[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 81.497813][ T31] audit: type=1800 audit(1575002881.545:25): pid=11806 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 81.523452][ T31] audit: type=1800 audit(1575002881.575:26): pid=11806 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 81.571827][ T31] audit: type=1800 audit(1575002881.595:27): pid=11806 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 '10.128.15.226' (ECDSA) to the list of known hosts. syzkaller login: [ 93.795712][T11958] IPVS: ftp: loaded support on port[0] = 21 [ 93.866602][T11958] chnl_net:caif_netlink_parms(): no params data found [ 93.901063][T11958] bridge0: port 1(bridge_slave_0) entered blocking state [ 93.908420][T11958] bridge0: port 1(bridge_slave_0) entered disabled state [ 93.916881][T11958] device bridge_slave_0 entered promiscuous mode [ 93.925690][T11958] bridge0: port 2(bridge_slave_1) entered blocking state [ 93.933106][T11958] bridge0: port 2(bridge_slave_1) entered disabled state [ 93.941090][T11958] device bridge_slave_1 entered promiscuous mode [ 93.962039][T11958] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 93.973666][T11958] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 93.996113][T11958] team0: Port device team_slave_0 added [ 94.003937][T11958] team0: Port device team_slave_1 added [ 94.064584][T11958] device hsr_slave_0 entered promiscuous mode [ 94.132490][T11958] device hsr_slave_1 entered promiscuous mode [ 94.291174][T11958] bridge0: port 2(bridge_slave_1) entered blocking state [ 94.298457][T11958] bridge0: port 2(bridge_slave_1) entered forwarding state [ 94.306263][T11958] bridge0: port 1(bridge_slave_0) entered blocking state [ 94.313520][T11958] bridge0: port 1(bridge_slave_0) entered forwarding state [ 94.421458][T11958] 8021q: adding VLAN 0 to HW filter on device bond0 [ 94.462234][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 94.483272][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 94.522705][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 94.545282][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 94.576995][T11958] 8021q: adding VLAN 0 to HW filter on device team0 [ 94.621465][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 94.630840][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 94.638085][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 94.706947][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 94.716227][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 94.723438][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 94.733576][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 94.743676][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 94.753164][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 94.784782][T11958] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 94.797316][T11958] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 94.869856][T11958] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 94.894343][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 94.902368][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 94.911371][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 94.920354][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program executing program [ 95.243345][T12000] ===================================================== [ 95.250327][T12000] BUG: KMSAN: uninit-value in ip_tunnel_xmit+0x3c6/0x3320 [ 95.257542][T12000] CPU: 0 PID: 12000 Comm: syz-executor182 Not tainted 5.4.0-rc8-syzkaller #0 [ 95.266291][T12000] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.276350][T12000] Call Trace: [ 95.279644][T12000] dump_stack+0x1c9/0x220 [ 95.283957][T12000] kmsan_report+0x128/0x220 [ 95.288878][T12000] __msan_warning+0x64/0xc0 [ 95.293367][T12000] ip_tunnel_xmit+0x3c6/0x3320 [ 95.298130][T12000] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 95.304183][T12000] ? skb_push+0x15b/0x250 [ 95.308503][T12000] ? gre_build_header+0x3ec/0x9f0 [ 95.313512][T12000] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 95.319388][T12000] ipgre_xmit+0xff3/0x1120 [ 95.323804][T12000] ? ipgre_close+0x240/0x240 [ 95.328375][T12000] dev_hard_start_xmit+0x51a/0xab0 [ 95.333497][T12000] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 95.339372][T12000] __dev_queue_xmit+0x35b6/0x4200 [ 95.344402][T12000] dev_queue_xmit+0x4b/0x60 [ 95.348912][T12000] ? netdev_core_pick_tx+0x4d0/0x4d0 [ 95.354188][T12000] packet_sendmsg+0x8234/0x9100 [ 95.359026][T12000] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 95.365080][T12000] ? aa_label_sk_perm+0x6d6/0x940 [ 95.370211][T12000] ? kmsan_get_metadata+0x51/0x350 [ 95.375313][T12000] ? kmsan_internal_set_origin+0x6a/0xb0 [ 95.380985][T12000] ? metadata_is_contiguous+0x270/0x270 [ 95.386528][T12000] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 95.392625][T12000] ? aa_sk_perm+0x730/0xaf0 [ 95.397133][T12000] ? compat_packet_setsockopt+0x360/0x360 [ 