INFO: task syz.7.1044:11033 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.1044 state:D stack:24304 pid:11033 ppid:8304 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
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
check_journal_clean+0x191/0x300 fs/gfs2/util.c:76
init_journal+0x17f1/0x2260 fs/gfs2/ops_fstype.c:828
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: 0033:0x7f83f6f90eea
RSP: 002b:00007f83f7e14e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f83f7e14ef0 RCX: 00007f83f6f90eea
RDX: 0000200000021180 RSI: 0000200000000100 RDI: 00007f83f7e14eb0
RBP: 0000200000021180 R08: 00007f83f7e14ef0 R09: 0000000000000004
R10: 0000000000000004 R11: 0000000000000246 R12: 0000200000000100
R13: 00007f83f7e14eb0 R14: 00000000000211e7 R15: 0000200000000000
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#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
6 locks held by kworker/1:2/786:
#0: ffff888147244938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#0: ffff888147244938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
#1: ffffc90003947d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#1: ffffc90003947d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
#2: ffff888024aef190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:995 [inline]
#2: ffff888024aef190 (&dev->mutex){....}-{3:3}, at: hub_event+0x185/0x49c0 drivers/usb/core/hub.c:5861
#3: ffff88806b91b190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:995 [inline]
#3: ffff88806b91b190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x89/0x400 drivers/base/dd.c:1005
#4: ffff8880b8f2b718 (hrtimer_bases.lock){-.-.}-{2:2}, at: __run_hrtimer kernel/time/hrtimer.c:1754 [inline]
#4: ffff8880b8f2b718 (hrtimer_bases.lock){-.-.}-{2:2}, at: __hrtimer_run_queues+0x5e3/0xc40 kernel/time/hrtimer.c:1814
#5: ffffffff8cd49988 (tk_core.seq.seqcount){----}-{0:0}, at: timekeeping_get_delta kernel/time/timekeeping.c:254 [inline]
#5: ffffffff8cd49988 (tk_core.seq.seqcount){----}-{0:0}, at: timekeeping_get_ns kernel/time/timekeeping.c:388 [inline]
#5: ffffffff8cd49988 (tk_core.seq.seqcount){----}-{0:0}, at: ktime_get+0x7f/0x280 kernel/time/timekeeping.c:848
5 locks held by kworker/1:3/5151:
#0: ffff888147244938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#0: ffff888147244938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
#1: ffffc90003247d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#1: ffffc90003247d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
#2: ffff888025175190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:995 [inline]
#2: ffff888025175190 (&dev->mutex){....}-{3:3}, at: hub_event+0x185/0x49c0 drivers/usb/core/hub.c:5861
#3: ffff888062fc0190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:995 [inline]
#3: ffff888062fc0190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x89/0x400 drivers/base/dd.c:1005
#4: ffff888030c22160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:995 [inline]
#4: ffff888030c22160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x89/0x400 drivers/base/dd.c:1005
2 locks held by getty/5523:
#0: ffff8880316520a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000328b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x425/0x1380 drivers/tty/n_tty.c:2217
2 locks held by dhcpcd/7801:
#0: ffff888051910820 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#0: ffff888051910820 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline]
#0: ffff888051910820 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: sock_close+0x9b/0x230 net/socket.c:1421
#1: ffffffff8cd358f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#1: ffffffff8cd358f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x448/0x830 kernel/rcu/tree_exp.h:1004
1 lock held by syz.7.1044/11033:
#0: ffff88804ba6c0e0 (&type->s_umount_key#129){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88804ba6c0e0 (&type->s_umount_key#129){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88804ba6c0e0 (&type->s_umount_key#129){++++}-{3:3}, at: get_tree_bdev+0x344/0x510 fs/super.c:1589
2 locks held by kworker/u4:13/13154:
#0: ffff888019f49138 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#0: ffff888019f49138 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
#1: ffffc900035d7d00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#1: ffffc900035d7d00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
1 lock held by syz.2.1446/13365:
#0: ffff88804ba6c0e0 (&type->s_umount_key#129){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88804ba6c0e0 (&type->s_umount_key#129){++++}-{3:3}, at: super_lock+0x167/0x360 fs/super.c:117
2 locks held by dhcpcd/13447:
#0: ffff88806100fa20 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#0: ffff88806100fa20 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline]
#0: ffff88806100fa20 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: sock_close+0x9b/0x230 net/socket.c:1421
#1: ffffffff8cd358f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
#1: ffffffff8cd358f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x360/0x830 kernel/rcu/tree_exp.h:1004
5 locks held by dhcpcd-run-hook/13453:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 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: 13456 Comm: sed Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:131 [inline]
RIP: 0010:lock_release+0x557/0x8b0 kernel/locking/lockdep.c:5777
Code: c7 c7 60 ce aa 8a e8 88 0d 00 09 b8 ff ff ff ff 65 0f c1 05 d3 09 9b 7e 83 f8 01 75 75 48 c7 84 24 80 00 00 00 00 00 00 00 9c <8f> 84 24 80 00 00 00 f6 84 24 81 00 00 00 02 75 75 f7 44 24 50 00
RSP: 0000:ffffc900047af818 EFLAGS: 00000046
RAX: 0000000000000001 RBX: e01ed1fafb926b9f RCX: 80f305aff7fd0900
RDX: 0000000000000005 RSI: ffffffff8aaace60 RDI: ffffffff8afc6f80
RBP: ffffc900047af940 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: ffff888048e98ba8
R13: dffffc0000000000 R14: ffff888048e98ad0 R15: 1ffff920008f5f10
FS: 00007f6316362c80(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f63165769b0 CR3: 00000000684b7000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
_raw_spin_unlock+0x16/0x40 kernel/locking/spinlock.c:186
percpu_counter_add_batch+0x1be/0x280 lib/percpu_counter.c:98
percpu_counter_add include/linux/percpu_counter.h:69 [inline]
add_mm_counter include/linux/mm.h:2629 [inline]
set_pte_range+0x364/0x6a0 mm/memory.c:4404
filemap_map_order0_folio mm/filemap.c:3599 [inline]
filemap_map_pages+0xe9b/0x1950 mm/filemap.c:3660
do_fault_around mm/memory.c:4595 [inline]
do_read_fault mm/memory.c:4628 [inline]
do_fault mm/memory.c:4775 [inline]
do_pte_missing mm/memory.c:3689 [inline]
handle_pte_fault mm/memory.c:5047 [inline]
__handle_mm_fault mm/memory.c:5188 [inline]
handle_mm_fault+0x379b/0x4920 mm/memory.c:5353
do_user_addr_fault+0xad0/0x12e0 arch/x86/mm/fault.c:1324
handle_page_fault arch/x86/mm/fault.c:1465 [inline]
exc_page_fault+0x67/0x110 arch/x86/mm/fault.c:1521
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f63165769b0
Code: ff e0 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 8b 05 01 55 08 00 ff a0 98 03 00 00 0f 1f 00 <53> 89 fb 48 83 ec 10 e8 84 c9 ee ff 48 8b 05 25 54 08 00 bf 03 00
RSP: 002b:00007ffe9ad5ba38 EFLAGS: 00010206
RAX: 00007f63164397e8 RBX: 0000010bfe21dd3c RCX: 00007f63164397e8
RDX: 00007f63165769b0 RSI: 00007f63166f8980 RDI: 0000000000000001
RBP: 00007ffe9ad5bcf0 R08: 0000000000000000 R09: 000000000000000e
R10: fffffffffffff68e R11: 0000000000000206 R12: fffffffffffffff8
R13: 0000010bfdd8c73a R14: 0000000000000000 R15: 00007f6316705310