[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 101.591206][ T32] audit: type=1800 audit(1580725293.651:25): pid=10878 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 101.622214][ T32] audit: type=1800 audit(1580725293.681:26): pid=10878 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 101.662179][ T32] audit: type=1800 audit(1580725293.711:27): pid=10878 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 '10.128.0.44' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 113.251217][T11032] ===================================================== [ 113.258357][T11032] BUG: KMSAN: uninit-value in __tipc_nl_compat_dumpit+0x58b/0x1290 [ 113.266263][T11032] CPU: 1 PID: 11032 Comm: syz-executor785 Not tainted 5.5.0-rc5-syzkaller #0 [ 113.275043][T11032] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.285107][T11032] Call Trace: [ 113.288480][T11032] dump_stack+0x1c9/0x220 [ 113.292896][T11032] kmsan_report+0xf7/0x1e0 [ 113.297333][T11032] __msan_warning+0x58/0xa0 [ 113.301976][T11032] __tipc_nl_compat_dumpit+0x58b/0x1290 [ 113.307560][T11032] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.313624][T11032] ? kmsan_get_metadata+0x11d/0x180 [ 113.318871][T11032] ? kmsan_set_origin_checked+0x95/0xf0 [ 113.324433][T11032] ? kmsan_get_metadata+0x11d/0x180 [ 113.331025][T11032] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.336911][T11032] ? __alloc_skb+0x762/0xac0 [ 113.341517][T11032] tipc_nl_compat_dumpit+0x761/0x910 [ 113.346804][T11032] tipc_nl_compat_recv+0x1382/0x2940 [ 113.352092][T11032] ? kmsan_get_metadata+0x4f/0x180 [ 113.357230][T11032] ? __tipc_nl_add_sk_info+0xc80/0xc80 [ 113.362801][T11032] ? tipc_nl_compat_name_table_dump+0xbb0/0xbb0 [ 113.369081][T11032] ? tipc_netlink_compat_stop+0x40/0x40 [ 113.374766][T11032] genl_rcv_msg+0x205e/0x2460 [ 113.379478][T11032] netlink_rcv_skb+0x451/0x650 [ 113.384260][T11032] ? genl_unbind+0x380/0x380 [ 113.388987][T11032] genl_rcv+0x63/0x80 [ 113.392971][T11032] netlink_unicast+0xf9e/0x1100 [ 113.397842][T11032] ? genl_pernet_exit+0x90/0x90 [ 113.402794][T11032] netlink_sendmsg+0x1248/0x14d0 [ 113.407808][T11032] ? netlink_getsockopt+0x1440/0x1440 [ 113.413233][T11032] ____sys_sendmsg+0x12b6/0x1350 [ 113.418183][T11032] __sys_sendmsg+0x451/0x5f0 [ 113.422821][T11032] ? __fpregs_load_activate+0x38c/0x3c0 [ 113.428439][T11032] ? kmsan_get_metadata+0x11d/0x180 [ 113.433644][T11032] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.439469][T11032] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 113.445626][T11032] ? prepare_exit_to_usermode+0x1ca/0x520 [ 113.451337][T11032] __se_sys_sendmsg+0x97/0xb0 [ 113.456007][T11032] __x64_sys_sendmsg+0x4a/0x70 [ 113.460775][T11032] do_syscall_64+0xb8/0x160 [ 113.465422][T11032] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 113.471300][T11032] RIP: 0033:0x445239 [ 113.475182][T11032] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0b cd fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 113.494880][T11032] RSP: 002b:00007ffd14140528 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 113.503279][T11032] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445239 [ 113.511336][T11032] RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 [ 113.519298][T11032] RBP: 00000000006cf018 R08: 0000000000000000 R09: 00000000004002e0 [ 113.527491][T11032] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004023d0 [ 113.535459][T11032] R13: 0000000000402460 R14: 0000000000000000 R15: 0000000000000000 [ 113.543436][T11032] [ 113.545750][T11032] Uninit was created at: [ 113.549993][T11032] kmsan_internal_poison_shadow+0x66/0xd0 [ 113.555730][T11032] kmsan_slab_alloc+0x8a/0xe0 [ 113.560405][T11032] __kmalloc_node_track_caller+0xb40/0x1200 [ 113.566289][T11032] __alloc_skb+0x2fd/0xac0 [ 113.570744][T11032] tipc_nl_compat_dumpit+0x6e4/0x910 [ 