[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.467168] audit: type=1800 audit(1540387482.511:25): pid=6219 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.486359] audit: type=1800 audit(1540387482.511:26): pid=6219 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.505931] audit: type=1800 audit(1540387482.541:27): pid=6219 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 '10.128.0.96' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 73.264081] ================================================================== [ 73.271487] BUG: KMSAN: uninit-value in strlen+0x3b/0xa0 [ 73.276932] CPU: 1 PID: 6371 Comm: syz-executor652 Not tainted 4.19.0-rc8+ #70 [ 73.284288] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.293637] Call Trace: [ 73.296219] dump_stack+0x306/0x460 [ 73.299855] ? _raw_spin_lock_irqsave+0x227/0x340 [ 73.304699] ? strlen+0x3b/0xa0 [ 73.307986] kmsan_report+0x1a2/0x2e0 [ 73.311796] __msan_warning+0x7c/0xe0 [ 73.315619] strlen+0x3b/0xa0 [ 73.318727] tipc_nl_compat_bearer_enable+0x238/0x7b0 [ 73.323926] ? tipc_nl_compat_dumpit+0x820/0x820 [ 73.328680] tipc_nl_compat_doit+0x39f/0xae0 [ 73.333136] tipc_nl_compat_recv+0x147c/0x2760 [ 73.337721] ? INIT_BOOL+0xc/0x30 [ 73.341207] ? tipc_nl_bearer_disable+0xb0/0xb0 [ 73.345880] ? tipc_nl_compat_dumpit+0x820/0x820 [ 73.350637] ? tipc_netlink_compat_stop+0x40/0x40 [ 73.355490] genl_rcv_msg+0x185c/0x1a20 [ 73.359462] ? INIT_INT+0xc/0x30 [ 73.362851] ? kmsan_set_origin+0x83/0x140 [ 73.367099] netlink_rcv_skb+0x394/0x640 [ 73.371159] ? genl_unbind+0x380/0x380 [ 73.375056] genl_rcv+0x63/0x80 [ 73.378339] netlink_unicast+0x166d/0x1720 [ 73.382583] ? genl_pernet_exit+0x90/0x90 [ 73.386744] netlink_sendmsg+0x1391/0x1420 [ 73.391009] ___sys_sendmsg+0xe47/0x1200 [ 73.395078] ? netlink_getsockopt+0x1560/0x1560 [ 73.399765] ? __msan_poison_alloca+0x17a/0x210 [ 73.404448] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 73.409810] ? __fdget+0x22b/0x430 [ 73.413357] __se_sys_sendmsg+0x307/0x460 [ 73.417517] __x64_sys_sendmsg+0x4a/0x70 [ 73.421571] do_syscall_64+0xbe/0x100 [ 73.425371] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 73.430553] RIP: 0033:0x440179 [ 73.433739] 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 [ 73.452636] RSP: 002b:00007fffef7beee8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 73.460337] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440179 [ 73.467601] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 73.474862] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 73.482124] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401a00 [ 73.489384] R13: 0000000000401a90 R14: 0000000000000000 R15: 0000000000000000 [ 73.496670] [ 73.498296] Uninit was created at: [ 73.501855] kmsan_internal_poison_shadow+0xc8/0x1d0 [ 73.506969] kmsan_kmalloc+0xa4/0x120 [ 73.510760] kmsan_slab_alloc+0x10/0x20 [ 73.514733] __kmalloc_node_track_caller+0xb43/0x1400 [ 73.519918] __alloc_skb+0x422/0xe90 [ 73.523627] netlink_sendmsg+0xcaf/0x1420 [ 73.527771] ___sys_sendmsg+0xe47/0x1200 [ 73.531838] __se_sys_sendmsg+0x307/0x460 [ 73.536000] __x64_sys_sendmsg+0x4a/0x70 [ 73.540055] do_syscall_64+0xbe/0x100 [ 73.543854] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 73.549032] ================================================================== [ 73.556378] Disabling lock debugging due to kernel taint [ 73.561829] Kernel panic - not syncing: panic_on_warn set ... [ 73.561829] [ 73.569211] CPU: 1 PID: 6371 Comm: syz-executor652 Tainted: G B 4.19.0-rc8+ #70 [ 73.577950] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.587294] Call Trace: [ 73.589878] dump_stack+0x306/0x460 [ 73.593515] panic+0x54c/0xafa [ 73.596739] kmsan_report+0x2d3/0x2e0 [ 73.600552] __msan_warning+0x7c/0xe0 [ 73.604383] strlen+0x3b/0xa0 [ 73.607502] tipc_nl_compat_bearer_enable+0x238/0x7b0 [ 73.612702] ? tipc_nl_compat_dumpit+0x820/0x820 [ 73.617451] tipc_nl_compat_doit+0x39f/0xae0 [ 73.621909] tipc_nl_compat_recv+0x147c/0x2760 [ 73.626506] ? INIT_BOOL+0xc/0x30 [ 73.629989] ? tipc_nl_bearer_disable+0xb0/0xb0 [ 73.634658] ? tipc_nl_compat_dumpit+0x820/0x820 [ 73.639414] ? tipc_netlink_compat_stop+0x40/0x40 [ 73.644257] genl_rcv_msg+0x185c/0x1a20 [ 73.648237] ? INIT_INT+0xc/0x30 [ 73.651625] ? kmsan_set_origin+0x83/0x140 [ 73.655871] netlink_rcv_skb+0x394/0x640 [ 73.659933] ? genl_unbind+0x380/0x380 [ 73.663829] genl_rcv+0x63/0x80 [ 73.667109] netlink_unicast+0x166d/0x1720 [ 73.671363] ? genl_pernet_exit+0x90/0x90 [ 73.675537] netlink_sendmsg+0x1391/0x1420 [ 73.679791] ___sys_sendmsg+0xe47/0x1200 [ 73.683860] ? netlink_getsockopt+0x1560/0x1560 [ 73.688536] ? __msan_poison_alloca+0x17a/0x210 [ 73.693214] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 73.698575] ? __fdget+0x22b/0x430 [ 73.702125] __se_sys_sendmsg+0x307/0x460 [ 73.706288] __x64_sys_sendmsg+0x4a/0x70 [ 73.710341] do_syscall_64+0xbe/0x100 [ 73.714153] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 73.719368] RIP: 0033:0x440179 [ 73.722561] 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 [ 73.741460] RSP: 002b:00007fffef7beee8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 73.749166] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440179 [ 73.756428] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 73.763692] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 73.770954] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401a00 [ 73.778218] R13: 0000000000401a90 R14: 0000000000000000 R15: 0000000000000000 [ 73.786327] Kernel Offset: disabled [ 73.789969] Rebooting in 86400 seconds..