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Diffstat (limited to 'fs/nfs/idmap.c')
-rw-r--r--fs/nfs/idmap.c28
1 files changed, 26 insertions, 2 deletions
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index 18696882f1c6..cbe6e2fa8cef 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -33,6 +33,24 @@
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+
+static int nfs_map_string_to_numeric(const char *name, size_t namelen, __u32 *res)
+{
+ unsigned long val;
+ char buf[16];
+
+ if (memchr(name, '@', namelen) != NULL || namelen >= sizeof(buf))
+ return 0;
+ memcpy(buf, name, namelen);
+ buf[namelen] = '\0';
+ if (strict_strtoul(buf, 0, &val) != 0)
+ return 0;
+ *res = val;
+ return 1;
+}
#ifdef CONFIG_NFS_USE_NEW_IDMAPPER
@@ -42,7 +60,6 @@
#include <linux/keyctl.h>
#include <linux/key-type.h>
#include <linux/rcupdate.h>
-#include <linux/kernel.h>
#include <linux/err.h>
#include <keys/user-type.h>
@@ -221,11 +238,15 @@ static int nfs_idmap_lookup_id(const char *name, size_t namelen,
int nfs_map_name_to_uid(struct nfs_client *clp, const char *name, size_t namelen, __u32 *uid)
{
+ if (nfs_map_string_to_numeric(name, namelen, uid))
+ return 0;
return nfs_idmap_lookup_id(name, namelen, "uid", uid);
}
int nfs_map_group_to_gid(struct nfs_client *clp, const char *name, size_t namelen, __u32 *gid)
{
+ if (nfs_map_string_to_numeric(name, namelen, gid))
+ return 0;
return nfs_idmap_lookup_id(name, namelen, "gid", gid);
}
@@ -243,7 +264,6 @@ int nfs_map_gid_to_group(struct nfs_client *clp, __u32 gid, char *buf, size_t bu
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/init.h>
-#include <linux/types.h>
#include <linux/slab.h>
#include <linux/socket.h>
#include <linux/in.h>
@@ -699,6 +719,8 @@ int nfs_map_name_to_uid(struct nfs_client *clp, const char *name, size_t namelen
{
struct idmap *idmap = clp->cl_idmap;
+ if (nfs_map_string_to_numeric(name, namelen, uid))
+ return 0;
return nfs_idmap_id(idmap, &idmap->idmap_user_hash, name, namelen, uid);
}
@@ -706,6 +728,8 @@ int nfs_map_group_to_gid(struct nfs_client *clp, const char *name, size_t namele
{
struct idmap *idmap = clp->cl_idmap;
+ if (nfs_map_string_to_numeric(name, namelen, uid))
+ return 0;
return nfs_idmap_id(idmap, &idmap->idmap_group_hash, name, namelen, uid);
}