[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 99.648868] audit: type=1800 audit(1556264982.691:25): pid=10482 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 99.673281] audit: type=1800 audit(1556264982.721:26): pid=10482 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 99.722541] audit: type=1800 audit(1556264982.741:27): pid=10482 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 '10.128.0.121' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 111.848831] ================================================================== [ 111.856242] BUG: KMSAN: uninit-value in ip6_compressed_string+0x1de/0x1490 [ 111.863248] CPU: 1 PID: 10632 Comm: syz-executor156 Not tainted 5.1.0-rc4+ #1 [ 111.870502] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 111.879839] Call Trace: [ 111.882444] dump_stack+0x173/0x1d0 [ 111.886076] kmsan_report+0x131/0x2a0 [ 111.889874] __msan_warning+0x7a/0xf0 [ 111.893674] ip6_compressed_string+0x1de/0x1490 [ 111.898339] ? __msan_poison_alloca+0x1e0/0x290 [ 111.903002] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.908187] ip6_addr_string+0x165/0x2b0 [ 111.912272] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.917461] ? vsnprintf+0x1c24/0x3230 [ 111.921346] pointer+0x10f2/0x1660 [ 111.924896] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.930081] vsnprintf+0x1c24/0x3230 [ 111.933810] snprintf+0x246/0x290 [ 111.937264] ? depot_save_stack+0x388/0x4a0 [ 111.941598] ? rpcb_getport_async+0xfbe/0x1790 [ 111.946176] rpc_sockaddr2uaddr+0x4ec/0x730 [ 111.950505] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.955707] rpcb_getport_async+0xfbe/0x1790 [ 111.960151] ? _raw_spin_unlock_bh+0x4b/0x60 [ 111.964558] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.969748] ? rpcb_v4_register+0xcd0/0xcd0 [ 111.974060] call_encode+0xba0/0x1650 [ 111.977868] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 111.983162] call_allocate+0x1a5/0x920 [ 111.991914] call_refreshresult+0x15d/0x580 [ 111.996246] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.001433] call_reserveresult+0x6b8/0x740 [ 112.005757] call_start+0x73c/0x790 [ 112.009386] ? rpc_prepare_reply_pages+0x3b0/0x3b0 [ 112.014306] __rpc_execute+0x968/0x1610 [ 112.018542] ? rpc_prepare_reply_pages+0x3b0/0x3b0 [ 112.023473] rpc_execute+0x437/0x6d0 [ 112.027187] rpc_run_task+0x8b8/0xbb0 [ 112.030998] rpc_create_xprt+0x5a3/0xd50 [ 112.035056] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.040259] rpc_create+0xaa6/0xb30 [ 112.043899] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.049087] nfs_create_rpc_client+0x723/0x920 [ 112.053689] nfs_init_client+0xb8/0x1d0 [ 112.057659] ? nfs_init_server_rpcclient+0x430/0x430 [ 112.062769] nfs_get_client+0x1487/0x16a0 [ 112.066926] ? kmem_cache_alloc_trace+0x55d/0xb50 [ 112.071770] ? kmsan_internal_memset_shadow+0x104/0x3a0 [ 112.077149] nfs_create_server+0xb9a/0x3550 [ 112.081500] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.086685] ? nfs_fs_mount+0x36b2/0x3a70 [ 112.090828] nfs_try_mount+0x1134/0x1550 [ 112.094887] ? __msan_poison_alloca+0x1e0/0x290 [ 112.099553] ? try_module_get+0x5f/0x3f0 [ 112.103608] ? get_nfs_version+0x4c2/0x550 [ 112.107841] ? try_module_get+0x5f/0x3f0 [ 112.111896] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.117093] ? _raw_spin_lock+0x92/0x110 [ 112.121172] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.126377] ? get_nfs_version+0x4c2/0x550 [ 112.130617] nfs_fs_mount+0x36b2/0x3a70 [ 112.134606] ? nfs_auth_info_match+0x190/0x190 [ 112.139182] ? nfs_free_parsed_mount_data+0x1e0/0x1e0 [ 112.144362] ? nfs_fill_super+0xbf0/0xbf0 [ 112.148505] legacy_get_tree+0x163/0x2d0 [ 112.152577] ? init_once+0x570/0x570 [ 112.156305] ? legacy_parse_monolithic+0x2c0/0x2c0 [ 112.161223] vfs_get_tree+0x1ae/0x810 [ 112.165026] do_mount+0x31d4/0x65f0 [ 112.168690] ksys_mount+0x32e/0x3d0 [ 112.172329] __se_sys_mount+0xe5/0x110 [ 112.176232] __x64_sys_mount+0x62/0x80 [ 112.180110] do_syscall_64+0xbc/0xf0 [ 112.183820] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 112.188996] RIP: 0033:0x440259 [ 112.192175] 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 [ 112.211078] RSP: 002b:00007ffd251d6208 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 112.218773] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440259 [ 112.226028] RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000000 [ 112.233285] RBP: 00000000006ca018 R08: 000000002000a000 R09: 0000000000000000 [ 112.240545] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ae0 [ 112.247804] R13: 0000000000401b70 R14: 0000000000000000 R15: 0000000000000000 [ 112.255092] [ 112.256705] Uninit was stored to memory at: [ 112.261018] kmsan_internal_chain_origin+0x134/0x230 [ 112.266112] kmsan_memcpy_memmove_metadata+0x989/0xd60 [ 112.271396] kmsan_memcpy_metadata+0xb/0x10 [ 112.275708] __msan_memcpy+0x58/0x70 [ 112.279429] ip6_compressed_string+0xbe/0x1490 [ 112.283998] ip6_addr_string+0x165/0x2b0 [ 112.288043] pointer+0x10f2/0x1660 [ 112.291562] vsnprintf+0x1c24/0x3230 [ 112.295267] snprintf+0x246/0x290 [ 112.298710] rpc_sockaddr2uaddr+0x4ec/0x730 [ 112.303019] rpcb_getport_async+0xfbe/0x1790 [ 112.307414] call_encode+0xba0/0x1650 [ 112.311213] call_allocate+0x1a5/0x920 [ 112.315088] call_refreshresult+0x15d/0x580 [ 112.319436] call_reserveresult+0x6b8/0x740 [ 112.323747] call_start+0x73c/0x790 [ 112.327361] __rpc_execute+0x968/0x1610 [ 112.331325] rpc_execute+0x437/0x6d0 [ 112.335026] rpc_run_task+0x8b8/0xbb0 [ 112.338815] rpc_create_xprt+0x5a3/0xd50 [ 112.342862] rpc_create+0xaa6/0xb30 [ 112.346603] nfs_create_rpc_client+0x723/0x920 [ 112.351172] nfs_init_client+0xb8/0x1d0 [ 112.355133] nfs_get_client+0x1487/0x16a0 [ 112.359297] nfs_create_server+0xb9a/0x3550 [ 112.363610] nfs_try_mount+0x1134/0x1550 [ 112.367661] nfs_fs_mount+0x36b2/0x3a70 [ 112.371625] legacy_get_tree+0x163/0x2d0 [ 112.375680] vfs_get_tree+0x1ae/0x810 [ 112.379465] do_mount+0x31d4/0x65f0 [ 112.383095] ksys_mount+0x32e/0x3d0 [ 112.386708] __se_sys_mount+0xe5/0x110 [ 112.390579] __x64_sys_mount+0x62/0x80 [ 112.394473] do_syscall_64+0xbc/0xf0 [ 112.398222] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 112.403390] [ 112.405004] Local variable description: ----addr@rpcb_getport_async [ 112.411403] Variable was created at: [ 112.415104] rpcb_getport_async+0xb3/0x1790 [ 112.419410] call_encode+0xba0/0x1650 [ 112.423191] ================================================================== [ 112.430530] Disabling lock debugging due to kernel taint [ 112.435960] Kernel panic - not syncing: panic_on_warn set ... [ 112.441859] CPU: 1 PID: 10632 Comm: syz-executor156 Tainted: G B 5.1.0-rc4+ #1 [ 112.450502] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 112.459837] Call Trace: [ 112.462435] dump_stack+0x173/0x1d0 [ 112.466074] panic+0x3d1/0xb01 [ 112.469292] kmsan_report+0x29a/0x2a0 [ 112.473094] __msan_warning+0x7a/0xf0 [ 112.476890] ip6_compressed_string+0x1de/0x1490 [ 112.481555] ? __msan_poison_alloca+0x1e0/0x290 [ 112.486222] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.491407] ip6_addr_string+0x165/0x2b0 [ 