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
| ||
|
Date: Sun, 11 Jul 2010 00:10:42 +0200 From: Dan Carpenter <error27@...il.com> To: Jouni Malinen <j@...fi> Cc: "John W. Linville" <linville@...driver.com>, Martin Decky <martin@...ky.cz>, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, kernel-janitors@...r.kernel.org Subject: [patch] hostap: fixup strlen() math In hostap_add_interface() we do: sprintf(dev->name, "%s%s", prefix, name); dev->name has IFNAMSIZ (16) characters. prefix is local->dev->name. name is "wds%d" strlen() returns the number of characters in the string not counting the NULL so if we have a string with 11 characters we get "12345678901wds%d" which is 16 characters and a NULL so we're past the end of the array. Signed-off-by: Dan Carpenter <error27@...il.com> diff --git a/drivers/net/wireless/hostap/hostap_main.c b/drivers/net/wireless/hostap/hostap_main.c index eb57d1e..f1bc258 100644 --- a/drivers/net/wireless/hostap/hostap_main.c +++ b/drivers/net/wireless/hostap/hostap_main.c @@ -186,7 +186,7 @@ int prism2_wds_add(local_info_t *local, u8 *remote_addr, return -ENOBUFS; /* verify that there is room for wds# postfix in the interface name */ - if (strlen(local->dev->name) > IFNAMSIZ - 5) { + if (strlen(local->dev->name) >= IFNAMSIZ - 5) { printk(KERN_DEBUG "'%s' too long base device name\n", local->dev->name); return -EINVAL; -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists