Warning: Permanently added '10.128.0.104' (ED25519) to the list of known hosts.
executing program
[  107.529923][ T4045] loop0: detected capacity change from 0 to 32768
[  284.673613][   T27] INFO: task kworker/u4:1:136 blocked for more than 143 seconds.
[  284.675903][   T27]       Not tainted 5.15.185-syzkaller #0
[  284.677408][   T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  284.679647][   T27] task:kworker/u4:1    state:D stack:    0 pid:  136 ppid:     2 flags:0x00000008
[  284.682027][   T27] Workqueue: writeback wb_workfn (flush-7:0)
[  284.684166][   T27] Call trace:
[  284.685042][   T27]  __switch_to+0x2f4/0x558
[  284.686226][   T27]  __schedule+0xe00/0x1c0c
[  284.687400][   T27]  schedule+0x11c/0x1c8
[  284.688500][   T27]  schedule_preempt_disabled+0x18/0x2c
[  284.689964][   T27]  __mutex_lock_common+0xa9c/0x1edc
[  284.691316][   T27]  mutex_lock_nested+0xac/0x11c
[  284.692584][   T27]  jfs_commit_inode+0x19c/0x498
[  284.694669][   T27]  jfs_write_inode+0x128/0x1f8
[  284.695908][   T27]  __writeback_single_inode+0x560/0x11f0
[  284.697364][   T27]  writeback_sb_inodes+0x7fc/0x1378
[  284.698722][   T27]  __writeback_inodes_wb+0x110/0x394
[  284.700081][   T27]  wb_writeback+0x3ec/0xe44
[  284.701243][   T27]  wb_workfn+0xa7c/0xdd8
[  284.702349][   T27]  process_one_work+0x79c/0x1140
[  284.704388][   T27]  worker_thread+0x8f4/0x101c
[  284.705726][   T27]  kthread+0x374/0x454
[  284.706815][   T27]  ret_from_fork+0x10/0x20
[  284.708047][   T27] 
[  284.708047][   T27] Showing all locks held in the system:
[  284.710083][   T27] 1 lock held by khungtaskd/27:
[  284.711385][   T27]  #0: ffff8000143311e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44
[  284.714590][   T27] 4 locks held by kworker/u4:1/136:
[  284.715968][   T27]  #0: ffff0000c2073938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x678/0x1140
[  284.718815][   T27]  #1: ffff80001b767c00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140
[  284.722029][   T27]  #2: ffff0000dcc280e0 (&type->s_umount_key#41){.+.+}-{3:3}, at: trylock_super+0x24/0xf4
[  284.725167][   T27]  #3: ffff0000d436b008 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_commit_inode+0x19c/0x498
[  284.727931][   T27] 2 locks held by getty/3797:
[  284.729140][   T27]  #0: ffff0000d35a2098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50
[  284.731728][   T27]  #1: ffff80001bc6b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2f0/0xf6c
[  284.734997][   T27] 4 locks held by syz-executor257/4045:
[  284.736509][   T27] 
[  284.737126][   T27] =============================================
[  284.737126][   T27] 
[  284.739340][   T27] Kernel panic - not syncing: hung_task: blocked tasks
[  284.741090][   T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.185-syzkaller #0
[  284.743161][   T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[  284.745877][   T27] Call trace:
[  284.746749][   T27]  dump_backtrace+0x0/0x43c
[  284.747979][   T27]  show_stack+0x2c/0x3c
[  284.749102][   T27]  __dump_stack+0x30/0x40
[  284.750309][   T27]  dump_stack_lvl+0xf8/0x160
[  284.751575][   T27]  dump_stack+0x1c/0x5c
[  284.752693][   T27]  panic+0x2e4/0x854
[  284.753780][   T27]  hung_task_panic+0x0/0x2c
[  284.755004][   T27]  kthread+0x374/0x454
[  284.756089][   T27]  ret_from_fork+0x10/0x20
[  284.757285][   T27] SMP: stopping secondary CPUs
[  284.758590][   T27] Kernel Offset: disabled
[  284.759753][   T27] CPU features: 0x8,000081c1,21302e40
[  284.761194][   T27] Memory Limit: none
[  285.093737][   T27] Rebooting in 86400 seconds..