[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 85.338549][ T31] audit: type=1800 audit(1575354479.395:25): pid=12594 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 85.361940][ T31] audit: type=1800 audit(1575354479.415:26): pid=12594 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 85.397671][ T31] audit: type=1800 audit(1575354479.445:27): pid=12594 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.221' (ECDSA) to the list of known hosts. syzkaller login: [ 98.386235][T12745] IPVS: ftp: loaded support on port[0] = 21 [ 98.463241][T12745] chnl_net:caif_netlink_parms(): no params data found [ 98.495749][T12745] bridge0: port 1(bridge_slave_0) entered blocking state [ 98.503099][T12745] bridge0: port 1(bridge_slave_0) entered disabled state [ 98.511072][T12745] device bridge_slave_0 entered promiscuous mode [ 98.519528][T12745] bridge0: port 2(bridge_slave_1) entered blocking state [ 98.526765][T12745] bridge0: port 2(bridge_slave_1) entered disabled state [ 98.535289][T12745] device bridge_slave_1 entered promiscuous mode [ 98.557199][T12745] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 98.568800][T12745] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 98.591027][T12745] team0: Port device team_slave_0 added [ 98.598715][T12745] team0: Port device team_slave_1 added [ 98.654629][T12745] device hsr_slave_0 entered promiscuous mode [ 98.702345][T12745] device hsr_slave_1 entered promiscuous mode [ 98.821076][T12745] bridge0: port 2(bridge_slave_1) entered blocking state [ 98.828385][T12745] bridge0: port 2(bridge_slave_1) entered forwarding state [ 98.836281][T12745] bridge0: port 1(bridge_slave_0) entered blocking state [ 98.843502][T12745] bridge0: port 1(bridge_slave_0) entered forwarding state [ 99.029232][T12745] 8021q: adding VLAN 0 to HW filter on device bond0 [ 99.064132][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 99.084169][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 99.103070][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 99.124171][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 99.150980][T12745] 8021q: adding VLAN 0 to HW filter on device team0 [ 99.189211][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 99.199768][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 99.207019][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 99.285076][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 99.294272][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 99.301430][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 99.312300][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 99.322271][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 99.331430][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 99.367138][T12745] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 99.379841][T12745] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 99.464265][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 99.473497][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 99.500237][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 99.507875][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 99.528469][T12745] 8021q: adding VLAN 0 to HW filter on device batadv0 executing program [ 99.767547][T12745] ===================================================== [ 99.774552][T12745] BUG: KMSAN: uninit-value in ip_tunnel_xmit+0x3c6/0x3320 [ 99.781668][T12745] CPU: 1 PID: 12745 Comm: syz-executor929 Not tainted 5.4.0-rc8-syzkaller #0 [ 99.790427][T12745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.800495][T12745] Call Trace: [ 99.803806][T12745] dump_stack+0x1c9/0x220 [ 99.808151][T12745] kmsan_report+0x128/0x220 [ 99.812671][T12745] __msan_warning+0x64/0xc0 [ 99.817185][T12745] ip_tunnel_xmit+0x3c6/0x3320 [ 99.821963][T12745] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 99.828061][T12745] ? skb_push+0x15b/0x250 [ 99.832398][T12745] ? gre_build_header+0x3ec/0x9f0 [ 99.837425][T12745] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 99.843309][T12745] ipgre_xmit+0xff3/0x1120 [ 99.847712][T12745] ? ipgre_close+0x240/0x240 [ 99.852294][T12745] dev_hard_start_xmit+0x51a/0xab0 [ 99.857407][T12745] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 99.863286][T12745] __dev_queue_xmit+0x35b6/0x4200 [ 99.868307][T12745] dev_queue_xmit+0x4b/0x60 [ 99.872803][T12745] ? netdev_core_pick_tx+0x4d0/0x4d0 [ 99.878068][T12745] packet_sendmsg+0x8234/0x9100 [ 99.882907][T12745] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 99.888956][T12745] ? aa_label_sk_perm+0x6d6/0x940 [ 99.893969][T12745] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 99.900098][T12745] ? kmsan_get_metadata+0x4f/0x290 [ 99.905191][T12745] ? kmsan_internal_set_origin+0x6a/0xb0 [ 99.910803][T12745] ? metadata_is_contiguous+0x270/0x270 [ 99.916332][T12745] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 99.922381][T12745] ? aa_sk_perm+0x730/0xaf0 [ 99.926882][T12745] ? compat_packet_setsockopt+0x360/0x360 [ 99.932593][T12745] ___sys_sendmsg+0x14ff/0x1590 [ 99.937437][T12745] ? kmsan_get_metadata+0x35/0x290 [ 99.942552][T12745] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 99.948425][T12745] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 99.954473][T12745] ? __fget_light+0x1b8/0x710 [ 99.959137][T12745] __se_sys_sendmsg+0x305/0x460 [ 99.963977][T12745] __x64_sys_sendmsg+0x4a/0x70 [ 99.968726][T12745] do_syscall_64+0xb6/0x160 [ 99.973213][T12745] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 99.979080][T12745] RIP: 0033:0x441fb9 [ 99.982975][T12745] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 5b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 100.002561][T12745] RSP: 002b:00007ffcba649d58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 100.010951][T12745] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441fb9 [ 100.018906][T12745] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000004 [ 100.026858][T12745] RBP: 0000000000000004 R08: 0000000000000025 R09: 0000000000000025 [ 100.034810][T12745] R10: 0000000000000025 R11: 0000000000000246 R12: 0000000000000000 [ 100.042775][T12745] R13: 0000000000403530 R14: 0000000000000000 R15: 0000000000000000 [ 100.050731][T12745] [ 100.053038][T12745] Uninit was created at: [ 100.057265][T12745] kmsan_internal_poison_shadow+0x5c/0x110 [ 100.063049][T12745] kmsan_slab_alloc+0x97/0x100 [ 100.067787][T12745] __kmalloc_node_track_caller+0xe27/0x11a0 [ 100.073660][T12745] __alloc_skb+0x306/0xa10 [ 100.078052][T12745] alloc_skb_with_frags+0x18c/0xa80 [ 100.083229][T12745] sock_alloc_send_pskb+0xafd/0x10a0 [ 100.088491][T12745] packet_sendmsg+0x63a6/0x9100 [ 100.093329][T12745] ___sys_sendmsg+0x14ff/0x1590 [ 100.098169][T12745] __se_sys_sendmsg+0x305/0x460 [ 100.102999][T12745] __x64_sys_sendmsg+0x4a/0x70 [ 100.107743][T12745] do_syscall_64+0xb6/0x160 [ 100.112229][T12745] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 100.118100][T12745] ===================================================== [ 100.125008][T12745] Disabling lock debugging due to kernel taint [ 100.131137][T12745] Kernel panic - not syncing: panic_on_warn set ... [ 100.137703][T12745] CPU: 1 PID: 12745 Comm: syz-executor929 Tainted: G B 5.4.0-rc8-syzkaller #0 [ 100.147826][T12745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.157857][T12745] Call Trace: [ 100.161132][T12745] dump_stack+0x1c9/0x220 [ 100.165448][T12745] panic+0x3c9/0xc1e [ 100.169334][T12745] kmsan_report+0x215/0x220 [ 100.173850][T12745] __msan_warning+0x64/0xc0 [ 100.178352][T12745] ip_tunnel_xmit+0x3c6/0x3320 [ 100.183116][T12745] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 100.189162][T12745] ? skb_push+0x15b/0x250 [ 100.193479][T12745] ? gre_build_header+0x3ec/0x9f0 [ 100.198497][T12745] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 100.204373][T12745] ipgre_xmit+0xff3/0x1120 [ 100.209299][T12745] ? ipgre_close+0x240/0x240 [ 100.213868][T12745] dev_hard_start_xmit+0x51a/0xab0 [ 100.218962][T12745] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 100.224858][T12745] __dev_queue_xmit+0x35b6/0x4200 [ 100.229874][T12745] dev_queue_xmit+0x4b/0x60 [ 100.234357][T12745] ? netdev_core_pick_tx+0x4d0/0x4d0 [ 100.239621][T12745] packet_sendmsg+0x8234/0x9100 [ 100.244457][T12745] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 100.250516][T12745] ? aa_label_sk_perm+0x6d6/0x940 [ 100.255536][T12745] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 100.261674][T12745] ? kmsan_get_metadata+0x4f/0x290 [ 100.266775][T12745] ? kmsan_internal_set_origin+0x6a/0xb0 [ 100.272390][T12745] ? metadata_is_contiguous+0x270/0x270 [ 100.277917][T12745] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 100.283962][T12745] ? aa_sk_perm+0x730/0xaf0 [ 100.288469][T12745] ? compat_packet_setsockopt+0x360/0x360 [ 100.294168][T12745] ___sys_sendmsg+0x14ff/0x1590 [ 100.298998][T12745] ? kmsan_get_metadata+0x35/0x290 [ 100.304097][T12745] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 100.309970][T12745] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 100.316013][T12745] ? __fget_light+0x1b8/0x710 [ 100.320677][T12745] __se_sys_sendmsg+0x305/0x460 [ 100.325536][T12745] __x64_sys_sendmsg+0x4a/0x70 [ 100.330278][T12745] do_syscall_64+0xb6/0x160 [ 100.334760][T12745] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 100.340627][T12745] RIP: 0033:0x441fb9 [ 100.344500][T12745] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 5b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 100.364087][T12745] RSP: 002b:00007ffcba649d58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 100.372479][T12745] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441fb9 [ 100.380452][T12745] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000004 [ 100.388401][T12745] RBP: 0000000000000004 R08: 0000000000000025 R09: 0000000000000025 [ 100.396357][T12745] R10: 0000000000000025 R11: 0000000000000246 R12: 0000000000000000 [ 100.404310][T12745] R13: 0000000000403530 R14: 0000000000000000 R15: 0000000000000000 [ 100.413694][T12745] Kernel Offset: 0x2c200000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 100.425310][T12745] Rebooting in 86400 seconds..