[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 68.128608] audit: type=1800 audit(1550575643.187:25): pid=9252 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 68.147689] audit: type=1800 audit(1550575643.197:26): pid=9252 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 68.167037] audit: type=1800 audit(1550575643.207:27): pid=9252 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 '10.128.10.34' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 79.696783] ================================================================== [ 79.704285] BUG: KMSAN: uninit-value in ip6_compressed_string+0x1a9/0x1460 [ 79.711378] CPU: 1 PID: 9403 Comm: syz-executor766 Not tainted 5.0.0-rc1+ #9 [ 79.718626] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 79.727997] Call Trace: [ 79.730574] dump_stack+0x173/0x1d0 [ 79.734398] kmsan_report+0x12e/0x2a0 [ 79.738187] __msan_warning+0x82/0xf0 [ 79.741988] ip6_compressed_string+0x1a9/0x1460 [ 79.746644] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 79.751835] ip6_addr_string+0x165/0x2b0 [ 79.755888] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 79.761066] pointer+0x10f2/0x1660 [ 79.764595] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 79.769771] vsnprintf+0xabf/0x30e0 [ 79.773580] snprintf+0x246/0x290 [ 79.777020] ? depot_save_stack+0x388/0x4a0 [ 79.781336] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 79.786512] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 79.791685] rpc_sockaddr2uaddr+0x4ec/0x730 [ 79.796038] ? rpcb_getport_async+0xcf2/0x1790 [ 79.800602] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 79.805775] rpcb_getport_async+0xfbe/0x1790 [ 79.810195] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 79.815376] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 79.820548] ? rpcb_v4_register+0xcd0/0xcd0 [ 79.824849] call_bind+0x1a8/0x260 [ 79.828370] ? call_encode+0x1050/0x1050 [ 79.832413] __rpc_execute+0x9c8/0x1670 [ 79.836372] ? call_encode+0x1050/0x1050 [ 79.840417] rpc_execute+0x437/0x6d0 [ 79.844116] rpc_run_task+0x8b8/0xbb0 [ 79.847905] rpc_create_xprt+0x5a3/0xd50 [ 79.851956] rpc_create+0xaa6/0xb30 [ 79.855573] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 79.860745] nfs_create_rpc_client+0x723/0x920 [ 79.865318] nfs_init_client+0xb8/0x1d0 [ 79.869287] ? nfs_init_server_rpcclient+0x3f0/0x3f0 [ 79.874365] nfs_get_client+0x1487/0x16a0 [ 79.878494] ? kmem_cache_alloc_trace+0x55d/0xb40 [ 79.883330] nfs_create_server+0xb8b/0x34c0 [ 79.887645] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 79.892815] ? nfs_free_server+0x2c0/0x2c0 [ 79.897045] nfs_try_mount+0x4de/0x14b0 [ 79.901003] ? depot_save_stack+0x388/0x4a0 [ 79.905303] ? __msan_poison_alloca+0x1f0/0x2a0 [ 79.909955] ? try_module_get+0x5f/0x3f0 [ 79.914001] ? get_nfs_version+0x4c2/0x550 [ 79.918227] ? try_module_get+0x5f/0x3f0 [ 79.922276] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 79.927451] nfs_fs_mount+0x3618/0x39e0 [ 79.931410] ? nfs_auth_info_match+0x190/0x190 [ 79.935975] ? nfs_free_parsed_mount_data+0x1e0/0x1e0 [ 79.941183] ? nfs_fill_super+0xbf0/0xbf0 [ 79.945418] ? init_once+0x570/0x570 [ 79.949111] mount_fs+0x254/0x740 [ 79.952552] vfs_kern_mount+0x231/0x8c0 [ 79.956517] do_mount+0x1137/0x65e0 [ 79.960216] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 79.965399] ksys_mount+0x32e/0x3d0 [ 79.969016] __se_sys_mount+0xe5/0x110 [ 79.972989] __x64_sys_mount+0x62/0x80 [ 79.976878] do_syscall_64+0xbc/0xf0 [ 79.980572] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 79.985752] RIP: 0033:0x440109 [ 79.988926] 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 [ 80.007804] RSP: 002b:00007fff88e4a3d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 80.015492] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440109 [ 80.022743] RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000000 [ 80.030111] RBP: 00000000006ca018 R08: 000000002000a000 R09: 0000000000000000 [ 80.037361] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401990 [ 80.044624] R13: 0000000000401a20 R14: 0000000000000000 R15: 0000000000000000 [ 80.051973] [ 80.053576] Uninit was stored to memory at: [ 80.057880] kmsan_internal_chain_origin+0x134/0x230 [ 80.062967] kmsan_memcpy_memmove_metadata+0xcf2/0xf10 [ 80.068227] kmsan_memcpy_metadata+0xb/0x10 [ 80.072617] __msan_memcpy+0x58/0x70 [ 80.076319] ip6_compressed_string+0x89/0x1460 [ 80.080881] ip6_addr_string+0x165/0x2b0 [ 80.084921] pointer+0x10f2/0x1660 [ 80.088445] vsnprintf+0xabf/0x30e0 [ 80.092053] snprintf+0x246/0x290 [ 80.095487] rpc_sockaddr2uaddr+0x4ec/0x730 [ 80.099789] rpcb_getport_async+0xfbe/0x1790 [ 80.104206] call_bind+0x1a8/0x260 [ 80.107735] __rpc_execute+0x9c8/0x1670 [ 