[ 96.655399] audit: type=1800 audit(1552805706.706:25): pid=10151 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 96.674733] audit: type=1800 audit(1552805706.716:26): pid=10151 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 96.694243] audit: type=1800 audit(1552805706.726:27): pid=10151 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. [ 97.968003] sshd (10216) used greatest stack depth: 54160 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.58' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 107.214499] ================================================================== [ 107.221948] BUG: KMSAN: uninit-value in ip6_compressed_string+0x1a9/0x1460 [ 107.228991] CPU: 0 PID: 10301 Comm: syz-executor602 Not tainted 5.0.0+ #15 [ 107.236022] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 107.245383] Call Trace: [ 107.247999] dump_stack+0x173/0x1d0 [ 107.251653] kmsan_report+0x12e/0x2a0 [ 107.255477] __msan_warning+0x82/0xf0 [ 107.259343] ip6_compressed_string+0x1a9/0x1460 [ 107.264037] ip6_addr_string+0x165/0x2b0 [ 107.268202] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.273421] pointer+0x10f2/0x1660 [ 107.276999] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.282260] vsnprintf+0xabf/0x30e0 [ 107.285949] snprintf+0x246/0x290 [ 107.289454] ? depot_save_stack+0x388/0x4a0 [ 107.293822] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.299061] rpc_sockaddr2uaddr+0x4ec/0x730 [ 107.303408] ? rpcb_getport_async+0xcf2/0x1790 [ 107.308002] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.313196] rpcb_getport_async+0xfbe/0x1790 [ 107.317652] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.322875] ? rpcb_v4_register+0xcd0/0xcd0 [ 107.327338] call_bind+0x1a8/0x260 [ 107.332352] ? call_encode+0xfe0/0xfe0 [ 107.336257] __rpc_execute+0x9c8/0x1670 [ 107.340262] ? call_encode+0xfe0/0xfe0 [ 107.344191] rpc_execute+0x437/0x6d0 [ 107.347957] rpc_run_task+0x8b8/0xbb0 [ 107.351815] rpc_create_xprt+0x5a3/0xd50 [ 107.355929] rpc_create+0xaa6/0xb30 [ 107.359579] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.364810] nfs_create_rpc_client+0x723/0x920 [ 107.369440] nfs_init_client+0xb8/0x1d0 [ 107.373467] ? nfs_init_server_rpcclient+0x3f0/0x3f0 [ 107.378761] nfs_get_client+0x1487/0x16a0 [ 107.382953] ? kmem_cache_alloc_trace+0x55d/0xb40 [ 107.387841] ? kmsan_internal_memset_shadow+0x14c/0x430 [ 107.393238] nfs_create_server+0xb8b/0x34c0 [ 107.397613] nfs3_create_server+0x70/0x370 [ 107.401864] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.407099] ? encode_sattr+0xb20/0xb20 [ 107.411070] nfs_try_mount+0x4de/0x14b0 [ 107.415063] ? depot_save_stack+0x388/0x4a0 [ 107.419398] ? __msan_poison_alloca+0x1f0/0x2a0 [ 107.424098] ? try_module_get+0x5f/0x3f0 [ 107.428202] ? get_nfs_version+0x4c2/0x550 [ 107.432486] ? try_module_get+0x5f/0x3f0 [ 107.436563] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.441791] nfs_fs_mount+0x365c/0x3a20 [ 107.445923] ? nfs_auth_info_match+0x190/0x190 [ 107.450523] ? nfs_free_parsed_mount_data+0x1e0/0x1e0 [ 107.455710] ? nfs_fill_super+0xbf0/0xbf0 [ 107.459877] ? init_once+0x570/0x570 [ 107.463612] mount_fs+0x254/0x740 [ 107.467104] vfs_kern_mount+0x231/0x8c0 [ 107.471181] do_mount+0x1137/0x65e0 [ 107.474842] ? kmsan_internal_check_memory+0xb41/0xb80 [ 107.480341] ksys_mount+0x32e/0x3d0 [ 107.484020] __se_sys_mount+0xe5/0x110 [ 107.487948] __x64_sys_mount+0x62/0x80 [ 107.491860] do_syscall_64+0xbc/0xf0 [ 107.495638] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 107.500836] RIP: 0033:0x4402d9 [ 107.504023] 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 [ 107.522931] RSP: 002b:00007ffec0bd2418 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 107.530652] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00000000004402d9 [ 107.537932] RDX: 000000002015bffc RSI: 00000000200000c0 RDI: 0000000000000000 [ 107.545580] RBP: 00000000006ca018 R08: 0000000020000000 R09: 0000000000000000 [ 107.552869] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b60 [ 107.560151] R13: 0000000000401bf0 R14: 0000000000000000 R15: 0000000000000000 [ 107.567436] [ 107.569060] Uninit was stored to memory at: [ 107.573414] kmsan_internal_chain_origin+0x134/0x230 [ 107.578534] kmsan_memcpy_memmove_metadata+0xc0b/0xfb0 [ 107.583824] kmsan_memcpy_metadata+0xb/0x10 [ 107.588145] __msan_memcpy+0x58/0x70 [ 107.591871] ip6_compressed_string+0x89/0x1460 [ 107.596481] ip6_addr_string+0x165/0x2b0 [ 107.600555] pointer+0x10f2/0x1660 [ 107.604087] vsnprintf+0xabf/0x30e0 [ 107.607705] snprintf+0x246/0x290 [ 107.611150] rpc_sockaddr2uaddr+0x4ec/0x730 [ 107.615462] rpcb_getport_async+0xfbe/0x1790 [ 107.619877] call_bind+0x1a8/0x260 [ 107.623466] __rpc_execute+0x9c8/0x1670 [ 107.627460] rpc_execute+0x437/0x6d0 [ 107.631203] rpc_run_task+0x8b8/0xbb0 [ 107.635017] rpc_create_xprt+0x5a3/0xd50 [ 107.639097] rpc_create+0xaa6/0xb30 [ 107.642738] nfs_create_rpc_client+0x723/0x920 [ 107.647344] nfs_init_client+0xb8/0x1d0 [ 107.651309] nfs_get_client+0x1487/0x16a0 [ 107.655451] nfs_create_server+0xb8b/0x34c0 [ 107.659765] nfs3_create_server+0x70/0x370 [ 107.663998] nfs_try_mount+0x4de/0x14b0 [ 107.667975] nfs_fs_mount+0x365c/0x3a20 [ 107.671956] mount_fs+0x254/0x740 [ 107.675439] vfs_kern_mount+0x231/0x8c0 [ 107.679466] do_mount+0x1137/0x65e0 [ 107.683105] ksys_mount+0x32e/0x3d0 [ 107.686753] __se_sys_mount+0xe5/0x110 [ 107.690637] __x64_sys_mount+0x62/0x80 [ 107.694547] do_syscall_64+0xbc/0xf0 [ 107.698279] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 107.703469] [ 107.705095] Local variable description: ----addr@rpcb_getport_async [ 107.711484] Variable was created at: [ 107.715192] rpcb_getport_async+0xb3/0x1790 [ 107.719519] call_bind+0x1a8/0x260 [ 107.723047] ================================================================== [ 107.730933] Disabling lock debugging due to kernel taint [ 107.736394] Kernel panic - not syncing: panic_on_warn set ... [ 107.742339] CPU: 0 PID: 10301 Comm: syz-executor602 Tainted: G B 5.0.0+ #15 [ 107.750740] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 107.760109] Call Trace: [ 107.762705] dump_stack+0x173/0x1d0 [ 107.766358] panic+0x3d1/0xb01 [ 107.769597] kmsan_report+0x293/0x2a0 [ 107.773423] __msan_warning+0x82/0xf0 [ 107.777260] ip6_compressed_string+0x1a9/0x1460 [ 