exportfs: don't assume that ->iterate() won't feed us too long entries
On some filesystems it's impossible even with fs corruption, but we'd
better not rely on that, what with memcpy() into on-stack array we
are doing there.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 293bc2e..a235f00 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -231,7 +231,7 @@
int result = 0;
buf->sequence++;
- if (buf->ino == ino) {
+ if (buf->ino == ino && len <= NAME_MAX) {
memcpy(buf->name, name, len);
buf->name[len] = '\0';
buf->found = 1;