[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 95.120517] audit: type=1800 audit(1552628217.176:25): pid=10376 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 95.139771] audit: type=1800 audit(1552628217.186:26): pid=10376 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 95.159228] audit: type=1800 audit(1552628217.206:27): pid=10376 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 '10.128.15.215' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 122.923399] ================================================================== [ 122.930848] BUG: KMSAN: uninit-value in memchr+0xce/0x110 [ 122.936388] CPU: 0 PID: 10526 Comm: syz-executor961 Not tainted 5.0.0+ #13 [ 122.943390] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 122.952732] Call Trace: [ 122.955317] dump_stack+0x173/0x1d0 [ 122.959810] kmsan_report+0x12e/0x2a0 [ 122.963629] __msan_warning+0x82/0xf0 [ 122.967445] memchr+0xce/0x110 [ 122.970638] tipc_nl_compat_bearer_enable+0x2c4/0x910 [ 122.975837] ? tipc_nl_compat_dumpit+0x820/0x820 [ 122.980583] tipc_nl_compat_doit+0x3aa/0xaf0 [ 122.984981] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 122.990189] tipc_nl_compat_recv+0x1ae7/0x2750 [ 122.994780] ? tipc_nl_bearer_disable+0xb0/0xb0 [ 122.999490] ? tipc_nl_compat_dumpit+0x820/0x820 [ 123.004255] ? tipc_netlink_compat_stop+0x40/0x40 [ 123.009102] genl_rcv_msg+0x185f/0x1a60 [ 123.013101] ? kmsan_internal_memset_shadow+0x14c/0x430 [ 123.018466] netlink_rcv_skb+0x431/0x620 [ 123.022515] ? genl_unbind+0x390/0x390 [ 123.026541] genl_rcv+0x63/0x80 [ 123.029817] netlink_unicast+0xf3e/0x1020 [ 123.033981] netlink_sendmsg+0x127f/0x1300 [ 123.038229] ___sys_sendmsg+0xdb9/0x11b0 [ 123.042341] ? netlink_getsockopt+0x1460/0x1460 [ 123.047104] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 123.052348] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 123.057703] ? __fget_light+0x1fe/0x750 [ 123.061694] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 123.066937] __se_sys_sendmsg+0x305/0x460 [ 123.071102] __x64_sys_sendmsg+0x4a/0x70 [ 123.075227] do_syscall_64+0xbc/0xf0 [ 123.078939] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 123.084117] RIP: 0033:0x440209 [ 123.087297] 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 123.106246] RSP: 002b:00007ffc77bfd0a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 123.113953] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440209 [ 123.121206] RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003 [ 123.128557] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 123.135823] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a90 [ 123.143084] R13: 0000000000401b20 R14: 0000000000000000 R15: 0000000000000000 [ 123.150358] [ 123.151967] Uninit was created at: [ 123.155498] kmsan_internal_poison_shadow+0x92/0x150 [ 123.160585] kmsan_kmalloc+0xa6/0x130 [ 123.164373] kmsan_slab_alloc+0xe/0x10 [ 123.168261] __kmalloc_node_track_caller+0xe9e/0xff0 [ 123.173363] __alloc_skb+0x309/0xa20 [ 123.177067] netlink_sendmsg+0xb82/0x1300 [ 123.181205] ___sys_sendmsg+0xdb9/0x11b0 [ 123.185258] __se_sys_sendmsg+0x305/0x460 [ 123.189389] __x64_sys_sendmsg+0x4a/0x70 [ 123.193436] do_syscall_64+0xbc/0xf0 [ 123.197137] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 123.202305] ================================================================== [ 123.209641] Disabling lock debugging due to kernel taint [ 123.215075] Kernel panic - not syncing: panic_on_warn set ... [ 123.220949] CPU: 0 PID: 10526 Comm: syz-executor961 Tainted: G B 5.0.0+ #13 [ 123.229486] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 123.238836] Call Trace: [ 123.241427] dump_stack+0x173/0x1d0 [ 123.245100] panic+0x3d1/0xb01 [ 123.248324] kmsan_report+0x293/0x2a0 [ 123.252130] __msan_warning+0x82/0xf0 [ 123.256025] memchr+0xce/0x110 [ 123.259230] tipc_nl_compat_bearer_enable+0x2c4/0x910 [ 123.264430] ? tipc_nl_compat_dumpit+0x820/0x820 [ 123.269183] tipc_nl_compat_doit+0x3aa/0xaf0 [ 123.273592] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 123.278803] tipc_nl_compat_recv+0x1ae7/0x2750 [ 123.283403] ? tipc_nl_bearer_disable+0xb0/0xb0 [ 123.288069] ? tipc_nl_compat_dumpit+0x820/0x820 [ 123.292835] ? tipc_netlink_compat_stop+0x40/0x40 [ 123.297671] genl_rcv_msg+0x185f/0x1a60 [ 123.301694] ? kmsan_internal_memset_shadow+0x14c/0x430 [ 123.307132] netlink_rcv_skb+0x431/0x620 [ 123.311198] ? genl_unbind+0x390/0x390 [ 123.315088] genl_rcv+0x63/0x80 [ 123.318398] netlink_unicast+0xf3e/0x1020 [ 123.322565] netlink_sendmsg+0x127f/0x1300 [ 123.326824] ___sys_sendmsg+0xdb9/0x11b0 [ 123.330886] ? netlink_getsockopt+0x1460/0x1460 [ 123.335557] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 123.340742] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 123.346097] ? __fget_light+0x1fe/0x750 [ 123.350072] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 123.355267] __se_sys_sendmsg+0x305/0x460 [ 123.359428] __x64_sys_sendmsg+0x4a/0x70 [ 123.363482] do_syscall_64+0xbc/0xf0 [ 123.367503] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 123.372694] RIP: 0033:0x440209 [ 123.375877] 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 123.394779] RSP: 002b:00007ffc77bfd0a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 123.402567] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440209 [ 123.409835] RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003 [ 123.417105] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 123.424362] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a90 [ 123.431628] R13: 0000000000401b20 R14: 0000000000000000 R15: 0000000000000000 [ 123.439751] Kernel Offset: disabled [ 123.443380] Rebooting in 86400 seconds..