[PATCH] exfat: call brelse() on error path

[Dan Carpenter]

If the second exfat_get_dentry() call fails then we need to release
"old_bh" before returning.

Reported-by: Markus Elfring <markus.elfr...@web.de>
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
---
 fs/exfat/namei.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/exfat/namei.c b/fs/exfat/namei.c
index 5b0f35329d63e..fda92c824ff11 100644
--- a/fs/exfat/namei.c
+++ b/fs/exfat/namei.c
@@ -1077,10 +1077,14 @@ static int exfat_rename_file(struct inode *inode, 
struct exfat_chain *p_dir,
 
                epold = exfat_get_dentry(sb, p_dir, oldentry + 1, &old_bh,
                        &sector_old);
+               if (!epold)
+                       return -EIO;
                epnew = exfat_get_dentry(sb, p_dir, newentry + 1, &new_bh,
                        &sector_new);
-               if (!epold || !epnew)
+               if (!epnew) {
+                       brelse(old_bh);
                        return -EIO;
+               }
 
                memcpy(epnew, epold, DENTRY_SIZE);
                exfat_update_bh(sb, new_bh, sync);
-- 
2.26.2