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authorAndreas Gruenbacher <agruenba@redhat.com>2016-08-22 18:59:22 +0300
committerMiklos Szeredi <mszeredi@redhat.com>2016-09-01 12:11:59 +0300
commitfe2b75952347762a21f67d9df1199137ae5988b2 (patch)
tree8076ab77346ac69a5b60e0889b496248d58653ce /fs/overlayfs
parentfd36570a8805f39b40a0ebde19b08603aa201d17 (diff)
downloadlinux-fe2b75952347762a21f67d9df1199137ae5988b2.tar.xz
ovl: Fix OVL_XATTR_PREFIX
Make sure ovl_own_xattr_handler only matches attribute names starting with "overlay.", not "overlayXXX". Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Fixes: d837a49bd57f ("ovl: fix POSIX ACL setting") Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs')
-rw-r--r--fs/overlayfs/inode.c5
-rw-r--r--fs/overlayfs/overlayfs.h4
2 files changed, 4 insertions, 5 deletions
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 47a4f33df47b..f523511b324f 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -194,9 +194,8 @@ static int ovl_readlink(struct dentry *dentry, char __user *buf, int bufsiz)
bool ovl_is_private_xattr(const char *name)
{
-#define OVL_XATTR_PRE_NAME OVL_XATTR_PREFIX "."
- return strncmp(name, OVL_XATTR_PRE_NAME,
- sizeof(OVL_XATTR_PRE_NAME) - 1) == 0;
+ return strncmp(name, OVL_XATTR_PREFIX,
+ sizeof(OVL_XATTR_PREFIX) - 1) == 0;
}
int ovl_setxattr(struct dentry *dentry, struct inode *inode,
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 9a95e2c5653e..f50c390683a3 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -24,8 +24,8 @@ enum ovl_path_type {
(OVL_TYPE_MERGE(type) || !OVL_TYPE_UPPER(type))
-#define OVL_XATTR_PREFIX XATTR_TRUSTED_PREFIX "overlay"
-#define OVL_XATTR_OPAQUE OVL_XATTR_PREFIX ".opaque"
+#define OVL_XATTR_PREFIX XATTR_TRUSTED_PREFIX "overlay."
+#define OVL_XATTR_OPAQUE OVL_XATTR_PREFIX "opaque"
#define OVL_ISUPPER_MASK 1UL