[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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 Warning: Permanently added '10.128.0.119' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 65.037454][ T6854] IPVS: ftp: loaded support on port[0] = 21 executing program [ 65.079975][ T6876] IPv6: ADDRCONF(NETDEV_CHANGE): gtp0: link becomes ready [ 65.091789][ T6876] device vlan0 entered promiscuous mode [ 65.153907][ T6884] IPv6: ADDRCONF(NETDEV_CHANGE): gtp1: link becomes ready [ 65.165907][ T6884] device vlan0 entered promiscuous mode executing program [ 65.242109][ T6892] IPv6: ADDRCONF(NETDEV_CHANGE): gtp2: link becomes ready [ 65.253580][ T6892] device vlan0 entered promiscuous mode executing program executing program [ 65.330842][ T6900] IPv6: ADDRCONF(NETDEV_CHANGE): gtp3: link becomes ready [ 65.341951][ T6900] device vlan0 entered promiscuous mode executing program [ 65.390228][ T6908] IPv6: ADDRCONF(NETDEV_CHANGE): gtp4: link becomes ready [ 65.401066][ T6908] device vlan0 entered promiscuous mode executing program executing program executing program [ 65.460574][ T6916] IPv6: ADDRCONF(NETDEV_CHANGE): gtp5: link becomes ready [ 65.476182][ T6920] IPv6: ADDRCONF(NETDEV_CHANGE): gtp6: link becomes ready [ 65.492472][ T6924] IPv6: ADDRCONF(NETDEV_CHANGE): gtp7: link becomes ready executing program executing program [ 65.508708][ T6928] IPv6: ADDRCONF(NETDEV_CHANGE): gtp8: link becomes ready [ 65.525998][ T6932] IPv6: ADDRCONF(NETDEV_CHANGE): gtp9: link becomes ready [ 65.540946][ T6936] IPv6: ADDRCONF(NETDEV_CHANGE): gtp10: link becomes ready [ 65.552270][ T6936] device gtp6 entered promiscuous mode [ 65.558637][ T6936] device vlan0 entered promiscuous mode [ 65.564461][ C0] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN [ 65.564470][ C0] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 65.564483][ C0] CPU: 0 PID: 6936 Comm: syz-executor415 Not tainted 5.9.0-rc3-syzkaller #0 [ 65.564490][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.564509][ C0] RIP: 0010:skb_release_data+0x232/0x910 [ 65.564521][ C0] Code: 48 c1 e8 03 42 80 3c 30 00 0f 85 ea 05 00 00 48 8b 0c 24 49 63 c4 48 c1 e0 04 48 8b 6c 08 30 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 ba 05 00 00 48 8b 5d 08 31 ff 49 89 dd 41 83 [ 65.564528][ C0] RSP: 0018:ffffc90000007a48 EFLAGS: 00010202 [ 65.564549][ C0] RAX: 0000000000000001 RBX: 0000000000000002 RCX: ffff88809dd164c0 [ 65.564558][ C0] RDX: ffff8880898da380 RSI: ffffffff863843a5 RDI: 0000000000000008 [ 65.564565][ C0] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ab2c74f [ 65.564572][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 65.564579][ C0] R13: ffff88809dd164c0 R14: dffffc0000000000 R15: ffff88809dd164f0 [ 65.564590][ C0] FS: 00007ff5ac891700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 65.564598][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.564606][ C0] CR2: 00007fcc1cbb4000 CR3: 0000000093537000 CR4: 00000000001506f0 [ 65.564618][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.564626][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.564629][ C0] Call Trace: [ 65.564634][ C0] [ 65.564651][ C0] ? lock_acquire+0x1f3/0xae0 [ 65.564665][ C0] ? kfree_skb+0x7d/0x100 [ 65.564677][ C0] kfree_skb.part.0+0xc2/0x350 [ 65.564691][ C0] kfree_skb+0x7d/0x100 [ 65.564703][ C0] validate_xmit_skb+0x9d9/0xf00 [ 65.564718][ C0] ? lock_is_held_type+0xbb/0xf0 [ 65.564732][ C0] __dev_queue_xmit+0x990/0x2d60 [ 65.564747][ C0] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 65.564762][ C0] ? mark_held_locks+0x9f/0xe0 [ 65.564776][ C0] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 