linux-kernel - [54/91] UBIFS: fix memory leak on error path

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Message-Id: <20110616001614.573622193@clark.kroah.org>
Date:	Wed, 15 Jun 2011 17:15:51 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Artem Bityutskiy <Artem.Bityutskiy@...ia.com>
Subject: [54/91] UBIFS: fix memory leak on error path

2.6.32-longterm review patch.  If anyone has any objections, please let us know.

------------------

From: Artem Bityutskiy <Artem.Bityutskiy@...ia.com>

commit 812eb258311f89bcd664a34a620f249d54a2cd83 upstream.

UBIFS leaks memory on error path in 'ubifs_jnl_update()' in case of write
failure because it forgets to free the 'struct ubifs_dent_node *dent' object.
Although the object is small, the alignment can make it large - e.g., 2KiB
if the min. I/O unit is 2KiB.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@...ia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 fs/ubifs/journal.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/ubifs/journal.c
+++ b/fs/ubifs/journal.c
@@ -665,6 +665,7 @@ out_free:
 
 out_release:
 	release_head(c, BASEHD);
+	kfree(dent);
 out_ro:
 	ubifs_ro_mode(c, err);
 	if (last_reference)


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