INFO: task syz-executor:5832 blocked for more than 143 seconds.
      Not tainted 6.12.0-rc6-next-20241108-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21040 pid:5832  tgid:5832  ppid:1      flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6753
 __schedule_loop kernel/sched/core.c:6830 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6845
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6902
 rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
 __down_read_common kernel/locking/rwsem.c:1248 [inline]
 __down_read kernel/locking/rwsem.c:1261 [inline]
 down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
 __gfs2_trans_begin+0x55d/0x950 fs/gfs2/trans.c:87
 gfs2_trans_begin+0x71/0xe0 fs/gfs2/trans.c:118
 gfs2_write_jdata_batch fs/gfs2/aops.c:194 [inline]
 gfs2_write_cache_jdata+0x60e/0x1fa0 fs/gfs2/aops.c:323
 gfs2_jdata_writepages+0x85/0x160 fs/gfs2/aops.c:366
 gfs2_ail1_start_one fs/gfs2/log.c:134 [inline]
 gfs2_ail1_flush+0xb8b/0xf50 fs/gfs2/log.c:215
 gfs2_ail1_start fs/gfs2/log.c:246 [inline]
 empty_ail1_list+0x1a5/0x3c0 fs/gfs2/log.c:978
 gfs2_log_flush+0x20f2/0x2610 fs/gfs2/log.c:1130
 gfs2_kill_sb+0x5b/0x350 fs/gfs2/ops_fstype.c:1775
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
 task_work_run+0x24f/0x310 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4119b7fa47
RSP: 002b:00007ffcbdb41db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f4119b7fa47
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcbdb41e70
RBP: 00007ffcbdb41e70 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcbdb42ef0
R13: 00007f4119bf123c R14: 00000000000196e0 R15: 00007ffcbdb42f30
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc6-next-20241108-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
 watchdog+0xffb/0x1040 kernel/hung_task.c:397
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5879 Comm: kworker/0:5 Not tainted 6.12.0-rc6-next-20241108-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Workqueue: usb_hub_wq hub_event
RIP: 0010:check_preemption_disabled+0x7/0x120 lib/smp_processor_id.c:13
Code: c6 40 5b 60 8c eb 1c 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 41 54 53 <48> 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 65 8b 1d 0c
RSP: 0018:ffffc90004386e50 EFLAGS: 00000002
RAX: 0000000000000003 RBX: 00000085b10910e8 RCX: ffffffff9a3bf903
RDX: 0000000000000085 RSI: ffffffff8c605b40 RDI: ffffffff8c605b00
RBP: 000000000000017a R08: ffffffff854dddc4 R09: 1ffff11004978046
R10: dffffc0000000000 R11: ffffffff8bc2e8f0 R12: dffffc0000000000
R13: ffffffff9a3fff70 R14: 0000000000000899 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c697618a0 CR3: 0000000029a50000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 delay_tsc+0x6b/0xe0 arch/x86/lib/delay.c:90
 udelay include/asm-generic/delay.h:62 [inline]
 wait_for_lsr drivers/tty/serial/8250/8250_port.c:2093 [inline]
 serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3334 [inline]
 serial8250_console_write+0x1328/0x1ed0 drivers/tty/serial/8250/8250_port.c:3412
 console_emit_next_record kernel/printk/printk.c:3111 [inline]
 console_flush_all+0x869/0xeb0 kernel/printk/printk.c:3199
 __console_flush_and_unlock kernel/printk/printk.c:3258 [inline]
 console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3298
 vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2426
 dev_vprintk_emit+0x2ae/0x330 drivers/base/core.c:4935
 dev_printk_emit+0xdd/0x120 drivers/base/core.c:4946
 _dev_info+0x122/0x170 drivers/base/core.c:5004
 hub_port_init+0x7bf/0x2670 drivers/usb/core/hub.c:4950
 hub_port_connect drivers/usb/core/hub.c:5450 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
 port_event drivers/usb/core/hub.c:5821 [inline]
 hub_event+0x2962/0x5150 drivers/usb/core/hub.c:5903
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>