112.495473] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.500752] ? vsnprintf+0x1c24/0x3230 [ 112.504652] pointer+0x10f2/0x1660 [ 112.508197] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.513395] vsnprintf+0x1c24/0x3230 [ 112.517128] snprintf+0x246/0x290 [ 112.520592] ? depot_save_stack+0x388/0x4a0 [ 112.524919] ? rpcb_getport_async+0xfbe/0x1790 [ 112.529497] rpc_sockaddr2uaddr+0x4ec/0x730 [ 112.533823] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.539009] rpcb_getport_async+0xfbe/0x1790 [ 112.543449] ? _raw_spin_unlock_bh+0x4b/0x60 [ 112.547877] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.553061] ? rpcb_v4_register+0xcd0/0xcd0 [ 112.557372] call_encode+0xba0/0x1650 [ 112.561206] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.566426] call_allocate+0x1a5/0x920 [ 112.570323] call_refreshresult+0x15d/0x580 [ 112.574637] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.579824] call_reserveresult+0x6b8/0x740 [ 112.584148] call_start+0x73c/0x790 [ 112.587774] ? rpc_prepare_reply_pages+0x3b0/0x3b0 [ 112.592709] __rpc_execute+0x968/0x1610 [ 112.596706] ? rpc_prepare_reply_pages+0x3b0/0x3b0 [ 112.601646] rpc_execute+0x437/0x6d0 [ 112.605391] rpc_run_task+0x8b8/0xbb0 [ 112.609212] rpc_create_xprt+0x5a3/0xd50 [ 112.613282] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.618485] rpc_create+0xaa6/0xb30 [ 112.622120] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.627312] nfs_create_rpc_client+0x723/0x920 [ 112.631907] nfs_init_client+0xb8/0x1d0 [ 112.635876] ? nfs_init_server_rpcclient+0x430/0x430 [ 112.640971] nfs_get_client+0x1487/0x16a0 [ 112.645117] ? kmem_cache_alloc_trace+0x55d/0xb50 [ 112.649984] ? kmsan_internal_memset_shadow+0x104/0x3a0 [ 112.655369] nfs_create_server+0xb9a/0x3550 [ 112.659727] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.664905] ? nfs_fs_mount+0x36b2/0x3a70 [ 112.669061] nfs_try_mount+0x1134/0x1550 [ 112.673139] ? __msan_poison_alloca+0x1e0/0x290 [ 112.677928] ? try_module_get+0x5f/0x3f0 [ 112.681977] ? get_nfs_version+0x4c2/0x550 [ 112.686210] ? try_module_get+0x5f/0x3f0 [ 112.690267] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.695444] ? _raw_spin_lock+0x92/0x110 [ 112.699499] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 112.704676] ? get_nfs_version+0x4c2/0x550 [ 112.708908] nfs_fs_mount+0x36b2/0x3a70 [ 112.712914] ? nfs_auth_info_match+0x190/0x190 [ 112.717502] ? nfs_free_parsed_mount_data+0x1e0/0x1e0 [ 112.722716] ? nfs_fill_super+0xbf0/0xbf0 [ 112.726877] legacy_get_tree+0x163/0x2d0 [ 112.730928] ? init_once+0x570/0x570 [ 112.734648] ? legacy_parse_monolithic+0x2c0/0x2c0 [ 112.739570] vfs_get_tree+0x1ae/0x810 [ 112.743382] do_mount+0x31d4/0x65f0 [ 112.747196] ksys_mount+0x32e/0x3d0 [ 112.750852] __se_sys_mount+0xe5/0x110 [ 112.754740] __x64_sys_mount+0x62/0x80 [ 112.758641] do_syscall_64+0xbc/0xf0 [ 112.762379] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 112.767584] RIP: 0033:0x440259 [ 112.770770] 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 [ 112.789669] RSP: 002b:00007ffd251d6208 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 112.797386] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440259 [ 112.804648] RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000000 [ 112.811900] RBP: 00000000006ca018 R08: 000000002000a000 R09: 0000000000000000 [ 112.819157] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ae0 [ 112.826414] R13: 0000000000401b70 R14: 0000000000000000 R15: 0000000000000000 [ 112.834409] Kernel Offset: disabled [ 112.838038] Rebooting in 86400 seconds..