cifs: Fix xattr name checks

Use strcmp(str, name) instead of strncmp(str, name, strlen(name)) for
checking if str and name are the same (as opposed to name being a prefix
of str) in the gexattr and setxattr inode operations.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c
index 5d57c85..6e73ba9 100644 (file)
--- a/fs/cifs/xattr.c
+++ b/fs/cifs/xattr.c
@@ -129,7 +129,7 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
                   == 0) {
                if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
                        goto set_ea_exit;
-               if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0)
+               if (strcmp(ea_name, CIFS_XATTR_DOS_ATTRIB) == 0)
                        cifs_dbg(FYI, "attempt to set cifs inode metadata\n");
 
                ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
@@ -147,8 +147,7 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
                        rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
                                full_path, ea_name, ea_value, (__u16)value_size,
                                cifs_sb->local_nls, cifs_remap(cifs_sb));
-       } else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
-                       strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
+       } else if (strcmp(ea_name, CIFS_XATTR_CIFS_ACL) == 0) {
 #ifdef CONFIG_CIFS_ACL
                struct cifs_ntsd *pacl;
                pacl = kmalloc(value_size, GFP_KERNEL);
@@ -170,10 +169,7 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
                cifs_dbg(FYI, "Set CIFS ACL not supported yet\n");
 #endif /* CONFIG_CIFS_ACL */
        } else {
-               int temp;
-               temp = strncmp(ea_name, XATTR_NAME_POSIX_ACL_ACCESS,
-                       strlen(XATTR_NAME_POSIX_ACL_ACCESS));
-               if (temp == 0) {
+               if (strcmp(ea_name, XATTR_NAME_POSIX_ACL_ACCESS) == 0) {
 #ifdef CONFIG_CIFS_POSIX
                        if (sb->s_flags & MS_POSIXACL)
                                rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
@@ -184,8 +180,7 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
 #else
                        cifs_dbg(FYI, "set POSIX ACL not supported\n");
 #endif
-               } else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_DEFAULT,
-                                  strlen(XATTR_NAME_POSIX_ACL_DEFAULT)) == 0) {
+               } else if (strcmp(ea_name, XATTR_NAME_POSIX_ACL_DEFAULT) == 0) {
 #ifdef CONFIG_CIFS_POSIX
                        if (sb->s_flags & MS_POSIXACL)
                                rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
@@ -246,7 +241,7 @@ ssize_t cifs_getxattr(struct dentry *direntry, struct inode *inode,
                if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
                        goto get_ea_exit;
 
-               if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) {
+               if (strcmp(ea_name, CIFS_XATTR_DOS_ATTRIB) == 0) {
                        cifs_dbg(FYI, "attempt to query cifs inode metadata\n");
                        /* revalidate/getattr then populate from inode */
                } /* BB add else when above is implemented */
@@ -264,8 +259,7 @@ ssize_t cifs_getxattr(struct dentry *direntry, struct inode *inode,
                        rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
                                full_path, ea_name, ea_value, buf_size,
                                cifs_sb->local_nls, cifs_remap(cifs_sb));
-       } else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_ACCESS,
-                         strlen(XATTR_NAME_POSIX_ACL_ACCESS)) == 0) {
+       } else if (strcmp(ea_name, XATTR_NAME_POSIX_ACL_ACCESS) == 0) {
 #ifdef CONFIG_CIFS_POSIX
                if (sb->s_flags & MS_POSIXACL)
                        rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
@@ -275,8 +269,7 @@ ssize_t cifs_getxattr(struct dentry *direntry, struct inode *inode,
 #else
                cifs_dbg(FYI, "Query POSIX ACL not supported yet\n");
 #endif /* CONFIG_CIFS_POSIX */
-       } else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_DEFAULT,
-                         strlen(XATTR_NAME_POSIX_ACL_DEFAULT)) == 0) {
+       } else if (strcmp(ea_name, XATTR_NAME_POSIX_ACL_DEFAULT) == 0) {
 #ifdef CONFIG_CIFS_POSIX
                if (sb->s_flags & MS_POSIXACL)
                        rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
@@ -286,8 +279,7 @@ ssize_t cifs_getxattr(struct dentry *direntry, struct inode *inode,
 #else
                cifs_dbg(FYI, "Query POSIX default ACL not supported yet\n");
 #endif /* CONFIG_CIFS_POSIX */
-       } else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
-                               strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
+       } else if (strcmp(ea_name, CIFS_XATTR_CIFS_ACL) == 0) {
 #ifdef CONFIG_CIFS_ACL
                        u32 acllen;
                        struct cifs_ntsd *pacl;