linux-kernel - [PATCH 1/1] __send_signal: pass q->info, not info, to userns_fixup_signal

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: <20111118173703.GA11823@sergelap>
Date:	Fri, 18 Nov 2011 11:37:03 -0600
From:	"Serge E. Hallyn" <serge.hallyn@...onical.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	"Serge E. Hallyn" <serge@...lyn.com>, richard@....at,
	containers@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, eparis@...hat.com, oleg@...hat.com,
	dhowells@...hat.com
Subject: [PATCH 1/1] __send_signal: pass q->info, not info, to
 userns_fixup_signal_uid

Eric Biederman pointed out that passing info is a bug and could lead
to a NULL pointer deref to boot.

Signed-off-by: Serge Hallyn <serge.hallyn@...onical.com>
---
 kernel/signal.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/signal.c b/kernel/signal.c
index c0f0782..2751f79 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1118,7 +1118,7 @@ static int __send_signal(int sig, struct siginfo *info, struct task_struct *t,
 			break;
 		}
 
-		userns_fixup_signal_uid(info, t);
+		userns_fixup_signal_uid(q->info, t);
 
 	} else if (!is_si_special(info)) {
 		if (sig >= SIGRTMIN && info->si_code != SI_USER) {
-- 
1.7.5.4

--
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/