INFO: task syz-executor.0:5537 blocked for more than 143 seconds. Not tainted 6.2.0-rc1-syzkaller-dirty #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:20536 pid:5537 ppid:1 flags:0x00004006 Call Trace: __schedule+0x13ca/0x43c0 schedule+0xc3/0x190 schedule_timeout+0x1ae/0x300 gfs2_gl_hash_clear+0x192/0x300 gfs2_put_super+0x827/0x890 generic_shutdown_super+0x134/0x310 kill_block_super+0x7e/0xe0 deactivate_locked_super+0xa4/0x110 cleanup_mnt+0x490/0x520 task_work_run+0x24a/0x300 exit_to_user_mode_loop+0xd1/0xf0 exit_to_user_mode_prepare+0xb1/0x140 syscall_exit_to_user_mode+0x54/0x2d0 do_syscall_64+0x4d/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f2ca328d517 RSP: 002b:00007fffbdbebda8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f2ca328d517 RDX: 00007fffbdbebe79 RSI: 000000000000000a RDI: 00007fffbdbebe70 RBP: 00007fffbdbebe70 R08: 00000000ffffffff R09: 00007fffbdbebc40 R10: 0000555555f358b3 R11: 0000000000000246 R12: 00007f2ca32e6b24 R13: 00007fffbdbecf30 R14: 0000555555f35810 R15: 00007fffbdbecf70 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8cd26dd0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xce0 1 lock held by rcu_tasks_trace/13: #0: ffffffff8cd275d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xce0 1 lock held by khungtaskd/28: #0: ffffffff8cd26c00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/4747: #0: ffff88814b7d0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 #1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1630 1 lock held by syz-executor.0/5537: #0: ffff888078e920e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: deactivate_super+0xad/0xf0 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc1-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: dump_stack_lvl+0x1b5/0x2a0 nmi_cpu_backtrace+0x47b/0x500 nmi_trigger_cpumask_backtrace+0x1d3/0x430 watchdog+0xf70/0xfb0 kthread+0x270/0x300 ret_from_fork+0x1f/0x30 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted 6.2.0-rc1-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:cpus_read_lock+0x0/0x130 Code: 09 66 0f 1f 84 00 00 00 00 00 66 0f 1f 00 e8 87 fe 37 00 48 c7 c7 a0 36 bc 8c e9 2b 51 49 09 66 2e 0f 1f 84 00 00 00 00 00 90 0f 1e fa 53 e8 66 fe 37 00 48 c7 c7 20 6e c9 8a be 31 00 00 00 RSP: 0018:ffffc90000107b68 EFLAGS: 00000293 RAX: ffffffff81b6e94d RBX: ffffffff91869260 RCX: ffff88801237ba80 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff91869260 RBP: ffffc90000107c50 R08: ffffffff81dfd0bb R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff1100243a983 R14: ffffffff918c86e0 R15: 1ffff92000020f70 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055816f4e6600 CR3: 000000000ca8e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: static_key_disable+0x12/0x20 toggle_allocation_gate+0x1a9/0x240 process_one_work+0x96c/0x13e0 worker_thread+0xa63/0x1210 kthread+0x270/0x300 ret_from_fork+0x1f/0x30