[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[   89.361920][   T31] audit: type=1800 audit(1575484361.401:25): pid=12405 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[   89.385291][   T31] audit: type=1800 audit(1575484361.431:26): pid=12405 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[   89.421072][   T31] audit: type=1800 audit(1575484361.451:27): pid=12405 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 '10.128.0.6' (ECDSA) to the list of known hosts.
syzkaller login: [  102.209645][T12558] IPVS: ftp: loaded support on port[0] = 21
[  102.292570][T12558] chnl_net:caif_netlink_parms(): no params data found
[  102.331623][T12558] bridge0: port 1(bridge_slave_0) entered blocking state
[  102.338938][T12558] bridge0: port 1(bridge_slave_0) entered disabled state
[  102.349598][T12558] device bridge_slave_0 entered promiscuous mode
[  102.359119][T12558] bridge0: port 2(bridge_slave_1) entered blocking state
[  102.366501][T12558] bridge0: port 2(bridge_slave_1) entered disabled state
[  102.375545][T12558] device bridge_slave_1 entered promiscuous mode
[  102.399186][T12558] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[  102.412003][T12558] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[  102.436191][T12558] team0: Port device team_slave_0 added
[  102.444653][T12558] team0: Port device team_slave_1 added
[  102.508908][T12558] device hsr_slave_0 entered promiscuous mode
[  102.554784][T12558] device hsr_slave_1 entered promiscuous mode
[  102.689169][T12558] bridge0: port 2(bridge_slave_1) entered blocking state
[  102.696728][T12558] bridge0: port 2(bridge_slave_1) entered forwarding state
[  102.704740][T12558] bridge0: port 1(bridge_slave_0) entered blocking state
[  102.712032][T12558] bridge0: port 1(bridge_slave_0) entered forwarding state
[  102.959153][T12558] 8021q: adding VLAN 0 to HW filter on device bond0
[  102.996240][   T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[  103.015713][   T30] bridge0: port 1(bridge_slave_0) entered disabled state
[  103.036879][   T30] bridge0: port 2(bridge_slave_1) entered disabled state
[  103.056416][   T30] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[  103.100949][T12558] 8021q: adding VLAN 0 to HW filter on device team0
[  103.142881][ T3864] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[  103.152646][ T3864] bridge0: port 1(bridge_slave_0) entered blocking state
[  103.160040][ T3864] bridge0: port 1(bridge_slave_0) entered forwarding state
[  103.227712][ T3864] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[  103.237314][ T3864] bridge0: port 2(bridge_slave_1) entered blocking state
[  103.244580][ T3864] bridge0: port 2(bridge_slave_1) entered forwarding state
[  103.255582][ T3864] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
[  103.266264][ T3864] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[  103.295846][T12558] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network
[  103.306898][T12558] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
[  103.344513][ T3864] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
[  103.352414][ T3864] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
[  103.367574][ T3864] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
[  103.377075][ T3864] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
[  103.386819][ T3864] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
[  103.405950][T12558] 8021q: adding VLAN 0 to HW filter on device batadv0
[  103.444821][ T3864] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
executing program
[  103.701731][T12558] =====================================================
[  103.708739][T12558] BUG: KMSAN: uninit-value in ip_tunnel_xmit+0x3c6/0x3320
[  103.715834][T12558] CPU: 1 PID: 12558 Comm: syz-executor459 Not tainted 5.4.0-rc8-syzkaller #0
[  103.724773][T12558] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  103.734844][T12558] Call Trace:
[  103.738217][T12558]  dump_stack+0x1c9/0x220
[  103.742548][T12558]  kmsan_report+0x128/0x220
[  103.747037][T12558]  __msan_warning+0x57/0xa0
[  103.751539][T12558]  ip_tunnel_xmit+0x3c6/0x3320
[  103.756421][T12558]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  103.762624][T12558]  ? skb_push+0x15b/0x250
[  103.767082][T12558]  ? gre_build_header+0x3ec/0x9f0
[  103.772099][T12558]  ? kmsan_get_shadow_origin_ptr+0x91/0x4d0
[  103.777988][T12558]  ipgre_xmit+0xff3/0x1120
[  103.782577][T12558]  ? ipgre_close+0x240/0x240
[  103.787167][T12558]  dev_hard_start_xmit+0x51a/0xab0
[  103.792269][T12558]  ? kmsan_get_shadow_origin_ptr+0x91/0x4d0
[  103.798171][T12558]  __dev_queue_xmit+0x35b6/0x4200
[  103.803188][T12558]  dev_queue_xmit+0x4b/0x60
[  103.807700][T12558]  ? netdev_core_pick_tx+0x4d0/0x4d0
[  103.812977][T12558]  packet_sendmsg+0x8234/0x9100
[  103.818375][T12558]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  103.824602][T12558]  ? aa_label_sk_perm+0x6d6/0x940
[  103.829640][T12558]  ? __msan_metadata_ptr_for_store_8+0x13/0x20
[  103.835774][T12558]  ? kmsan_get_metadata+0x4f/0x290
[  103.840882][T12558]  ? kmsan_internal_set_origin+0x6a/0xb0
[  103.846518][T12558]  ? metadata_is_contiguous+0x270/0x270
