Warning: Permanently added '10.128.0.95' (ED25519) to the list of known hosts. executing program [ 571.398699][ T27] INFO: task kworker/0:2:3271 blocked for more than 143 seconds. [ 571.400851][ T27] Not tainted 5.15.160-syzkaller #0 [ 571.402288][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 571.404612][ T27] task:kworker/0:2 state:D stack: 0 pid: 3271 ppid: 2 flags:0x00000008 [ 571.406988][ T27] Workqueue: ipv6_addrconf addrconf_verify_work [ 571.409997][ T27] Call trace: [ 571.410844][ T27] __switch_to+0x308/0x5e8 [ 571.412002][ T27] __schedule+0xf10/0x1e48 [ 571.413141][ T27] schedule+0x11c/0x1c8 [ 571.414222][ T27] schedule_preempt_disabled+0x18/0x2c [ 571.415615][ T27] __mutex_lock_common+0xba0/0x2154 [ 571.416986][ T27] mutex_lock_nested+0xa4/0xf8 [ 571.418174][ T27] rtnl_lock+0x20/0x2c [ 571.420184][ T27] addrconf_verify_work+0x14/0x28 [ 571.421487][ T27] process_one_work+0x790/0x11b8 [ 571.422801][ T27] worker_thread+0x910/0x1034 [ 571.423988][ T27] kthread+0x37c/0x45c [ 571.424985][ T27] ret_from_fork+0x10/0x20 [ 571.426126][ T27] [ 571.426126][ T27] Showing all locks held in the system: [ 571.428206][ T27] 1 lock held by khungtaskd/27: [ 571.430324][ T27] #0: ffff800014b214a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 [ 571.432879][ T27] 3 locks held by kworker/0:2/3271: [ 571.434244][ T27] #0: ffff0000d2113d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 [ 571.437158][ T27] #1: ffff80001e3d7c00 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 [ 571.440572][ T27] #2: ffff800016a46ca8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c [ 571.442771][ T27] 2 locks held by getty/3751: [ 571.443925][ T27] #0: ffff0000d39e1098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 [ 571.446438][ T27] #1: ffff80001a32e2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1204 [ 571.449770][ T27] 1 lock held by syz-executor145/3996: [ 571.451249][ T27] [ 571.451872][ T27] ============================================= [ 571.451872][ T27] [ 571.454056][ T27] Kernel panic - not syncing: hung_task: blocked tasks [ 571.455843][ T27] CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.160-syzkaller #0 [ 571.457906][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 571.460552][ T27] Call trace: [ 571.461422][ T27] dump_backtrace+0x0/0x530 [ 571.462601][ T27] show_stack+0x2c/0x3c [ 571.463715][ T27] dump_stack_lvl+0x108/0x170 [ 571.464942][ T27] dump_stack+0x1c/0x58 [ 571.466058][ T27] panic+0x304/0x8bc [ 571.467019][ T27] hung_task_panic+0x0/0x2c [ 571.468129][ T27] kthread+0x37c/0x45c [ 571.469286][ T27] ret_from_fork+0x10/0x20 [ 571.470486][ T27] SMP: stopping secondary CPUs [ 571.471742][ T27] Kernel Offset: disabled [ 571.472777][ T27] CPU features: 0x0,000081c1,21302e40 [ 571.474143][ T27] Memory Limit: none [ 571.823035][ T27] Rebooting in 86400 seconds..