linux-kernel - [PATCH][IPv4/IPv6] Setting 0 for unused port field.

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: <200607250738.k6P7c67G089452@www262.sakura.ne.jp>
Date:	Tue, 25 Jul 2006 16:38:05 +0900
From:	from-linux-kernel@...ove.sakura.ne.jp
To:	linux-kernel@...r.kernel.org
Subject: [PATCH][IPv4/IPv6] Setting 0 for unused port field.

Hello.

The recvmsg() for raw socket seems to return random u16 value
from the kernel stack memory since port field is not initialized.
But I'm not sure this patch is correct.
Does raw socket return any information stored in port field?

---------- Start of patch ----------
diff -ur before/net/ipv4/raw.c after/net/ipv4/raw.c
--- before/net/ipv4/raw.c       2006-06-18 10:49:35.000000000 +0900
+++ after/net/ipv4/raw.c        2006-07-25 16:15:26.000000000 +0900
@@ -609,6 +609,7 @@
        if (sin) {
                sin->sin_family = AF_INET;
                sin->sin_addr.s_addr = skb->nh.iph->saddr;
+               sin->sin_port = 0;
                memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
        }
        if (inet->cmsg_flags)
diff -ur before/net/ipv6/raw.c after/net/ipv6/raw.c
--- before/net/ipv6/raw.c       2006-06-18 10:49:35.000000000 +0900
+++ after/net/ipv6/raw.c        2006-07-25 16:16:52.000000000 +0900
@@ -411,6 +411,7 @@
        /* Copy the address. */
        if (sin6) {
                sin6->sin6_family = AF_INET6;
+               sin6->sin6_port = 0;
                ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr);
                sin6->sin6_flowinfo = 0;
                sin6->sin6_scope_id = 0;
---------- End of patch ----------

Regards.
-
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/