linux-kernel - [PATCH 2/3] bzip2: Add missing checks for malloc returning NULL

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Message-ID: <4b26b1ef.ln20bM9Mn4gzB21L%phillip@lougher.demon.co.uk>
Date:	Mon, 14 Dec 2009 21:45:19 +0000
From:	Phillip Lougher <phillip@...gher.demon.co.uk>
To:	linux-kernel@...r.kernel.org, linux-embedded@...r.kernel.org,
	akpm@...ux-foundation.org
Cc:	phillip@...gher.demon.co.uk, mingo@...e.hu,
	albin.tonnerre@...e-electrons.com
Subject: [PATCH 2/3] bzip2: Add missing checks for malloc returning NULL


Signed-off-by: Phillip Lougher <phillip@...gher.demon.co.uk>
---
 lib/decompress_bunzip2.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/lib/decompress_bunzip2.c b/lib/decompress_bunzip2.c
index 600f473..a6b836b 100644
--- a/lib/decompress_bunzip2.c
+++ b/lib/decompress_bunzip2.c
@@ -637,6 +637,8 @@ static int INIT start_bunzip(struct bunzip_data **bdp, void *inbuf, int len,
 
 	/* Allocate bunzip_data.  Most fields initialize to zero. */
 	bd = *bdp = malloc(i);
+	if (!bd)
+		return RETVAL_OUT_OF_MEMORY;
 	memset(bd, 0, sizeof(struct bunzip_data));
 	/* Setup input buffer */
 	bd->inbuf = inbuf;
@@ -664,6 +666,8 @@ static int INIT start_bunzip(struct bunzip_data **bdp, void *inbuf, int len,
 	bd->dbufSize = 100000*(i-BZh0);
 
 	bd->dbuf = large_malloc(bd->dbufSize * sizeof(int));
+	if (!bd->dbuf)
+		return RETVAL_OUT_OF_MEMORY;
 	return RETVAL_OK;
 }
 
@@ -686,7 +690,7 @@ STATIC int INIT bunzip2(unsigned char *buf, int len,
 
 	if (!outbuf) {
 		error("Could not allocate output bufer");
-		return -1;
+		return RETVAL_OUT_OF_MEMORY;
 	}
 	if (buf)
 		inbuf = buf;
@@ -694,6 +698,7 @@ STATIC int INIT bunzip2(unsigned char *buf, int len,
 		inbuf = malloc(BZIP2_IOBUF_SIZE);
 	if (!inbuf) {
 		error("Could not allocate input bufer");
+		i = RETVAL_OUT_OF_MEMORY;
 		goto exit_0;
 	}
 	i = start_bunzip(&bd, inbuf, len, fill);
@@ -720,11 +725,14 @@ STATIC int INIT bunzip2(unsigned char *buf, int len,
 	} else if (i == RETVAL_UNEXPECTED_OUTPUT_EOF) {
 		error("Compressed file ends unexpectedly");
 	}
+	if (!bd)
+		goto exit_1;
 	if (bd->dbuf)
 		large_free(bd->dbuf);
 	if (pos)
 		*pos = bd->inbufPos;
 	free(bd);
+exit_1:
 	if (!buf)
 		free(inbuf);
 exit_0:
-- 
1.6.3.3

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