113.576017][T11032] tipc_nl_compat_recv+0x1382/0x2940 [ 113.581287][T11032] genl_rcv_msg+0x205e/0x2460 [ 113.585958][T11032] netlink_rcv_skb+0x451/0x650 [ 113.590707][T11032] genl_rcv+0x63/0x80 [ 113.594796][T11032] netlink_unicast+0xf9e/0x1100 [ 113.599633][T11032] netlink_sendmsg+0x1248/0x14d0 [ 113.604556][T11032] ____sys_sendmsg+0x12b6/0x1350 [ 113.609525][T11032] __sys_sendmsg+0x451/0x5f0 [ 113.614111][T11032] __se_sys_sendmsg+0x97/0xb0 [ 113.619123][T11032] __x64_sys_sendmsg+0x4a/0x70 [ 113.623888][T11032] do_syscall_64+0xb8/0x160 [ 113.628418][T11032] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 113.634287][T11032] ===================================================== [ 113.641274][T11032] Disabling lock debugging due to kernel taint [ 113.647432][T11032] Kernel panic - not syncing: panic_on_warn set ... [ 113.654622][T11032] CPU: 1 PID: 11032 Comm: syz-executor785 Tainted: G B 5.5.0-rc5-syzkaller #0 [ 113.664987][T11032] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.675035][T11032] Call Trace: [ 113.678336][T11032] dump_stack+0x1c9/0x220 [ 113.682671][T11032] panic+0x3d5/0xc3e [ 113.686583][T11032] kmsan_report+0x1df/0x1e0 [ 113.691085][T11032] __msan_warning+0x58/0xa0 [ 113.695720][T11032] __tipc_nl_compat_dumpit+0x58b/0x1290 [ 113.701280][T11032] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.707204][T11032] ? kmsan_get_metadata+0x11d/0x180 [ 113.712476][T11032] ? kmsan_set_origin_checked+0x95/0xf0 [ 113.718028][T11032] ? kmsan_get_metadata+0x11d/0x180 [ 113.723233][T11032] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.729041][T11032] ? __alloc_skb+0x762/0xac0 [ 113.733661][T11032] tipc_nl_compat_dumpit+0x761/0x910 [ 113.739068][T11032] tipc_nl_compat_recv+0x1382/0x2940 [ 113.744469][T11032] ? kmsan_get_metadata+0x4f/0x180 [ 113.749574][T11032] ? __tipc_nl_add_sk_info+0xc80/0xc80 [ 113.755122][T11032] ? tipc_nl_compat_name_table_dump+0xbb0/0xbb0 [ 113.761359][T11032] ? tipc_netlink_compat_stop+0x40/0x40 [ 113.766903][T11032] genl_rcv_msg+0x205e/0x2460 [ 113.771601][T11032] netlink_rcv_skb+0x451/0x650 [ 113.776370][T11032] ? genl_unbind+0x380/0x380 [ 113.781169][T11032] genl_rcv+0x63/0x80 [ 113.785415][T11032] netlink_unicast+0xf9e/0x1100 [ 113.790255][T11032] ? genl_pernet_exit+0x90/0x90 [ 113.795094][T11032] netlink_sendmsg+0x1248/0x14d0 [ 113.800155][T11032] ? netlink_getsockopt+0x1440/0x1440 [ 113.805517][T11032] ____sys_sendmsg+0x12b6/0x1350 [ 113.810497][T11032] __sys_sendmsg+0x451/0x5f0 [ 113.815090][T11032] ? __fpregs_load_activate+0x38c/0x3c0 [ 113.820642][T11032] ? kmsan_get_metadata+0x11d/0x180 [ 113.825832][T11032] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.831633][T11032] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 113.837688][T11032] ? prepare_exit_to_usermode+0x1ca/0x520 [ 113.843446][T11032] __se_sys_sendmsg+0x97/0xb0 [ 113.848162][T11032] __x64_sys_sendmsg+0x4a/0x70 [ 113.852917][T11032] do_syscall_64+0xb8/0x160 [ 113.857504][T11032] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 113.863428][T11032] RIP: 0033:0x445239 [ 113.867311][T11032] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0b cd fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 113.886952][T11032] RSP: 002b:00007ffd14140528 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 113.895372][T11032] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445239 [ 113.903332][T11032] RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 [ 113.911295][T11032] RBP: 00000000006cf018 R08: 0000000000000000 R09: 00000000004002e0 [ 113.919254][T11032] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004023d0 [ 113.927332][T11032] R13: 0000000000402460 R14: 0000000000000000 R15: 0000000000000000 [ 113.936862][T11032] Kernel Offset: 0xc200000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 113.948503][T11032] Rebooting in 86400 seconds..