[....] 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..