[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 95.606847][ T32] audit: type=1800 audit(1579610348.650:25): pid=10819 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 95.642233][ T32] audit: type=1800 audit(1579610348.680:26): pid=10819 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 95.662515][ T32] audit: type=1800 audit(1579610348.680:27): pid=10819 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.23' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 110.841789][T10971] IPVS: ftp: loaded support on port[0] = 21 [ 110.894641][T10971] netlink: 4 bytes leftover after parsing attributes in process `syz-executor362'. [ 110.904521][T10971] ===================================================== [ 110.911463][T10971] BUG: KMSAN: uninit-value in string+0x522/0x690 [ 110.917784][T10971] CPU: 0 PID: 10971 Comm: syz-executor362 Not tainted 5.5.0-rc5-syzkaller #0 [ 110.926519][T10971] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 110.936565][T10971] Call Trace: [ 110.939856][T10971] dump_stack+0x1c9/0x220 [ 110.944191][T10971] kmsan_report+0xf7/0x1e0 [ 110.948594][T10971] __msan_warning+0x58/0xa0 [ 110.953108][T10971] string+0x522/0x690 [ 110.957089][T10971] vsnprintf+0x207d/0x31b0 [ 110.961501][T10971] ? kmsan_get_metadata+0x11d/0x180 [ 110.966697][T10971] __request_module+0x2ad/0x11c0 [ 110.971687][T10971] ? netdev_run_todo+0x1533/0x1570 [ 110.976792][T10971] ? kmsan_get_metadata+0x11d/0x180 [ 110.981983][T10971] ? kmsan_set_origin_checked+0x95/0xf0 [ 110.987523][T10971] tcf_proto_lookup_ops+0x241/0x720 [ 110.992771][T10971] tc_new_tfilter+0x2a4e/0x5010 [ 110.997623][T10971] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 111.003689][T10971] ? security_capable+0x1cb/0x220 [ 111.008726][T10971] ? kmsan_get_metadata+0x11d/0x180 [ 111.013923][T10971] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 111.019727][T10971] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 111.025523][T10971] ? tcf_tunnel_encap_put_tunnel+0x40/0x40 [ 111.031367][T10971] rtnetlink_rcv_msg+0xcb7/0x1570 [ 111.036390][T10971] ? do_syscall_64+0xb8/0x160 [ 111.041059][T10971] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 111.046892][T10971] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 111.052957][T10971] ? kmsan_get_metadata+0x11d/0x180 [ 111.058198][T10971] ? kmsan_get_metadata+0x4f/0x180 [ 111.063342][T10971] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 111.069144][T10971] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 111.075198][T10971] ? rhashtable_jhash2+0x3ac/0x4d0 [ 111.080296][T10971] ? kmsan_get_metadata+0x11d/0x180 [ 111.085485][T10971] ? kmsan_get_metadata+0x4f/0x180 [ 111.090581][T10971] ? kmsan_get_metadata+0x4f/0x180 [ 111.095679][T10971] ? kmsan_get_metadata+0x4f/0x180 [ 111.100780][T10971] ? kmsan_set_origin_checked+0x95/0xf0 [ 111.106315][T10971] ? kmsan_get_metadata+0x11d/0x180 [ 111.111589][T10971] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 111.117389][T10971] netlink_rcv_skb+0x451/0x650 [ 111.122148][T10971] ? rtnetlink_bind+0x120/0x120 [ 111.126986][T10971] rtnetlink_rcv+0x50/0x60 [ 111.131390][T10971] netlink_unicast+0xf9e/0x1100 [ 111.136236][T10971] ? rtnetlink_net_exit+0x90/0x90 [ 111.141309][T10971] netlink_sendmsg+0x1248/0x14d0 [ 111.146264][T10971] ? netlink_getsockopt+0x1440/0x1440 [ 111.151625][T10971] ____sys_sendmsg+0x12b6/0x1350 [ 111.156553][T10971] __sys_sendmsg+0x451/0x5f0 [ 111.161150][T10971] ? __fpregs_load_activate+0x38c/0x3c0 [ 111.166692][T10971] ? kmsan_get_metadata+0x11d/0x180 [ 111.171896][T10971] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 111.177707][T10971] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 111.183767][T10971] ? prepare_exit_to_usermode+0x1ca/0x520 [ 111.189498][T10971] __se_sys_sendmsg+0x97/0xb0 [ 111.194175][T10971] __x64_sys_sendmsg+0x4a/0x70 [ 111.198977][T10971] do_syscall_64+0xb8/0x160 [ 111.203654][T10971] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 111.209539][T10971] RIP: 0033:0x440c59 [ 111.213467][T10971] 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 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 111.233063][T10971] RSP: 002b:00007ffd16db4888 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 111.241467][T10971] RAX: ffffffffffffffda RBX: 00000000004a24f0 RCX: 0000000000440c59 [ 111.249431][T10971] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 111.257459][T10971] RBP: 00000000004a24f0 R08: 0000000120080522 R09: 0000000120080522 [ 111.265425][T10971] R10: 0000000120080522 R11: 0000000000000246 R12: 0000000000402160 [ 111.273380][T10971] R13: 00000000004021f0 R14: 0000000000000000 R15: 0000000000000000 [ 111.281350][T10971] [ 111.283660][T10971] Uninit was created at: [ 111.288014][T10971] kmsan_internal_poison_shadow+0x66/0xd0 [ 