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>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 293bc2e47a73..a235f0016889 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -231,7 +231,7 @@ static int filldir_one(void * __buf, const char * name, int len,
         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;