[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 64.379289] audit: type=1800 audit(1543120898.442:25): pid=6611 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 64.398690] audit: type=1800 audit(1543120898.442:26): pid=6611 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 64.418198] audit: type=1800 audit(1543120898.472:27): pid=6611 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 '10.128.0.84' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.030201] ================================================================== [ 77.037591] BUG: KMSAN: uninit-value in ip6_compressed_string+0x1a9/0x1460 [ 77.044597] CPU: 1 PID: 6762 Comm: syz-executor445 Not tainted 4.20.0-rc3+ #95 [ 77.051941] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.061289] Call Trace: [ 77.063875] dump_stack+0x32d/0x480 [ 77.067520] ? ip6_compressed_string+0x1a9/0x1460 [ 77.072375] kmsan_report+0x12c/0x290 [ 77.076181] __msan_warning+0x76/0xc0 [ 77.079985] ip6_compressed_string+0x1a9/0x1460 [ 77.084660] ? ip6_addr_string+0xb5/0x2b0 [ 77.088807] ip6_addr_string+0x165/0x2b0 [ 77.092873] ? pointer+0xb1/0x1520 [ 77.096408] ? vsnprintf+0xabf/0x3110 [ 77.100205] pointer+0x110e/0x1520 [ 77.103763] vsnprintf+0xabf/0x3110 [ 77.107409] snprintf+0x246/0x290 [ 77.110880] ? rpcb_getport_async+0x10d4/0x1770 [ 77.115549] rpc_sockaddr2uaddr+0x3aa/0x6f0 [ 77.119871] ? __kmalloc+0x14c/0x4d0 [ 77.123583] ? rpcb_getport_async+0xe01/0x1770 [ 77.128166] rpcb_getport_async+0x10d4/0x1770 [ 77.132696] ? rpcproc_encode_null+0x10/0x10 [ 77.137111] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 77.142562] ? call_encode+0xee8/0xf20 [ 77.146448] ? rpcb_v4_register+0xcf0/0xcf0 [ 77.150765] call_bind+0x1a8/0x260 [ 77.154303] ? call_encode+0xf20/0xf20 [ 77.158187] __rpc_execute+0xacb/0x19c0 [ 77.162186] ? call_encode+0xf20/0xf20 [ 77.166098] rpc_execute+0x6ad/0x940 [ 77.169817] rpc_run_task+0xc42/0xe70 [ 77.173628] rpc_create_xprt+0x6a9/0xe80 [ 77.177702] rpc_create+0xa78/0xb30 [ 77.181347] nfs_create_rpc_client+0x752/0x860 [ 77.185945] nfs_init_client+0xb8/0x1d0 [ 77.189915] ? nfs_init_server_rpcclient+0x3f0/0x3f0 [ 77.195027] nfs_get_client+0x14fc/0x1720 [ 77.199200] nfs_create_server+0xbd7/0x3290 [ 77.203554] ? nfs_try_mount+0x108/0x14b0 [ 77.207693] ? nfs_fs_mount+0x393d/0x4000 [ 77.211835] ? nfs_free_server+0x2c0/0x2c0 [ 77.216066] nfs_try_mount+0x4de/0x14b0 [ 77.220061] ? try_module_get+0x5f/0x3f0 [ 77.224129] ? get_nfs_version+0x4c2/0x550 [ 77.228366] nfs_fs_mount+0x393d/0x4000 [ 77.232368] ? nfs_auth_info_match+0x180/0x180 [ 77.236958] ? nfs_parse_mount_options+0x51a0/0x51a0 [ 77.242103] ? nfs_fill_super+0xa70/0xa70 [ 77.246265] ? init_once+0x970/0x970 [ 77.249988] mount_fs+0x282/0x790 [ 77.253452] vfs_kern_mount+0x231/0x8c0 [ 77.257432] do_mount+0xd1f/0x5ac0 [ 77.260988] ksys_mount+0x32e/0x3d0 [ 77.264625] __se_sys_mount+0xe5/0x110 [ 77.268526] __x64_sys_mount+0x62/0x80 [ 77.272411] do_syscall_64+0xcf/0x110 [ 77.276208] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 77.281404] RIP: 0033:0x4401c9 [ 77.284606] 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 [ 77.303535] RSP: 002b:00007fff7eefaf48 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 77.311248] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00000000004401c9 [ 77.318514] RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000000 [ 77.325780] RBP: 00000000006ca018 R08: 000000002000a000 R09: 0000000000000000 [ 77.333041] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000401a50 [ 77.340315] R13: 0000000000401ae0 R14: 0000000000000000 R15: 0000000000000000 [ 77.347585] [ 77.349197] Uninit was stored to memory at: [ 77.353519] kmsan_internal_chain_origin+0x13d/0x240 [ 77.358612] kmsan_memcpy_memmove_metadata+0x1a9/0xf70 [ 77.363880] kmsan_memcpy_metadata+0xb/0x10 [ 77.368190] __msan_memcpy+0x61/0x70 [ 77.371909] ip6_compressed_string+0x89/0x1460 [ 77.376482] ip6_addr_string+0x165/0x2b0 [ 77.380551] pointer+0x110e/0x1520 [ 77.384084] vsnprintf+0xabf/0x3110 [ 77.387700] snprintf+0x246/0x290 [ 77.391142] rpc_sockaddr2uaddr+0x3aa/0x6f0 [ 77.395454] rpcb_getport_async+0x10d4/0x1770 [ 77.399938] call_bind+0x1a8/0x260 [ 