linux-kernel - [PATCH 3.14 043/228] aio: fix potential leak in aio_run

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Message-Id: <20140604232349.464128345@linuxfoundation.org>
Date:	Wed,  4 Jun 2014 16:21:12 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Leon Yu <chianglungyu@...il.com>,
	Benjamin LaHaise <bcrl@...ck.org>
Subject: [PATCH 3.14 043/228] aio: fix potential leak in aio_run_iocb().

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

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

From: Leon Yu <chianglungyu@...il.com>

commit 754320d6e166d3a12cb4810a452bde00afbd4e9a upstream.

iovec should be reclaimed whenever caller of rw_copy_check_uvector() returns,
but it doesn't hold when failure happens right after aio_setup_vectored_rw().

Fix that in a such way to avoid hairy goto.

Signed-off-by: Leon Yu <chianglungyu@...il.com>
Signed-off-by: Benjamin LaHaise <bcrl@...ck.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/aio.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1299,10 +1299,8 @@ rw_common:
 						&iovec, compat)
 			: aio_setup_single_vector(req, rw, buf, &nr_segs,
 						  iovec);
-		if (ret)
-			return ret;
-
-		ret = rw_verify_area(rw, file, &req->ki_pos, req->ki_nbytes);
+		if (!ret)
+			ret = rw_verify_area(rw, file, &req->ki_pos, req->ki_nbytes);
 		if (ret < 0) {
 			if (iovec != &inline_vec)
 				kfree(iovec);


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