[  103.852150][T12558]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  103.858391][T12558]  ? aa_sk_perm+0x730/0xaf0
[  103.862918][T12558]  ? compat_packet_setsockopt+0x360/0x360
[  103.868659][T12558]  ___sys_sendmsg+0x14ff/0x1590
[  103.873518][T12558]  ? kmsan_get_shadow_origin_ptr+0x91/0x4d0
[  103.879395][T12558]  ? __msan_metadata_ptr_for_load_4+0x10/0x20
[  103.885443][T12558]  ? __fget_light+0x1b8/0x710
[  103.890123][T12558]  __se_sys_sendmsg+0x305/0x460
[  103.894981][T12558]  __x64_sys_sendmsg+0x4a/0x70
[  103.899743][T12558]  do_syscall_64+0xb6/0x160
[  103.904257][T12558]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  103.910350][T12558] RIP: 0033:0x441fb9
[  103.915029][T12558] 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
[  103.935519][T12558] RSP: 002b:00007ffd3dc74b68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  103.944068][T12558] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441fb9
[  103.952075][T12558] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000004
[  103.960043][T12558] RBP: 0000000000000004 R08: 0000000000000025 R09: 0000000000000025
[  103.968014][T12558] R10: 0000000000000025 R11: 0000000000000246 R12: 0000000000000000
[  103.976680][T12558] R13: 0000000000403530 R14: 0000000000000000 R15: 0000000000000000
[  103.985301][T12558] 
[  103.989184][T12558] Uninit was created at:
[  103.994659][T12558]  kmsan_internal_poison_shadow+0x5c/0x110
[  104.001274][T12558]  kmsan_slab_alloc+0x8a/0xe0
[  104.006080][T12558]  __kmalloc_node_track_caller+0xe27/0x11a0
[  104.012168][T12558]  __alloc_skb+0x306/0xa10
[  104.016567][T12558]  alloc_skb_with_frags+0x18c/0xa80
[  104.021745][T12558]  sock_alloc_send_pskb+0xafd/0x10a0
[  104.027153][T12558]  packet_sendmsg+0x63a6/0x9100
[  104.032273][T12558]  ___sys_sendmsg+0x14ff/0x1590
[  104.037233][T12558]  __se_sys_sendmsg+0x305/0x460
[  104.042348][T12558]  __x64_sys_sendmsg+0x4a/0x70
[  104.047112][T12558]  do_syscall_64+0xb6/0x160
[  104.051612][T12558]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  104.057493][T12558] =====================================================
[  104.064413][T12558] Disabling lock debugging due to kernel taint
[  104.070555][T12558] Kernel panic - not syncing: panic_on_warn set ...
[  104.077140][T12558] CPU: 1 PID: 12558 Comm: syz-executor459 Tainted: G    B             5.4.0-rc8-syzkaller #0
[  104.087386][T12558] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  104.097428][T12558] Call Trace:
[  104.100706][T12558]  dump_stack+0x1c9/0x220
[  104.105020][T12558]  panic+0x3c9/0xc1e
[  104.108926][T12558]  kmsan_report+0x215/0x220
[  104.113427][T12558]  __msan_warning+0x57/0xa0
[  104.118177][T12558]  ip_tunnel_xmit+0x3c6/0x3320
[  104.122924][T12558]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  104.128980][T12558]  ? skb_push+0x15b/0x250
[  104.133296][T12558]  ? gre_build_header+0x3ec/0x9f0
[  104.138332][T12558]  ? kmsan_get_shadow_origin_ptr+0x91/0x4d0
[  104.144207][T12558]  ipgre_xmit+0xff3/0x1120
[  104.148623][T12558]  ? ipgre_close+0x240/0x240
[  104.153208][T12558]  dev_hard_start_xmit+0x51a/0xab0
[  104.158306][T12558]  ? kmsan_get_shadow_origin_ptr+0x91/0x4d0
[  104.164208][T12558]  __dev_queue_xmit+0x35b6/0x4200
[  104.169247][T12558]  dev_queue_xmit+0x4b/0x60
[  104.173826][T12558]  ? netdev_core_pick_tx+0x4d0/0x4d0
[  104.179115][T12558]  packet_sendmsg+0x8234/0x9100
[  104.183977][T12558]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  104.190056][T12558]  ? aa_label_sk_perm+0x6d6/0x940
[  104.195216][T12558]  ? __msan_metadata_ptr_for_store_8+0x13/0x20
[  104.201522][T12558]  ? kmsan_get_metadata+0x4f/0x290
[  104.206728][T12558]  ? kmsan_internal_set_origin+0x6a/0xb0
[  104.212343][T12558]  ? metadata_is_contiguous+0x270/0x270
[  104.218310][T12558]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  104.224368][T12558]  ? aa_sk_perm+0x730/0xaf0
[  104.228887][T12558]  ? compat_packet_setsockopt+0x360/0x360
[  104.234608][T12558]  ___sys_sendmsg+0x14ff/0x1590
[  104.239453][T12558]  ? kmsan_get_shadow_origin_ptr+0x91/0x4d0
[  104.245504][T12558]  ? __msan_metadata_ptr_for_load_4+0x10/0x20
[  104.251554][T12558]  ? __fget_light+0x1b8/0x710
[  104.256222][T12558]  __se_sys_sendmsg+0x305/0x460
[  104.264248][T12558]  __x64_sys_sendmsg+0x4a/0x70
[  104.269088][T12558]  do_syscall_64+0xb6/0x160
[  104.273603][T12558]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  104.279580][T12558] RIP: 0033:0x441fb9
[  104.283470][T12558] 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
[  104.303605][T12558] RSP: 002b:00007ffd3dc74b68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  104.312262][T12558] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441fb9
[  104.320250][T12558] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000004
[  104.328236][T12558] RBP: 0000000000000004 R08: 0000000000000025 R09: 0000000000000025
[  104.336244][T12558] R10: 0000000000000025 R11: 0000000000000246 R12: 0000000000000000
[  104.344446][T12558] R13: 0000000000403530 R14: 0000000000000000 R15: 0000000000000000
[  104.354098][T12558] Kernel Offset: 0x16400000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[  104.365748][T12558] Rebooting in 86400 seconds..