INFO: task syz-executor405:4172 blocked for more than 143 seconds.
      Not tainted 5.15.179-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor405 state:D stack:23232 pid: 4172 ppid:  4169 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5029 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6375
 schedule+0x11b/0x1f0 kernel/sched/core.c:6458
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1890
 do_wait_for_common+0x2d9/0x480 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x48/0x60 kernel/sched/completion.c:138
 kthread_stop+0x178/0x580 kernel/kthread.c:666
 gfs2_make_fs_ro+0x14d/0x5f0 fs/gfs2/super.c:533
 signal_our_withdraw fs/gfs2/util.c:166 [inline]
 gfs2_withdraw+0x5fb/0x14e0 fs/gfs2/util.c:343
 gfs2_metatype_check_ii+0x75/0x90 fs/gfs2/util.c:520
 gfs2_metatype_check_i fs/gfs2/util.h:129 [inline]
 gfs2_quota_init+0xe06/0x1110 fs/gfs2/quota.c:1406
 gfs2_make_fs_rw+0x436/0x5b0 fs/gfs2/super.c:155
 gfs2_fill_super+0x23e8/0x2750 fs/gfs2/ops_fstype.c:1276
 get_tree_bdev+0x3fe/0x620 fs/super.c:1325
 gfs2_get_tree+0x50/0x210 fs/gfs2/ops_fstype.c:1332
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x2ba/0xb40 fs/namespace.c:3012
 do_mount fs/namespace.c:3355 [inline]
 __do_sys_mount fs/namespace.c:3563 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3540
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f945e789f5a
RSP: 002b:00007ffc88f5c5c8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffc88f5c5e0 RCX: 00007f945e789f5a
RDX: 0000200000000400 RSI: 0000200000012500 RDI: 00007ffc88f5c5e0
RBP: 0000200000012500 R08: 00007ffc88f5c620 R09: 00000000000125b5
R10: 0000000000000000 R11: 0000000000000282 R12: 0000200000000400
R13: 00007ffc88f5c620 R14: 0000000000000003 R15: 0000000000000000
 </TASK>
INFO: task gfs2_quotad:4182 blocked for more than 144 seconds.
      Not tainted 5.15.179-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:gfs2_quotad     state:D
 stack:25592 pid: 4182 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5029 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6375
 schedule+0x11b/0x1f0 kernel/sched/core.c:6458
 bit_wait+0xe/0xc0 kernel/sched/wait_bit.c:199
 __wait_on_bit+0xb9/0x180 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0x1d0/0x250 kernel/sched/wait_bit.c:64
 wait_on_bit include/linux/wait_bit.h:76 [inline]
 __gfs2_glock_dq+0x699/0x9e0 fs/gfs2/glock.c:1588
 gfs2_glock_dq fs/gfs2/glock.c:1652 [inline]
 gfs2_glock_dq_uninit+0x51/0x110 fs/gfs2/glock.c:1672
 gfs2_statfs_sync+0x7d5/0x860 fs/gfs2/super.c:310
 quotad_check_timeo fs/gfs2/quota.c:1519 [inline]
 gfs2_quotad+0x3a8/0x900 fs/gfs2/quota.c:1581
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: 
ffffffff8cb1f4e0
 (
rcu_read_lock
){....}-{1:2}
, at: rcu_lock_acquire+0x0/0x30
1 lock held by udevd/3546:
 #0: ffff888020af6118
 (
&disk->open_mutex
){+.+.}-{3:3}
, at: blkdev_get_by_dev+0x14d/0xa50 block/bdev.c:820
2 locks held by getty/3924:
 #0: 
ffff88814c927098
 (
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: 
ffffc90002cd62e8
 (
&ldata->atomic_read_lock
){+.+.}-{3:3}
, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158
1 lock held by syz-executor405/4172:
 #0: 
ffff88802b1da0e0
 (
&type->s_umount_key
#42
/1
){+.+.}-{3:3}
, at: alloc_super+0x210/0x940 fs/super.c:229
2 locks held by syz-executor405/4684:
1 lock held by syz-executor405/4685:
 #0: 
ffff88807db240e0
 (
&type->s_umount_key
#42
/1
){+.+.}-{3:3}
, at: alloc_super+0x210/0x940 fs/super.c:229
2 locks held by syz-executor405/4686:
 #0: 
ffff888020af7d18
 (
&disk->open_mutex
){+.+.}-{3:3}
, at: blkdev_put+0xfb/0x790 block/bdev.c:915
 #1: 
ffff888147570468
 (
&lo->lo_mutex
){+.+.}-{3:3}
, at: lo_release+0x4d/0x1f0 drivers/block/loop.c:2070
2 locks held by syz-executor405/4687:
 #0: 
ffff888020b00518
 (
&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xfb/0x790 block/bdev.c:915
 #1: ffff888147573468 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_release+0x4d/0x1f0 drivers/block/loop.c:2070

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 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+0xe72/0xeb0 kernel/hung_task.c:369
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:108 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:562