[PATCH 4/4] NFSD: Ignore and warn once for more fslocs or more uuids

[Kinglong Mee <kinglongmee@gmail.com>]

If mountd writes more fslocs or more uuids, just ignore and warn once.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
---
 fs/nfsd/export.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 90d37b6..1d56ae3 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -394,6 +394,12 @@ fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc)
 	int len;
 	int migrated, i, err;
 
+	/* utils writes more fslocs than one */
+	if (fsloc->locations) {
+		WARN_ON_ONCE(1);
+		return 0;
+	}
+
 	/* listsize */
 	err = get_uint(mesg, &fsloc->locations_count);
 	if (err)
@@ -485,6 +491,12 @@ uuid_parse(char **mesg, char *buf, unsigned char **puuid)
 {
 	int len;
 
+	/* utils writes more uuid than one */
+	if (*puuid) {
+		WARN_ON_ONCE(1);
+		return 0;
+	}
+
 	/* expect a 16 byte uuid encoded as \xXXXX... */
 	len = qword_get(mesg, buf, PAGE_SIZE);
 	if (len != EX_UUID_LEN)
-- 
1.9.0