[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 92.509717] audit: type=1800 audit(1552539843.552:25): pid=10388 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 92.528879] audit: type=1800 audit(1552539843.562:26): pid=10388 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 92.548311] audit: type=1800 audit(1552539843.572:27): pid=10388 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 '10.128.0.31' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 102.866583] ================================================================== [ 102.873987] BUG: KMSAN: uninit-value in memchr+0xce/0x110 [ 102.879515] CPU: 1 PID: 10538 Comm: syz-executor101 Not tainted 5.0.0+ #12 [ 102.886511] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.903251] Call Trace: [ 102.905839] dump_stack+0x173/0x1d0 [ 102.909469] kmsan_report+0x12e/0x2a0 [ 102.913425] __msan_warning+0x82/0xf0 [ 102.917383] memchr+0xce/0x110 [ 102.920599] tipc_nl_compat_link_set+0x121/0x1550 [ 102.925443] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 102.930638] ? tipc_nl_compat_link_dump+0x5f0/0x5f0 [ 102.935648] tipc_nl_compat_doit+0x3aa/0xaf0 [ 102.940048] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 102.945255] tipc_nl_compat_recv+0x1ae7/0x2750 [ 102.949846] ? tipc_nl_node_dump+0x1300/0x1300 [ 102.954446] ? tipc_nl_compat_link_dump+0x5f0/0x5f0 [ 102.959487] ? tipc_netlink_compat_stop+0x40/0x40 [ 102.964325] genl_rcv_msg+0x185f/0x1a60 [ 102.968319] ? kmsan_internal_memset_shadow+0x14c/0x430 [ 102.973684] netlink_rcv_skb+0x431/0x620 [ 102.977739] ? genl_unbind+0x390/0x390 [ 102.981630] genl_rcv+0x63/0x80 [ 102.984905] netlink_unicast+0xf3e/0x1020 [ 102.989074] netlink_sendmsg+0x127f/0x1300 [ 102.993441] ___sys_sendmsg+0xdb9/0x11b0 [ 102.997510] ? netlink_getsockopt+0x1460/0x1460 [ 103.002184] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 103.007367] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 103.012724] ? __fget_light+0x1fe/0x750 [ 103.016701] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 103.021909] __se_sys_sendmsg+0x305/0x460 [ 103.026076] __x64_sys_sendmsg+0x4a/0x70 [ 103.030134] do_syscall_64+0xbc/0xf0 [ 103.033844] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 103.039024] RIP: 0033:0x440259 [ 103.042209] 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 [ 103.061101] RSP: 002b:00007ffcb435a248 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 103.068799] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440259 [ 103.076057] RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003 [ 103.083328] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 103.090583] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ae0 [ 103.097870] R13: 0000000000401b70 R14: 0000000000000000 R15: 0000000000000000 [ 103.105156] [ 103.106789] Uninit was created at: [ 103.110335] kmsan_internal_poison_shadow+0x92/0x150 [ 103.115441] kmsan_kmalloc+0xa6/0x130 [ 103.119229] kmsan_slab_alloc+0xe/0x10 [ 103.123107] __kmalloc_node_track_caller+0xe9e/0xff0 [ 103.128199] __alloc_skb+0x309/0xa20 [ 103.131913] netlink_sendmsg+0xb82/0x1300 [ 103.136073] ___sys_sendmsg+0xdb9/0x11b0 [ 103.140123] __se_sys_sendmsg+0x305/0x460 [ 103.144272] __x64_sys_sendmsg+0x4a/0x70 [ 103.148320] do_syscall_64+0xbc/0xf0 [ 103.152027] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 103.157194] ================================================================== [ 103.164539] Disabling lock debugging due to kernel taint [ 103.169995] Kernel panic - not syncing: panic_on_warn set ... [ 103.175872] CPU: 1 PID: 10538 Comm: syz-executor101 Tainted: G B 5.0.0+ #12 [ 103.184254] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.193595] Call Trace: [ 103.196183] dump_stack+0x173/0x1d0 [ 103.199810] panic+0x3d1/0xb01 [ 103.203028] kmsan_report+0x293/0x2a0 [ 103.206829] __msan_warning+0x82/0xf0 [ 103.210662] memchr+0xce/0x110 [ 103.213873] tipc_nl_compat_link_set+0x121/0x1550 [ 103.218710] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 103.223906] ? tipc_nl_compat_link_dump+0x5f0/0x5f0 [ 103.228917] tipc_nl_compat_doit+0x3aa/0xaf0 [ 103.233320] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 103.238527] tipc_nl_compat_recv+0x1ae7/0x2750 [ 103.243140] ? tipc_nl_node_dump+0x1300/0x1300 [ 103.247714] ? tipc_nl_compat_link_dump+0x5f0/0x5f0 [ 103.252727] ? tipc_netlink_compat_stop+0x40/0x40 [ 103.257561] genl_rcv_msg+0x185f/0x1a60 [ 103.261569] ? kmsan_internal_memset_shadow+0x14c/0x430 [ 103.266941] netlink_rcv_skb+0x431/0x620 [ 103.270993] ? genl_unbind+0x390/0x390 [ 103.274903] genl_rcv+0x63/0x80 [ 103.278183] netlink_unicast+0xf3e/0x1020 [ 103.282346] netlink_sendmsg+0x127f/0x1300 [ 103.286599] ___sys_sendmsg+0xdb9/0x11b0 [ 103.290675] ? netlink_getsockopt+0x1460/0x1460 [ 103.295347] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 103.300535] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 103.305915] ? __fget_light+0x1fe/0x750 [ 103.309898] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 103.315087] __se_sys_sendmsg+0x305/0x460 [ 103.319248] __x64_sys_sendmsg+0x4a/0x70 [ 103.323302] do_syscall_64+0xbc/0xf0 [ 103.327012] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 103.332191] RIP: 0033:0x440259 [ 103.335373] 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 [ 103.354276] RSP: 002b:00007ffcb435a248 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 103.361975] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440259 [ 103.369236] RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003 [ 103.376494] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 103.383766] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ae0 [ 103.391021] R13: 0000000000401b70 R14: 0000000000000000 R15: 0000000000000000 [ 103.399110] Kernel Offset: disabled [ 103.402741] Rebooting in 86400 seconds..