linux-kernel - [PATCH 2/2] pstore: fix memory leak when decompress using big_oops

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Message-ID: <20140312133403.GB29079@shuo-gentoo>
Date:	Wed, 12 Mar 2014 21:34:06 +0800
From:	Liu Shuo <shuox.liu@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Kees Cook <keescook@...omium.org>,
	Anton Vorontsov <anton@...msg.org>,
	Colin Cross <ccross@...roid.com>,
	Tony Luck <tony.luck@...el.com>,
	Zhang Yanmin <yanmin_zhang@...ux.intel.com>
Subject: [PATCH 2/2] pstore: fix memory leak when decompress using
 big_oops_buf

From: Liu ShuoX <shuox.liu@...el.com>

After sucessful decompressing, the buffer which pointed by 'buf' will be
lost as 'buf' is overwrite by 'big_oops_buf' and will never be freed. 

Signed-off-by: Liu ShuoX <shuox.liu@...el.com>
---
 fs/pstore/platform.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 78c3c20..46d269e 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -497,6 +497,7 @@ void pstore_get_records(int quiet)
 							big_oops_buf_sz);
 
 			if (unzipped_len > 0) {
+				kfree(buf);
 				buf = big_oops_buf;
 				size = unzipped_len;
 				compressed = false;
-- 
1.8.3.2

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