111.293732][T10971] kmsan_slab_alloc+0x8a/0xe0 [ 111.298390][T10971] __kmalloc_node_track_caller+0xb40/0x1200 [ 111.304273][T10971] __alloc_skb+0x2fd/0xac0 [ 111.308673][T10971] netlink_sendmsg+0x7d3/0x14d0 [ 111.313525][T10971] ____sys_sendmsg+0x12b6/0x1350 [ 111.318440][T10971] __sys_sendmsg+0x451/0x5f0 [ 111.323008][T10971] __se_sys_sendmsg+0x97/0xb0 [ 111.327676][T10971] __x64_sys_sendmsg+0x4a/0x70 [ 111.332468][T10971] do_syscall_64+0xb8/0x160 [ 111.336952][T10971] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 111.342822][T10971] ===================================================== [ 111.349743][T10971] Disabling lock debugging due to kernel taint [ 111.355887][T10971] Kernel panic - not syncing: panic_on_warn set ... [ 111.362464][T10971] CPU: 0 PID: 10971 Comm: syz-executor362 Tainted: G B 5.5.0-rc5-syzkaller #0 [ 111.372592][T10971] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 111.382680][T10971] Call Trace: [ 111.385977][T10971] dump_stack+0x1c9/0x220 [ 111.390298][T10971] panic+0x3d5/0xc3e [ 111.394190][T10971] kmsan_report+0x1df/0x1e0 [ 111.398688][T10971] __msan_warning+0x58/0xa0 [ 111.403184][T10971] string+0x522/0x690 [ 111.407169][T10971] vsnprintf+0x207d/0x31b0 [ 111.411573][T10971] ? kmsan_get_metadata+0x11d/0x180 [ 111.416790][T10971] __request_module+0x2ad/0x11c0 [ 111.421731][T10971] ? netdev_run_todo+0x1533/0x1570 [ 111.426843][T10971] ? kmsan_get_metadata+0x11d/0x180 [ 111.432031][T10971] ? kmsan_set_origin_checked+0x95/0xf0 [ 111.437567][T10971] tcf_proto_lookup_ops+0x241/0x720 [ 111.442772][T10971] tc_new_tfilter+0x2a4e/0x5010 [ 111.447626][T10971] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 111.453691][T10971] ? security_capable+0x1cb/0x220 [ 111.458704][T10971] ? kmsan_get_metadata+0x11d/0x180 [ 111.463897][T10971] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 111.469699][T10971] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 111.475494][T10971] ? tcf_tunnel_encap_put_tunnel+0x40/0x40 [ 111.481300][T10971] rtnetlink_rcv_msg+0xcb7/0x1570 [ 111.486370][T10971] ? do_syscall_64+0xb8/0x160 [ 111.491042][T10971] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 111.496842][T10971] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 111.502901][T10971] ? kmsan_get_metadata+0x11d/0x180 [ 111.508091][T10971] ? kmsan_get_metadata+0x4f/0x180 [ 111.513238][T10971] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 111.519098][T10971] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 111.525156][T10971] ? rhashtable_jhash2+0x3ac/0x4d0 [ 111.530262][T10971] ? kmsan_get_metadata+0x11d/0x180 [ 111.535444][T10971] ? kmsan_get_metadata+0x4f/0x180 [ 111.540548][T10971] ? kmsan_get_metadata+0x4f/0x180 [ 111.545648][T10971] ? kmsan_get_metadata+0x4f/0x180 [ 111.550760][T10971] ? kmsan_set_origin_checked+0x95/0xf0 [ 111.556298][T10971] ? kmsan_get_metadata+0x11d/0x180 [ 111.561480][T10971] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 111.567285][T10971] netlink_rcv_skb+0x451/0x650 [ 111.572045][T10971] ? rtnetlink_bind+0x120/0x120 [ 111.577011][T10971] rtnetlink_rcv+0x50/0x60 [ 111.581475][T10971] netlink_unicast+0xf9e/0x1100 [ 111.586329][T10971] ? rtnetlink_net_exit+0x90/0x90 [ 111.591348][T10971] netlink_sendmsg+0x1248/0x14d0 [ 111.596283][T10971] ? netlink_getsockopt+0x1440/0x1440 [ 111.601645][T10971] ____sys_sendmsg+0x12b6/0x1350 [ 111.606584][T10971] __sys_sendmsg+0x451/0x5f0 [ 111.611182][T10971] ? __fpregs_load_activate+0x38c/0x3c0 [ 111.616739][T10971] ? kmsan_get_metadata+0x11d/0x180 [ 111.621946][T10971] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 111.627753][T10971] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 111.633808][T10971] ? prepare_exit_to_usermode+0x1ca/0x520 [ 111.639519][T10971] __se_sys_sendmsg+0x97/0xb0 [ 111.644230][T10971] __x64_sys_sendmsg+0x4a/0x70 [ 111.648998][T10971] do_syscall_64+0xb8/0x160 [ 111.653510][T10971] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 111.659389][T10971] RIP: 0033:0x440c59 [ 111.663266][T10971] 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 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 111.682863][T10971] RSP: 002b:00007ffd16db4888 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 111.691312][T10971] RAX: ffffffffffffffda RBX: 00000000004a24f0 RCX: 0000000000440c59 [ 111.699279][T10971] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 111.708283][T10971] RBP: 00000000004a24f0 R08: 0000000120080522 R09: 0000000120080522 [ 111.716287][T10971] R10: 0000000120080522 R11: 0000000000000246 R12: 0000000000402160 [ 111.724387][T10971] R13: 00000000004021f0 R14: 0000000000000000 R15: 0000000000000000 [ 111.733673][T10971] Kernel Offset: 0x3a00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 111.745267][T10971] Rebooting in 86400 seconds..