65.564789][ C0] ? lockdep_hardirqs_on_prepare+0x19c/0x530 [ 65.564802][ C0] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 65.564814][ C0] ? lockdep_hardirqs_on+0x53/0x100 [ 65.564825][ C0] ? _raw_spin_unlock_irqrestore+0x5c/0x90 [ 65.564839][ C0] mrp_join_timer+0x8a/0xc0 [ 65.564865][ C0] call_timer_fn+0x1ac/0x760 [ 65.564877][ C0] ? mrp_attr_event+0x220/0x220 [ 65.564900][ C0] ? msleep_interruptible+0x130/0x130 [ 65.564916][ C0] ? _raw_spin_unlock_irq+0x1f/0x80 [ 65.564928][ C0] ? lockdep_hardirqs_on_prepare+0x19c/0x530 [ 65.564940][ C0] ? _raw_spin_unlock_irq+0x1f/0x80 [ 65.564952][ C0] ? mrp_attr_event+0x220/0x220 [ 65.564965][ C0] __run_timers.part.0+0x67c/0xaa0 [ 65.564981][ C0] ? call_timer_fn+0x760/0x760 [ 65.564993][ C0] ? clockevents_program_event+0x12b/0x350 [ 65.565007][ C0] ? mark_held_locks+0x9f/0xe0 [ 65.565019][ C0] ? sched_clock_cpu+0x18/0x1b0 [ 65.565034][ C0] run_timer_softirq+0xae/0x1a0 [ 65.565048][ C0] __do_softirq+0x1f7/0xa91 [ 65.565065][ C0] asm_call_on_stack+0xf/0x20 [ 65.565070][ C0] [ 65.565084][ C0] do_softirq_own_stack+0x9d/0xd0 [ 65.565097][ C0] irq_exit_rcu+0x235/0x280 [ 65.565109][ C0] sysvec_apic_timer_interrupt+0x51/0xf0 [ 65.565123][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 65.565137][ C0] RIP: 0010:console_unlock+0xb4a/0xe60 [ 65.565148][ C0] Code: 89 48 c1 e8 03 42 80 3c 38 00 0f 85 18 03 00 00 48 83 3d f0 f4 58 08 00 0f 84 90 01 00 00 e8 ad 2c 17 00 48 8b 7c 24 30 57 9d <0f> 1f 44 00 00 8b 5c 24 64 31 ff 89 de e8 14 29 17 00 85 db 0f 84 [ 65.565154][ C0] RSP: 0018:ffffc90005576ed0 EFLAGS: 00000293 [ 65.565163][ C0] RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000006 [ 65.565170][ C0] RDX: ffff8880898da380 RSI: ffffffff815d47a3 RDI: 0000000000000293 [ 65.565177][ C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8c5ff9e7 [ 65.565184][ C0] R10: fffffbfff18bff3c R11: 0000000033393654 R12: ffffffff84c32210 [ 65.565192][ C0] R13: 000000000000003d R14: ffffffff8a3cd410 R15: dffffc0000000000 [ 65.565206][ C0] ? netconsole_netdev_event+0x2b0/0x2b0 [ 65.565219][ C0] ? console_unlock+0xb43/0xe60 [ 65.565238][ C0] vprintk_emit+0x2ff/0x740 [ 65.565251][ C0] vprintk_func+0x8f/0x1a6 [ 65.565271][ C0] printk+0xba/0xed [ 65.565282][ C0] ? log_store.cold+0x16/0x16 [ 65.565296][ C0] ? __dev_open+0x1c6/0x470 [ 65.565309][ C0] ? __dev_set_promiscuity.cold+0x30e/0x35f [ 65.565323][ C0] __dev_set_promiscuity.cold+0x55/0x35f [ 65.565337][ C0] __dev_change_flags+0x3af/0x660 [ 65.565350][ C0] ? dev_set_allmulti+0x30/0x30 [ 65.565365][ C0] rtnl_configure_link+0xee/0x230 [ 65.565378][ C0] __rtnl_newlink+0x10b6/0x1740 [ 65.565394][ C0] ? lock_downgrade+0x830/0x830 [ 65.565406][ C0] ? rtnl_setlink+0x3b0/0x3b0 [ 65.565417][ C0] ? unwind_next_frame+0xe3b/0x1f90 [ 65.565430][ C0] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.565448][ C0] ? is_bpf_text_address+0xcb/0x160 [ 65.565460][ C0] ? kernel_text_address+0xbd/0xf0 [ 65.565471][ C0] ? __kernel_text_address+0x9/0x30 [ 65.565485][ C0] ? unwind_get_return_address+0x51/0x90 [ 65.565496][ C0] ? profile_setup.cold+0xc1/0xc1 [ 65.565508][ C0] ? arch_stack_walk+0x97/0xf0 [ 65.565523][ C0] ? stack_trace_save+0x8c/0xc0 [ 65.565535][ C0] ? stack_trace_consume_entry+0x160/0x160 [ 65.565567][ C0] ? lock_is_held_type+0xbb/0xf0 [ 65.565585][ C0] ? kmem_cache_alloc_trace+0x18e/0x2c0 [ 65.565600][ C0] rtnl_newlink+0x64/0xa0 [ 65.565621][ C0] ? __rtnl_newlink+0x1740/0x1740 [ 65.565633][ C0] rtnetlink_rcv_msg+0x44e/0xad0 [ 65.565646][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 65.565661][ C0] ? lock_acquire+0x1f3/0xae0 [ 65.565675][ C0] ? netlink_deliver_tap+0x146/0xb70 [ 65.565691][ C0] netlink_rcv_skb+0x15a/0x430 [ 65.565704][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 65.565717][ C0] ? netlink_ack+0xa10/0xa10 [ 65.565733][ C0] ? __kmalloc_node_track_caller+0x38/0x60 [ 65.565748][ C0] netlink_unicast+0x533/0x7d0 [ 65.565764][ C0] ? netlink_attachskb+0x810/0x810 [ 65.565777][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 65.565789][ C0] ? __check_object_size+0x171/0x3e4 [ 65.565804][ C0] netlink_sendmsg+0x856/0xd90 [ 65.565820][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 65.565834][ C0] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 65.565848][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 65.565869][ C0] sock_sendmsg+0xcf/0x120 [ 65.565881][ C0] ____sys_sendmsg+0x6e8/0x810 [ 65.565895][ C0] ? kernel_sendmsg+0x50/0x50 [ 65.565907][ C0] ? do_recvmmsg+0x6d0/0x6d0 [ 65.565923][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 65.565946][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 65.565961][ C0] ___sys_sendmsg+0xf3/0x170 [ 65.565974][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 65.565988][ C0] ? __fget_files+0x272/0x400 [ 65.566002][ C0] ? lock_downgrade+0x830/0x830 [ 65.566020][ C0] ? __fget_files+0x294/0x400 [ 65.566036][ C0] ? __fget_light+0xea/0x280 [ 65.566051][ C0] __sys_sendmsg+0xe5/0x1b0 [ 65.566063][ C0] ? __sys_sendmsg_sock+0xb0/0xb0 [ 65.566076][ C0] ? __x64_sys_futex+0x382/0x4e0 [ 65.566093][ C0] ? syscall_enter_from_user_mode+0x20/0x290 [ 65.566105][ C0] ? lockdep_hardirqs_on+0x53/0x100 [ 65.566117][ C0] do_syscall_64+0x2d/0x70 [ 65.566130][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.566140][ C0] RIP: 0033:0x446ec9 [ 65.566153][ C0] Code: e8 bc b4 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 2b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 65.566160][ C0] RSP: 002b:00007ff5ac890db8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 65.566172][ C0] RAX: ffffffffffffffda RBX: 00000000006dbc68 RCX: 0000000000446ec9 [ 65.566180][ C0] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000005 [ 65.566187][ C0] RBP: 00000000006dbc60 R08: 0000000000000005 R09: 0000000000000000 [ 65.566194][ C0] R10: 0000000000000008 R11: 0000000000000246 R12: 00000000006dbc6c [ 65.566202][ C0] R13: 00007fff32db765f R14: 00007ff5ac8919c0 R15: 0000000000000064 [ 65.566211][ C0] Modules linked in: [ 65.566229][ C0] ---[ end trace a3ffb6526c902da6 ]--- [ 65.566254][ C0] RIP: 0010:skb_release_data+0x232/0x910 [ 65.566266][ C0] Code: 48 c1 e8 03 42 80 3c 30 00 0f 85 ea 05 00 00 48 8b 0c 24 49 63 c4 48 c1 e0 04 48 8b 6c 08 30 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 ba 05 00 00 48 8b 5d 08 31 ff 49 89 dd 41 83 [ 65.566272][ C0] RSP: 0018:ffffc90000007a48 EFLAGS: 00010202 [ 65.566282][ C0] RAX: 0000000000000001 RBX: 0000000000000002 RCX: ffff88809dd164c0 [ 65.566290][ C0] RDX: ffff8880898da380 RSI: ffffffff863843a5 RDI: 0000000000000008 [ 65.566297][ C0] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ab2c74f [ 65.566305][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 65.566313][ C0] R13: ffff88809dd164c0 R14: dffffc0000000000 R15: ffff88809dd164f0 [ 65.566324][ C0] FS: 00007ff5ac891700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 65.566333][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.566340][ C0] CR2: 00007fcc1cbb4000 CR3: 0000000093537000 CR4: 00000000001506f0 [ 65.566353][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.566360][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.566367][ C0] Kernel panic - not syncing: Fatal exception in interrupt [ 65.567411][ C0] Kernel Offset: disabled [ 66.491505][ C0] Rebooting in 86400 seconds..