jffs2: fix a memleak in read_direntry()

Need to free the memory allocated for 'fd' if failed to read all
of the remainder name.

Signed-off-by: Wei Fang <fangwei1@huawei.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index 28e0aab42bc34f6a26f67b82bc3f8c94a9bf4232..bfebbf13698c0e0d255e20f5ebf26de7fd6b5845 100644 (file)
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -660,8 +660,12 @@ static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_r
 
                err = jffs2_flash_read(c, (ref_offset(ref)) + read,
                                rd->nsize - already, &read, &fd->name[already]);
-               if (unlikely(read != rd->nsize - already) && likely(!err))
+               if (unlikely(read != rd->nsize - already) && likely(!err)) {
+                       jffs2_free_full_dirent(fd);
+                       JFFS2_ERROR("short read: wanted %d bytes, got %zd\n",
+                                   rd->nsize - already, read);
                        return -EIO;
+               }
 
                if (unlikely(err)) {
                        JFFS2_ERROR("read remainder of name: error %d\n", err);