linux-kernel - [PATCH] fsck.f2fs: fix to avoid accessing invalid memory address

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20180423060145.50324-1-yuchao0@huawei.com>
Date:   Mon, 23 Apr 2018 14:01:45 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     <jaegeuk@...nel.org>
CC:     <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>, <chao@...nel.org>,
        Chao Yu <yuchao0@...wei.com>
Subject: [PATCH] fsck.f2fs: fix to avoid accessing invalid memory address

This patch adds to check return value of calloc in write_superblock().

Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
 fsck/mount.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fsck/mount.c b/fsck/mount.c
index 7e936dc056e5..badbe639742e 100644
--- a/fsck/mount.c
+++ b/fsck/mount.c
@@ -2155,6 +2155,7 @@ void write_superblock(struct f2fs_super_block *new_sb)
 	u_int8_t *buf;
 
 	buf = calloc(BLOCK_SZ, 1);
+	ASSERT(buf);
 
 	memcpy(buf + F2FS_SUPER_OFFSET, new_sb, sizeof(*new_sb));
 	for (index = 0; index < 2; index++) {
-- 
2.15.0.55.gc2ece9dc4de6