Warning: Permanently added '10.128.0.182' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 493.918122][ T6943] IPVS: ftp: loaded support on port[0] = 21 [ 493.958977][ T6964] netlink: 8 bytes leftover after parsing attributes in process `syz-executor637'. [ 493.968693][ T6964] netlink: 5212 bytes leftover after parsing attributes in process `syz-executor637'. [ 493.980786][ T6964] netlink: 8 bytes leftover after parsing attributes in process `syz-executor637'. [ 493.990718][ T6964] netlink: 5212 bytes leftover after parsing attributes in process `syz-executor637'. [ 657.210115][ T1127] INFO: task kworker/0:3:3965 blocked for more than 143 seconds. [ 657.217960][ T1127] Not tainted 5.9.0-rc8-syzkaller #0 [ 657.227172][ T1127] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 657.236584][ T1127] task:kworker/0:3 state:D stack:29368 pid: 3965 ppid: 2 flags:0x00004000 [ 657.246770][ T1127] Workqueue: ipv6_addrconf addrconf_verify_work [ 657.254827][ T1127] Call Trace: [ 657.258247][ T1127] __schedule+0xec9/0x2280 [ 657.263757][ T1127] ? io_schedule_timeout+0x140/0x140 [ 657.269157][ T1127] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 657.276304][ T1127] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.282215][ T1127] ? lockdep_hardirqs_on+0x53/0x100 [ 657.287423][ T1127] schedule+0xd0/0x2a0 [ 657.292631][ T1127] schedule_preempt_disabled+0xf/0x20 [ 657.298009][ T1127] __mutex_lock+0x3e2/0x10e0 [ 657.303679][ T1127] ? addrconf_verify_work+0xa/0x20 [ 657.308802][ T1127] ? mutex_lock_io_nested+0xf60/0xf60 [ 657.315274][ T1127] ? lock_release+0x8f0/0x8f0 [ 657.320588][ T1127] ? lock_downgrade+0x830/0x830 [ 657.325449][ T1127] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.331743][ T1127] ? lock_is_held_type+0xbb/0xf0 [ 657.336697][ T1127] addrconf_verify_work+0xa/0x20 [ 657.342840][ T1127] process_one_work+0x94c/0x1670 [ 657.347793][ T1127] ? lock_release+0x8f0/0x8f0 [ 657.353572][ T1127] ? pwq_dec_nr_in_flight+0x320/0x320 [ 657.358955][ T1127] ? rwlock_bug.part.0+0x90/0x90 [ 657.364946][ T1127] ? lockdep_hardirqs_off+0x96/0xd0 [ 657.370825][ T1127] worker_thread+0x64c/0x1120 [ 657.375523][ T1127] ? __kthread_parkme+0x13f/0x1e0 [ 657.382745][ T1127] ? process_one_work+0x1670/0x1670 [ 657.387951][ T1127] kthread+0x3b5/0x4a0 [ 657.393101][ T1127] ? __kthread_bind_mask+0xc0/0xc0 [ 657.398273][ T1127] ret_from_fork+0x1f/0x30 [ 657.403886][ T1127] [ 657.403886][ T1127] Showing all locks held in the system: [ 657.413550][ T1127] 1 lock held by khungtaskd/1127: [ 657.418596][ T1127] #0: ffffffff8a067f40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 657.430080][ T1127] 3 locks held by kworker/0:3/3965: [ 657.435274][ T1127] #0: ffff888214d8d538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 657.447316][ T1127] #1: ffffc900055a7da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 657.458748][ T1127] #2: ffffffff8b150988 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 657.468794][ T1127] 1 lock held by in:imklog/6562: [ 657.474377][ T1127] #0: ffff8880a47ba430 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 657.484472][ T1127] 2 locks held by rs:main Q:Reg/6564: [ 657.489841][ T1127] #0: ffff8880ae535e18 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x287/0x2280 [ 657.499700][ T1127] #1: ffff8880ae520ec8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440 [ 657.512872][ T1127] 1 lock held by syz-executor637/6964: [ 657.518353][ T1127] [ 657.521720][ T1127] ============================================= [ 657.521720][ T1127] [ 657.530784][ T1127] NMI backtrace for cpu 0 [ 657.535140][ T1127] CPU: 0 PID: 1127 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 657.543377][ T1127] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.553420][ T1127] Call Trace: [ 657.556833][ T1127] dump_stack+0x198/0x1fd [ 657.561167][ T1127] nmi_cpu_backtrace.cold+0x70/0xb1 [ 657.566410][ T1127] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 