[ 52.258692] audit: type=1800 audit(1545182808.318:25): pid=6362 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 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. [ 53.799757] kauditd_printk_skb: 3 callbacks suppressed [ 53.799788] audit: type=1800 audit(1545182809.858:29): pid=6362 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 53.824611] audit: type=1800 audit(1545182809.868:30): pid=6362 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.69' (ECDSA) to the list of known hosts. 2018/12/19 01:27:03 parsed 1 programs 2018/12/19 01:27:09 executed programs: 0 syzkaller login: [ 73.468838] IPVS: ftp: loaded support on port[0] = 21 [ 73.926754] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.933284] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.940873] device bridge_slave_0 entered promiscuous mode [ 73.972188] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.978642] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.986648] device bridge_slave_1 entered promiscuous mode [ 74.017300] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 74.047705] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 74.138295] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 74.172095] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 74.313529] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 74.321510] team0: Port device team_slave_0 added [ 74.352109] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 74.360013] team0: Port device team_slave_1 added [ 74.390682] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.425075] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.459766] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.495879] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.794100] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.800766] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.808011] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.814691] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.823502] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 75.842848] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 75.882656] 8021q: adding VLAN 0 to HW filter on device bond0 [ 75.984091] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 76.086100] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 76.092439] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 76.100442] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 76.202167] 8021q: adding VLAN 0 to HW filter on device team0 [ 76.871843] ================================================================== [ 76.879244] BUG: KMSAN: uninit-value in check_6rd+0x65a/0x710 [ 76.885123] CPU: 1 PID: 6781 Comm: syz-executor0 Not tainted 4.20.0-rc7+ #3 [ 76.892210] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.901556] Call Trace: [ 76.904146] dump_stack+0x1c9/0x220 [ 76.907776] kmsan_report+0x12d/0x290 [ 76.911588] __msan_warning+0x76/0xc0 [ 76.915421] check_6rd+0x65a/0x710 [ 76.919006] sit_tunnel_xmit+0xb58/0x34d0 [ 76.923181] ? dev_hard_start_xmit+0xb3/0xc80 [ 76.927680] ? __dev_queue_xmit+0x3173/0x3cf0 [ 76.932172] ? ipip6_tunnel_uninit+0x800/0x800 [ 76.936755] dev_hard_start_xmit+0x627/0xc80 [ 76.941204] __dev_queue_xmit+0x3173/0x3cf0 [ 76.945573] dev_queue_xmit+0x4b/0x60 [ 76.949372] ? __netdev_pick_tx+0x1290/0x1290 [ 76.953873] packet_sendmsg+0x7cbd/0x9200 [ 76.958042] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 76.963486] ? rw_copy_check_uvector+0x149/0x6b0 [ 76.968232] ? __msan_poison_alloca+0x1e0/0x270 [ 76.972902] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 76.978257] ? aa_sk_perm+0x7ab/0x9e0 [ 76.982101] ___sys_sendmsg+0xdbc/0x11d0 [ 76.986164] ? compat_packet_setsockopt+0x360/0x360 [ 76.991184] ? __fget_light+0x60/0x780 [ 76.995099] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 77.000475] ? __fget_light+0x20e/0x780 [ 77.004491] __se_sys_sendmsg+0x305/0x460 [ 77.008650] __x64_sys_sendmsg+0x4a/0x70 [ 77.012717] do_syscall_64+0xcd/0x110 [ 77.016513] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 77.021702] RIP: 0033:0x457669 [ 77.024891] Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 77.043780] RSP: 002b:00007ffee2eabce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 77.051487] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457669 [ 77.058770] RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003 [ 77.066055] RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 [ 77.073350] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000027df914 [ 77.080637] R13: 00000000004c443a R14: 00000000004d7410 R15: 00000000ffffffff [ 77.088064] [ 77.089684] Uninit was created at: [ 77.093221] kmsan_internal_poison_shadow+0x92/0x150 [ 77.098313] kmsan_kmalloc+0xa1/0x100 [ 77.102104] kmsan_slab_alloc+0xe/0x10 [ 77.106000] __kmalloc_node_track_caller+0xf06/0x1120 [ 77.111195] __alloc_skb+0x318/0xa40 [ 77.114902] alloc_skb_with_frags+0x1c9/0xa80 [ 77.119384] sock_alloc_send_pskb+0xb5d/0x1140 [ 77.123960] packet_sendmsg+0x66a2/0x9200 [ 77.128107] ___sys_sendmsg+0xdbc/0x11d0 [ 77.132166] __se_sys_sendmsg+0x305/0x460 [ 77.136339] __x64_sys_sendmsg+0x4a/0x70 [ 77.140402] do_syscall_64+0xcd/0x110 [ 77.144195] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 77.149378] ================================================================== [ 77.156724] Disabling lock debugging due to kernel taint [ 77.162157] Kernel panic - not syncing: panic_on_warn set ... [ 77.168033] CPU: 1 PID: 6781 Comm: syz-executor0 Tainted: G B 4.20.0-rc7+ #3 [ 77.176525] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.185896] Call Trace: [ 77.188496] dump_stack+0x1c9/0x220 [ 77.192122] panic+0x3f0/0x98f [ 77.195344] kmsan_report+0x290/0x290 [ 77.199146] __msan_warning+0x76/0xc0 [ 77.202950] check_6rd+0x65a/0x710 [ 77.206525] sit_tunnel_xmit+0xb58/0x34d0 [ 77.210722] ? dev_hard_start_xmit+0xb3/0xc80 [ 77.215218] ? __dev_queue_xmit+0x3173/0x3cf0 [ 77.219711] ? ipip6_tunnel_uninit+0x800/0x800 [ 77.224284] dev_hard_start_xmit+0x627/0xc80 [ 77.228721] __dev_queue_xmit+0x3173/0x3cf0 [ 77.233086] dev_queue_xmit+0x4b/0x60 [ 77.236886] ? __netdev_pick_tx+0x1290/0x1290 [ 77.241370] packet_sendmsg+0x7cbd/0x9200 [ 77.245537] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 77.250982] ? rw_copy_check_uvector+0x149/0x6b0 [ 77.255731] ? __msan_poison_alloca+0x1e0/0x270 [ 77.260409] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 77.265766] ? aa_sk_perm+0x7ab/0x9e0 [ 77.269607] ___sys_sendmsg+0xdbc/0x11d0 [ 77.273678] ? compat_packet_setsockopt+0x360/0x360 [ 77.278707] ? __fget_light+0x60/0x780 [ 77.282596] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 77.287949] ? __fget_light+0x20e/0x780 [ 77.291941] __se_sys_sendmsg+0x305/0x460 [ 77.296105] __x64_sys_sendmsg+0x4a/0x70 [ 77.300160] do_syscall_64+0xcd/0x110 [ 77.303959] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 77.309137] RIP: 0033:0x457669 [ 77.312334] Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 77.331241] RSP: 002b:00007ffee2eabce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 77.338937] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457669 [ 77.346203] RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003 [ 77.353465] RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 [ 77.360732] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000027df914 [ 77.367994] R13: 00000000004c443a R14: 00000000004d7410 R15: 00000000ffffffff [ 77.376247] Kernel Offset: disabled [ 77.379877] Rebooting in 86400 seconds..