linuxcontainer: fix nested mount configuration

README.cn.md

@@ -141,6 +141,8 @@ docker run -it --rm --privileged --shm-size=256m -p 5050:5050 criyle/executorser
 
 如果在容器的根目录存在 `/.env` 文件，那么这个文件会在容器创建时被载入。文件的每一行会作为环境变量的初始值加入到运行程序当中。
 
+如果之后指定的挂载点目标在之前的挂载点之下，那么需要保证之前的挂载点存在目标文件或者文件夹。
+
 ### 包
 
 - envexec: 核心逻辑包，在提供的环境中运行一个或多个程序

README.md

@@ -160,6 +160,8 @@ To customize mount points, please look at example `mount.yaml` file.
 
 If a file named `/.env` exists in the container rootfs, the container will load the file as environment variable line by line.
 
+If a bind mount is specifying a target within the previous mounted one, please ensure the target exists in the previous mount point.
+
 ### Packages
 
 - envexec: run single / group of programs in parallel within restricted environment and resource constraints

go.mod

@@ -4,7 +4,7 @@ go 1.18
 
 require (
 	github.com/creack/pty v1.1.18
-	github.com/criyle/go-sandbox v0.9.11
+	github.com/criyle/go-sandbox v0.9.12
 	github.com/elastic/go-seccomp-bpf v1.2.0
 	github.com/elastic/go-ucfg v0.8.6
 	github.com/gin-contrib/zap v0.0.2
@@ -17,8 +17,8 @@ require (
 	github.com/prometheus/client_golang v1.13.0
 	github.com/zsais/go-gin-prometheus v0.1.0
 	go.uber.org/zap v1.23.0
-	golang.org/x/crypto v0.0.0-20220824171710-5757bc0c5503
-	golang.org/x/net v0.0.0-20220822230855-b0a4917ee28c
+	golang.org/x/crypto v0.0.0-20220826181053-bd7e27e6170d
+	golang.org/x/net v0.0.0-20220826154423-83b083e8dc8b
 	golang.org/x/sync v0.0.0-20220819030929-7fc1605a5dde
 	golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64
 	google.golang.org/grpc v1.49.0
@@ -43,7 +43,7 @@ require (
 	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
-	github.com/pelletier/go-toml/v2 v2.0.4 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.5 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/prometheus/client_model v0.2.0 // indirect
 	github.com/prometheus/common v0.37.0 // indirect

go.sum

@@ -59,8 +59,8 @@ github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGX
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/creack/pty v1.1.18 h1:n56/Zwd5o6whRC5PMGretI4IdRLlmBXYNjScPaBgsbY=
 github.com/creack/pty v1.1.18/go.mod h1:MOBLtS5ELjhRRrroQr9kyvTxUAFNvYEK993ew/Vr4O4=
-github.com/criyle/go-sandbox v0.9.11 h1:3uuKsh/p9BDEgpOo6M7wmLbATf6efa5ZjlhuB92pg2g=
-github.com/criyle/go-sandbox v0.9.11/go.mod h1:wA7R1UPzl7JQRYdj6OrdYll+eGn3nt9VJWBSnURvSYc=
+github.com/criyle/go-sandbox v0.9.12 h1:vC0yQbyFGWpC0N7r5T/TJTlM4M9It8Oz80uzv8nJti0=
+github.com/criyle/go-sandbox v0.9.12/go.mod h1:DScKc3VnM1WaBN3lsAitm3YTu/osCX9uNyPcfuvOYhQ=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -219,8 +219,8 @@ github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRW
 github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
 github.com/opentracing/opentracing-go v1.1.0/go.mod h1:UkNAQd3GIcIGf0SeVgPpRdFStlNbqXla1AfSYxPUl2o=
-github.com/pelletier/go-toml/v2 v2.0.4 h1:MHHO+ZUPwPZQ6BmnnT81iQg5cuurp78CRH7rNsguSMk=
-github.com/pelletier/go-toml/v2 v2.0.4/go.mod h1:OMHamSCAODeSsVrwwvcJOaoN0LIUIaFVNZzmWyNfXas=
+github.com/pelletier/go-toml/v2 v2.0.5 h1:ipoSadvV8oGUjnUbMub59IDPPwfxF694nG/jwbMiyQg=
+github.com/pelletier/go-toml/v2 v2.0.5/go.mod h1:OMHamSCAODeSsVrwwvcJOaoN0LIUIaFVNZzmWyNfXas=
 github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@@ -311,8 +311,8 @@ golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
-golang.org/x/crypto v0.0.0-20220824171710-5757bc0c5503 h1:vJ2V3lFLg+bBhgroYuRfyN583UzVveQmIXjc8T/y3to=
-golang.org/x/crypto v0.0.0-20220824171710-5757bc0c5503/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/crypto v0.0.0-20220826181053-bd7e27e6170d h1:3qF+Z8Hkrw9sOhrFHti9TlB1Hkac1x+DNRkv0XQiFjo=
+golang.org/x/crypto v0.0.0-20220826181053-bd7e27e6170d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -378,8 +378,8 @@ golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qx
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/net v0.0.0-20220225172249-27dd8689420f/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
-golang.org/x/net v0.0.0-20220822230855-b0a4917ee28c h1:JVAXQ10yGGVbSyoer5VILysz6YKjdNT2bsvlayjqhes=
-golang.org/x/net v0.0.0-20220822230855-b0a4917ee28c/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
+golang.org/x/net v0.0.0-20220826154423-83b083e8dc8b h1:ZmngSVLe/wycRns9MKikG9OWIEjGcGAkacif7oYQaUY=
+golang.org/x/net v0.0.0-20220826154423-83b083e8dc8b/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=