[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 100.195642][ T30] audit: type=1800 audit(1562106196.259:25): pid=12913 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 100.221506][ T30] audit: type=1800 audit(1562106196.279:26): pid=12913 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 100.263548][ T30] audit: type=1800 audit(1562106196.309:27): pid=12913 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 '10.128.0.97' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program syzkaller login: [ 113.408012][T13069] ================================================================== [ 113.416121][T13069] BUG: KMSAN: uninit-value in memchr+0xce/0x110 [ 113.422405][T13069] CPU: 0 PID: 13069 Comm: syz-executor525 Not tainted 5.2.0-rc4+ #7 [ 113.430378][T13069] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.440550][T13069] Call Trace: [ 113.444050][T13069] dump_stack+0x191/0x1f0 [ 113.448897][T13069] kmsan_report+0x162/0x2d0 [ 113.453449][T13069] __msan_warning+0x75/0xe0 [ 113.458019][T13069] memchr+0xce/0x110 [ 113.462187][T13069] tipc_nl_compat_bearer_disable+0x2a1/0x480 [ 113.468316][T13069] ? tipc_nl_compat_doit+0xb10/0xb10 [ 113.476347][T13069] tipc_nl_compat_doit+0x3ac/0xb10 [ 113.481509][T13069] tipc_nl_compat_recv+0x13c6/0x27b0 [ 113.486847][T13069] ? tipc_nl_bearer_get+0xa10/0xa10 [ 113.492071][T13069] ? tipc_nl_compat_doit+0xb10/0xb10 [ 113.506654][T13069] ? tipc_netlink_compat_stop+0x40/0x40 [ 113.512443][T13069] genl_rcv_msg+0x16c5/0x1f20 [ 113.517750][T13069] ? kmsan_internal_memset_shadow+0x104/0x3a0 [ 113.524236][T13069] netlink_rcv_skb+0x431/0x620 [ 113.531240][T13069] ? genl_unbind+0x390/0x390 [ 113.538673][T13069] genl_rcv+0x63/0x80 [ 113.542754][T13069] netlink_unicast+0xf3e/0x1020 [ 113.549619][T13069] netlink_sendmsg+0x127e/0x12f0 [ 113.554742][T13069] ? netlink_getsockopt+0x1430/0x1430 [ 113.560105][T13069] ___sys_sendmsg+0x12ff/0x13c0 [ 113.564976][T13069] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 113.570867][T13069] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 113.576924][T13069] ? __fget_light+0x1b8/0x710 [ 113.581606][T13069] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 113.587493][T13069] __se_sys_sendmsg+0x305/0x460 [ 113.592353][T13069] __x64_sys_sendmsg+0x4a/0x70 [ 113.597116][T13069] do_syscall_64+0xbc/0xf0 [ 113.601690][T13069] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 113.607571][T13069] RIP: 0033:0x4411b9 [ 113.611569][T13069] Code: e8 fc ab 02 00 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 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 113.631181][T13069] RSP: 002b:00007ffd5cc4f0b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 113.639584][T13069] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004411b9 [ 113.647541][T13069] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 [ 113.655518][T13069] RBP: 000000000001bb3b R08: 00000000004002c8 R09: 00000000004002c8 [ 113.663502][T13069] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000401fe0 [ 113.671464][T13069] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000 [ 113.679440][T13069] [ 113.681767][T13069] Uninit was created at: [ 113.686006][T13069] kmsan_internal_poison_shadow+0x53/0xa0 [ 113.691767][T13069] kmsan_kmalloc+0xa4/0x130 [ 113.696276][T13069] kmsan_slab_alloc+0xe/0x10 [ 113.700864][T13069] __kmalloc_node_track_caller+0xcba/0xf30 [ 113.706915][T13069] __alloc_skb+0x306/0xa10 [ 113.711332][T13069] netlink_sendmsg+0xb81/0x12f0 [ 113.716201][T13069] ___sys_sendmsg+0x12ff/0x13c0 [ 113.721046][T13069] __se_sys_sendmsg+0x305/0x460 [ 113.725907][T13069] __x64_sys_sendmsg+0x4a/0x70 [ 113.730679][T13069] do_syscall_64+0xbc/0xf0 [ 113.735092][T13069] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 113.740985][T13069] ================================================================== [ 113.749032][T13069] Disabling lock debugging due to kernel taint [ 113.755173][T13069] Kernel panic - not syncing: panic_on_warn set ... [ 113.761755][T13069] CPU: 0 PID: 13069 Comm: syz-executor525 Tainted: G B 5.2.0-rc4+ #7 [ 113.771118][T13069] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.781172][T13069] Call Trace: [ 113.784465][T13069] dump_stack+0x191/0x1f0 [ 113.788801][T13069] panic+0x3c9/0xc1e [ 113.792719][T13069] kmsan_report+0x2ca/0x2d0 [ 113.797242][T13069] __msan_warning+0x75/0xe0 [ 113.801743][T13069] memchr+0xce/0x110 [ 113.805638][T13069] tipc_nl_compat_bearer_disable+0x2a1/0x480 [ 113.811801][T13069] ? tipc_nl_compat_doit+0xb10/0xb10 [ 113.817110][T13069] tipc_nl_compat_doit+0x3ac/0xb10 [ 113.822287][T13069] tipc_nl_compat_recv+0x13c6/0x27b0 [ 113.827620][T13069] ? tipc_nl_bearer_get+0xa10/0xa10 [ 113.832824][T13069] ? tipc_nl_compat_doit+0xb10/0xb10 [ 113.838143][T13069] ? tipc_netlink_compat_stop+0x40/0x40 [ 113.843813][T13069] genl_rcv_msg+0x16c5/0x1f20 [ 113.848528][T13069] ? kmsan_internal_memset_shadow+0x104/0x3a0 [ 113.854604][T13069] netlink_rcv_skb+0x431/0x620 [ 113.859362][T13069] ? genl_unbind+0x390/0x390 [ 113.863962][T13069] genl_rcv+0x63/0x80 [ 113.867995][T13069] netlink_unicast+0xf3e/0x1020 [ 113.872876][T13069] netlink_sendmsg+0x127e/0x12f0 [ 113.877829][T13069] ? netlink_getsockopt+0x1430/0x1430 [ 113.883219][T13069] ___sys_sendmsg+0x12ff/0x13c0 [ 113.888115][T13069] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 113.894011][T13069] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 113.900072][T13069] ? __fget_light+0x1b8/0x710 [ 113.904793][T13069] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 113.910704][T13069] __se_sys_sendmsg+0x305/0x460 [ 113.915571][T13069] __x64_sys_sendmsg+0x4a/0x70 [ 113.920328][T13069] do_syscall_64+0xbc/0xf0 [ 113.926565][T13069] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 113.932446][T13069] RIP: 0033:0x4411b9 [ 113.936332][T13069] Code: e8 fc ab 02 00 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 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 113.955927][T13069] RSP: 002b:00007ffd5cc4f0b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 113.964441][T13069] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004411b9 [ 113.972413][T13069] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 [ 113.980381][T13069] RBP: 000000000001bb3b R08: 00000000004002c8 R09: 00000000004002c8 [ 113.988345][T13069] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000401fe0 [ 113.996412][T13069] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000 [ 114.005721][T13069] Kernel Offset: disabled [ 114.010175][T13069] Rebooting in 86400 seconds..