[release-1.33] Bump c/storage to v1.51.2, fixes CVE-2024-9676

As the title says.  Addresses CVE-2024-9676

Fixes: https://issues.redhat.com/browse/RHEL-61853, https://issues.redhat.com/browse/RHEL-61860

[NO NEW TESTS NEEDED]

Signed-off-by: tomsweeneyredhat <tsweeney@redhat.com>

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/containers/image/v5 v5.29.4
 	github.com/containers/luksy v0.0.0-20231030195837-b5a7f79da98b
 	github.com/containers/ocicrypt v1.1.10
-	github.com/containers/storage v1.51.0
+	github.com/containers/storage v1.51.2
 	github.com/cyphar/filepath-securejoin v0.2.4
 	github.com/docker/distribution v2.8.3+incompatible
 	github.com/docker/docker v24.0.7+incompatible

go.sum

@@ -64,8 +64,8 @@ github.com/containers/luksy v0.0.0-20231030195837-b5a7f79da98b h1:8XvNAm+g7ivwPU
 github.com/containers/luksy v0.0.0-20231030195837-b5a7f79da98b/go.mod h1:menB9p4o5HckgcLW6cO0+dl6+axkVmSqKlrNcratsh4=
 github.com/containers/ocicrypt v1.1.10 h1:r7UR6o8+lyhkEywetubUUgcKFjOWOaWz8cEBrCPX0ic=
 github.com/containers/ocicrypt v1.1.10/go.mod h1:YfzSSr06PTHQwSTUKqDSjish9BeW1E4HUmreluQcMd8=
-github.com/containers/storage v1.51.0 h1:AowbcpiWXzAjHosKz7MKvPEqpyX+ryZA/ZurytRrFNA=
-github.com/containers/storage v1.51.0/go.mod h1:ybl8a3j1PPtpyaEi/5A6TOFs+5TrEyObeKJzVtkUlfc=
+github.com/containers/storage v1.51.2 h1:Xw8p1AG1A+Nh6dCsb1UOB3YKF5uzlCkI3uAP4fsFup4=
+github.com/containers/storage v1.51.2/go.mod h1:ybl8a3j1PPtpyaEi/5A6TOFs+5TrEyObeKJzVtkUlfc=
 github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/creack/pty v1.1.18 h1:n56/Zwd5o6whRC5PMGretI4IdRLlmBXYNjScPaBgsbY=

vendor/github.com/containers/storage/.cirrus.yml

@@ -119,7 +119,7 @@ lint_task:
     env:
         CIRRUS_WORKING_DIR: "/go/src/github.com/containers/storage"
     container:
-        image: golang
+        image: golang:1.19
     modules_cache:
         fingerprint_script: cat go.sum
         folder: $GOPATH/pkg/mod

vendor/github.com/containers/storage/VERSION

@@ -1 +1 @@
-1.51.0
+1.51.2

vendor/github.com/containers/storage/drivers/overlay/overlay.go

@@ -1670,13 +1670,21 @@ func (d *Driver) get(id string, disableShifting bool, options graphdriver.MountO
 	}
 
 	if err := idtools.MkdirAllAs(diffDir, perms, rootUID, rootGID); err != nil {
-		return "", err
+		if !inAdditionalStore {
+			return "", err
+		}
+		// if it is in an additional store, do not fail if the directory already exists
+		if _, err2 := os.Stat(diffDir); err2 != nil {
+			return "", err
+		}
 	}
 
 	mergedDir := path.Join(workDirBase, "merged")
-	// Create the driver merged dir
-	if err := idtools.MkdirAs(mergedDir, 0o700, rootUID, rootGID); err != nil && !os.IsExist(err) {
-		return "", err
+	// Attempt to create the merged dir only if it doesn't exist.
+	if _, err := os.Stat(mergedDir); err != nil && os.IsNotExist(err) {
+		if err := idtools.MkdirAs(mergedDir, 0o700, rootUID, rootGID); err != nil && !os.IsExist(err) {
+			return "", err
+		}
 	}
 	if count := d.ctr.Increment(mergedDir); count > 1 {
 		return mergedDir, nil
@@ -1841,7 +1849,7 @@ func (d *Driver) get(id string, disableShifting bool, options graphdriver.MountO
 
 // Put unmounts the mount path created for the give id.
 func (d *Driver) Put(id string) error {
-	dir := d.dir(id)
+	dir, _, inAdditionalStore := d.dir2(id)
 	if _, err := os.Stat(dir); err != nil {
 		return err
 	}
@@ -1902,11 +1910,27 @@ func (d *Driver) Put(id string) error {
 		}
 	}
 
-	if err := unix.Rmdir(mountpoint); err != nil && !os.IsNotExist(err) {
-		logrus.Debugf("Failed to remove mountpoint %s overlay: %s - %v", id, mountpoint, err)
-		return fmt.Errorf("removing mount point %q: %w", mountpoint, err)
-	}
+	if !inAdditionalStore {
+		uid, gid := int(0), int(0)
+		fi, err := os.Stat(mountpoint)
+		if err != nil {
+			return err
+		}
+		if stat, ok := fi.Sys().(*syscall.Stat_t); ok {
+			uid, gid = int(stat.Uid), int(stat.Gid)
+		}
 