657.572047][ T1127] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 657.578068][ T1127] watchdog+0xd7d/0x1000 [ 657.582318][ T1127] ? reset_hung_task_detector+0x30/0x30 [ 657.587857][ T1127] kthread+0x3b5/0x4a0 [ 657.591924][ T1127] ? __kthread_bind_mask+0xc0/0xc0 [ 657.597036][ T1127] ret_from_fork+0x1f/0x30 [ 657.601629][ T1127] Sending NMI from CPU 0 to CPUs 1: [ 657.608463][ C1] NMI backtrace for cpu 1 [ 657.608470][ C1] CPU: 1 PID: 6964 Comm: syz-executor637 Not tainted 5.9.0-rc8-syzkaller #0 [ 657.608477][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.608481][ C1] RIP: 0010:write_comp_data+0x2f/0x80 [ 657.608493][ C1] Code: 05 46 c4 8b 7e 65 48 8b 34 25 c0 fe 01 00 a9 00 01 ff 00 74 0f f6 c4 01 74 59 8b 86 2c 14 00 00 85 c0 74 4f 8b 86 08 14 00 00 <83> f8 03 75 44 48 8b 86 10 14 00 00 8b b6 0c 14 00 00 4c 8b 00 48 [ 657.608497][ C1] RSP: 0018:ffffc900055f6cd8 EFLAGS: 00000246 [ 657.608506][ C1] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff83d86333 [ 657.608511][ C1] RDX: 0000000000000002 RSI: ffff8880a74e0000 RDI: 0000000000000007 [ 657.608524][ C1] RBP: 0000000020003d00 R08: 0000000000000000 R09: ffff8880a7da0c07 [ 657.608530][ C1] R10: 0000000000000002 R11: 0000000000000000 R12: ffff8880a39fb182 [ 657.608535][ C1] R13: ffff8880a9c2cb40 R14: 0000000000000002 R15: ffff8880a9c2cb00 [ 657.608541][ C1] FS: 000000000191f880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 657.608546][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 657.608551][ C1] CR2: 00007f20a5b2c6c0 CR3: 00000000a748a000 CR4: 00000000001506e0 [ 657.608557][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 657.608562][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 657.608565][ C1] Call Trace: [ 657.608569][ C1] __radix_tree_lookup+0x103/0x290 [ 657.608573][ C1] tcf_idr_check_alloc+0xb0/0x3b0 [ 657.608577][ C1] tcf_police_init+0x347/0x13a0 [ 657.608581][ C1] ? tcf_police_cleanup+0x60/0x60 [ 657.608585][ C1] ? find_held_lock+0x2d/0x110 [ 657.608589][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 657.608593][ C1] tcf_action_init_1+0x1a3/0x990 [ 657.608597][ C1] ? tcf_action_dump_old+0x80/0x80 [ 657.608600][ C1] ? lock_acquire+0x1f3/0xaf0 [ 657.608604][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.608608][ C1] ? find_held_lock+0x2d/0x110 [ 657.608612][ C1] ? fs_reclaim_release+0x90/0xd0 [ 657.608615][ C1] ? mark_lock+0x82/0x1660 [ 657.608619][ C1] tcf_exts_validate+0x138/0x420 [ 657.608623][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 657.608627][ C1] ? kmem_cache_alloc_trace+0x18e/0x300 [ 657.608631][ C1] ? __nla_parse+0x3d/0x4a [ 657.608635][ C1] rsvp_change+0x291/0x2990 [ 657.608639][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.608642][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.608646][ C1] ? find_held_lock+0x2d/0x110 [ 657.608650][ C1] ? tc_new_tfilter+0x1be4/0x2130 [ 657.608654][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 657.608658][ C1] ? lock_downgrade+0x830/0x830 [ 657.608662][ C1] ? blackhole_dequeue+0x10/0x10 [ 657.608666][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.608670][ C1] tc_new_tfilter+0x1398/0x2130 [ 657.608674][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 657.608678][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 657.608682][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.608686][ C1] ? is_bpf_text_address+0xcb/0x160 [ 657.608690][ C1] ? kernel_text_address+0xbd/0xf0 [ 657.608694][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.608698][ C1] ? security_capable+0x8f/0xc0 [ 657.608702][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.608706][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 657.608710][ C1] rtnetlink_rcv_msg+0x80f/0xad0 [ 657.608714][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 657.608718][ C1] ? lock_acquire+0x1f3/0xaf0 [ 657.608722][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 