[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 65.206425] audit: type=1800 audit(1547099891.266:25): pid=9854 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 65.225509] audit: type=1800 audit(1547099891.276:26): pid=9854 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 65.244826] audit: type=1800 audit(1547099891.286:27): pid=9854 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 '10.128.0.106' (ECDSA) to the list of known hosts. syzkaller login: [ 75.990684] IPVS: ftp: loaded support on port[0] = 21 [ 76.050684] chnl_net:caif_netlink_parms(): no params data found [ 76.083827] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.090335] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.097809] device bridge_slave_0 entered promiscuous mode [ 76.105019] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.111389] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.119177] device bridge_slave_1 entered promiscuous mode [ 76.138058] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 76.147350] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 76.164795] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 76.172699] team0: Port device team_slave_0 added [ 76.178244] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 76.186160] team0: Port device team_slave_1 added [ 76.191754] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 76.199260] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 76.254255] device hsr_slave_0 entered promiscuous mode [ 76.302030] device hsr_slave_1 entered promiscuous mode [ 76.342336] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 76.349417] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 76.365253] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.371757] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.378522] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.385006] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.425563] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 76.431947] 8021q: adding VLAN 0 to HW filter on device bond0 [ 76.440442] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 76.450644] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 76.459308] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.467082] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.474962] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 76.486685] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 76.492815] 8021q: adding VLAN 0 to HW filter on device team0 [ 76.503191] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 76.511070] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.517589] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.528466] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 76.536820] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.543323] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.562526] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 76.570479] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 76.590812] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 76.600595] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 76.611275] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 76.618374] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 76.626433] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 76.634222] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 76.642433] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 76.658345] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 76.669780] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 76.721827] ================================================================== [ 76.729209] BUG: KMSAN: uninit-value in batadv_interface_tx+0x908/0x1e40 [ 76.736028] CPU: 0 PID: 10006 Comm: syz-executor469 Not tainted 4.20.0-rc7+ #5 [ 76.743374] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.752704] Call Trace: [ 76.755273] dump_stack+0x173/0x1d0 [ 76.758888] kmsan_report+0x12e/0x2a0 [ 76.762681] __msan_warning+0x82/0xf0 [ 76.766461] batadv_interface_tx+0x908/0x1e40 [ 76.770936] ? ext4_flex_group_add+0x5141/0xa8d0 [ 76.775674] ? batadv_softif_is_valid+0xb0/0xb0 [ 76.780449] dev_hard_start_xmit+0x607/0xc40 [ 76.784871] __dev_queue_xmit+0x2e42/0x3bc0 [ 76.789313] dev_queue_xmit+0x4b/0x60 [ 76.793095] ? __netdev_pick_tx+0x1270/0x1270 [ 76.797667] packet_sendmsg+0x8306/0x8f30 [ 76.801799] ? rcu_check_callbacks+0x2110/0x2110 [ 76.806536] ? wait_for_completion+0x3e/0x50 [ 76.810921] ? __wait_rcu_gp+0x579/0x5e0 [ 76.814969] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 76.820427] ? compat_packet_setsockopt+0x360/0x360 [ 76.825458] __sys_sendto+0x8c4/0xac0 [ 76.829274] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 76.834706] ? prepare_exit_to_usermode+0x114/0x420 [ 76.839698] ? syscall_return_slowpath+0x50/0x650 [ 76.844534] __se_sys_sendto+0x107/0x130 [ 76.848583] __x64_sys_sendto+0x6e/0x90 [ 76.852555] do_syscall_64+0xbc/0xf0 [ 76.856249] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 76.861419] RIP: 0033:0x441889 [ 76.864618] 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 bb 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 76.883501] RSP: 002b:00007ffdda6fd468 EFLAGS: 00000216 ORIG_RAX: 000000000000002c [ 76.891192] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000441889 [ 76.898437] RDX: 000000000000000e RSI: 00000000200000c0 RDI: 0000000000000003 [ 76.905695] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 76.912945] R10: 0000000000000000 R11: 0000000000000216 R12: 00007ffdda6fd4c0 [ 76.920197] R13: 00007ffdda6fd4b0 R14: 0000000000000000 R15: 0000000000000000 [ 76.927464] [ 76.929067] Uninit was created at: [ 76.932586] kmsan_internal_poison_shadow+0x92/0x150 [ 76.937667] kmsan_kmalloc+0xa6/0x130 [ 76.941444] kmsan_slab_alloc+0xe/0x10 [ 76.945322] __kmalloc_node_track_caller+0xe18/0x1030 [ 76.950497] __alloc_skb+0x309/0xa20 [ 76.954194] alloc_skb_with_frags+0x1c7/0xac0 [ 76.958670] sock_alloc_send_pskb+0xafd/0x10e0 [ 76.963232] packet_sendmsg+0x661a/0x8f30 [ 76.967361] __sys_sendto+0x8c4/0xac0 [ 76.971146] __se_sys_sendto+0x107/0x130 [ 76.975191] __x64_sys_sendto+0x6e/0x90 [ 76.979147] do_syscall_64+0xbc/0xf0 [ 76.982861] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 76.988024] ================================================================== [ 76.995371] Disabling lock debugging due to kernel taint [ 77.000802] Kernel panic - not syncing: panic_on_warn set ... [ 77.006670] CPU: 0 PID: 10006 Comm: syz-executor469 Tainted: G B 4.20.0-rc7+ #5 [ 77.015397] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.024729] Call Trace: [ 77.027301] dump_stack+0x173/0x1d0 [ 77.030916] panic+0x3ce/0x961 [ 77.034108] kmsan_report+0x293/0x2a0 [ 77.037897] __msan_warning+0x82/0xf0 [ 77.041683] batadv_interface_tx+0x908/0x1e40 [ 77.046165] ? ext4_flex_group_add+0x5141/0xa8d0 [ 77.050904] ? batadv_softif_is_valid+0xb0/0xb0 [ 77.055571] dev_hard_start_xmit+0x607/0xc40 [ 77.060013] __dev_queue_xmit+0x2e42/0x3bc0 [ 77.064331] dev_queue_xmit+0x4b/0x60 [ 77.068128] ? __netdev_pick_tx+0x1270/0x1270 [ 77.072605] packet_sendmsg+0x8306/0x8f30 [ 77.076740] ? rcu_check_callbacks+0x2110/0x2110 [ 77.081479] ? wait_for_completion+0x3e/0x50 [ 77.085869] ? __wait_rcu_gp+0x579/0x5e0 [ 77.089914] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 77.095278] ? compat_packet_setsockopt+0x360/0x360 [ 77.100276] __sys_sendto+0x8c4/0xac0 [ 77.104074] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 77.109596] ? prepare_exit_to_usermode+0x114/0x420 [ 77.114597] ? syscall_return_slowpath+0x50/0x650 [ 77.119422] __se_sys_sendto+0x107/0x130 [ 77.123471] __x64_sys_sendto+0x6e/0x90 [ 77.127427] do_syscall_64+0xbc/0xf0 [ 77.131134] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 77.136305] RIP: 0033:0x441889 [ 77.139478] 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 bb 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 77.158376] RSP: 002b:00007ffdda6fd468 EFLAGS: 00000216 ORIG_RAX: 000000000000002c [ 77.166060] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000441889 [ 77.173307] RDX: 000000000000000e RSI: 00000000200000c0 RDI: 0000000000000003 [ 77.180572] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 77.187820] R10: 0000000000000000 R11: 0000000000000216 R12: 00007ffdda6fd4c0 [ 77.195073] R13: 00007ffdda6fd4b0 R14: 0000000000000000 R15: 0000000000000000 [ 77.203575] Kernel Offset: disabled [ 77.207199] Rebooting in 86400 seconds..