[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 87.745502][ T32] audit: type=1800 audit(1572494189.802:25): pid=12425 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 87.782317][ T32] audit: type=1800 audit(1572494189.832:26): pid=12425 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 87.802650][ T32] audit: type=1800 audit(1572494189.832:27): pid=12425 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 '10.128.0.9' (ECDSA) to the list of known hosts. syzkaller login: [ 98.746221][T12578] IPVS: ftp: loaded support on port[0] = 21 [ 98.819622][T12578] chnl_net:caif_netlink_parms(): no params data found [ 98.857694][T12578] bridge0: port 1(bridge_slave_0) entered blocking state [ 98.864924][T12578] bridge0: port 1(bridge_slave_0) entered disabled state [ 98.873799][T12578] device bridge_slave_0 entered promiscuous mode [ 98.882281][T12578] bridge0: port 2(bridge_slave_1) entered blocking state [ 98.889433][T12578] bridge0: port 2(bridge_slave_1) entered disabled state [ 98.897904][T12578] device bridge_slave_1 entered promiscuous mode [ 98.920342][T12578] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 98.932097][T12578] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 98.955313][T12578] team0: Port device team_slave_0 added [ 98.963528][T12578] team0: Port device team_slave_1 added [ 99.025230][T12578] device hsr_slave_0 entered promiscuous mode [ 99.062625][T12578] device hsr_slave_1 entered promiscuous mode [ 99.215219][T12578] bridge0: port 2(bridge_slave_1) entered blocking state [ 99.222551][T12578] bridge0: port 2(bridge_slave_1) entered forwarding state [ 99.230332][T12578] bridge0: port 1(bridge_slave_0) entered blocking state [ 99.237718][T12578] bridge0: port 1(bridge_slave_0) entered forwarding state [ 99.458154][T12578] 8021q: adding VLAN 0 to HW filter on device bond0 [ 99.517637][ T3683] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 99.535995][ T3683] bridge0: port 1(bridge_slave_0) entered disabled state [ 99.563382][ T3683] bridge0: port 2(bridge_slave_1) entered disabled state [ 99.594974][ T3683] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 99.650171][T12578] 8021q: adding VLAN 0 to HW filter on device team0 [ 99.694700][ T3683] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 99.703956][ T3683] bridge0: port 1(bridge_slave_0) entered blocking state [ 99.711167][ T3683] bridge0: port 1(bridge_slave_0) entered forwarding state [ 99.785727][ T3683] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 99.795416][ T3683] bridge0: port 2(bridge_slave_1) entered blocking state [ 99.802735][ T3683] bridge0: port 2(bridge_slave_1) entered forwarding state [ 99.813494][ T3683] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 99.823990][ T3683] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 99.860016][T12578] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 99.870639][T12578] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 99.944695][ T3683] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 99.953866][ T3683] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 99.964928][ T3683] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 99.999481][T12578] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 100.042242][ T3683] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 100.181009][T12578] ===================================================== [ 100.188031][T12578] BUG: KMSAN: uninit-value in ip_tunnel_xmit+0x3c6/0x3320 [ 100.195161][T12578] CPU: 1 PID: 12578 Comm: syz-executor032 Not tainted 5.4.0-rc5+ #0 [ 100.203139][T12578] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.213182][T12578] Call Trace: [ 100.216463][T12578] dump_stack+0x191/0x1f0 [ 100.220791][T12578] kmsan_report+0x128/0x220 [ 100.225304][T12578] __msan_warning+0x73/0xe0 [ 100.229793][T12578] ip_tunnel_xmit+0x3c6/0x3320 [ 100.234549][T12578] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 100.240595][T12578] ? skb_push+0x15b/0x250 [ 100.244913][T12578] ? gre_build_header+0x3ec/0x9f0 [ 100.250049][T12578] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.255930][T12578] ipgre_xmit+0xff3/0x1120 [ 100.260341][T12578] ? ipgre_close+0x240/0x240 [ 100.264915][T12578] dev_hard_start_xmit+0x51a/0xab0 [ 100.270025][T12578] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.275907][T12578] __dev_queue_xmit+0x35b6/0x4200 [ 100.280926][T12578] dev_queue_xmit+0x4b/0x60 [ 100.285413][T12578] ? netdev_core_pick_tx+0x4d0/0x4d0 [ 100.290684][T12578] packet_sendmsg+0x82d7/0x92e0 [ 100.295523][T12578] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 100.301576][T12578] ? aa_label_sk_perm+0x6d6/0x940 [ 100.306591][T12578] ? kmsan_get_metadata+0x39/0x350 [ 100.311685][T12578] ? kmsan_internal_set_origin+0x6a/0xb0 [ 100.317305][T12578] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.323203][T12578] ? aa_sk_perm+0x730/0xaf0 [ 