77.403476] __rpc_execute+0xacb/0x19c0 [ 77.407442] rpc_execute+0x6ad/0x940 [ 77.411148] rpc_run_task+0xc42/0xe70 [ 77.414940] rpc_create_xprt+0x6a9/0xe80 [ 77.418993] rpc_create+0xa78/0xb30 [ 77.422618] nfs_create_rpc_client+0x752/0x860 [ 77.427190] nfs_init_client+0xb8/0x1d0 [ 77.431157] nfs_get_client+0x14fc/0x1720 [ 77.435295] nfs_create_server+0xbd7/0x3290 [ 77.439608] nfs_try_mount+0x4de/0x14b0 [ 77.443573] nfs_fs_mount+0x393d/0x4000 [ 77.447539] mount_fs+0x282/0x790 [ 77.450981] vfs_kern_mount+0x231/0x8c0 [ 77.454949] do_mount+0xd1f/0x5ac0 [ 77.458492] ksys_mount+0x32e/0x3d0 [ 77.462145] __se_sys_mount+0xe5/0x110 [ 77.466049] __x64_sys_mount+0x62/0x80 [ 77.469925] do_syscall_64+0xcf/0x110 [ 77.473717] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 77.478896] [ 77.480511] Local variable description: ----addr@rpcb_getport_async [ 77.486900] Variable was created at: [ 77.490623] rpcb_getport_async+0xb3/0x1770 [ 77.494938] call_bind+0x1a8/0x260 [ 77.498462] ================================================================== [ 77.505822] Disabling lock debugging due to kernel taint [ 77.511292] Kernel panic - not syncing: panic_on_warn set ... [ 77.517187] CPU: 1 PID: 6762 Comm: syz-executor445 Tainted: G B 4.20.0-rc3+ #95 [ 77.525927] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.535355] Call Trace: [ 77.537942] dump_stack+0x32d/0x480 [ 77.541575] panic+0x624/0xc08 [ 77.544802] kmsan_report+0x28a/0x290 [ 77.548624] __msan_warning+0x76/0xc0 [ 77.552469] ip6_compressed_string+0x1a9/0x1460 [ 77.557141] ? ip6_addr_string+0xb5/0x2b0 [ 77.561306] ip6_addr_string+0x165/0x2b0 [ 77.565389] ? pointer+0xb1/0x1520 [ 77.568954] ? vsnprintf+0xabf/0x3110 [ 77.572778] pointer+0x110e/0x1520 [ 77.576330] vsnprintf+0xabf/0x3110 [ 77.579973] snprintf+0x246/0x290 [ 77.583443] ? rpcb_getport_async+0x10d4/0x1770 [ 77.588112] rpc_sockaddr2uaddr+0x3aa/0x6f0 [ 77.593043] ? __kmalloc+0x14c/0x4d0 [ 77.596758] ? rpcb_getport_async+0xe01/0x1770 [ 77.601342] rpcb_getport_async+0x10d4/0x1770 [ 77.605868] ? rpcproc_encode_null+0x10/0x10 [ 77.610270] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 77.615713] ? call_encode+0xee8/0xf20 [ 77.619606] ? rpcb_v4_register+0xcf0/0xcf0 [ 77.623927] call_bind+0x1a8/0x260 [ 77.627467] ? call_encode+0xf20/0xf20 [ 77.631351] __rpc_execute+0xacb/0x19c0 [ 77.635343] ? call_encode+0xf20/0xf20 [ 77.639237] rpc_execute+0x6ad/0x940 [ 77.642964] rpc_run_task+0xc42/0xe70 [ 77.646793] rpc_create_xprt+0x6a9/0xe80 [ 77.650871] rpc_create+0xa78/0xb30 [ 77.654522] nfs_create_rpc_client+0x752/0x860 [ 77.659132] nfs_init_client+0xb8/0x1d0 [ 77.663106] ? nfs_init_server_rpcclient+0x3f0/0x3f0 [ 77.668201] nfs_get_client+0x14fc/0x1720 [ 77.672369] nfs_create_server+0xbd7/0x3290 [ 77.676745] ? nfs_try_mount+0x108/0x14b0 [ 77.680887] ? nfs_fs_mount+0x393d/0x4000 [ 77.685036] ? nfs_free_server+0x2c0/0x2c0 [ 77.689266] nfs_try_mount+0x4de/0x14b0 [ 77.693293] ? try_module_get+0x5f/0x3f0 [ 77.697358] ? get_nfs_version+0x4c2/0x550 [ 77.701593] nfs_fs_mount+0x393d/0x4000 [ 77.705574] ? nfs_auth_info_match+0x180/0x180 [ 77.710166] ? nfs_parse_mount_options+0x51a0/0x51a0 [ 77.715263] ? nfs_fill_super+0xa70/0xa70 [ 77.719414] ? init_once+0x970/0x970 [ 77.723130] mount_fs+0x282/0x790 [ 77.726593] vfs_kern_mount+0x231/0x8c0 [ 77.730571] do_mount+0xd1f/0x5ac0 [ 77.734129] ksys_mount+0x32e/0x3d0 [ 77.737766] __se_sys_mount+0xe5/0x110 [ 77.741654] __x64_sys_mount+0x62/0x80 [ 77.745576] do_syscall_64+0xcf/0x110 [ 77.749375] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 77.754560] RIP: 0033:0x4401c9 [ 77.757752] 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 [ 77.776645] RSP: 002b:00007fff7eefaf48 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 77.784345] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00000000004401c9 [ 77.791604] RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000000 [ 77.798879] RBP: 00000000006ca018 R08: 000000002000a000 R09: 0000000000000000 [ 77.806142] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000401a50 [ 77.813403] R13: 0000000000401ae0 R14: 0000000000000000 R15: 0000000000000000 [ 77.821629] Kernel Offset: disabled [ 77.825268] Rebooting in 86400 seconds..