Merge pull request #125620 from ritster/mountinfo-dep-update

version update: github.com/moby/sys/mountinfo from v0.6.2 -> v0.7.1

go.mod

@@ -175,7 +175,7 @@ require (
 	github.com/mistifyio/go-zfs v2.1.2-0.20190413222219-f784269be439+incompatible // indirect
 	github.com/mitchellh/go-wordwrap v1.0.1 // indirect
 	github.com/moby/spdystream v0.2.0 // indirect
-	github.com/moby/sys/mountinfo v0.6.2 // indirect
+	github.com/moby/sys/mountinfo v0.7.1 // indirect
 	github.com/moby/term v0.5.0 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect

go.sum

@@ -509,8 +509,8 @@ github.com/moby/ipvs v1.1.0 h1:ONN4pGaZQgAx+1Scz5RvWV4Q7Gb+mvfRh3NsPS+1XQQ=
 github.com/moby/ipvs v1.1.0/go.mod h1:4VJMWuf098bsUMmZEiD4Tjk/O7mOn3l1PTD3s4OoYAs=
 github.com/moby/spdystream v0.2.0 h1:cjW1zVyyoiM0T7b6UoySUFqzXMoqRckQtXwGPiBhOM8=
 github.com/moby/spdystream v0.2.0/go.mod h1:f7i0iNDQJ059oMTcWxx8MA/zKFIuD/lY+0GqbN2Wy8c=
-github.com/moby/sys/mountinfo v0.6.2 h1:BzJjoreD5BMFNmD9Rus6gdd1pLuecOFPt8wC+Vygl78=
+github.com/moby/sys/mountinfo v0.7.1 h1:/tTvQaSJRr2FshkhXiIpux6fQ2Zvc4j7tAhMTStAG2g=
-github.com/moby/sys/mountinfo v0.6.2/go.mod h1:IJb6JQeOklcdMU9F5xQ8ZALD+CUr5VlGpwtX+VE0rpI=
+github.com/moby/sys/mountinfo v0.7.1/go.mod h1:IJb6JQeOklcdMU9F5xQ8ZALD+CUr5VlGpwtX+VE0rpI=
 github.com/moby/term v0.5.0 h1:xt8Q1nalod/v7BqbG21f8mQPqH+xAaC9C3N3wfWbVP0=
 github.com/moby/term v0.5.0/go.mod h1:8FzsFHVUBGZdbDsJw/ot+X+d5HLUbvklYLJ9uGfcI3Y=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=

staging/src/k8s.io/mount-utils/go.mod

@@ -5,7 +5,7 @@ module k8s.io/mount-utils
 go 1.22.0
 
 require (
-	github.com/moby/sys/mountinfo v0.6.2
+	github.com/moby/sys/mountinfo v0.7.1
 	github.com/opencontainers/runc v1.1.13
 	github.com/stretchr/testify v1.8.4
 	golang.org/x/sys v0.20.0

staging/src/k8s.io/mount-utils/go.sum

@@ -23,8 +23,8 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
-github.com/moby/sys/mountinfo v0.6.2 h1:BzJjoreD5BMFNmD9Rus6gdd1pLuecOFPt8wC+Vygl78=
+github.com/moby/sys/mountinfo v0.7.1 h1:/tTvQaSJRr2FshkhXiIpux6fQ2Zvc4j7tAhMTStAG2g=
-github.com/moby/sys/mountinfo v0.6.2/go.mod h1:IJb6JQeOklcdMU9F5xQ8ZALD+CUr5VlGpwtX+VE0rpI=
+github.com/moby/sys/mountinfo v0.7.1/go.mod h1:IJb6JQeOklcdMU9F5xQ8ZALD+CUr5VlGpwtX+VE0rpI=
 github.com/mrunalp/fileutils v0.5.1/go.mod h1:M1WthSahJixYnrXQl/DFQuteStB1weuxD2QJNHXfbSQ=
 github.com/opencontainers/runc v1.1.13 h1:98S2srgG9vw0zWcDpFMn5TRrh8kLxa/5OFUstuUhmRs=
 github.com/opencontainers/runc v1.1.13/go.mod h1:R016aXacfp/gwQBYw2FDGa9m+n6atbLWrYY8hNMT/sA=

vendor/github.com/moby/sys/mountinfo/mountinfo_linux.go

@@ -5,15 +5,19 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"runtime"
 	"strconv"
 	"strings"
+	"sync"
+
+	"golang.org/x/sys/unix"
 )
 
 // GetMountsFromReader retrieves a list of mounts from the
 // reader provided, with an optional filter applied (use nil
 // for no filter). This can be useful in tests or benchmarks
 // that provide fake mountinfo data, or when a source other
-// than /proc/self/mountinfo needs to be read from.
+// than /proc/thread-self/mountinfo needs to be read from.
 //
 // This function is Linux-specific.
 func GetMountsFromReader(r io.Reader, filter FilterFunc) ([]*Info, error) {
@@ -127,8 +131,40 @@ func GetMountsFromReader(r io.Reader, filter FilterFunc) ([]*Info, error) {
 	return out, nil
 }
 
-func parseMountTable(filter FilterFunc) ([]*Info, error) {
+var (
-	f, err := os.Open("/proc/self/mountinfo")
+	haveProcThreadSelf     bool
+	haveProcThreadSelfOnce sync.Once
+)
+
+func parseMountTable(filter FilterFunc) (_ []*Info, err error) {
+	haveProcThreadSelfOnce.Do(func() {
+		_, err := os.Stat("/proc/thread-self/mountinfo")
+		haveProcThreadSelf = err == nil
+	})
+
+	// We need to lock ourselves to the current OS thread in order to make sure
+	// that the thread referenced by /proc/thread-self stays alive until we
+	// finish parsing the file.
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	var f *os.File
+	if haveProcThreadSelf {
+		f, err = os.Open("/proc/thread-self/mountinfo")
+	} else {
+		// On pre-3.17 kernels (such as CentOS 7), we don't have
+		// /proc/thread-self/ so we need to manually construct
+		// /proc/self/task/<tid>/ as a fallback.
+		f, err = os.Open("/proc/self/task/" + strconv.Itoa(unix.Gettid()) + "/mountinfo")
+		if os.IsNotExist(err) {
+			// If /proc/self/task/... failed, it means that our active pid
+			// namespace doesn't match the pid namespace of the /proc mount. In
+			// this case we just have to make do with /proc/self, since there
+			// is no other way of figuring out our tid in a parent pid
+			// namespace on pre-3.17 kernels.
+			f, err = os.Open("/proc/self/mountinfo")
+		}
+	}
 	if err != nil {
 		return nil, err
 	}

vendor/modules.txt

@@ -426,7 +426,7 @@ github.com/moby/ipvs
 ## explicit; go 1.13
 github.com/moby/spdystream
 github.com/moby/spdystream/spdy
-# github.com/moby/sys/mountinfo v0.6.2
+# github.com/moby/sys/mountinfo v0.7.1
 ## explicit; go 1.16
 github.com/moby/sys/mountinfo
 # github.com/moby/term v0.5.0