95.402847][T12000] __sys_sendto+0xc44/0xc70 [ 95.407342][T12000] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 95.413231][T12000] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 95.419324][T12000] ? prepare_exit_to_usermode+0x19a/0x4d0 [ 95.425037][T12000] __se_sys_sendto+0x107/0x130 [ 95.429795][T12000] __x64_sys_sendto+0x6e/0x90 [ 95.434476][T12000] do_syscall_64+0xb6/0x160 [ 95.438979][T12000] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 95.444858][T12000] RIP: 0033:0x442909 [ 95.448745][T12000] Code: e8 ac 07 03 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 1b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 95.468337][T12000] RSP: 002b:00007ffecd908fc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 95.476755][T12000] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442909 [ 95.484707][T12000] RDX: 000000000000000e RSI: 0000000020000200 RDI: 0000000000000003 [ 95.492661][T12000] RBP: 00000000000173e5 R08: 00000000200000c0 R09: 0000000000000014 [ 95.500614][T12000] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 95.508610][T12000] R13: 0000000000403840 R14: 0000000000000000 R15: 0000000000000000 [ 95.516592][T12000] [ 95.518898][T12000] Uninit was created at: [ 95.523190][T12000] kmsan_internal_poison_shadow+0x5c/0x110 [ 95.528987][T12000] kmsan_slab_alloc+0x97/0x100 [ 95.533743][T12000] __kmalloc_node_track_caller+0xe27/0x11a0 [ 95.539623][T12000] __alloc_skb+0x306/0xa10 [ 95.544042][T12000] alloc_skb_with_frags+0x18c/0xa80 [ 95.549226][T12000] sock_alloc_send_pskb+0xafd/0x10a0 [ 95.554492][T12000] packet_sendmsg+0x63a6/0x9100 [ 95.559325][T12000] __sys_sendto+0xc44/0xc70 [ 95.563818][T12000] __se_sys_sendto+0x107/0x130 [ 95.568663][T12000] __x64_sys_sendto+0x6e/0x90 [ 95.573339][T12000] do_syscall_64+0xb6/0x160 [ 95.577827][T12000] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 95.583697][T12000] ===================================================== [ 95.590610][T12000] Disabling lock debugging due to kernel taint [ 95.596746][T12000] Kernel panic - not syncing: panic_on_warn set ... [ 95.603428][T12000] CPU: 0 PID: 12000 Comm: syz-executor182 Tainted: G B 5.4.0-rc8-syzkaller #0 [ 95.613598][T12000] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.623651][T12000] Call Trace: [ 95.626935][T12000] dump_stack+0x1c9/0x220 [ 95.631304][T12000] panic+0x3c9/0xc1e [ 95.635208][T12000] kmsan_report+0x215/0x220 [ 95.639723][T12000] __msan_warning+0x64/0xc0 [ 95.644344][T12000] ip_tunnel_xmit+0x3c6/0x3320 [ 95.649103][T12000] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 95.655158][T12000] ? skb_push+0x15b/0x250 [ 95.659484][T12000] ? gre_build_header+0x3ec/0x9f0 [ 95.664506][T12000] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 95.670404][T12000] ipgre_xmit+0xff3/0x1120 [ 95.674822][T12000] ? ipgre_close+0x240/0x240 [ 95.679408][T12000] dev_hard_start_xmit+0x51a/0xab0 [ 95.684516][T12000] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 95.690486][T12000] __dev_queue_xmit+0x35b6/0x4200 [ 95.695529][T12000] dev_queue_xmit+0x4b/0x60 [ 95.700041][T12000] ? netdev_core_pick_tx+0x4d0/0x4d0 [ 95.705309][T12000] packet_sendmsg+0x8234/0x9100 [ 95.710168][T12000] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 95.716236][T12000] ? aa_label_sk_perm+0x6d6/0x940 [ 95.721249][T12000] ? kmsan_get_metadata+0x51/0x350 [ 95.726341][T12000] ? kmsan_internal_set_origin+0x6a/0xb0 [ 95.731967][T12000] ? metadata_is_contiguous+0x270/0x270 [ 95.737602][T12000] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 95.743657][T12000] ? aa_sk_perm+0x730/0xaf0 [ 95.748207][T12000] ? compat_packet_setsockopt+0x360/0x360 [ 95.753912][T12000] __sys_sendto+0xc44/0xc70 [ 95.758406][T12000] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 95.764287][T12000] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 95.770345][T12000] ? prepare_exit_to_usermode+0x19a/0x4d0 [ 95.776047][T12000] __se_sys_sendto+0x107/0x130 [ 95.780799][T12000] __x64_sys_sendto+0x6e/0x90 [ 95.785471][T12000] do_syscall_64+0xb6/0x160 [ 95.789955][T12000] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 95.795849][T12000] RIP: 0033:0x442909 [ 95.799745][T12000] Code: e8 ac 07 03 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 1b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 95.819333][T12000] RSP: 002b:00007ffecd908fc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 95.827727][T12000] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442909 [ 95.835694][T12000] RDX: 000000000000000e RSI: 0000000020000200 RDI: 0000000000000003 [ 95.843659][T12000] RBP: 00000000000173e5 R08: 00000000200000c0 R09: 0000000000000014 [ 95.851619][T12000] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 95.859569][T12000] R13: 0000000000403840 R14: 0000000000000000 R15: 0000000000000000 [ 95.868978][T12000] Kernel Offset: 0x17a00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 95.880601][T12000] Rebooting in 86400 seconds..