[ 99.759819] audit: type=1800 audit(1556282209.803:25): pid=10499 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 99.784361] audit: type=1800 audit(1556282209.833:26): pid=10499 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 99.834724] audit: type=1800 audit(1556282209.853:27): pid=10499 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. [ 101.227036] sshd (10567) used greatest stack depth: 54128 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.12' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 112.436308] ================================================================== [ 112.443713] BUG: KMSAN: uninit-value in memchr+0xce/0x110 [ 112.449263] CPU: 0 PID: 10649 Comm: syz-executor697 Not tainted 5.1.0-rc4+ #1 [ 112.456520] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 112.465859] Call Trace: [ 112.468441] dump_stack+0x173/0x1d0 [ 112.472100] kmsan_report+0x131/0x2a0 [ 112.475913] __msan_warning+0x7a/0xf0 [ 112.479710] memchr+0xce/0x110 [ 112.482908] tipc_nl_compat_link_reset_stats+0x27f/0x460 [ 112.488374] ? tipc_nl_compat_link_set+0x1590/0x1590 [ 112.493471] tipc_nl_compat_doit+0x3aa/0xaf0 [ 112.497906] tipc_nl_compat_recv+0x1b60/0x27e0 [ 112.502493] ? tipc_nl_node_get_link+0x920/0x920 [ 112.507237] ? tipc_nl_compat_link_set+0x1590/0x1590 [ 112.512338] ? tipc_netlink_compat_stop+0x40/0x40 [ 112.517174] genl_rcv_msg+0x185f/0x1a60 [ 112.521166] ? kmsan_internal_memset_shadow+0x104/0x3a0 [ 112.526534] netlink_rcv_skb+0x431/0x620 [ 112.530589] ? genl_unbind+0x390/0x390 [ 112.534483] genl_rcv+0x63/0x80 [ 112.537771] netlink_unicast+0xf3e/0x1020 [ 112.541959] netlink_sendmsg+0x127f/0x1300 [ 112.546218] ___sys_sendmsg+0xdb3/0x1220 [ 112.550314] ? netlink_getsockopt+0x1460/0x1460 [ 112.555013] ? __fget_light+0x60/0x750 [ 112.558890] ? __fdget+0x4e/0x60 [ 112.562258] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 112.567612] ? __fget_light+0x1fe/0x750 [ 112.571594] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.576788] __se_sys_sendmsg+0x305/0x460 [ 112.581000] __x64_sys_sendmsg+0x4a/0x70 [ 112.585090] do_syscall_64+0xbc/0xf0 [ 112.588809] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 112.593985] RIP: 0033:0x444199 [ 112.597166] 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 [ 112.616074] RSP: 002b:00007fffae6ba2d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 112.623768] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444199 [ 112.631043] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000003 [ 112.638308] RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002e0 [ 112.645567] R10: 0000000000001400 R11: 0000000000000246 R12: 0000000000401e40 [ 112.657346] R13: 0000000000401ed0 R14: 0000000000000000 R15: 0000000000000000 [ 112.664621] [ 112.666233] Uninit was created at: [ 112.669766] kmsan_internal_poison_shadow+0x92/0x150 [ 112.674873] kmsan_kmalloc+0xa9/0x130 [ 112.678682] kmsan_slab_alloc+0xe/0x10 [ 112.682561] __kmalloc_node_track_caller+0xead/0x1000 [ 112.687737] __alloc_skb+0x309/0xa20 [ 112.691460] netlink_sendmsg+0xb82/0x1300 [ 112.695616] ___sys_sendmsg+0xdb3/0x1220 [ 112.699667] __se_sys_sendmsg+0x305/0x460 [ 112.703804] __x64_sys_sendmsg+0x4a/0x70 [ 112.707852] do_syscall_64+0xbc/0xf0 [ 112.711556] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 112.716730] ================================================================== [ 112.724074] Disabling lock debugging due to kernel taint [ 112.729642] Kernel panic - not syncing: panic_on_warn set ... [ 112.735521] CPU: 0 PID: 10649 Comm: syz-executor697 Tainted: G B 5.1.0-rc4+ #1 [ 112.744217] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 112.753559] Call Trace: [ 112.756172] dump_stack+0x173/0x1d0 [ 112.759813] panic+0x3d1/0xb01 [ 112.763056] kmsan_report+0x29a/0x2a0 [ 112.766865] __msan_warning+0x7a/0xf0 [ 112.770664] memchr+0xce/0x110 [ 112.773864] tipc_nl_compat_link_reset_stats+0x27f/0x460 [ 112.779334] ? tipc_nl_compat_link_set+0x1590/0x1590 [ 112.784460] tipc_nl_compat_doit+0x3aa/0xaf0 [ 112.788893] tipc_nl_compat_recv+0x1b60/0x27e0 [ 112.793494] ? tipc_nl_node_get_link+0x920/0x920 [ 112.798245] ? tipc_nl_compat_link_set+0x1590/0x1590 [ 112.803343] ? tipc_netlink_compat_stop+0x40/0x40 [ 112.808178] genl_rcv_msg+0x185f/0x1a60 [ 112.812181] ? kmsan_internal_memset_shadow+0x104/0x3a0 [ 112.817551] netlink_rcv_skb+0x431/0x620 [ 112.821624] ? genl_unbind+0x390/0x390 [ 112.825517] genl_rcv+0x63/0x80 [ 112.828803] netlink_unicast+0xf3e/0x1020 [ 112.832968] netlink_sendmsg+0x127f/0x1300 [ 112.837224] ___sys_sendmsg+0xdb3/0x1220 [ 112.841283] ? netlink_getsockopt+0x1460/0x1460 [ 112.845960] ? __fget_light+0x60/0x750 [ 112.849846] ? __fdget+0x4e/0x60 [ 112.853219] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 112.858576] ? __fget_light+0x1fe/0x750 [ 112.862554] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.867772] __se_sys_sendmsg+0x305/0x460 [ 112.871956] __x64_sys_sendmsg+0x4a/0x70 [ 112.876052] do_syscall_64+0xbc/0xf0 [ 112.879773] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 112.884951] RIP: 0033:0x444199 [ 112.888147] 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 [ 112.907039] RSP: 002b:00007fffae6ba2d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 112.914746] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444199 [ 112.922001] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000003 [ 112.929258] RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002e0 [ 112.936516] R10: 0000000000001400 R11: 0000000000000246 R12: 0000000000401e40 [ 112.943774] R13: 0000000000401ed0 R14: 0000000000000000 R15: 0000000000000000 [ 112.952042] Kernel Offset: disabled [ 112.955693] Rebooting in 86400 seconds..