[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 70.173582][ T6545] cron (6545) used greatest stack depth: 22616 bytes left Warning: Permanently added '10.128.1.252' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 859.462460][ T27] INFO: task syz-executor287:16264 can't die for more than 143 seconds. [ 859.470943][ T27] task:syz-executor287 state:D stack:26632 pid:16264 ppid: 6555 flags:0x00004004 [ 859.480278][ T27] Call Trace: [ 859.483648][ T27] [ 859.486586][ T27] __schedule+0xa9a/0x4940 [ 859.491065][ T27] ? lockdep_hardirqs_on+0x79/0x100 [ 859.496392][ T27] ? _raw_spin_unlock_irqrestore+0x3d/0x70 [ 859.502376][ T27] ? io_schedule_timeout+0x140/0x140 [ 859.507672][ T27] ? lock_chain_count+0x20/0x20 [ 859.512634][ T27] ? debug_object_destroy+0x210/0x210 [ 859.518072][ T27] schedule+0xd2/0x260 [ 859.522247][ T27] schedule_timeout+0x14a/0x2a0 [ 859.527125][ T27] ? usleep_range+0x170/0x170 [ 859.531792][ T27] ? dev_deactivate_many+0x701/0xc60 [ 859.537186][ T27] ? destroy_timer_on_stack+0x20/0x20 [ 859.542745][ T27] ? __local_bh_enable_ip+0xa0/0x120 [ 859.548069][ T27] ? lockdep_hardirqs_on+0x79/0x100 [ 859.553336][ T27] dev_deactivate_many+0x710/0xc60 [ 859.558464][ T27] dev_deactivate+0xe9/0x1b0 [ 859.563135][ T27] ? dev_deactivate_many+0xc60/0xc60 [ 859.568426][ T27] ? tcf_block_get_ext+0x17e0/0x17e0 [ 859.573814][ T27] ? blackhole_dequeue+0x10/0x10 [ 859.578763][ T27] qdisc_graft+0xdac/0x1260 [ 859.583362][ T27] ? qdisc_create.constprop.0+0x63b/0x10f0 [ 859.589180][ T27] ? tc_dump_tclass+0x480/0x480 [ 859.594226][ T27] ? tc_get_qdisc+0xb50/0xb50 [ 859.598934][ T27] ? __nla_parse+0x3d/0x50 [ 859.603506][ T27] tc_modify_qdisc+0xb92/0x1980 [ 859.608393][ T27] ? qdisc_create.constprop.0+0x10f0/0x10f0 [ 859.614391][ T27] ? qdisc_create.constprop.0+0x10f0/0x10f0 [ 859.620311][ T27] rtnetlink_rcv_msg+0x413/0xb80 [ 859.625420][ T27] ? rtnl_newlink+0xa0/0xa0 [ 859.629936][ T27] netlink_rcv_skb+0x153/0x420 [ 859.634816][ T27] ? rtnl_newlink+0xa0/0xa0 [ 859.639327][ T27] ? netlink_ack+0xa60/0xa60 [ 859.644002][ T27] ? netlink_deliver_tap+0x1a2/0xc30 [ 859.649299][ T27] ? netlink_deliver_tap+0x1b1/0xc30 [ 859.654651][ T27] ? _copy_from_iter+0x12b/0x1320 [ 859.659687][ T27] netlink_unicast+0x533/0x7d0 [ 859.664529][ T27] ? netlink_attachskb+0x880/0x880 [ 859.669645][ T27] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 859.676065][ T27] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 859.682401][ T27] ? __phys_addr_symbol+0x2c/0x70 [ 859.687458][ T27] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 859.693231][ T27] ? __check_object_size+0x16e/0x3f0 [ 859.698626][ T27] netlink_sendmsg+0x86d/0xda0 [ 859.703524][ T27] ? netlink_unicast+0x7d0/0x7d0 [ 859.708468][ T27] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 859.714772][ T27] ? netlink_unicast+0x7d0/0x7d0 [ 859.719714][ T27] sock_sendmsg+0xcf/0x120 [ 859.724316][ T27] ____sys_sendmsg+0x6e8/0x810 [ 859.729101][ T27] ? kernel_sendmsg+0x50/0x50 [ 859.733849][ T27] ? do_recvmmsg+0x6d0/0x6d0 [ 859.738447][ T27] ? lock_chain_count+0x20/0x20 [ 859.743385][ T27] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 859.749382][ T27] ___sys_sendmsg+0xf3/0x170 [ 859.754030][ T27] ? sendmsg_copy_msghdr+0x160/0x160 [ 859.759376][ T27] ? __lock_acquire+0x162f/0x54a0 [ 859.764491][ T27] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 859.770480][ T27] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 859.776525][ T27] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 859.782845][ T27] ? __fget_light+0x215/0x280 [ 859.787579][ T27] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 859.793874][ T27] __sys_sendmsg+0xe5/0x1b0 [ 859.798385][ T27] ? __sys_sendmsg_sock+0x30/0x30 [ 859.803562][ T27] ? syscall_enter_from_user_mode+0x21/0x70 [ 859.809471][ T27] do_syscall_64+0x35/0xb0 [ 859.813948][ T27] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 859.819846][ T27] RIP: 0033:0x7fde84903f49 [ 859.824348][ T27] RSP: 002b:00007fff536d0b78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 859.832832][ T27] RAX: ffffffffffffffda RBX: 0000000000098579 RCX: 00007fde84903f49 [ 859.840804][ T27] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 859.848857][ T27] RBP: 0000000000000000 R08: 00007fff536d0d18 R09: 00007fff536d0d18 [ 859.856925][ T27] R10: 00007fff536d0d18 R11: 0000000000000246 R12: 00007fff536d0b8c [ 859.864992][ T27] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 859.873036][ T27] [ 859.876272][ T27] [ 859.876272][ T27] Showing all locks held in the system: [ 859.884091][ T27] 3 locks held by kworker/1:0/20: [ 859.889096][ T27] #0: ffff888021dcf938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 [ 859.900194][ T27] #1: ffffc90000da7db0 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 [ 859.910564][ T27] #2: ffffffff8d2fcb68 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 859.920125][ T27] 1 lock held by khungtaskd/27: [ 859.925027][ T27] #0: ffffffff8bb835a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 859.935022][ T27] 1 lock held by syz-executor287/16264: [ 859.940560][ T27] #0: ffffffff8d2fcb68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3be/0xb80 [ 859.950031][ T27] [ 859.952414][ T27] ============================================= [ 859.952414][ T27] [ 859.960817][ T27] Kernel panic - not syncing: hung_task: blocked tasks [ 859.967638][ T27] CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc6-next-20211020-syzkaller #0 [ 859.976991][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 859.987029][ T27] Call Trace: [ 859.990291][ T27] [ 859.993203][ T27] dump_stack_lvl+0xcd/0x134 [ 859.997841][ T27] panic+0x2b0/0x6dd [ 860.001741][ T27] ? __warn_printk+0xf3/0xf3 [ 860.006322][ T27] ? watchdog.cold+0x1b9/0x1de [ 860.011089][ T27] watchdog.cold+0x1ca/0x1de [ 860.015679][ T27] ? trace_sched_process_hang+0x280/0x280 [ 860.021385][ T27] kthread+0x405/0x4f0 [ 860.025480][ T27] ? set_kthread_struct+0x130/0x130 [ 860.030662][ T27] ret_from_fork+0x1f/0x30 [ 860.035084][ T27] [ 860.038248][ T27] Kernel Offset: disabled [ 860.042564][ T27] Rebooting in 86400 seconds..