Warning: Permanently added '10.128.1.175' (ED25519) to the list of known hosts. executing program [ 656.519172][ T4015] loop0: detected capacity change from 0 to 32768 [ 656.623143][ T4015] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 656.625362][ T4015] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 656.634523][ T4015] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 656.638785][ T7] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 656.641166][ T7] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 656.671721][ T7] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 30ms [ 656.674181][ T7] gfs2: fsid=syz:syz.0: jid=0: Done [ 656.675772][ T4015] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 858.130539][ T27] INFO: task syz-executor146:4014 blocked for more than 143 seconds. [ 858.132792][ T27] Not tainted 5.15.160-syzkaller #0 [ 858.134267][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.136516][ T27] task:syz-executor146 state:D stack: 0 pid: 4014 ppid: 4012 flags:0x00000004 [ 858.138882][ T27] Call trace: [ 858.139733][ T27] __switch_to+0x308/0x5e8 [ 858.141053][ T27] __schedule+0xf10/0x1e48 [ 858.142241][ T27] schedule+0x11c/0x1c8 [ 858.143333][ T27] schedule_timeout+0x1d8/0x344 [ 858.144586][ T27] gfs2_gl_hash_clear+0x180/0x2f4 [ 858.145895][ T27] gfs2_put_super+0x5e4/0x684 [ 858.147105][ T27] generic_shutdown_super+0x130/0x29c [ 858.148499][ T27] kill_block_super+0x70/0xdc [ 858.149662][ T27] gfs2_kill_sb+0xc0/0xd4 [ 858.150890][ T27] deactivate_locked_super+0xb8/0x13c [ 858.152274][ T27] deactivate_super+0x108/0x128 [ 858.153503][ T27] cleanup_mnt+0x3c0/0x474 [ 858.154636][ T27] __cleanup_mnt+0x20/0x30 [ 858.155763][ T27] task_work_run+0x130/0x1e4 [ 858.156926][ T27] do_notify_resume+0x262c/0x32b8 [ 858.158241][ T27] el0_svc+0xfc/0x1f0 [ 858.159270][ T27] el0t_64_sync_handler+0x84/0xe4 [ 858.160591][ T27] el0t_64_sync+0x1a0/0x1a4 [ 858.161747][ T27] [ 858.161747][ T27] Showing all locks held in the system: [ 858.163755][ T27] 1 lock held by khungtaskd/27: [ 858.165004][ T27] #0: ffff800014b214a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 [ 858.167492][ T27] 2 locks held by getty/3727: [ 858.168692][ T27] #0: ffff0000d305d098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 [ 858.171278][ T27] #1: ffff800018e232e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1204 [ 858.173949][ T27] 1 lock held by syz-executor146/4014: [ 858.175342][ T27] #0: ffff0000cba760e0 (&type->s_umount_key#41){++++}-{3:3}, at: deactivate_super+0x100/0x128 [ 858.178128][ T27] [ 858.178705][ T27] ============================================= [ 858.178705][ T27] [ 858.180997][ T27] Kernel panic - not syncing: hung_task: blocked tasks [ 858.182788][ T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.160-syzkaller #0 [ 858.184809][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 858.187479][ T27] Call trace: [ 858.188317][ T27] dump_backtrace+0x0/0x530 [ 858.189502][ T27] show_stack+0x2c/0x3c [ 858.190564][ T27] dump_stack_lvl+0x108/0x170 [ 858.191830][ T27] dump_stack+0x1c/0x58 [ 858.192928][ T27] panic+0x304/0x8bc [ 858.193907][ T27] hung_task_panic+0x0/0x2c [ 858.195057][ T27] kthread+0x37c/0x45c [ 858.196136][ T27] ret_from_fork+0x10/0x20 [ 858.197343][ T27] SMP: stopping secondary CPUs [ 858.198658][ T27] Kernel Offset: disabled [ 858.199776][ T27] CPU features: 0x0,000081c1,21302e40 [ 858.201237][ T27] Memory Limit: none [ 858.561780][ T27] Rebooting in 86400 seconds..