[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 86.570708][ T33] audit: type=1800 audit(1576075445.638:25): pid=12272 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 86.594468][ T33] audit: type=1800 audit(1576075445.658:26): pid=12272 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 86.634210][ T33] audit: type=1800 audit(1576075445.688:27): pid=12272 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 '10.128.10.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 97.029551][T12425] ===================================================== [ 97.036562][T12425] BUG: KMSAN: uninit-value in __tipc_nl_compat_dumpit+0x553/0x11e0 [ 97.044458][T12425] CPU: 0 PID: 12425 Comm: syz-executor062 Not tainted 5.5.0-rc1-syzkaller #0 [ 97.053205][T12425] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.063295][T12425] Call Trace: [ 97.066623][T12425] dump_stack+0x1c9/0x220 [ 97.070943][T12425] kmsan_report+0x128/0x220 [ 97.075436][T12425] __msan_warning+0x57/0xa0 [ 97.079927][T12425] __tipc_nl_compat_dumpit+0x553/0x11e0 [ 97.085462][T12425] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 97.091713][T12425] ? kmsan_get_metadata+0x35/0x290 [ 97.096822][T12425] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 97.102705][T12425] ? __alloc_skb+0x94a/0xa50 [ 97.107316][T12425] tipc_nl_compat_dumpit+0x761/0x910 [ 97.112604][T12425] tipc_nl_compat_recv+0x12e9/0x2870 [ 97.118025][T12425] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 97.124104][T12425] ? tipc_nl_bearer_set+0xb0/0xb0 [ 97.129115][T12425] ? tipc_nl_compat_sk_dump+0xf10/0xf10 [ 97.134644][T12425] ? tipc_netlink_compat_stop+0x40/0x40 [ 97.140194][T12425] genl_rcv_msg+0x1dd0/0x23a0 [ 97.144883][T12425] netlink_rcv_skb+0x431/0x620 [ 97.149630][T12425] ? genl_unbind+0x390/0x390 [ 97.154229][T12425] genl_rcv+0x63/0x80 [ 97.158208][T12425] netlink_unicast+0xfa0/0x1100 [ 97.163092][T12425] ? genl_pernet_exit+0x90/0x90 [ 97.168214][T12425] netlink_sendmsg+0x11f0/0x1480 [ 97.173157][T12425] ? netlink_getsockopt+0x1430/0x1430 [ 97.178516][T12425] ____sys_sendmsg+0x1362/0x13f0 [ 97.183464][T12425] __sys_sendmsg+0x4f0/0x5e0 [ 97.188061][T12425] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 97.193935][T12425] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 97.199986][T12425] ? prepare_exit_to_usermode+0x1ca/0x530 [ 97.205693][T12425] __se_sys_sendmsg+0x97/0xb0 [ 97.211397][T12425] __x64_sys_sendmsg+0x4a/0x70 [ 97.216303][T12425] do_syscall_64+0xb6/0x160 [ 97.220929][T12425] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 97.226919][T12425] RIP: 0033:0x444179 [ 97.230801][T12425] 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 1b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 97.250540][T12425] RSP: 002b:00007ffd2d6409c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 97.258944][T12425] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444179 [ 97.267105][T12425] RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003 [ 97.275083][T12425] RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002e0 [ 97.283177][T12425] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401e20 [ 97.291198][T12425] R13: 0000000000401eb0 R14: 0000000000000000 R15: 0000000000000000 [ 97.299254][T12425] [ 97.301566][T12425] Uninit was created at: [ 97.306212][T12425] kmsan_internal_poison_shadow+0x5c/0x110 [ 97.312500][T12425] kmsan_slab_alloc+0x8a/0xe0 [ 97.317188][T12425] __kmalloc_node_track_caller+0xe47/0x11f0 [ 97.323081][T12425] __alloc_skb+0x309/0xa50 [ 97.327499][T12425] tipc_nl_compat_dumpit+0x6e4/0x910 [ 