[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.214632] audit: type=1800 audit(1540326294.271:25): pid=6139 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.234195] audit: type=1800 audit(1540326294.271:26): pid=6139 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.254010] audit: type=1800 audit(1540326294.301:27): pid=6139 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 '10.128.10.5' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 69.806312] ================================================================== [ 69.813737] BUG: KMSAN: uninit-value in tipc_nl_compat_name_table_dump+0x4a8/0xba0 [ 69.821447] CPU: 0 PID: 6290 Comm: syz-executor848 Not tainted 4.19.0-rc8+ #70 [ 69.828804] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.838149] Call Trace: [ 69.840748] dump_stack+0x306/0x460 [ 69.844374] ? tipc_nl_compat_name_table_dump+0x4a8/0xba0 [ 69.849920] kmsan_report+0x1a2/0x2e0 [ 69.853733] __msan_warning+0x7c/0xe0 [ 69.857536] tipc_nl_compat_name_table_dump+0x4a8/0xba0 [ 69.862909] ? tipc_nlmsg_parse+0x206/0x230 [ 69.867230] ? tipc_nl_compat_name_table_dump_header+0x1f0/0x1f0 [ 69.873378] __tipc_nl_compat_dumpit+0x59e/0xdb0 [ 69.878160] tipc_nl_compat_dumpit+0x63a/0x820 [ 69.882754] tipc_nl_compat_recv+0x1402/0x2760 [ 69.887345] ? INIT_BOOL+0xc/0x30 [ 69.890809] ? tipc_nl_compat_link_reset_stats+0x370/0x370 [ 69.896430] ? tipc_nametbl_stop+0x1040/0x1040 [ 69.901010] ? tipc_nl_compat_name_table_dump_header+0x1f0/0x1f0 [ 69.907158] ? tipc_netlink_compat_stop+0x40/0x40 [ 69.912001] genl_rcv_msg+0x185c/0x1a20 [ 69.915976] ? INIT_INT+0xc/0x30 [ 69.919362] ? kmsan_set_origin+0x83/0x140 [ 69.923604] netlink_rcv_skb+0x394/0x640 [ 69.927673] ? genl_unbind+0x380/0x380 [ 69.931582] genl_rcv+0x63/0x80 [ 69.934879] netlink_unicast+0x166d/0x1720 [ 69.939121] ? genl_pernet_exit+0x90/0x90 [ 69.943279] netlink_sendmsg+0x1391/0x1420 [ 69.947543] ___sys_sendmsg+0xe47/0x1200 [ 69.951616] ? netlink_getsockopt+0x1560/0x1560 [ 69.956311] ? __msan_poison_alloca+0x17a/0x210 [ 69.960988] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 69.966352] ? __fdget+0x22b/0x430 [ 69.969899] __se_sys_sendmsg+0x307/0x460 [ 69.974105] __x64_sys_sendmsg+0x4a/0x70 [ 69.978213] do_syscall_64+0xbe/0x100 [ 69.982022] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 69.987204] RIP: 0033:0x440179 [ 69.990390] 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 [ 70.009288] RSP: 002b:00007ffecec49318 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 70.016997] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440179 [ 70.024260] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 70.031524] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 70.038785] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401a00 [ 70.046055] R13: 0000000000401a90 R14: 0000000000000000 R15: 0000000000000000 [ 70.053332] [ 70.054948] Uninit was created at: [ 70.058485] kmsan_internal_poison_shadow+0xc8/0x1d0 [ 70.063580] kmsan_kmalloc+0xa4/0x120 [ 70.067387] kmsan_slab_alloc+0x10/0x20 [ 70.071355] __kmalloc_node_track_caller+0xb43/0x1400 [ 70.076537] __alloc_skb+0x422/0xe90 [ 70.080246] netlink_sendmsg+0xcaf/0x1420 [ 70.084389] ___sys_sendmsg+0xe47/0x1200 [ 70.088453] __se_sys_sendmsg+0x307/0x460 [ 70.092601] __x64_sys_sendmsg+0x4a/0x70 [ 70.096653] do_syscall_64+0xbe/0x100 [ 70.100453] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 70.105627] ================================================================== [ 70.112974] Disabling lock debugging due to kernel taint [ 70.118435] Kernel panic - not syncing: panic_on_warn set ... [ 70.118435] [ 70.125802] CPU: 0 PID: 6290 Comm: syz-executor848 Tainted: G B 4.19.0-rc8+ #70 [ 70.134539] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.143888] Call Trace: [ 70.146476] dump_stack+0x306/0x460 [ 70.150128] panic+0x54c/0xafa [ 70.153347] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 70.158806] kmsan_report+0x2d3/0x2e0 [ 70.162610] __msan_warning+0x7c/0xe0 [ 70.166417] tipc_nl_compat_name_table_dump+0x4a8/0xba0 [ 70.171808] ? tipc_nlmsg_parse+0x206/0x230 [ 70.176138] ? tipc_nl_compat_name_table_dump_header+0x1f0/0x1f0 [ 70.182282] __tipc_nl_compat_dumpit+0x59e/0xdb0 [ 70.187065] tipc_nl_compat_dumpit+0x63a/0x820 [ 70.191674] tipc_nl_compat_recv+0x1402/0x2760 [ 70.196280] ? INIT_BOOL+0xc/0x30 [ 70.199741] ? tipc_nl_compat_link_reset_stats+0x370/0x370 [ 70.205362] ? tipc_nametbl_stop+0x1040/0x1040 [ 70.209941] ? tipc_nl_compat_name_table_dump_header+0x1f0/0x1f0 [ 70.216085] ? tipc_netlink_compat_stop+0x40/0x40 [ 70.220926] genl_rcv_msg+0x185c/0x1a20 [ 70.224915] ? INIT_INT+0xc/0x30 [ 70.228301] ? kmsan_set_origin+0x83/0x140 [ 70.232558] netlink_rcv_skb+0x394/0x640 [ 70.236619] ? genl_unbind+0x380/0x380 [ 70.240512] genl_rcv+0x63/0x80 [ 70.243790] netlink_unicast+0x166d/0x1720 [ 70.248043] ? genl_pernet_exit+0x90/0x90 [ 70.252205] netlink_sendmsg+0x1391/0x1420 [ 70.256459] ___sys_sendmsg+0xe47/0x1200 [ 70.260521] ? netlink_getsockopt+0x1560/0x1560 [ 70.265200] ? __msan_poison_alloca+0x17a/0x210 [ 70.269873] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 70.275235] ? __fdget+0x22b/0x430 [ 70.278787] __se_sys_sendmsg+0x307/0x460 [ 70.282954] __x64_sys_sendmsg+0x4a/0x70 [ 70.287018] do_syscall_64+0xbe/0x100 [ 70.290829] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 70.296016] RIP: 0033:0x440179 [ 70.299202] 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 [ 70.318104] RSP: 002b:00007ffecec49318 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 70.325820] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440179 [ 70.333084] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 70.340344] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 70.347606] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401a00 [ 70.354867] R13: 0000000000401a90 R14: 0000000000000000 R15: 0000000000000000 [ 70.363070] Kernel Offset: disabled [ 70.366715] Rebooting in 86400 seconds..