Warning: Permanently added '10.128.1.51' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 474.072641][ T6846] netlink: 4 bytes leftover after parsing attributes in process `syz-executor939'. [ 474.117834][ T6848] netlink: 4 bytes leftover after parsing attributes in process `syz-executor939'. [ 636.863109][ T1166] INFO: task syz-executor939:6846 blocked for more than 143 seconds. [ 636.871321][ T1166] Not tainted 5.9.0-rc1-syzkaller #0 [ 636.881834][ T1166] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 636.891317][ T1166] task:syz-executor939 state:D stack:25032 pid: 6846 ppid: 6839 flags:0x00004004 [ 636.901442][ T1166] Call Trace: [ 636.905699][ T1166] __schedule+0x8e5/0x21e0 [ 636.910138][ T1166] ? io_schedule_timeout+0x140/0x140 [ 636.916729][ T1166] schedule+0xd0/0x2a0 [ 636.920816][ T1166] schedule_preempt_disabled+0xf/0x20 [ 636.927547][ T1166] __mutex_lock+0x3e2/0x10e0 [ 636.932283][ T1166] ? tcf_ife_init+0x11a4/0x16f0 [ 636.938587][ T1166] ? mutex_lock_io_nested+0xf60/0xf60 [ 636.945066][ T1166] ? lock_downgrade+0x760/0x830 [ 636.949946][ T1166] tcf_ife_init+0x11a4/0x16f0 [ 636.955956][ T1166] ? tcf_ife_dump+0xb90/0xb90 [ 636.960643][ T1166] ? lock_acquire+0x1f1/0xad0 [ 636.966691][ T1166] ? tc_lookup_action_n+0x1a/0xf0 [ 636.972769][ T1166] ? find_held_lock+0x2d/0x110 [ 636.978800][ T1166] ? lock_downgrade+0x830/0x830 [ 636.984676][ T1166] tcf_action_init_1+0x6a5/0xac0 [ 636.989633][ T1166] ? tcf_action_dump_old+0x80/0x80 [ 636.996058][ T1166] tcf_action_init+0x249/0x380 [ 637.000851][ T1166] ? tcf_action_init_1+0xac0/0xac0 [ 637.008172][ T1166] tcf_action_add+0xd9/0x360 [ 637.012785][ T1166] ? tca_action_gd+0xda0/0xda0 [ 637.018834][ T1166] ? lock_acquire+0x1f1/0xad0 [ 637.024467][ T1166] ? bpf_lsm_capable+0x5/0x10 [ 637.029261][ T1166] ? __nla_parse+0x3d/0x4a [ 637.034951][ T1166] tc_ctl_action+0x33a/0x439 [ 637.039554][ T1166] ? tcf_action_add+0x360/0x360 [ 637.045768][ T1166] ? lock_is_held_type+0xbb/0xf0 [ 637.050727][ T1166] ? tcf_action_add+0x360/0x360 [ 637.056977][ T1166] rtnetlink_rcv_msg+0x44e/0xad0 [ 637.061934][ T1166] ? rtnetlink_put_metrics+0x510/0x510 [ 637.069601][ T1166] ? lock_acquire+0x1f1/0xad0 [ 637.075060][ T1166] ? netlink_deliver_tap+0x146/0xb70 [ 637.080361][ T1166] netlink_rcv_skb+0x15a/0x430 [ 637.086463][ T1166] ? rtnetlink_put_metrics+0x510/0x510 [ 637.091939][ T1166] ? netlink_ack+0xa10/0xa10 [ 637.097794][ T1166] ? lock_is_held_type+0xbb/0xf0 [ 637.102751][ T1166] netlink_unicast+0x533/0x7d0 [ 637.108865][ T1166] ? netlink_attachskb+0x810/0x810 [ 637.114795][ T1166] ? _copy_from_iter_full+0x247/0x890 [ 637.120253][ T1166] ? __phys_addr+0x9a/0x110 [ 637.126149][ T1166] ? __phys_addr_symbol+0x2c/0x70 [ 637.131298][ T1166] ? __check_object_size+0x171/0x3e4 [ 637.138999][ T1166] netlink_sendmsg+0x856/0xd90 [ 637.144706][ T1166] ? netlink_unicast+0x7d0/0x7d0 [ 637.149723][ T1166] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 637.156463][ T1166] ? netlink_unicast+0x7d0/0x7d0 [ 637.161518][ T1166] sock_sendmsg+0xcf/0x120 [ 637.167443][ T1166] ____sys_sendmsg+0x6e8/0x810 [ 637.172229][ T1166] ? kernel_sendmsg+0x50/0x50 [ 637.178152][ T1166] ? do_recvmmsg+0x6d0/0x6d0 [ 637.182760][ T1166] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 637.190060][ T1166] ? lock_acquire+0x1f1/0xad0 [ 637.195613][ T1166] ? do_huge_pmd_anonymous_page+0x120d/0x2230 [ 637.201691][ T1166] ? find_held_lock+0x2d/0x110 [ 637.207853][ T1166] ___sys_sendmsg+0xf3/0x170 [ 637.212471][ T1166] ? sendmsg_copy_msghdr+0x160/0x160 [ 637.219215][ T1166] ? __fget_files+0x272/0x400 [ 637.224672][ T1166] ? lock_downgrade+0x830/0x830 [ 637.229538][ T1166] ? do_huge_pmd_anonymous_page+0x8ef/0x2230 [ 637.236753][ T1166] ? __fget_files+0x294/0x400 [ 637.241449][ T1166] ? __fget_light+0xea/0x280 [ 637.247367][ T1166] __sys_sendmsg+0xe5/0x1b0 [ 637.251887][ T1166] ? __sys_sendmsg_sock+0xb0/0xb0 [ 637.258332][ T1166] ? trace_hardirqs_on+0x5f/0x220 [ 637.265101][ T1166] ? lockdep_hardirqs_on+0x76/0xf0 [ 637.270247][ T1166] do_syscall_64+0x2d/0x70 [ 637.275990][ T1166] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 637.281918][ T1166] RIP: 0033:0x445e29 [ 637.288080][ T1166] Code: Bad RIP value. [ 637.292155][ T1166] RSP: 002b:00007f9e83d9ddb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 637.301729][ T1166] RAX: ffffffffffffffda RBX: 00000000006dac28 RCX: 0000000000445e29 [ 637.310571][ T1166] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 637.319332][ T1166] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 637.328114][ T1166] R10: 0000000000000006 R11: 0000000000000246 R12: 00000000006dac2c [ 637.336808][ T1166] R13: 00007fff2893048f R14: 00007f9e83d9e9c0 R15: 20c49ba5e353f7cf [ 637.345666][ T1166] [ 637.345666][ T1166] Showing all locks held in the system: [ 637.354282][ T1166] 3 locks held by kworker/0:2/48: [ 637.359305][ T1166] #0: ffff888214d82538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 637.373111][ T1166] #1: ffffc90000e47da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 637.384248][ T1166] #2: ffffffff8a7e76c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 637.395734][ T1166] 1 lock held by khungtaskd/1166: [ 637.400759][ T1166] #0: ffffffff89bd6900 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 637.411922][ T1166] 1 lock held by in:imklog/6548: [ 637.417659][ T1166] #0: ffff8880a8d05870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 637.427754][ T1166] 1 lock held by syz-executor939/6846: [ 637.434009][ T1166] #0: ffffffff8a7e76c8 (rtnl_mutex){+.+.}-{3:3}, at: tcf_ife_init+0x11a4/0x16f0 [ 637.443978][ T1166] 1 lock held by syz-executor939/6848: [ 637.449465][ T1166] [ 637.451786][ T1166] ============================================= [ 637.451786][ T1166] [ 637.461917][ T1166] NMI backtrace for cpu 0 [ 637.466414][ T1166] CPU: 0 PID: 1166 Comm: khungtaskd Not tainted 5.9.0-rc1-syzkaller #0 [ 637.474667][ T1166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.484717][ T1166] Call Trace: [ 637.488014][ T1166] dump_stack+0x18f/0x20d [ 637.492413][ T1166] nmi_cpu_backtrace.cold+0x70/0xb1 [ 637.497680][ T1166] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 637.503318][ T1166] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 637.509372][ T1166] watchdog+0xd7d/0x1000 [ 637.513619][ T1166] ? reset_hung_task_detector+0x30/0x30 [ 637.519229][ T1166] kthread+0x3b5/0x4a0 [ 637.523300][ T1166] ? __kthread_bind_mask+0xc0/0xc0 [ 637.528408][ T1166] ? __kthread_bind_mask+0xc0/0xc0 [ 637.533591][ T1166] ret_from_fork+0x1f/0x30 [ 637.538187][ T1166] Sending NMI from CPU 0 to CPUs 1: [ 637.544567][ C1] NMI backtrace for cpu 1 [ 637.544574][ C1] CPU: 1 PID: 6848 Comm: syz-executor939 Not tainted 