107.781993] ip6_addr_string+0x165/0x2b0 [ 107.786086] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.791291] pointer+0x10f2/0x1660 [ 107.794857] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.800070] vsnprintf+0xabf/0x30e0 [ 107.803737] snprintf+0x246/0x290 [ 107.807194] ? depot_save_stack+0x388/0x4a0 [ 107.811521] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.816725] rpc_sockaddr2uaddr+0x4ec/0x730 [ 107.821063] ? rpcb_getport_async+0xcf2/0x1790 [ 107.825689] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.830947] rpcb_getport_async+0xfbe/0x1790 [ 107.835711] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.840953] ? rpcb_v4_register+0xcd0/0xcd0 [ 107.845329] call_bind+0x1a8/0x260 [ 107.848911] ? call_encode+0xfe0/0xfe0 [ 107.852795] __rpc_execute+0x9c8/0x1670 [ 107.856770] ? call_encode+0xfe0/0xfe0 [ 107.860661] rpc_execute+0x437/0x6d0 [ 107.864380] rpc_run_task+0x8b8/0xbb0 [ 107.868194] rpc_create_xprt+0x5a3/0xd50 [ 107.872292] rpc_create+0xaa6/0xb30 [ 107.875978] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.881187] nfs_create_rpc_client+0x723/0x920 [ 107.885799] nfs_init_client+0xb8/0x1d0 [ 107.889874] ? nfs_init_server_rpcclient+0x3f0/0x3f0 [ 107.894997] nfs_get_client+0x1487/0x16a0 [ 107.899163] ? kmem_cache_alloc_trace+0x55d/0xb40 [ 107.904010] ? kmsan_internal_memset_shadow+0x14c/0x430 [ 107.909387] nfs_create_server+0xb8b/0x34c0 [ 107.913761] nfs3_create_server+0x70/0x370 [ 107.917992] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.923217] ? encode_sattr+0xb20/0xb20 [ 107.927225] nfs_try_mount+0x4de/0x14b0 [ 107.931224] ? depot_save_stack+0x388/0x4a0 [ 107.935582] ? __msan_poison_alloca+0x1f0/0x2a0 [ 107.940273] ? try_module_get+0x5f/0x3f0 [ 107.944345] ? get_nfs_version+0x4c2/0x550 [ 107.948636] ? try_module_get+0x5f/0x3f0 [ 107.952708] ? kmsan_get_shadow_origin_ptr+0x70/0x490 [ 107.957915] nfs_fs_mount+0x365c/0x3a20 [ 107.961927] ? nfs_auth_info_match+0x190/0x190 [ 107.966509] ? nfs_free_parsed_mount_data+0x1e0/0x1e0 [ 107.971720] ? nfs_fill_super+0xbf0/0xbf0 [ 107.975925] ? init_once+0x570/0x570 [ 107.979650] mount_fs+0x254/0x740 [ 107.983146] vfs_kern_mount+0x231/0x8c0 [ 107.987143] do_mount+0x1137/0x65e0 [ 107.990782] ? kmsan_internal_check_memory+0xb41/0xb80 [ 107.996102] ksys_mount+0x32e/0x3d0 [ 107.999749] __se_sys_mount+0xe5/0x110 [ 108.003647] __x64_sys_mount+0x62/0x80 [ 108.007553] do_syscall_64+0xbc/0xf0 [ 108.011268] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 108.016467] RIP: 0033:0x4402d9 [ 108.019656] 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 [ 108.038577] RSP: 002b:00007ffec0bd2418 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 108.046296] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00000000004402d9 [ 108.053558] RDX: 000000002015bffc RSI: 00000000200000c0 RDI: 0000000000000000 [ 108.060814] RBP: 00000000006ca018 R08: 0000000020000000 R09: 0000000000000000 [ 108.068082] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b60 [ 108.075374] R13: 0000000000401bf0 R14: 0000000000000000 R15: 0000000000000000 [ 108.083401] Kernel Offset: disabled [ 108.087071] Rebooting in 86400 seconds..