locks held by syz-executor/14406:
#0: ffff888052a260e0 (&type->s_umount_key#74){+.+.}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888052a260e0 (&type->s_umount_key#74){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff888052a260e0 (&type->s_umount_key#74){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508
#1: ffffffff8e766578 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
#1: ffffffff8e766578 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770 kernel/rcu/tree_exp.h:961
1 lock held by syz-executor/17848:
#0: ffff888055a140e0 (&type->s_umount_key#114){+.+.}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888055a140e0 (&type->s_umount_key#114){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff888055a140e0 (&type->s_umount_key#114){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508
4 locks held by kworker/u9:4/19203:
#0: ffff888024cef948 ((wq_completion)hci0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3250 [inline]
#0: ffff888024cef948 ((wq_completion)hci0){+.+.}-{0:0}, at: process_scheduled_works+0x9ea/0x1830 kernel/workqueue.c:3358
#1: ffffc90006717c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3251 [inline]
#1: ffffc90006717c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa25/0x1830 kernel/workqueue.c:3358
#2: ffff88809d374ec0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d3/0x400 net/bluetooth/hci_sync.c:331
#3: ffff88809d3740c0 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0xa6f/0x1190 net/bluetooth/hci_sync.c:5734
1 lock held by syz-executor/19646:
#0: ffffffff8e766578 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
#0: ffffffff8e766578 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770 kernel/rcu/tree_exp.h:961
3 locks held by dhcpcd-run-hook/24469:
#0: ffff8880b863ade0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb6/0x150 kernel/sched/core.c:655
#1: ffffffff9a2b9508 (&____s->seqcount#2){----}-{0:0}, at: ktime_get_real_ts64+0xa9/0x3c0 kernel/time/timekeeping.c:802
#2: ffff88802821f498 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:341 [inline]
#2: ffff88802821f498 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:402
1 lock held by sed/24477:
=============================================
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:161 [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:346 [inline]
watchdog+0xfd9/0x1030 kernel/hung_task.c:515
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x51e/0xb90 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: 24469 Comm: dhcpcd-run-hook 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:__seqprop_sequence include/linux/seqlock.h:212 [inline]
RIP: 0010:folio_needs_cow_for_dma+0x4f/0x240 include/linux/mm.h:2381
Code: f5 49 c1 ed 03 43 80 7c 25 00 00 74 08 4c 89 f7 e8 56 df 18 00 41 bf c0 04 00 00 4d 03 3e 4c 89 f8 48 c1 e8 03 42 0f b6 04 20 <84> c0 0f 85 72 01 00 00 41 8b 2f 89 ee 83 e6 01 31 ff e8 2a a0 ae
RSP: 0018:ffffc900046ff2e8 EFLAGS: 00000216
RAX: 0000000000000000 RBX: ffffea00013cfd80 RCX: ffff888032448000
RDX: 0000000000000000 RSI: ffffea00013cfd80 RDI: ffff8880a0544140
RBP: ffffc900046ff5b0 R08: ffff8880a05480a3 R09: 1ffff110140a9014
R10: dffffc0000000000 R11: ffffed10140a9015 R12: dffffc0000000000
R13: 1ffff110140a882a R14: ffff8880a0544150 R15: ffff888051197300
FS: 00007fe94140ec80(0000) GS:ffff888125461000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a987c99be0 CR3: 00000000834da000 CR4: 0000000000350ef0
Call Trace:
__folio_try_dup_anon_rmap include/linux/rmap.h:586 [inline]
folio_try_dup_anon_rmap_pte include/linux/rmap.h:668 [inline]
copy_present_ptes mm/memory.c:1179 [inline]
copy_pte_range mm/memory.c:1317 [inline]
copy_pmd_range+0x10bd/0x8050 mm/memory.c:1405
copy_pud_range mm/memory.c:1442 [inline]
copy_p4d_range mm/memory.c:1466 [inline]
copy_page_range+0xbe8/0x11f0 mm/memory.c:1552
dup_mmap+0xf40/0x1d90 mm/mmap.c:1841
dup_mm kernel/fork.c:1530 [inline]
copy_mm+0x13b/0x4b0 kernel/fork.c:1582
copy_process+0x18b6/0x3cf0 kernel/fork.c:2223
kernel_clone+0x248/0x8e0 kernel/fork.c:2654
__do_sys_clone kernel/fork.c:2795 [inline]
__se_sys_clone kernel/fork.c:2779 [inline]
__x64_sys_clone+0x1b6/0x230 kernel/fork.c:2779
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe9415a8636
Code: 89 df e8 6d e8 f6 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 52 89 c5 85 c0 75 31 64 48 8b 04 25 10 00 00
RSP: 002b:00007fffd8a77070 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fffd8a77078 RCX: 00007fe9415a8636
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 000055a987c94e60 R08: 0000000000000000 R09: 3c00000040001201
R10: 00007fe94140ef50 R11: 0000000000000246 R12: 000055a987c983a8
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000