linux-ext4 - Re: [PATCH] e2fsprogs : Fix memory leak in ext2fs

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Message-ID: <20080711184625.GC26656@mit.edu>
Date:	Fri, 11 Jul 2008 14:46:25 -0400
From:	Theodore Tso <tytso@....edu>
To:	Manish Katiyar <mkatiyar@...il.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH] e2fsprogs : Fix memory leak in ext2fs_initialize.

Here's how the patch was applied; please note the style fixes I made
in the code and in the patch comments.

       	       	     	 	  	      - Ted

>From adc4e77d89d9a423c3fbe6457676b020c9ad3a64 Mon Sep 17 00:00:00 2001
From: Manish Katiyar <mkatiyar@...il.com>
Date: Fri, 11 Jul 2008 14:42:57 -0400
Subject: [PATCH] libext2fs: fix potential memory leak in ext2fs_initialize()

If we fail doing ext2fs_allocate_block_bitmap() or
ext2fs_allocate_inode_bitmap() we directly goto cleanup and don't free
the memory allocated to buf.

Signed-off-by: "Manish Katiyar" <mkatiyar@...il.com>
Signed-off-by: "Theodore Ts'o" <tytso@....edu>
---
 lib/ext2fs/initialize.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/lib/ext2fs/initialize.c b/lib/ext2fs/initialize.c
index 011656f..e9bfe49 100644
--- a/lib/ext2fs/initialize.c
+++ b/lib/ext2fs/initialize.c
@@ -105,7 +105,7 @@ errcode_t ext2fs_initialize(const char *name, int flags,
 	int		rsv_gdt;
 	int		csum_flag;
 	int		io_flags;
-	char		*buf;
+	char		*buf = 0;
 	char		c;

 	if (!param || !param->s_blocks_count)
@@ -429,6 +429,8 @@ ipg_retry:
 	*ret_fs = fs;
 	return 0;
 cleanup:
+	if (buf)
+		free(buf);
 	ext2fs_free(fs);
 	return retval;
 }
-- 
1.5.6.1.205.ge2c7.dirty

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