Warning: Permanently added '10.128.1.141' (ED25519) to the list of known hosts. executing program [ 624.381303][ T4063] loop0: detected capacity change from 0 to 32768 [ 624.492248][ T4063] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 624.494547][ T4063] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 624.503112][ T4063] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 624.507232][ T7] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 624.509167][ T7] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 624.537327][ T7] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 28ms [ 624.539761][ T7] gfs2: fsid=syz:syz.0: jid=0: Done [ 624.541394][ T4063] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 858.109146][ T27] INFO: task syz-executor236:4062 blocked for more than 143 seconds. [ 858.111387][ T27] Not tainted 5.15.179-syzkaller #0 [ 858.112889][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.115094][ T27] task:syz-executor236 state:D stack: 0 pid: 4062 ppid: 4060 flags:0x0000000c [ 858.117523][ T27] Call trace: [ 858.118373][ T27] __switch_to+0x308/0x588 [ 858.119807][ T27] __schedule+0xf10/0x1e48 [ 858.120998][ T27] schedule+0x11c/0x1c8 [ 858.122031][ T27] schedule_timeout+0x1d8/0x344 [ 858.123267][ T27] gfs2_gl_hash_clear+0x180/0x2f4 [ 858.124561][ T27] gfs2_put_super+0x5e4/0x684 [ 858.125811][ T27] generic_shutdown_super+0x130/0x2f0 [ 858.127290][ T27] kill_block_super+0x70/0xdc [ 858.128493][ T27] gfs2_kill_sb+0xc0/0xd4 [ 858.129731][ T27] deactivate_locked_super+0xb8/0x13c [ 858.131169][ T27] deactivate_super+0x108/0x128 [ 858.132412][ T27] cleanup_mnt+0x3c0/0x474 [ 858.133556][ T27] __cleanup_mnt+0x20/0x30 [ 858.134729][ T27] task_work_run+0x130/0x1e4 [ 858.135952][ T27] do_notify_resume+0x262c/0x32b8 [ 858.137250][ T27] el0_svc+0xfc/0x1f0 [ 858.138257][ T27] el0t_64_sync_handler+0x84/0xe4 [ 858.139677][ T27] el0t_64_sync+0x1a0/0x1a4 [ 858.140852][ T27] [ 858.140852][ T27] Showing all locks held in the system: [ 858.142893][ T27] 1 lock held by khungtaskd/27: [ 858.144141][ T27] #0: ffff800014d41b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 [ 858.146645][ T27] 2 locks held by getty/3792: [ 858.147826][ T27] #0: ffff0000d43b8098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 [ 858.150412][ T27] #1: ffff80001d6ce2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1204 [ 858.153178][ T27] 1 lock held by syz-executor236/4062: [ 858.154677][ T27] #0: ffff0000d790a0e0 (&type->s_umount_key#41){++++}-{3:3}, at: deactivate_super+0x100/0x128 [ 858.157438][ T27] [ 858.158003][ T27] ============================================= [ 858.158003][ T27] [ 858.160355][ T27] Kernel panic - not syncing: hung_task: blocked tasks [ 858.162101][ T27] CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.179-syzkaller #0 [ 858.164209][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 858.166795][ T27] Call trace: [ 858.167638][ T27] dump_backtrace+0x0/0x530 [ 858.168800][ T27] show_stack+0x2c/0x3c [ 858.169942][ T27] dump_stack_lvl+0x108/0x170 [ 858.171192][ T27] dump_stack+0x1c/0x58 [ 858.172312][ T27] panic+0x304/0x8bc [ 858.173390][ T27] hung_task_panic+0x0/0x2c [ 858.174585][ T27] kthread+0x37c/0x45c [ 858.175680][ T27] ret_from_fork+0x10/0x20 [ 858.176900][ T27] SMP: stopping secondary CPUs [ 858.178234][ T27] Kernel Offset: disabled [ 858.179438][ T27] CPU features: 0x8,000081c1,21302e40 [ 858.180863][ T27] Memory Limit: none [ 858.506721][ T27] Rebooting in 86400 seconds..