[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 78.629976] audit: type=1800 audit(1553209551.685:25): pid=10197 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 78.649316] audit: type=1800 audit(1553209551.685:26): pid=10197 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 78.668930] audit: type=1800 audit(1553209551.685:27): pid=10197 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 '10.128.0.159' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 90.577638] ================================================================== [ 90.585344] BUG: KMSAN: uninit-value in ip6_compressed_string+0x1a9/0x1460 [ 90.592447] CPU: 1 PID: 10348 Comm: syz-executor196 Not tainted 5.0.0+ #16 [ 90.599662] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 90.609015] Call Trace: [ 90.611606] dump_stack+0x173/0x1d0 [ 90.615228] kmsan_report+0x131/0x2a0 [ 90.619126] __msan_warning+0x7a/0xf0 [ 90.622927] ip6_compressed_string+0x1a9/0x1460 [ 90.627669] ? __msan_poison_alloca+0x1e0/0x290 [ 90.632347] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 90.637541] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 90.642726] ip6_addr_string+0x165/0x2b0 [ 90.646787] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 90.651986] ? vsnprintf+0xabf/0x30e0 [ 90.655787] pointer+0x10f2/0x1660 [ 90.659327] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 90.664507] vsnprintf+0xabf/0x30e0 [ 90.668137] snprintf+0x246/0x290 [ 90.671683] ? depot_save_stack+0x388/0x4a0 [ 90.676013] ? rpcb_getport_async+0xfbe/0x1790 [ 90.680588] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 90.685788] rpc_sockaddr2uaddr+0x4ec/0x730 [ 90.690103] ? rpcb_getport_async+0xcf2/0x1790 [ 90.694707] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 90.699900] rpcb_getport_async+0xfbe/0x1790 [ 90.704316] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 90.709500] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 90.714768] ? call_encode+0xfb6/0xfe0 [ 90.718654] ? rpcb_v4_register+0xcd0/0xcd0 [ 90.722963] call_bind+0x1a8/0x260 [ 90.726518] ? call_encode+0xfe0/0xfe0 [ 90.730404] __rpc_execute+0x9c8/0x1670 [ 90.734412] ? call_encode+0xfe0/0xfe0 [ 90.738292] rpc_execute+0x437/0x6d0 [ 90.742015] rpc_run_task+0x8b8/0xbb0 [ 90.745814] rpc_create_xprt+0x5a3/0xd50 [ 90.749877] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 90.755089] rpc_create+0xaa6/0xb30 [ 90.758731] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 90.763934] nfs_create_rpc_client+0x723/0x920 [ 90.768523] nfs_init_client+0xb8/0x1d0 [ 90.772580] ? nfs_init_server_rpcclient+0x3f0/0x3f0 [ 90.777791] nfs_get_client+0x1487/0x16a0 [ 90.781930] ? kmem_cache_alloc_trace+0x55d/0xb40 [ 90.786926] ? kmsan_internal_memset_shadow+0xc6/0x410 [ 90.792214] nfs_create_server+0xb8b/0x34c0 [ 90.796546] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 90.801746] ? nfs_fs_mount+0x365c/0x3a20 [ 90.805911] ? nfs_free_server+0x2c0/0x2c0 [ 90.810147] nfs_try_mount+0x4de/0x14b0 [ 90.814116] ? depot_save_stack+0x388/0x4a0 [ 90.818435] ? __msan_poison_alloca+0x1e0/0x290 [ 90.823097] ? try_module_get+0x5f/0x3f0 [ 90.827158] ? get_nfs_version+0x4c2/0x550 [ 90.831410] ? try_module_get+0x5f/0x3f0 [ 90.835466] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 90.840645] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 90.845959] ? get_nfs_version+0x4c2/0x550 [ 90.850235] nfs_fs_mount+0x365c/0x3a20 [ 90.854212] ? nfs_auth_info_match+0x190/0x190 [ 90.858786] ? nfs_free_parsed_mount_data+0x1e0/0x1e0 [ 90.863963] ? nfs_fill_super+0xbf0/0xbf0 [ 90.868101] ? init_once+0x570/0x570 [ 90.871812] mount_fs+0x254/0x740 [ 90.875261] vfs_kern_mount+0x231/0x8c0 [ 90.879229] do_mount+0x1137/0x65e0 [ 90.882937] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 90.888262] ksys_mount+0x32e/0x3d0 [ 90.891891] __se_sys_mount+0xe5/0x110 [ 90.895789] __x64_sys_mount+0x62/0x80 [ 90.899765] do_syscall_64+0xbc/0xf0 [ 90.903472] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 90.908649] RIP: 0033:0x440259 [ 90.911841] 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 [ 90.930848] RSP: 002b:00007ffec6762278 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 90.938556] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440259 [ 90.945818] RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000000 [ 90.953084] RBP: 00000000006ca018 R08: 000000002000a000 R09: 0000000000000000 [ 90.960601] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ae0 [ 90.967892] R13: 0000000000401b70 R14: 0000000000000000 R15: 0000000000000000 [ 90.975281] [ 90.976992] Uninit was stored to memory at: [ 90.981307] kmsan_internal_chain_origin+0x134/0x230 [ 90.986487] kmsan_memcpy_memmove_metadata+0xb5b/0xfe0 [ 90.991772] kmsan_memcpy_metadata+0xb/0x10 [ 90.996090] __msan_memcpy+0x58/0x70 [ 90.999791] ip6_compressed_string+0x89/0x1460 [ 91.004367] ip6_addr_string+0x165/0x2b0 [ 91.008427] pointer+0x10f2/0x1660 [ 91.011955] vsnprintf+0xabf/0x30e0 [ 91.015594] snprintf+0x246/0x290 [ 91.019040] rpc_sockaddr2uaddr+0x4ec/0x730 [ 91.023368] rpcb_getport_async+0xfbe/0x1790 [ 91.027841] call_bind+0x1a8/0x260 [ 91.031371] __rpc_execute+0x9c8/0x1670 [ 91.035344] rpc_execute+0x437/0x6d0 [ 91.039075] rpc_run_task+0x8b8/0xbb0 [ 91.042953] rpc_create_xprt+0x5a3/0xd50 [ 91.047104] rpc_create+0xaa6/0xb30 [ 91.050721] nfs_create_rpc_client+0x723/0x920 [ 91.055290] nfs_init_client+0xb8/0x1d0 [ 91.059267] nfs_get_client+0x1487/0x16a0 [ 91.063408] nfs_create_server+0xb8b/0x34c0 [ 91.067730] nfs_try_mount+0x4de/0x14b0 [ 91.071703] nfs_fs_mount+0x365c/0x3a20 [ 91.075663] mount_fs+0x254/0x740 [ 91.079108] vfs_kern_mount+0x231/0x8c0 [ 91.083098] do_mount+0x1137/0x65e0 [ 91.086718] ksys_mount+0x32e/0x3d0 [ 91.090345] __se_sys_mount+0xe5/0x110 [ 91.094224] __x64_sys_mount+0x62/0x80 [ 91.098097] do_syscall_64+0xbc/0xf0 [ 91.101793] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 91.106962] [ 91.108665] Local variable description: ----addr@rpcb_getport_async [ 91.115052] Variable was created at: [ 91.118764] rpcb_getport_async+0xb3/0x1790 [ 91.123074] call_bind+0x1a8/0x260 [ 91.126609] ================================================================== [ 91.133951] Disabling lock debugging due to kernel taint [ 91.139474] Kernel panic - not syncing: panic_on_warn set ... [ 91.145371] CPU: 1 PID: 10348 Comm: syz-executor196 Tainted: G B 5.0.0+ #16 [ 91.153775] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.163120] Call Trace: [ 91.165724] dump_stack+0x173/0x1d0 [ 91.169341] panic+0x3d1/0xb01 [ 91.172543] kmsan_report+0x29a/0x2a0 [ 91.176340] __msan_warning+0x7a/0xf0 [ 91.180131] ip6_compressed_string+0x1a9/0x1460 [ 91.184792] ? __msan_poison_alloca+0x1e0/0x290 [ 91.189451] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 91.194654] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 91.199851] ip6_addr_string+0x165/0x2b0 [ 91.203917] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 91.209107] ? vsnprintf+0xabf/0x30e0 [ 91.212901] pointer+0x10f2/0x1660 [ 91.216479] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 91.221875] vsnprintf+0xabf/0x30e0 [ 91.225510] snprintf+0x246/0x290 [ 91.229056] ? depot_save_stack+0x388/0x4a0 [ 91.233395] ? rpcb_getport_async+0xfbe/0x1790 [ 91.237997] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 91.243306] rpc_sockaddr2uaddr+0x4ec/0x730 [ 91.247621] ? rpcb_getport_async+0xcf2/0x1790 [ 91.252199] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 91.257394] rpcb_getport_async+0xfbe/0x1790 [ 91.261825] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 91.267011] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 91.272283] ? call_encode+0xfb6/0xfe0 [ 91.276171] ? rpcb_v4_register+0xcd0/0xcd0 [ 91.280485] call_bind+0x1a8/0x260 [ 91.284104] ? call_encode+0xfe0/0xfe0 [ 91.287993] __rpc_execute+0x9c8/0x1670 [ 91.291981] ? call_encode+0xfe0/0xfe0 [ 91.295867] rpc_execute+0x437/0x6d0 [ 91.299643] rpc_run_task+0x8b8/0xbb0 [ 91.303554] rpc_create_xprt+0x5a3/0xd50 [ 91.307626] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 91.312820] rpc_create+0xaa6/0xb30 [ 91.316444] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 91.321628] nfs_create_rpc_client+0x723/0x920 [ 91.326284] nfs_init_client+0xb8/0x1d0 [ 91.330270] ? nfs_init_server_rpcclient+0x3f0/0x3f0 [ 91.335367] nfs_get_client+0x1487/0x16a0 [ 91.339514] ? kmem_cache_alloc_trace+0x55d/0xb40 [ 91.344372] ? kmsan_internal_memset_shadow+0xc6/0x410 [ 91.349698] nfs_create_server+0xb8b/0x34c0 [ 91.354034] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 91.359231] ? nfs_fs_mount+0x365c/0x3a20 [ 91.363368] ? nfs_free_server+0x2c0/0x2c0 [ 91.367586] nfs_try_mount+0x4de/0x14b0 [ 91.371569] ? depot_save_stack+0x388/0x4a0 [ 91.375899] ? __msan_poison_alloca+0x1e0/0x290 [ 91.380765] ? try_module_get+0x5f/0x3f0 [ 91.384903] ? get_nfs_version+0x4c2/0x550 [ 91.389128] ? try_module_get+0x5f/0x3f0 [ 91.393182] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 91.398377] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 91.403774] ? get_nfs_version+0x4c2/0x550 [ 91.408004] nfs_fs_mount+0x365c/0x3a20 [ 91.412069] ? nfs_auth_info_match+0x190/0x190 [ 91.416721] ? nfs_free_parsed_mount_data+0x1e0/0x1e0 [ 91.421913] ? nfs_fill_super+0xbf0/0xbf0 [ 91.426058] ? init_once+0x570/0x570 [ 91.429759] mount_fs+0x254/0x740 [ 91.433223] vfs_kern_mount+0x231/0x8c0 [ 91.437296] do_mount+0x1137/0x65e0 [ 91.440923] ? kmsan_get_shadow_origin_ptr+0x73/0x490 [ 91.451614] ksys_mount+0x32e/0x3d0 [ 91.455269] __se_sys_mount+0xe5/0x110 [ 91.459159] __x64_sys_mount+0x62/0x80 [ 91.463275] do_syscall_64+0xbc/0xf0 [ 91.466982] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 91.472167] RIP: 0033:0x440259 [ 91.475351] 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 [ 91.494270] RSP: 002b:00007ffec6762278 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 91.501990] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440259 [ 91.509372] RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000000 [ 91.516844] RBP: 00000000006ca018 R08: 000000002000a000 R09: 0000000000000000 [ 91.524109] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ae0 [ 91.531389] R13: 0000000000401b70 R14: 0000000000000000 R15: 0000000000000000 [ 91.540487] Kernel Offset: disabled [ 91.544120] Rebooting in 86400 seconds..