[ 96.241569] audit: type=1800 audit(1554614743.286:25): pid=10277 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 96.272288] audit: type=1800 audit(1554614743.316:26): pid=10277 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 96.313094] audit: type=1800 audit(1554614743.346:27): pid=10277 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. [ 99.298792] sshd (10414) used greatest stack depth: 53616 bytes left Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.138' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 106.951011] ================================================================== [ 106.958450] BUG: KMSAN: uninit-value in rtnl_stats_get+0x6d9/0x11d0 [ 106.964888] CPU: 0 PID: 10428 Comm: syz-executor034 Not tainted 5.1.0-rc2+ #24 [ 106.972250] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 106.981610] Call Trace: [ 106.984210] dump_stack+0x173/0x1d0 [ 106.987855] kmsan_report+0x131/0x2a0 [ 106.991658] __msan_warning+0x7a/0xf0 [ 106.995478] rtnl_stats_get+0x6d9/0x11d0 [ 106.999552] ? wait_for_completion_killable+0xb0/0xc0 [ 107.004752] ? rtnl_bridge_setlink+0xc80/0xc80 [ 107.009338] rtnetlink_rcv_msg+0x115b/0x1550 [ 107.013748] ? kmsan_internal_poison_shadow+0x92/0x150 [ 107.019043] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 107.024413] ? __msan_poison_alloca+0x1e0/0x290 [ 107.029088] ? __local_bh_enable_ip+0x49/0x1f0 [ 107.033666] ? _raw_spin_unlock_bh+0x4b/0x60 [ 107.038073] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 107.043268] ? kmsan_internal_memset_shadow+0x104/0x3a0 [ 107.048659] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 107.053861] netlink_rcv_skb+0x431/0x620 [ 107.057919] ? rtnetlink_bind+0x120/0x120 [ 107.062122] rtnetlink_rcv+0x50/0x60 [ 107.065865] netlink_unicast+0xf3e/0x1020 [ 107.070045] netlink_sendmsg+0x127f/0x1300 [ 107.074303] ___sys_sendmsg+0xdb3/0x1220 [ 107.078368] ? netlink_getsockopt+0x1460/0x1460 [ 107.083062] ? __fget_light+0x60/0x750 [ 107.086942] ? __fdget+0x4e/0x60 [ 107.090306] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 107.095669] ? __fget_light+0x1fe/0x750 [ 107.099636] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 107.104852] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 107.110042] __se_sys_sendmsg+0x305/0x460 [ 107.114211] __x64_sys_sendmsg+0x4a/0x70 [ 107.118290] do_syscall_64+0xbc/0xf0 [ 107.122026] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 107.127222] RIP: 0033:0x4401e9 [ 107.130415] 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 107.149428] RSP: 002b:00007ffc33acd988 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 107.157142] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401e9 [ 107.164406] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 107.171683] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 107.178944] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a70 [ 107.186269] R13: 0000000000401b00 R14: 0000000000000000 R15: 0000000000000000 [ 107.193568] [ 107.195191] Uninit was created at: [ 107.198740] kmsan_internal_poison_shadow+0x92/0x150 [ 107.203834] kmsan_kmalloc+0xa9/0x130 [ 107.207632] kmsan_slab_alloc+0xe/0x10 [ 107.211514] __kmalloc_node_track_caller+0xead/0x1000 [ 107.216701] __alloc_skb+0x309/0xa20 [ 107.220411] netlink_sendmsg+0xb82/0x1300 [ 107.224562] ___sys_sendmsg+0xdb3/0x1220 [ 107.228614] __se_sys_sendmsg+0x305/0x460 [ 107.232839] __x64_sys_sendmsg+0x4a/0x70 [ 107.236891] do_syscall_64+0xbc/0xf0 [ 107.240708] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 107.245881] ================================================================== [ 107.253227] Disabling lock debugging due to kernel taint [ 107.258672] Kernel panic - not syncing: panic_on_warn set ... [ 107.264550] CPU: 0 PID: 10428 Comm: syz-executor034 Tainted: G B 5.1.0-rc2+ #24 [ 107.273293] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 107.282670] Call Trace: [ 107.285268] dump_stack+0x173/0x1d0 [ 107.288918] panic+0x3d1/0xb01 [ 107.292175] kmsan_report+0x29a/0x2a0 [ 107.296004] __msan_warning+0x7a/0xf0 [ 107.299825] rtnl_stats_get+0x6d9/0x11d0 [ 107.303896] ? wait_for_completion_killable+0xb0/0xc0 [ 107.309089] ? rtnl_bridge_setlink+0xc80/0xc80 [ 107.313668] rtnetlink_rcv_msg+0x115b/0x1550 [ 107.318070] ? kmsan_internal_poison_shadow+0x92/0x150 [ 107.323376] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 107.328746] ? __msan_poison_alloca+0x1e0/0x290 [ 107.333416] ? __local_bh_enable_ip+0x49/0x1f0 [ 107.338001] ? _raw_spin_unlock_bh+0x4b/0x60 [ 107.342417] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 107.347615] ? kmsan_internal_memset_shadow+0x104/0x3a0 [ 107.353007] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 107.358302] netlink_rcv_skb+0x431/0x620 [ 107.362377] ? rtnetlink_bind+0x120/0x120 [ 107.366547] rtnetlink_rcv+0x50/0x60 [ 107.370272] netlink_unicast+0xf3e/0x1020 [ 107.374443] netlink_sendmsg+0x127f/0x1300 [ 107.378699] ___sys_sendmsg+0xdb3/0x1220 [ 107.383252] ? netlink_getsockopt+0x1460/0x1460 [ 107.387949] ? __fget_light+0x60/0x750 [ 107.391829] ? __fdget+0x4e/0x60 [ 107.395216] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 107.400574] ? __fget_light+0x1fe/0x750 [ 107.404547] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 107.410030] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 107.415248] __se_sys_sendmsg+0x305/0x460 [ 107.419415] __x64_sys_sendmsg+0x4a/0x70 [ 107.423488] do_syscall_64+0xbc/0xf0 [ 107.427205] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 107.432392] RIP: 0033:0x4401e9 [ 107.435581] 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 107.454494] RSP: 002b:00007ffc33acd988 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 107.462211] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401e9 [ 107.469494] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 107.476754] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 107.484012] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a70 [ 107.491277] R13: 0000000000401b00 R14: 0000000000000000 R15: 0000000000000000 [ 107.499296] Kernel Offset: disabled [ 107.502935] Rebooting in 86400 seconds..