nfsd4: memory corruption in numeric_name_to_id()

"id" is type is a uid_t (32 bits) but on 64 bit systems strict_strtoul()
modifies 64 bits of data.  We should use kstrtouint() instead.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index 69ca9c5..322d11c 100644 (file)
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -581,7 +581,7 @@ numeric_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namel
        /* Just to make sure it's null-terminated: */
        memcpy(buf, name, namelen);
        buf[namelen] = '\0';
-       ret = strict_strtoul(name, 10, (unsigned long *)id);
+       ret = kstrtouint(name, 10, id);
        return ret == 0;
 }