97.332764][T12425] tipc_nl_compat_recv+0x12e9/0x2870 [ 97.338047][T12425] genl_rcv_msg+0x1dd0/0x23a0 [ 97.342712][T12425] netlink_rcv_skb+0x431/0x620 [ 97.347463][T12425] genl_rcv+0x63/0x80 [ 97.351558][T12425] netlink_unicast+0xfa0/0x1100 [ 97.356400][T12425] netlink_sendmsg+0x11f0/0x1480 [ 97.361397][T12425] ____sys_sendmsg+0x1362/0x13f0 [ 97.366322][T12425] __sys_sendmsg+0x4f0/0x5e0 [ 97.371070][T12425] __se_sys_sendmsg+0x97/0xb0 [ 97.375741][T12425] __x64_sys_sendmsg+0x4a/0x70 [ 97.380732][T12425] do_syscall_64+0xb6/0x160 [ 97.385617][T12425] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 97.391521][T12425] ===================================================== [ 97.398495][T12425] Disabling lock debugging due to kernel taint [ 97.404733][T12425] Kernel panic - not syncing: panic_on_warn set ... [ 97.411312][T12425] CPU: 0 PID: 12425 Comm: syz-executor062 Tainted: G B 5.5.0-rc1-syzkaller #0 [ 97.421437][T12425] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.432190][T12425] Call Trace: [ 97.435579][T12425] dump_stack+0x1c9/0x220 [ 97.439989][T12425] panic+0x3c9/0xc1e [ 97.444074][T12425] kmsan_report+0x215/0x220 [ 97.448581][T12425] __msan_warning+0x57/0xa0 [ 97.453099][T12425] __tipc_nl_compat_dumpit+0x553/0x11e0 [ 97.458630][T12425] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 97.464680][T12425] ? kmsan_get_metadata+0x35/0x290 [ 97.469790][T12425] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 97.476552][T12425] ? __alloc_skb+0x94a/0xa50 [ 97.481133][T12425] tipc_nl_compat_dumpit+0x761/0x910 [ 97.486417][T12425] tipc_nl_compat_recv+0x12e9/0x2870 [ 97.491684][T12425] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 97.497587][T12425] ? tipc_nl_bearer_set+0xb0/0xb0 [ 97.502592][T12425] ? tipc_nl_compat_sk_dump+0xf10/0xf10 [ 97.508158][T12425] ? tipc_netlink_compat_stop+0x40/0x40 [ 97.513702][T12425] genl_rcv_msg+0x1dd0/0x23a0 [ 97.518395][T12425] netlink_rcv_skb+0x431/0x620 [ 97.523151][T12425] ? genl_unbind+0x390/0x390 [ 97.527730][T12425] genl_rcv+0x63/0x80 [ 97.531696][T12425] netlink_unicast+0xfa0/0x1100 [ 97.536533][T12425] ? genl_pernet_exit+0x90/0x90 [ 97.541366][T12425] netlink_sendmsg+0x11f0/0x1480 [ 97.546296][T12425] ? netlink_getsockopt+0x1430/0x1430 [ 97.551751][T12425] ____sys_sendmsg+0x1362/0x13f0 [ 97.556835][T12425] __sys_sendmsg+0x4f0/0x5e0 [ 97.561553][T12425] ? kmsan_get_shadow_origin_ptr+0x91/0x4d0 [ 97.567624][T12425] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 97.573685][T12425] ? prepare_exit_to_usermode+0x1ca/0x530 [ 97.579398][T12425] __se_sys_sendmsg+0x97/0xb0 [ 97.584362][T12425] __x64_sys_sendmsg+0x4a/0x70 [ 97.589112][T12425] do_syscall_64+0xb6/0x160 [ 97.593742][T12425] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 97.599895][T12425] RIP: 0033:0x444179 [ 97.603792][T12425] 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 1b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 97.626522][T12425] RSP: 002b:00007ffd2d6409c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 97.635053][T12425] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444179 [ 97.643036][T12425] RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003 [ 97.651005][T12425] RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002e0 [ 97.658969][T12425] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401e20 [ 97.666930][T12425] R13: 0000000000401eb0 R14: 0000000000000000 R15: 0000000000000000 [ 97.676700][T12425] Kernel Offset: 0x11e00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 97.689102][T12425] Rebooting in 86400 seconds..