5.9.0-rc1-syzkaller #0 [ 637.544581][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.544585][ C1] RIP: 0010:arch_local_irq_restore+0x2e/0x50 [ 637.544597][ C1] Code: 3b b6 89 53 48 89 fb 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 18 48 83 3d 41 e6 5c 08 00 74 0c 48 89 df 57 9d <0f> 1f 44 00 00 5b c3 0f 0b 48 c7 c7 c8 3b b6 89 e8 bd 01 5b 00 eb [ 637.544601][ C1] RSP: 0018:ffffc9000527ec78 EFLAGS: 00000286 [ 637.544610][ C1] RAX: 1ffffffff136c779 RBX: 0000000000000286 RCX: 0000000000000000 [ 637.544615][ C1] RDX: dffffc0000000000 RSI: ffffffff89bd6840 RDI: 0000000000000286 [ 637.544620][ C1] RBP: ffff888093c08440 R08: ffffffff865a9e38 R09: ffff888099edb807 [ 637.544626][ C1] R10: ffffed10133db700 R11: 0000000000000001 R12: 0000000000000000 [ 637.544631][ C1] R13: ffff888093c08d28 R14: ffff888093c08d28 R15: 0000000000000286 [ 637.544637][ C1] FS: 00007f9e83d7d700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 637.544642][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 637.544647][ C1] CR2: 00007f6aa9c91000 CR3: 0000000091d8f000 CR4: 00000000001506e0 [ 637.544652][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 637.544658][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 637.544660][ C1] Call Trace: [ 637.544664][ C1] lock_is_held_type+0xbb/0xf0 [ 637.544668][ C1] ___might_sleep+0x268/0x2f0 [ 637.544671][ C1] __mutex_lock+0xa9/0x10e0 [ 637.544675][ C1] ? trace_hardirqs_on+0x5f/0x220 [ 637.544679][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 637.544683][ C1] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 637.544687][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 637.544692][ C1] ? __mutex_unlock_slowpath+0xe2/0x610 [ 637.544696][ C1] ? __radix_tree_lookup+0x10e/0x290 [ 637.544699][ C1] ? __radix_tree_lookup+0x149/0x290 [ 637.544703][ C1] ? wait_for_completion+0x260/0x260 [ 637.544707][ C1] tcf_idr_check_alloc+0x78/0x3b0 [ 637.544711][ C1] tcf_ife_init+0x3b1/0x16f0 [ 637.544714][ C1] ? tcf_ife_dump+0xb90/0xb90 [ 637.544718][ C1] ? lock_acquire+0x1f1/0xad0 [ 637.544722][ C1] ? tc_lookup_action_n+0x1a/0xf0 [ 637.544725][ C1] ? find_held_lock+0x2d/0x110 [ 637.544729][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 637.544733][ C1] ? lock_downgrade+0x830/0x830 [ 637.544737][ C1] tcf_action_init_1+0x6a5/0xac0 [ 637.544741][ C1] ? tcf_action_dump_old+0x80/0x80 [ 637.544744][ C1] tcf_action_init+0x249/0x380 [ 637.544748][ C1] ? tcf_action_init_1+0xac0/0xac0 [ 637.544752][ C1] tcf_action_add+0xd9/0x360 [ 637.544755][ C1] ? tca_action_gd+0xda0/0xda0 [ 637.544759][ C1] ? lock_acquire+0x1f1/0xad0 [ 637.544763][ C1] ? bpf_lsm_capable+0x5/0x10 [ 637.544766][ C1] ? __nla_parse+0x3d/0x4a [ 637.544770][ C1] tc_ctl_action+0x33a/0x439 [ 637.544774][ C1] ? tcf_action_add+0x360/0x360 [ 637.544777][ C1] ? lock_is_held_type+0xbb/0xf0 [ 637.544781][ C1] ? tcf_action_add+0x360/0x360 [ 637.544785][ C1] rtnetlink_rcv_msg+0x44e/0xad0 [ 637.544789][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 637.544793][ C1] ? lock_acquire+0x1f1/0xad0 [ 637.544797][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 637.544800][ C1] netlink_rcv_skb+0x15a/0x430 [ 637.544804][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 637.544808][ C1] ? netlink_ack+0xa10/0xa10 [ 637.544812][ C1] ? lock_is_held_type+0xbb/0xf0 [ 637.544815][ C1] netlink_unicast+0x533/0x7d0 [ 637.544819][ C1] ? netlink_attachskb+0x810/0x810 [ 637.544823][ C1] ? _copy_from_iter_full+0x247/0x890 [ 637.544827][ C1] ? __phys_addr+0x9a/0x110 [ 637.544831][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 637.544834][ C1] ? __check_object_size+0x171/0x3e4 [ 637.544838][ C1] netlink_sendmsg+0x856/0xd90 [ 637.544842][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 637.544846][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 637.544850][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 637.544853][ C1] sock_sendmsg+0xcf/0x120 [ 637.544857][ C1] ____sys_sendmsg+0x6e8/0x810 [ 637.544860][ C1] ? kernel_sendmsg+0x50/0x50 [ 637.544864][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 637.544868][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 637.544872][ C1] ? __lock_acquire+0xbb5/0x5640 [ 637.544875][ C1] ___sys_sendmsg+0xf3/0x170 [ 637.544879][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 637.544883][ C1] ? __fget_files+0x272/0x400 [ 637.544887][ C1] ? lock_downgrade+0x830/0x830 [ 637.544891][ C1] ? percpu_counter_add_batch+0x126/0x180 [ 637.544894][ C1] ? __fget_files+0x294/0x400 [ 637.544898][ C1] ? __fget_light+0xea/0x280 [ 637.544901][ C1] __sys_sendmsg+0xe5/0x1b0 [ 637.544905][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 637.544909][ C1] ? __x64_sys_futex+0x382/0x4e0 [ 637.544913][ C1] ? trace_hardirqs_on+0x5f/0x220 [ 637.544917][ C1] ? lockdep_hardirqs_on+0x76/0xf0 [ 637.544920][ C1] do_syscall_64+0x2d/0x70 [ 637.544924][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 637.544928][ C1] RIP: 0033:0x445e29 [ 637.544939][ C1] Code: e8 bc b7 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 ab 11 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 637.544943][ C1] RSP: 002b:00007f9e83d7cdb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 637.544953][ C1] RAX: ffffffffffffffda RBX: 00000000006dac38 RCX: 0000000000445e29 [ 637.544958][ C1] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000004 [ 637.544963][ C1] RBP: 00000000006dac30 R08: 0000000000000003 R09: 0000000000000000 [ 637.544969][ C1] R10: 0000000000000003 R11: 0000000000000246 R12: 00000000006dac3c [ 637.544974][ C1] R13: 00007fff2893048f R14: 00007f9e83d7d9c0 R15: 20c49ba5e353f7cf [ 637.544981][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 637.550666][ T1166] Kernel panic - not syncing: hung_task: blocked tasks [ 638.116384][ T1166] CPU: 0 PID: 1166 Comm: khungtaskd Not tainted 5.9.0-rc1-syzkaller #0 [ 638.124618][ T1166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 638.134694][ T1166] Call Trace: [ 638.138011][ T1166] dump_stack+0x18f/0x20d [ 638.142458][ T1166] panic+0x2e3/0x75c [ 638.146385][ T1166] ? __warn_printk+0xf3/0xf3 [ 638.150990][ T1166] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 638.156640][ T1166] ? preempt_schedule_thunk+0x16/0x18 [ 638.162016][ T1166] ? watchdog.cold+0x5/0x16b [ 638.166612][ T1166] ? watchdog+0xa82/0x1000 [ 638.171032][ T1166] watchdog.cold+0x16/0x16b [ 638.175540][ T1166] ? reset_hung_task_detector+0x30/0x30 [ 638.181165][ T1166] kthread+0x3b5/0x4a0 [ 638.185231][ T1166] ? __kthread_bind_mask+0xc0/0xc0 [ 638.190338][ T1166] ? __kthread_bind_mask+0xc0/0xc0 [ 638.195450][ T1166] ret_from_fork+0x1f/0x30 [ 638.200831][ T1166] Kernel Offset: disabled [ 638.205154][ T1166] Rebooting in 86400 seconds..