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-next>] [day] [month] [year] [list]
Message-ID: <20071008065009.GA2862@darkstar.te-china.tietoenator.com>
Date:	Mon, 8 Oct 2007 14:50:10 +0800
From:	Dave Young <hidave.darkstar@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, gregkh@...e.de
Subject: [PATCH] param_sysfs_builtin memchr argument fix

If memchr argument is longer than strlen(kp->name), there will be some
weird result. 

Signed-off-by: Dave Young <hidave.darkstar@...il.com> 

---
params.c |   10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

diff -upr linux/kernel/params.c linux.new/kernel/params.c
--- linux/kernel/params.c	2007-10-08 14:30:06.000000000 +0800
+++ linux.new/kernel/params.c	2007-10-08 14:31:22.000000000 +0800
@@ -592,15 +592,21 @@ static void __init param_sysfs_builtin(v
 
 	for (i=0; i < __stop___param - __start___param; i++) {
 		char *dot;
+		int kplen;
 
 		kp = &__start___param[i];
+		kplen = strlen(kp->name);
 
 		/* We do not handle args without periods. */
-		dot = memchr(kp->name, '.', MAX_KBUILD_MODNAME);
+		if (kplen > MAX_KBUILD_MODNAME) {
+			DEBUGP("kernel parameter %s is too long\n", kp->name);
+			continue;
+		}
+		dot = memchr(kp->name, '.', kplen);
 		if (!dot) {
 			DEBUGP("couldn't find period in %s\n", kp->name);
 			continue;
-		}
+		} 
 		name_len = dot - kp->name;
 
  		/* new kbuild_modname? */
-
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/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