linux-kernel - [PATCH 3.12 008/127] UBIFS: Fix possible memory leak in ubifs

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Date:   Fri, 25 Nov 2016 09:28:41 +0100
From:   Jiri Slaby <jslaby@...e.cz>
To:     stable@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Richard Weinberger <richard@....at>,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 008/127] UBIFS: Fix possible memory leak in ubifs_readdir()

From: Richard Weinberger <richard@....at>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit aeeb14f763917ccf639a602cfbeee6957fd944a2 upstream.

If ubifs_tnc_next_ent() returns something else than -ENOENT
we leak file->private_data.

Signed-off-by: Richard Weinberger <richard@....at>
Reviewed-by: David Gstir <david@...ma-star.at>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 fs/ubifs/dir.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 6b4947f75af7..9bd17a857667 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -447,13 +447,14 @@ static int ubifs_readdir(struct file *file, struct dir_context *ctx)
 	}
 
 out:
+	kfree(file->private_data);
+	file->private_data = NULL;
+
 	if (err != -ENOENT) {
 		ubifs_err("cannot find next direntry, error %d", err);
 		return err;
 	}
 
-	kfree(file->private_data);
-	file->private_data = NULL;
 	/* 2 is a special value indicating that there are no more direntries */
 	ctx->pos = 2;
 	return 0;
-- 
2.10.2