657.608725][ C1] netlink_rcv_skb+0x15a/0x430 [ 657.608729][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 657.608733][ C1] ? netlink_ack+0xa10/0xa10 [ 657.608737][ C1] netlink_unicast+0x533/0x7d0 [ 657.608741][ C1] ? netlink_attachskb+0x810/0x810 [ 657.608745][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 657.608749][ C1] ? __check_object_size+0x171/0x3e4 [ 657.608753][ C1] netlink_sendmsg+0x856/0xd90 [ 657.608757][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 657.608761][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 657.608765][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 657.608768][ C1] sock_sendmsg+0xcf/0x120 [ 657.608772][ C1] ____sys_sendmsg+0x331/0x810 [ 657.608776][ C1] ? kernel_sendmsg+0x50/0x50 [ 657.608780][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 657.608783][ C1] ? sock_alloc_file+0x4f/0x190 [ 657.608787][ C1] ? __lock_acquire+0x164a/0x5780 [ 657.608791][ C1] ___sys_sendmsg+0xf3/0x170 [ 657.608795][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 657.608800][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.608804][ C1] ? fs_reclaim_release+0x90/0xd0 [ 657.608807][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.608811][ C1] ? find_held_lock+0x2d/0x110 [ 657.608815][ C1] ? __might_fault+0x11f/0x1d0 [ 657.608819][ C1] ? lock_downgrade+0x830/0x830 [ 657.608823][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.608827][ C1] __sys_sendmmsg+0x195/0x480 [ 657.608831][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 657.608835][ C1] ? find_held_lock+0x2d/0x110 [ 657.608839][ C1] ? __fd_install+0x1b4/0x600 [ 657.608843][ C1] ? alloc_file_pseudo+0x1/0x250 [ 657.608847][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.608851][ C1] ? __fd_install+0x1e6/0x600 [ 657.608855][ C1] ? __sys_socket+0x16d/0x200 [ 657.608859][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.608863][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 657.608867][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 657.608872][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 657.608876][ C1] do_syscall_64+0x2d/0x70 [ 657.608880][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 657.608884][ C1] RIP: 0033:0x4418c9 [ 657.608896][ C1] Code: e8 5c ad 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 bb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 657.608900][ C1] RSP: 002b:00007ffcc9b90ca8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 657.608910][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004418c9 [ 657.608916][ C1] RDX: 04924924924926d3 RSI: 0000000020000200 RDI: 0000000000000004 [ 657.608922][ C1] RBP: 00007ffcc9b90cb0 R08: 0000000120080522 R09: 0000000120080522 [ 657.608927][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a3ed0 [ 657.608933][ C1] R13: 00000000004027a0 R14: 0000000000000000 R15: 0000000000000000 [ 657.608940][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 657.619923][ T1127] Kernel panic - not syncing: hung_task: blocked tasks [ 658.229601][ T1127] CPU: 0 PID: 1127 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 658.237824][ T1127] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 658.247870][ T1127] Call Trace: [ 658.251164][ T1127] dump_stack+0x198/0x1fd [ 658.255579][ T1127] panic+0x382/0x7fb [ 658.259480][ T1127] ? __warn_printk+0xf3/0xf3 [ 658.264071][ T1127] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 658.269697][ T1127] ? preempt_schedule_thunk+0x16/0x18 [ 658.275065][ T1127] ? watchdog.cold+0x5/0x16b [ 658.279737][ T1127] ? watchdog+0xa82/0x1000 [ 658.284240][ T1127] watchdog.cold+0x16/0x16b [ 658.288744][ T1127] ? reset_hung_task_detector+0x30/0x30 [ 658.294289][ T1127] kthread+0x3b5/0x4a0 [ 658.298358][ T1127] ? __kthread_bind_mask+0xc0/0xc0 [ 658.303471][ T1127] ret_from_fork+0x1f/0x30 [ 658.308787][ T1127] Kernel Offset: disabled [ 658.313105][ T1127] Rebooting in 86400 seconds..