+		tmpMountpoint := path.Join(dir, "merged.1")
+		if err := idtools.MkdirAs(tmpMountpoint, 0o700, uid, gid); err != nil && !errors.Is(err, os.ErrExist) {
+			return err
+		}
+		// rename(2) can be used on an empty directory, as it is the mountpoint after umount, and it retains
+		// its atomic semantic.  In this way the "merged" directory is never removed.
+		if err := unix.Rename(tmpMountpoint, mountpoint); err != nil {
+			logrus.Debugf("Failed to replace mountpoint %s overlay: %s - %v", id, mountpoint, err)
+			return fmt.Errorf("replacing mount point %q: %w", mountpoint, err)
+		}
+	}
 	return nil
 }
 

vendor/github.com/containers/storage/userns.go

@@ -1,18 +1,21 @@
+//go:build linux
+
 package storage
 
 import (
 	"fmt"
 	"os"
 	"os/user"
-	"path/filepath"
 	"strconv"
 
 	drivers "github.com/containers/storage/drivers"
 	"github.com/containers/storage/pkg/idtools"
 	"github.com/containers/storage/pkg/unshare"
 	"github.com/containers/storage/types"
+	securejoin "github.com/cyphar/filepath-securejoin"
 	libcontainerUser "github.com/opencontainers/runc/libcontainer/user"
 	"github.com/sirupsen/logrus"
+	"golang.org/x/sys/unix"
 )
 
 // getAdditionalSubIDs looks up the additional IDs configured for
@@ -85,40 +88,59 @@ const nobodyUser = 65534
 // parseMountedFiles returns the maximum UID and GID found in the /etc/passwd and
 // /etc/group files.
 func parseMountedFiles(containerMount, passwdFile, groupFile string) uint32 {
+	var (
+		passwd *os.File
+		group  *os.File
+		size   int
+		err    error
+	)
 	if passwdFile == "" {
-		passwdFile = filepath.Join(containerMount, "etc/passwd")
+		passwd, err = secureOpen(containerMount, "/etc/passwd")
+	} else {
+		// User-specified override from a volume. Will not be in
+		// container root.
+		passwd, err = os.Open(passwdFile)
 	}
-	if groupFile == "" {
-		groupFile = filepath.Join(groupFile, "etc/group")
-	}
-
-	size := 0
-
-	users, err := libcontainerUser.ParsePasswdFile(passwdFile)
 	if err == nil {
-		for _, u := range users {
-			// Skip the "nobody" user otherwise we end up with 65536
-			// ids with most images
-			if u.Name == "nobody" {
-				continue
-			}
-			if u.Uid > size && u.Uid != nobodyUser {
-				size = u.Uid
-			}
-			if u.Gid > size && u.Gid != nobodyUser {
-				size = u.Gid
+		defer passwd.Close()
+
+		users, err := libcontainerUser.ParsePasswd(passwd)
+		if err == nil {
+			for _, u := range users {
+				// Skip the "nobody" user otherwise we end up with 65536
+				// ids with most images
+				if u.Name == "nobody" || u.Name == "nogroup" {
+					continue
+				}
+				if u.Uid > size && u.Uid != nobodyUser {
+					size = u.Uid + 1
+				}
+				if u.Gid > size && u.Gid != nobodyUser {
+					size = u.Gid + 1
+				}
 			}
 		}
 	}
 
-	groups, err := libcontainerUser.ParseGroupFile(groupFile)
+	if groupFile == "" {
+		group, err = secureOpen(containerMount, "/etc/group")
+	} else {
+		// User-specified override from a volume. Will not be in
+		// container root.
+		group, err = os.Open(groupFile)
+	}
 	if err == nil {
-		for _, g := range groups {
-			if g.Name == "nobody" {
-				continue
-			}
-			if g.Gid > size && g.Gid != nobodyUser {
-				size = g.Gid
+		defer group.Close()
+
+		groups, err := libcontainerUser.ParseGroup(group)
+		if err == nil {
+			for _, g := range groups {
+				if g.Name == "nobody" || g.Name == "nogroup" {
+					continue
+				}
+				if g.Gid > size && g.Gid != nobodyUser {
+					size = g.Gid + 1
+				}
 			}
 		}
 	}
@@ -309,3 +331,19 @@ func getAutoUserNSIDMappings(
 	gidMap := append(availableGIDs.zip(requestedContainerGIDs), additionalGIDMappings...)
 	return uidMap, gidMap, nil
 }
+
+// Securely open (read-only) a file in a container mount.
+func secureOpen(containerMount, file string) (*os.File, error) {
+	filePath, err := securejoin.SecureJoin(containerMount, file)
+	if err != nil {
+		return nil, err
+	}
+
+	flags := unix.O_PATH | unix.O_CLOEXEC | unix.O_RDONLY
+	fileHandle, err := os.OpenFile(filePath, flags, 0)
+	if err != nil {
+		return nil, err
+	}
+
+	return fileHandle, nil
+}

vendor/github.com/containers/storage/userns_unsupported.go

@@ -0,0 +1,14 @@
+//go:build !linux
+
+package storage
+
+import (
+	"errors"
+
+	"github.com/containers/storage/pkg/idtools"
+	"github.com/containers/storage/types"
+)
+
+func (s *store) getAutoUserNS(_ *types.AutoUserNsOptions, _ *Image, _ rwLayerStore, _ []roLayerStore) ([]idtools.IDMap, []idtools.IDMap, error) {
+	return nil, nil, errors.New("user namespaces are not supported on this platform")
+}

vendor/modules.txt

@@ -233,7 +233,7 @@ github.com/containers/ocicrypt/keywrap/pkcs7
 github.com/containers/ocicrypt/spec
 github.com/containers/ocicrypt/utils
 github.com/containers/ocicrypt/utils/keyprovider
-# github.com/containers/storage v1.51.0
+# github.com/containers/storage v1.51.2
 ## explicit; go 1.19
 github.com/containers/storage
 github.com/containers/storage/drivers