linux-kernel - [PATCH] kdb: fix possible memory leak in kdb

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: <CAPgLHd_oQLthvUff49aVnjbyXYNybECJn=1m8vFcDo3PLTSuTg@mail.gmail.com>
Date:	Sun, 2 Sep 2012 21:29:12 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	jason.wessel@...driver.com
Cc:	yongjun_wei@...ndmicro.com.cn,
	kgdb-bugreport@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: [PATCH] kdb: fix possible memory leak in kdb_defcmd2()

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

In the error handling case of kdb_defcmd2() s->command has
been set to NULL but the save_command remain no free, this will
cause memory leak.

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 kernel/debug/kdb/kdb_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index 31df170..0cbe79f 100644
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -651,6 +651,7 @@ static int kdb_defcmd2(const char *cmdstr, const char *argv0)
 		kdb_printf("Could not allocate new kdb_defcmd table for %s\n",
 			   cmdstr);
 		s->usable = 0;
+		kfree(save_command);
 		return KDB_NOTIMP;
 	}
 	memcpy(s->command, save_command, s->count * sizeof(*(s->command)));


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/