[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 97.771300] audit: type=1800 audit(1555702024.813:25): pid=10493 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 97.796084] audit: type=1800 audit(1555702024.843:26): pid=10493 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 97.832038] audit: type=1800 audit(1555702024.873:27): pid=10493 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 '10.128.0.114' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 110.528671] ================================================================== [ 110.536096] BUG: KMSAN: uninit-value in ip6_compressed_string+0x1de/0x1490 [ 110.543113] CPU: 0 PID: 10643 Comm: syz-executor236 Not tainted 5.1.0-rc4+ #1 [ 110.550387] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 110.559754] Call Trace: [ 110.562373] dump_stack+0x173/0x1d0 [ 110.566008] kmsan_report+0x131/0x2a0 [ 110.569813] __msan_warning+0x7a/0xf0 [ 110.573616] ip6_compressed_string+0x1de/0x1490 [ 110.578289] ? __msan_poison_alloca+0x1e0/0x290 [ 110.583052] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 110.588255] ip6_addr_string+0x165/0x2b0 [ 110.592370] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 110.597555] ? vsnprintf+0x1c24/0x3230 [ 110.601442] pointer+0x10f2/0x1660 [ 110.604992] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 110.610179] vsnprintf+0x1c24/0x3230 [ 110.613916] snprintf+0x246/0x290 [ 110.617372] ? depot_save_stack+0x388/0x4a0 [ 110.621700] ? rpcb_getport_async+0xfbe/0x1790 [ 110.626297] rpc_sockaddr2uaddr+0x4ec/0x730 [ 110.630628] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 110.635918] rpcb_getport_async+0xfbe/0x1790 [ 110.640448] ? _raw_spin_unlock_bh+0x4b/0x60 [ 110.644877] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 110.650068] ? rpcb_v4_register+0xcd0/0xcd0 [ 110.654389] call_encode+0xba0/0x1650 [ 110.658201] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 110.663420] call_allocate+0x1a5/0x920 [ 110.667337] call_refreshresult+0x15d/0x580 [ 110.671660] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 110.676870] call_reserveresult+0x6b8/0x740 [ 110.681216] call_start+0x73c/0x790 [ 110.684871] ? rpc_prepare_reply_pages+0x3b0/0x3b0 [ 110.689796] __rpc_execute+0x968/0x1610 [ 110.693774] ? rpc_prepare_reply_pages+0x3b0/0x3b0 [ 110.698707] rpc_execute+0x437/0x6d0 [ 110.702428] rpc_run_task+0x8b8/0xbb0 [ 110.706248] rpc_create_xprt+0x5a3/0xd50 [ 110.710303] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 110.715525] rpc_create+0xaa6/0xb30 [ 110.719168] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 110.724364] nfs_create_rpc_client+0x723/0x920 [ 110.728963] nfs_init_client+0xb8/0x1d0 [ 110.732948] ? nfs_init_server_rpcclient+0x430/0x430 [ 110.738059] nfs_get_client+0x1487/0x16a0 [ 110.742214] ? kmem_cache_alloc_trace+0x55d/0xb50 [ 110.747102] ? kmsan_internal_memset_shadow+0x104/0x3a0 [ 110.752499] nfs_create_server+0xb9a/0x3550 [ 110.756858] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 110.762042] ? nfs_fs_mount+0x36b2/0x3a70 [ 110.766193] nfs_try_mount+0x1134/0x1550 [ 110.770265] ? __msan_poison_alloca+0x1e0/0x290 [ 110.774939] ? try_module_get+0x5f/0x3f0 [ 110.779011] ? get_nfs_version+0x4c2/0x550 [ 110.783256] ? try_module_get+0x5f/0x3f0 [ 110.787315] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 110.792504] ? _raw_spin_lock+0x92/0x110 [ 110.796568] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 110.801753] ? get_nfs_version+0x4c2/0x550 [ 110.805997] nfs_fs_mount+0x36b2/0x3a70 [ 110.809978] ? nfs_auth_info_match+0x190/0x190 [ 110.814555] ? nfs_free_parsed_mount_data+0x1e0/0x1e0 [ 110.819736] ? nfs_fill_super+0xbf0/0xbf0 [ 110.823887] legacy_get_tree+0x163/0x2d0 [ 110.827940] ? init_once+0x570/0x570 [ 110.831656] ? legacy_parse_monolithic+0x2c0/0x2c0 [ 110.836585] vfs_get_tree+0x1ae/0x810 [ 110.840484] do_mount+0x31d4/0x65f0 [ 110.844132] ksys_mount+0x32e/0x3d0 [ 110.847771] __se_sys_mount+0xe5/0x110 [ 110.851666] __x64_sys_mount+0x62/0x80 [ 110.855552] do_syscall_64+0xbc/0xf0 [ 110.859264] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 110.864446] RIP: 0033:0x440259 [ 110.867629] 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 [ 110.886542] RSP: 002b:00007ffec6792528 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 110.894270] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440259 [ 110.901535] RDX: 000000002015bffc RSI: 0000000020343ff8 RDI: 0000000000000000 [ 110.908799] RBP: 00000000006ca018 R08: 000000002000a000 R09: 0000000000000000 [ 110.916065] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ae0 [ 110.923353] R13: 0000000000401b70 R14: 0000000000000000 R15: 0000000000000000 [ 110.930636] [ 110.932251] Uninit was stored to memory at: [ 110.936803] kmsan_internal_chain_origin+0x134/0x230 [ 110.941921] kmsan_memcpy_memmove_metadata+0x989/0xd60 [ 110.947241] kmsan_memcpy_metadata+0xb/0x10 [ 110.951556] __msan_memcpy+0x58/0x70 [ 110.955276] ip6_compressed_string+0xbe/0x1490 [ 110.959867] ip6_addr_string+0x165/0x2b0 [ 110.963936] pointer+0x10f2/0x1660 [ 110.967465] vsnprintf+0x1c24/0x3230 [ 110.971169] snprintf+0x246/0x290 [ 110.974615] rpc_sockaddr2uaddr+0x4ec/0x730 [ 110.978935] rpcb_getport_async+0xfbe/0x1790 [ 110.983336] call_encode+0xba0/0x1650 [ 110.987146] call_allocate+0x1a5/0x920 [ 110.991046] call_refreshresult+0x15d/0x580 [ 110.995358] call_reserveresult+0x6b8/0x740 [ 110.999667] call_start+0x73c/0x790 [ 111.003284] __rpc_execute+0x968/0x1610 [ 111.007262] rpc_execute+0x437/0x6d0 [ 111.010979] rpc_run_task+0x8b8/0xbb0 [ 111.014778] rpc_create_xprt+0x5a3/0xd50 [ 111.018874] rpc_create+0xaa6/0xb30 [ 111.022505] nfs_create_rpc_client+0x723/0x920 [ 111.027077] nfs_init_client+0xb8/0x1d0 [ 111.031041] nfs_get_client+0x1487/0x16a0 [ 111.035185] nfs_create_server+0xb9a/0x3550 [ 111.039502] nfs_try_mount+0x1134/0x1550 [ 111.043559] nfs_fs_mount+0x36b2/0x3a70 [ 111.047537] legacy_get_tree+0x163/0x2d0 [ 111.051590] vfs_get_tree+0x1ae/0x810 [ 111.055386] do_mount+0x31d4/0x65f0 [ 111.059000] ksys_mount+0x32e/0x3d0 [ 111.062617] __se_sys_mount+0xe5/0x110 [ 111.066495] __x64_sys_mount+0x62/0x80 [ 111.070381] do_syscall_64+0xbc/0xf0 [ 111.074087] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 111.079273] [ 111.080888] Local variable description: ----addr@rpcb_getport_async [ 111.087276] Variable was created at: [ 111.090988] rpcb_getport_async+0xb3/0x1790 [ 111.095325] call_encode+0xba0/0x1650 [ 111.099165] ================================================================== [ 111.106508] Disabling lock debugging due to kernel taint [ 111.111954] Kernel panic - not syncing: panic_on_warn set ... [ 111.117848] CPU: 0 PID: 10643 Comm: syz-executor236 Tainted: G B 5.1.0-rc4+ #1 [ 111.126500] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 111.135850] Call Trace: [ 111.138456] dump_stack+0x173/0x1d0 [ 111.142091] panic+0x3d1/0xb01 [ 111.145311] kmsan_report+0x29a/0x2a0 [ 111.149115] __msan_warning+0x7a/0xf0 [ 111.152940] ip6_compressed_string+0x1de/0x1490 [ 111.157612] ? __msan_poison_alloca+0x1e0/0x290 [ 111.162302] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.167498] ip6_addr_string+0x165/0x2b0 [ 111.171606] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.176795] ? vsnprintf+0x1c24/0x3230 [ 111.180697] pointer+0x10f2/0x1660 [ 111.184259] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.189450] vsnprintf+0x1c24/0x3230 [ 111.193186] snprintf+0x246/0x290 [ 111.196658] ? depot_save_stack+0x388/0x4a0 [ 111.201010] ? rpcb_getport_async+0xfbe/0x1790 [ 111.205608] rpc_sockaddr2uaddr+0x4ec/0x730 [ 111.209953] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.215156] rpcb_getport_async+0xfbe/0x1790 [ 111.219603] ? _raw_spin_unlock_bh+0x4b/0x60 [ 111.224015] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.229207] ? rpcb_v4_register+0xcd0/0xcd0 [ 111.233631] call_encode+0xba0/0x1650 [ 111.237461] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.242658] call_allocate+0x1a5/0x920 [ 111.246565] call_refreshresult+0x15d/0x580 [ 111.250882] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.256078] call_reserveresult+0x6b8/0x740 [ 111.260402] call_start+0x73c/0x790 [ 111.264040] ? rpc_prepare_reply_pages+0x3b0/0x3b0 [ 111.268982] __rpc_execute+0x968/0x1610 [ 111.272974] ? rpc_prepare_reply_pages+0x3b0/0x3b0 [ 111.277906] rpc_execute+0x437/0x6d0 [ 111.281627] rpc_run_task+0x8b8/0xbb0 [ 111.285437] rpc_create_xprt+0x5a3/0xd50 [ 111.289492] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.294706] rpc_create+0xaa6/0xb30 [ 111.298354] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.303559] nfs_create_rpc_client+0x723/0x920 [ 111.308185] nfs_init_client+0xb8/0x1d0 [ 111.312170] ? nfs_init_server_rpcclient+0x430/0x430 [ 111.317278] nfs_get_client+0x1487/0x16a0 [ 111.321431] ? kmem_cache_alloc_trace+0x55d/0xb50 [ 111.326286] ? kmsan_internal_memset_shadow+0x104/0x3a0 [ 111.331680] nfs_create_server+0xb9a/0x3550 [ 111.336047] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.341267] ? nfs_fs_mount+0x36b2/0x3a70 [ 111.345420] nfs_try_mount+0x1134/0x1550 [ 111.349483] ? __msan_poison_alloca+0x1e0/0x290 [ 111.354170] ? try_module_get+0x5f/0x3f0 [ 111.358230] ? get_nfs_version+0x4c2/0x550 [ 111.362489] ? try_module_get+0x5f/0x3f0 [ 111.366557] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.371743] ? _raw_spin_lock+0x92/0x110 [ 111.375814] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.380999] ? get_nfs_version+0x4c2/0x550 [ 111.385277] nfs_fs_mount+0x36b2/0x3a70 [ 111.389273] ? nfs_auth_info_match+0x190/0x190 [ 111.393850] ? nfs_free_parsed_mount_data+0x1e0/0x1e0 [ 111.399033] ? nfs_fill_super+0xbf0/0xbf0 [ 111.403191] legacy_get_tree+0x163/0x2d0 [ 111.407337] ? init_once+0x570/0x570 [ 111.411055] ? legacy_parse_monolithic+0x2c0/0x2c0 [ 111.415982] vfs_get_tree+0x1ae/0x810 [ 111.419788] do_mount+0x31d4/0x65f0 [ 111.423439] ksys_mount+0x32e/0x3d0 [ 111.427073] __se_sys_mount+0xe5/0x110 [ 111.430978] __x64_sys_mount+0x62/0x80 [ 111.434866] do_syscall_64+0xbc/0xf0 [ 111.438580] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 111.443769] RIP: 0033:0x440259 [ 111.446954] 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 [ 111.465938] RSP: 002b:00007ffec6792528 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 111.473647] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440259 [ 111.480919] RDX: 000000002015bffc RSI: 0000000020343ff8 RDI: 0000000000000000 [ 111.488185] RBP: 00000000006ca018 R08: 000000002000a000 R09: 0000000000000000 [ 111.495950] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ae0 [ 111.503218] R13: 0000000000401b70 R14: 0000000000000000 R15: 0000000000000000 [ 111.511264] Kernel Offset: disabled [ 111.514902] Rebooting in 86400 seconds..