[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 84.325785][ T32] audit: type=1800 audit(1574446779.395:25): pid=12062 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 84.349531][ T32] audit: type=1800 audit(1574446779.415:26): pid=12062 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 84.396198][ T32] audit: type=1800 audit(1574446779.445:27): pid=12062 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 '10.128.0.147' (ECDSA) to the list of known hosts. syzkaller login: [ 94.671185][T12212] IPVS: ftp: loaded support on port[0] = 21 [ 94.740773][T12212] chnl_net:caif_netlink_parms(): no params data found [ 94.775947][T12212] bridge0: port 1(bridge_slave_0) entered blocking state [ 94.783450][T12212] bridge0: port 1(bridge_slave_0) entered disabled state [ 94.791425][T12212] device bridge_slave_0 entered promiscuous mode [ 94.800099][T12212] bridge0: port 2(bridge_slave_1) entered blocking state [ 94.807551][T12212] bridge0: port 2(bridge_slave_1) entered disabled state [ 94.815878][T12212] device bridge_slave_1 entered promiscuous mode [ 94.836564][T12212] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 94.848163][T12212] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 94.871002][T12212] team0: Port device team_slave_0 added [ 94.878990][T12212] team0: Port device team_slave_1 added [ 94.935082][T12212] device hsr_slave_0 entered promiscuous mode [ 94.982820][T12212] device hsr_slave_1 entered promiscuous mode [ 95.164840][T12212] bridge0: port 2(bridge_slave_1) entered blocking state [ 95.172177][T12212] bridge0: port 2(bridge_slave_1) entered forwarding state [ 95.179868][T12212] bridge0: port 1(bridge_slave_0) entered blocking state [ 95.187185][T12212] bridge0: port 1(bridge_slave_0) entered forwarding state [ 95.407636][T12212] 8021q: adding VLAN 0 to HW filter on device bond0 [ 95.444526][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 95.463903][ T31] bridge0: port 1(bridge_slave_0) entered disabled state [ 95.494004][ T31] bridge0: port 2(bridge_slave_1) entered disabled state [ 95.524640][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 95.562485][T12212] 8021q: adding VLAN 0 to HW filter on device team0 [ 95.593448][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 95.602601][ T31] bridge0: port 1(bridge_slave_0) entered blocking state [ 95.609770][ T31] bridge0: port 1(bridge_slave_0) entered forwarding state [ 95.618583][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 95.627676][ T31] bridge0: port 2(bridge_slave_1) entered blocking state [ 95.635058][ T31] bridge0: port 2(bridge_slave_1) entered forwarding state [ 95.710020][T12212] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 95.720998][T12212] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 95.776061][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 95.786247][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 95.796740][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 95.806282][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 95.868126][T12212] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 95.903303][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 95.913448][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 95.921953][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 95.929656][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 96.083859][T12212] ===================================================== [ 96.091636][T12212] BUG: KMSAN: uninit-value in ip_tunnel_xmit+0x3c6/0x3320 [ 96.098912][T12212] CPU: 1 PID: 12212 Comm: syz-executor527 Not tainted 5.4.0-rc5-syzkaller #0 [ 96.107703][T12212] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.117761][T12212] Call Trace: [ 96.121042][T12212] dump_stack+0x191/0x1f0 [ 96.125358][T12212] kmsan_report+0x128/0x220 [ 96.130014][T12212] __msan_warning+0x64/0xc0 [ 96.134505][T12212] ip_tunnel_xmit+0x3c6/0x3320 [ 96.139381][T12212] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 96.145434][T12212] ? skb_push+0x15b/0x250 [ 96.149752][T12212] ? gre_build_header+0x3ec/0x9f0 [ 96.154781][T12212] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 96.160657][T12212] ipgre_xmit+0xff3/0x1120 [ 96.165060][T12212] ? ipgre_close+0x240/0x240 [ 96.169627][T12212] dev_hard_start_xmit+0x51a/0xab0 [ 96.175004][T12212] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 96.181121][T12212] __dev_queue_xmit+0x35b6/0x4200 [ 96.186255][T12212] dev_queue_xmit+0x4b/0x60 [ 96.190748][T12212] ? netdev_core_pick_tx+0x4d0/0x4d0 [ 96.196090][T12212] packet_sendmsg+0x8234/0x9100 [ 96.200929][T12212] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 96.206998][T12212] ? aa_label_sk_perm+0x6d6/0x940 [ 96.212012][T12212] ? kmsan_get_metadata+0x51/0x350 [ 96.217119][T12212] ? kmsan_internal_set_origin+0x6a/0xb0 [ 96.222840][T12212] ? slabs_cpu_partial_show+0x130/0x780 [ 96.228384][T12212] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 