80.111687] rpc_execute+0x437/0x6d0 [ 80.115400] rpc_run_task+0x8b8/0xbb0 [ 80.119177] rpc_create_xprt+0x5a3/0xd50 [ 80.123221] rpc_create+0xaa6/0xb30 [ 80.126934] nfs_create_rpc_client+0x723/0x920 [ 80.131502] nfs_init_client+0xb8/0x1d0 [ 80.135498] nfs_get_client+0x1487/0x16a0 [ 80.139632] nfs_create_server+0xb8b/0x34c0 [ 80.143935] nfs_try_mount+0x4de/0x14b0 [ 80.147888] nfs_fs_mount+0x3618/0x39e0 [ 80.151846] mount_fs+0x254/0x740 [ 80.155281] vfs_kern_mount+0x231/0x8c0 [ 80.159247] do_mount+0x1137/0x65e0 [ 80.162857] ksys_mount+0x32e/0x3d0 [ 80.166466] __se_sys_mount+0xe5/0x110 [ 80.170334] __x64_sys_mount+0x62/0x80 [ 80.174201] do_syscall_64+0xbc/0xf0 [ 80.177897] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 80.183063] [ 80.184667] Local variable description: ----addr@rpcb_getport_async [ 80.191047] Variable was created at: [ 80.194741] rpcb_getport_async+0xb3/0x1790 [ 80.199044] call_bind+0x1a8/0x260 [ 80.202559] ================================================================== [ 80.209904] Disabling lock debugging due to kernel taint [ 80.215333] Kernel panic - not syncing: panic_on_warn set ... [ 80.221200] CPU: 1 PID: 9403 Comm: syz-executor766 Tainted: G B 5.0.0-rc1+ #9 [ 80.229755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.239088] Call Trace: [ 80.241668] dump_stack+0x173/0x1d0 [ 80.245281] panic+0x3d1/0xb01 [ 80.248474] kmsan_report+0x293/0x2a0 [ 80.252262] __msan_warning+0x82/0xf0 [ 80.256047] ip6_compressed_string+0x1a9/0x1460 [ 80.260701] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 80.265882] ip6_addr_string+0x165/0x2b0 [ 80.269933] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 80.275107] pointer+0x10f2/0x1660 [ 80.278636] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 80.283819] vsnprintf+0xabf/0x30e0 [ 80.287446] snprintf+0x246/0x290 [ 80.290889] ? depot_save_stack+0x388/0x4a0 [ 80.295225] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 80.300398] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 80.305584] rpc_sockaddr2uaddr+0x4ec/0x730 [ 80.309899] ? rpcb_getport_async+0xcf2/0x1790 [ 80.314468] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 80.319641] rpcb_getport_async+0xfbe/0x1790 [ 80.324055] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 80.329325] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 80.334500] ? rpcb_v4_register+0xcd0/0xcd0 [ 80.338808] call_bind+0x1a8/0x260 [ 80.342334] ? call_encode+0x1050/0x1050 [ 80.346385] __rpc_execute+0x9c8/0x1670 [ 80.350343] ? call_encode+0x1050/0x1050 [ 80.354392] rpc_execute+0x437/0x6d0 [ 80.358095] rpc_run_task+0x8b8/0xbb0 [ 80.361886] rpc_create_xprt+0x5a3/0xd50 [ 80.365945] rpc_create+0xaa6/0xb30 [ 80.369565] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 80.374746] nfs_create_rpc_client+0x723/0x920 [ 80.379427] nfs_init_client+0xb8/0x1d0 [ 80.383387] ? nfs_init_server_rpcclient+0x3f0/0x3f0 [ 80.388573] nfs_get_client+0x1487/0x16a0 [ 80.392714] ? kmem_cache_alloc_trace+0x55d/0xb40 [ 80.397554] nfs_create_server+0xb8b/0x34c0 [ 80.401872] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 80.407068] ? nfs_free_server+0x2c0/0x2c0 [ 80.411285] nfs_try_mount+0x4de/0x14b0 [ 80.415242] ? depot_save_stack+0x388/0x4a0 [ 80.419548] ? __msan_poison_alloca+0x1f0/0x2a0 [ 80.424203] ? try_module_get+0x5f/0x3f0 [ 80.428262] ? get_nfs_version+0x4c2/0x550 [ 80.432498] ? try_module_get+0x5f/0x3f0 [ 80.436542] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 80.441725] nfs_fs_mount+0x3618/0x39e0 [ 80.445723] ? nfs_auth_info_match+0x190/0x190 [ 80.450285] ? nfs_free_parsed_mount_data+0x1e0/0x1e0 [ 80.455453] ? nfs_fill_super+0xbf0/0xbf0 [ 80.459586] ? init_once+0x570/0x570 [ 80.463282] mount_fs+0x254/0x740 [ 80.466732] vfs_kern_mount+0x231/0x8c0 [ 80.470692] do_mount+0x1137/0x65e0 [ 80.474306] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 80.479486] ksys_mount+0x32e/0x3d0 [ 80.483103] __se_sys_mount+0xe5/0x110 [ 80.486980] __x64_sys_mount+0x62/0x80 [ 80.490857] do_syscall_64+0xbc/0xf0 [ 80.494568] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 80.500259] RIP: 0033:0x440109 [ 80.503536] 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 [ 80.522425] RSP: 002b:00007fff88e4a3d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 80.530119] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440109 [ 80.537369] RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000000 [ 80.544617] RBP: 00000000006ca018 R08: 000000002000a000 R09: 0000000000000000 [ 80.551864] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401990 [ 80.559116] R13: 0000000000401a20 R14: 0000000000000000 R15: 0000000000000000 [ 80.567468] Kernel Offset: disabled [ 80.571092] Rebooting in 86400 seconds..