100.327711][T12578] ? compat_packet_setsockopt+0x360/0x360 [ 100.333413][T12578] ___sys_sendmsg+0x14ff/0x1590 [ 100.338263][T12578] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.344145][T12578] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 100.350194][T12578] ? __fget_light+0x1b8/0x710 [ 100.354892][T12578] __se_sys_sendmsg+0x305/0x460 [ 100.359734][T12578] __x64_sys_sendmsg+0x4a/0x70 [ 100.364479][T12578] do_syscall_64+0xb6/0x160 [ 100.368969][T12578] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 100.374861][T12578] RIP: 0033:0x441a09 [ 100.378738][T12578] 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 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 100.398327][T12578] RSP: 002b:00007fffd7d81b18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 100.406732][T12578] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441a09 [ 100.414690][T12578] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 100.422643][T12578] RBP: 00007fffd7d81b30 R08: 0000000001bbbbbb R09: 0000000001bbbbbb [ 100.430598][T12578] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 100.438832][T12578] R13: 0000000000402fa0 R14: 0000000000000000 R15: 0000000000000000 [ 100.446797][T12578] [ 100.449118][T12578] Uninit was created at: [ 100.453365][T12578] kmsan_internal_poison_shadow+0x60/0x120 [ 100.459151][T12578] kmsan_slab_alloc+0xaa/0x120 [ 100.463910][T12578] __kmalloc_node_track_caller+0xd7b/0x1390 [ 100.469800][T12578] __alloc_skb+0x306/0xa10 [ 100.474207][T12578] alloc_skb_with_frags+0x18c/0xa80 [ 100.479384][T12578] sock_alloc_send_pskb+0xafd/0x10a0 [ 100.484672][T12578] packet_sendmsg+0x6785/0x92e0 [ 100.489514][T12578] ___sys_sendmsg+0x14ff/0x1590 [ 100.494359][T12578] __se_sys_sendmsg+0x305/0x460 [ 100.499190][T12578] __x64_sys_sendmsg+0x4a/0x70 [ 100.503950][T12578] do_syscall_64+0xb6/0x160 [ 100.508444][T12578] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 100.514327][T12578] ===================================================== [ 100.521320][T12578] Disabling lock debugging due to kernel taint [ 100.527448][T12578] Kernel panic - not syncing: panic_on_warn set ... [ 100.534019][T12578] CPU: 1 PID: 12578 Comm: syz-executor032 Tainted: G B 5.4.0-rc5+ #0 [ 100.543383][T12578] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.553541][T12578] Call Trace: [ 100.556855][T12578] dump_stack+0x191/0x1f0 [ 100.561363][T12578] panic+0x3c9/0xc1e [ 100.565372][T12578] kmsan_report+0x215/0x220 [ 100.569871][T12578] __msan_warning+0x73/0xe0 [ 100.574368][T12578] ip_tunnel_xmit+0x3c6/0x3320 [ 100.579144][T12578] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 100.585197][T12578] ? skb_push+0x15b/0x250 [ 100.589516][T12578] ? gre_build_header+0x3ec/0x9f0 [ 100.594530][T12578] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.600414][T12578] ipgre_xmit+0xff3/0x1120 [ 100.604824][T12578] ? ipgre_close+0x240/0x240 [ 100.609396][T12578] dev_hard_start_xmit+0x51a/0xab0 [ 100.614502][T12578] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.620380][T12578] __dev_queue_xmit+0x35b6/0x4200 [ 100.625406][T12578] dev_queue_xmit+0x4b/0x60 [ 100.629900][T12578] ? netdev_core_pick_tx+0x4d0/0x4d0 [ 100.638388][T12578] packet_sendmsg+0x82d7/0x92e0 [ 100.643228][T12578] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 100.649290][T12578] ? aa_label_sk_perm+0x6d6/0x940 [ 100.654325][T12578] ? kmsan_get_metadata+0x39/0x350 [ 100.659421][T12578] ? kmsan_internal_set_origin+0x6a/0xb0 [ 100.665055][T12578] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.670933][T12578] ? aa_sk_perm+0x730/0xaf0 [ 100.675439][T12578] ? compat_packet_setsockopt+0x360/0x360 [ 100.681141][T12578] ___sys_sendmsg+0x14ff/0x1590 [ 100.685990][T12578] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.691865][T12578] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 100.697923][T12578] ? __fget_light+0x1b8/0x710 [ 100.702600][T12578] __se_sys_sendmsg+0x305/0x460 [ 100.707448][T12578] __x64_sys_sendmsg+0x4a/0x70 [ 100.712208][T12578] do_syscall_64+0xb6/0x160 [ 100.716726][T12578] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 100.722616][T12578] RIP: 0033:0x441a09 [ 100.726493][T12578] 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 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 100.746088][T12578] RSP: 002b:00007fffd7d81b18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 100.754512][T12578] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441a09 [ 100.762471][T12578] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 100.770434][T12578] RBP: 00007fffd7d81b30 R08: 0000000001bbbbbb R09: 0000000001bbbbbb [ 100.778397][T12578] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 100.786351][T12578] R13: 0000000000402fa0 R14: 0000000000000000 R15: 0000000000000000 [ 100.795710][T12578] Kernel Offset: disabled [ 100.800061][T12578] Rebooting in 86400 seconds..