linux-kernel - Re: [PATCH] fix oops on rmmod capidrv

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

Message-Id: <200804291527.29611.gerd.von.egidy@intra2net.com>
Date:	Tue, 29 Apr 2008 15:27:29 +0200
From:	"Gerd v. Egidy" <gerd.von.egidy@...ra2net.com>
To:	linux-kernel@...r.kernel.org
Cc:	stable@...nel.org
Subject: Re: [PATCH] fix oops on rmmod capidrv

Hi,

my patch below was added to 2.6.23.15 and linus tree that became 2.6.25, but 
was too late for 2.6.24. So if you consider another stable release for 2.6.24 
you might want to add that patch too.

Kind regards,

Gerd

Fix overwriting the stack with the version string
(it is currently 10 bytes + zero) when unloading the
capidrv module. Safeguard against overwriting it
should the version string grow in the future.

Should fix Kernel Bug Tracker Bug 9696.

Signed-off-by: Gerd v. Egidy <gerd.von.egidy@...ra2net.com>
Acked-by: Karsten Keil <kkeil@...e.de>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

--- a/drivers/isdn/capi/capidrv.c
+++ b/drivers/isdn/capi/capidrv.c
@@ -2306,13 +2306,14 @@ static int __init capidrv_init(void)

 static void __exit capidrv_exit(void)
 {
-	char rev[10];
+	char rev[32];
 	char *p;

 	if ((p = strchr(revision, ':')) != 0) {
-		strcpy(rev, p + 1);
-		p = strchr(rev, '$');
-		*p = 0;
+		strncpy(rev, p + 1, sizeof(rev));
+		rev[sizeof(rev)-1] = 0;
+		if ((p = strchr(rev, '$')) != 0)
+			*p = 0;
 	} else {
 		strcpy(rev, " ??? ");
 	}

-- 
Address (better: trap) for people I really don't want to get mail from:
joanne@...tusamerica.com
--
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/