96.234458][T12212] ? aa_sk_perm+0x730/0xaf0 [ 96.238968][T12212] ? compat_packet_setsockopt+0x360/0x360 [ 96.244665][T12212] ___sys_sendmsg+0x14ff/0x1590 [ 96.249695][T12212] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 96.255583][T12212] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 96.261997][T12212] ? __fget_light+0x1b8/0x710 [ 96.268002][T12212] __se_sys_sendmsg+0x305/0x460 [ 96.272856][T12212] __x64_sys_sendmsg+0x4a/0x70 [ 96.277617][T12212] do_syscall_64+0xb6/0x160 [ 96.282130][T12212] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 96.288101][T12212] RIP: 0033:0x441fb9 [ 96.291995][T12212] 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 [ 96.311728][T12212] RSP: 002b:00007fffef12ea58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 96.320210][T12212] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441fb9 [ 96.328159][T12212] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 96.336720][T12212] RBP: 0000000000000004 R08: 0000000000000025 R09: 0000000000000025 [ 96.345279][T12212] R10: 0000000000000025 R11: 0000000000000246 R12: 0000000000000000 [ 96.353592][T12212] R13: 0000000000403530 R14: 0000000000000000 R15: 0000000000000000 [ 96.361566][T12212] [ 96.363875][T12212] Uninit was created at: [ 96.368105][T12212] kmsan_internal_poison_shadow+0x60/0x120 [ 96.373903][T12212] kmsan_slab_alloc+0x97/0x100 [ 96.378644][T12212] __kmalloc_node_track_caller+0xe27/0x11a0 [ 96.384539][T12212] __alloc_skb+0x306/0xa10 [ 96.388944][T12212] alloc_skb_with_frags+0x18c/0xa80 [ 96.394120][T12212] sock_alloc_send_pskb+0xafd/0x10a0 [ 96.399382][T12212] packet_sendmsg+0x63a6/0x9100 [ 96.404236][T12212] ___sys_sendmsg+0x14ff/0x1590 [ 96.409079][T12212] __se_sys_sendmsg+0x305/0x460 [ 96.413911][T12212] __x64_sys_sendmsg+0x4a/0x70 [ 96.418657][T12212] do_syscall_64+0xb6/0x160 [ 96.423149][T12212] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 96.429023][T12212] ===================================================== [ 96.435937][T12212] Disabling lock debugging due to kernel taint [ 96.442074][T12212] Kernel panic - not syncing: panic_on_warn set ... [ 96.448648][T12212] CPU: 1 PID: 12212 Comm: syz-executor527 Tainted: G B 5.4.0-rc5-syzkaller #0 [ 96.460523][T12212] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.473178][T12212] Call Trace: [ 96.476825][T12212] dump_stack+0x191/0x1f0 [ 96.481164][T12212] panic+0x3c9/0xc1e [ 96.485104][T12212] kmsan_report+0x215/0x220 [ 96.489634][T12212] __msan_warning+0x64/0xc0 [ 96.494134][T12212] ip_tunnel_xmit+0x3c6/0x3320 [ 96.498895][T12212] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 96.504956][T12212] ? skb_push+0x15b/0x250 [ 96.509272][T12212] ? gre_build_header+0x3ec/0x9f0 [ 96.514284][T12212] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 96.520252][T12212] ipgre_xmit+0xff3/0x1120 [ 96.524660][T12212] ? ipgre_close+0x240/0x240 [ 96.529374][T12212] dev_hard_start_xmit+0x51a/0xab0 [ 96.535294][T12212] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 96.541184][T12212] __dev_queue_xmit+0x35b6/0x4200 [ 96.546204][T12212] dev_queue_xmit+0x4b/0x60 [ 96.550708][T12212] ? netdev_core_pick_tx+0x4d0/0x4d0 [ 96.555971][T12212] packet_sendmsg+0x8234/0x9100 [ 96.560810][T12212] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 96.566880][T12212] ? aa_label_sk_perm+0x6d6/0x940 [ 96.571920][T12212] ? kmsan_get_metadata+0x51/0x350 [ 96.577018][T12212] ? kmsan_internal_set_origin+0x6a/0xb0 [ 96.582640][T12212] ? slabs_cpu_partial_show+0x130/0x780 [ 96.588171][T12212] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 96.594216][T12212] ? aa_sk_perm+0x730/0xaf0 [ 96.598720][T12212] ? compat_packet_setsockopt+0x360/0x360 [ 96.604431][T12212] ___sys_sendmsg+0x14ff/0x1590 [ 96.609283][T12212] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 96.615158][T12212] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 96.621549][T12212] ? __fget_light+0x1b8/0x710 [ 96.626214][T12212] __se_sys_sendmsg+0x305/0x460 [ 96.631051][T12212] __x64_sys_sendmsg+0x4a/0x70 [ 96.635803][T12212] do_syscall_64+0xb6/0x160 [ 96.640285][T12212] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 96.646155][T12212] RIP: 0033:0x441fb9 [ 96.650092][T12212] 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 [ 96.670068][T12212] RSP: 002b:00007fffef12ea58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 96.678493][T12212] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441fb9 [ 96.686456][T12212] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 96.694422][T12212] RBP: 0000000000000004 R08: 0000000000000025 R09: 0000000000000025 [ 96.702384][T12212] R10: 0000000000000025 R11: 0000000000000246 R12: 0000000000000000 [ 96.710343][T12212] R13: 0000000000403530 R14: 0000000000000000 R15: 0000000000000000 [ 96.719756][T12212] Kernel Offset: 0x2f000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 96.731374][T12212] Rebooting in 86400 seconds..