linux-kernel - [PATCH 1/2] kernel/sysctl.c: check return value after call proc_put_char() in __do_proc_doulongvec

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 for Android: free password hash cracker in your pocket

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

Message-ID: <5212E4B2.5020708@asianux.com>
Date:	Tue, 20 Aug 2013 11:38:26 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Ingo Molnar <mingo@...nel.org>,
	"a.p.zijlstra@...llo.nl" <a.p.zijlstra@...llo.nl>,
	Mel Gorman <mgorman@...e.de>, riel@...hat.com
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] kernel/sysctl.c: check return value after call proc_put_char()
 in __do_proc_doulongvec_minmax()

Need check the return value of proc_put_char(), just like another have
done in __do_proc_doulongvec_minmax().

Signed-off-by: Chen Gang <gang.chen@...anux.com>
---
 kernel/sysctl.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 7822cd8..ee00986 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -2214,8 +2214,11 @@ static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int
 			*i = val;
 		} else {
 			val = convdiv * (*i) / convmul;
-			if (!first)
+			if (!first) {
 				err = proc_put_char(&buffer, &left, '\t');
+				if (err)
+					goto free;
+			}
 			err = proc_put_long(&buffer, &left, val, false);
 			if (err)
 				break;
-- 
1.7.7.6
--
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/