Patchwork [3.5.y.z,extended,stable] Patch "ext4: fix memory leak in ext4_xattr_set_acl()'s error path" has been added to staging queue

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Submitter Herton Ronaldo Krzesinski
Date Jan. 7, 2013, 8:32 p.m.
Message ID <1357590764-17248-1-git-send-email-herton.krzesinski@canonical.com>
Download mbox | patch
Permalink /patch/210127/
State New
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Comments

Herton Ronaldo Krzesinski - Jan. 7, 2013, 8:32 p.m.
This is a note to let you know that I have just added a patch titled

    ext4: fix memory leak in ext4_xattr_set_acl()'s error path

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Herton

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From 74d45b43f6403f2a0ddf48889c31ae6c3734be42 Mon Sep 17 00:00:00 2001
From: Eugene Shatokhin <eugene.shatokhin@rosalab.ru>
Date: Thu, 8 Nov 2012 15:11:11 -0500
Subject: [PATCH] ext4: fix memory leak in ext4_xattr_set_acl()'s error path

commit 24ec19b0ae83a385ad9c55520716da671274b96c upstream.

In ext4_xattr_set_acl(), if ext4_journal_start() returns an error,
posix_acl_release() will not be called for 'acl' which may result in a
memory leak.

This patch fixes that.

Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Eugene Shatokhin <eugene.shatokhin@rosalab.ru>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
---
 fs/ext4/acl.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--
1.7.9.5

Patch

diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index a5c29bb..8535c45 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -410,8 +410,10 @@  ext4_xattr_set_acl(struct dentry *dentry, const char *name, const void *value,

 retry:
 	handle = ext4_journal_start(inode, EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
-	if (IS_ERR(handle))
-		return PTR_ERR(handle);
+	if (IS_ERR(handle)) {
+		error = PTR_ERR(handle);
+		goto release_and_out;
+	}
 	error = ext4_set_acl(handle, inode, type, acl);
 	ext4_journal_stop(handle);
 	if (error == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))