Subject: [PATCH] compat bug in sys_recvmsg, MSG_CMSG_COMPAT check missing

From: Olaf Hering <[email-masked]>
Date: Sat, 5 Jun 2004 22:43:34 +0200

packet_recvmsg() gets the flags from the compat_sys_socketcall(), but it
does not check for the active MSG_CMSG_COMPAT bit. As a result, it
returns -EINVAL and makes the user rather unhappy

diff -purN linux-2.6.7-rc2-bk5.orig/net/packet/af_packet.c linux-2.6.7-rc2-bk5/net/packet/af_packet.c
--- linux-2.6.7-rc2-bk5.orig/net/packet/af_packet.c	2004-06-05 09:34:48.000000000 +0200
+++ linux-2.6.7-rc2-bk5/net/packet/af_packet.c	2004-06-05 22:32:16.000000000 +0200
@@ -1037,7 +1037,7 @@ static int packet_recvmsg(struct kiocb *
 	int copied, err;
 
 	err = -EINVAL;
-	if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC))
+	if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
 		goto out;
 
 #if 0
-- 
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