[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 88.750442] audit: type=1800 audit(1545796889.804:25): pid=10837 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 88.769714] audit: type=1800 audit(1545796889.804:26): pid=10837 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 88.789198] audit: type=1800 audit(1545796889.834:27): pid=10837 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 '10.128.10.0' (ECDSA) to the list of known hosts. RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available syzkaller login: [ 110.603906] IPVS: ftp: loaded support on port[0] = 21 [ 110.887461] bridge0: port 1(bridge_slave_0) entered blocking state [ 110.894397] bridge0: port 1(bridge_slave_0) entered disabled state [ 110.902230] device bridge_slave_0 entered promiscuous mode [ 110.931994] bridge0: port 2(bridge_slave_1) entered blocking state [ 110.938812] bridge0: port 2(bridge_slave_1) entered disabled state [ 110.946940] device bridge_slave_1 entered promiscuous mode [ 110.976046] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 111.005097] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 111.092703] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 111.124551] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 111.258696] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 111.266746] team0: Port device team_slave_0 added [ 111.296029] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 111.304116] team0: Port device team_slave_1 added [ 111.333347] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 111.366220] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 111.397743] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 111.429216] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available [ 111.720049] bridge0: port 2(bridge_slave_1) entered blocking state [ 111.726691] bridge0: port 2(bridge_slave_1) entered forwarding state [ 111.734122] bridge0: port 1(bridge_slave_0) entered blocking state [ 111.740683] bridge0: port 1(bridge_slave_0) entered forwarding state RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 112.750897] 8021q: adding VLAN 0 to HW filter on device bond0 [ 112.847437] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 112.944321] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 112.950562] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 112.958477] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 113.055888] 8021q: adding VLAN 0 to HW filter on device team0 executing program [ 113.594946] ================================================================== [ 113.602454] BUG: KMSAN: uninit-value in check_6rd+0x65c/0x720 [ 113.608341] CPU: 1 PID: 10988 Comm: syz-executor484 Not tainted 4.20.0-rc7+ #14 [ 113.615779] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.625141] Call Trace: [ 113.627729] dump_stack+0x173/0x1d0 [ 113.631363] kmsan_report+0x12e/0x2a0 [ 113.635163] __msan_warning+0x82/0xf0 [ 113.638967] check_6rd+0x65c/0x720 [ 113.642520] sit_tunnel_xmit+0xb58/0x34d0 [ 113.646674] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 113.652041] ? dev_hard_start_xmit+0xb3/0xc40 [ 113.656535] ? ipip6_tunnel_uninit+0x7e0/0x7e0 [ 113.661114] dev_hard_start_xmit+0x607/0xc40 [ 113.665543] __dev_queue_xmit+0x2e42/0x3bc0 [ 113.669910] dev_queue_xmit+0x4b/0x60 [ 113.673707] ? __netdev_pick_tx+0x1270/0x1270 [ 113.678199] packet_sendmsg+0x8306/0x8f30 [ 113.682374] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 113.687849] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 113.693308] ? rw_copy_check_uvector+0x149/0x6a0 [ 113.698103] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 113.703508] ___sys_sendmsg+0xdb9/0x11b0 [ 113.707608] ? compat_packet_setsockopt+0x360/0x360 [ 113.712640] ? __fget_light+0x60/0x750 [ 113.716548] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 113.721903] ? __fget_light+0x1fe/0x750 [ 113.725893] __se_sys_sendmsg+0x305/0x460 [ 113.730056] __x64_sys_sendmsg+0x4a/0x70 [ 113.734113] do_syscall_64+0xbc/0xf0 [ 113.737841] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 113.743022] RIP: 0033:0x441219 [ 113.746241] 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 db 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 113.765133] RSP: 002b:00007ffd0f81df68 EFLAGS: 00000286 ORIG_RAX: 000000000000002e [ 113.772834] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441219 [ 113.780092] RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 [ 113.787350] RBP: 00000000006cc018 R08: 0000000000000100 R09: 0000000000000100 [ 113.794612] R10: 0000000000000100 R11: 0000000000000286 R12: 0000000000402180 [ 113.801870] R13: 0000000000402210 R14: 0000000000000000 R15: 0000000000000000 [ 113.809143] [ 113.810759] Uninit was created at: [ 113.814297] kmsan_internal_poison_shadow+0x92/0x150 [ 113.819392] kmsan_kmalloc+0xa6/0x130 [ 113.823184] kmsan_slab_alloc+0xe/0x10 [ 113.827062] __kmalloc_node_track_caller+0xe38/0x1060 [ 113.832239] __alloc_skb+0x309/0xa20 [ 113.835953] alloc_skb_with_frags+0x1c7/0xaf0 [ 113.840455] sock_alloc_send_pskb+0xafd/0x10e0 [ 113.845031] packet_sendmsg+0x661a/0x8f30 [ 113.849169] ___sys_sendmsg+0xdb9/0x11b0 [ 113.853231] __se_sys_sendmsg+0x305/0x460 [ 113.857383] __x64_sys_sendmsg+0x4a/0x70 [ 113.861436] do_syscall_64+0xbc/0xf0 [ 113.865144] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 113.870323] ================================================================== [ 113.877665] Disabling lock debugging due to kernel taint [ 113.883252] Kernel panic - not syncing: panic_on_warn set ... [ 113.889133] CPU: 1 PID: 10988 Comm: syz-executor484 Tainted: G B 4.20.0-rc7+ #14 [ 113.897957] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.907319] Call Trace: [ 113.909906] dump_stack+0x173/0x1d0 [ 113.913553] panic+0x3ce/0x961 [ 113.916812] kmsan_report+0x293/0x2a0 [ 113.920622] __msan_warning+0x82/0xf0 [ 113.924426] check_6rd+0x65c/0x720 [ 113.927978] sit_tunnel_xmit+0xb58/0x34d0 [ 113.932132] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 113.937502] ? dev_hard_start_xmit+0xb3/0xc40 [ 113.942002] ? ipip6_tunnel_uninit+0x7e0/0x7e0 [ 113.946582] dev_hard_start_xmit+0x607/0xc40 [ 113.951010] __dev_queue_xmit+0x2e42/0x3bc0 [ 113.955383] dev_queue_xmit+0x4b/0x60 [ 113.959177] ? __netdev_pick_tx+0x1270/0x1270 [ 113.963678] packet_sendmsg+0x8306/0x8f30 [ 113.967856] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 113.973306] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 113.978751] ? rw_copy_check_uvector+0x149/0x6a0 [ 113.983526] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 113.988936] ___sys_sendmsg+0xdb9/0x11b0 [ 113.993002] ? compat_packet_setsockopt+0x360/0x360 [ 113.998032] ? __fget_light+0x60/0x750 [ 114.001916] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 114.007267] ? __fget_light+0x1fe/0x750 [ 114.011302] __se_sys_sendmsg+0x305/0x460 [ 114.015473] __x64_sys_sendmsg+0x4a/0x70 [ 114.019530] do_syscall_64+0xbc/0xf0 [ 114.023246] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 114.028427] RIP: 0033:0x441219 [ 114.031612] 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 db 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 114.050503] RSP: 002b:00007ffd0f81df68 EFLAGS: 00000286 ORIG_RAX: 000000000000002e [ 114.058230] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441219 [ 114.065492] RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 [ 114.072749] RBP: 00000000006cc018 R08: 0000000000000100 R09: 0000000000000100 [ 114.080011] R10: 0000000000000100 R11: 0000000000000286 R12: 0000000000402180 [ 114.087270] R13: 0000000000402210 R14: 0000000000000000 R15: 0000000000000000 [ 114.095487] Kernel Offset: disabled [ 114.099118] Rebooting in 86400 seconds..