linux-kernel - Re: Linux 2.6.18.4

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Date:	Wed, 29 Nov 2006 11:52:30 -0800
From:	Chris Wright <chrisw@...s-sol.org>
To:	linux-kernel@...r.kernel.org
Cc:	Andrew Morton <akpm@...l.org>, torvalds@...l.org, stable@...nel.org
Subject: Re: Linux 2.6.18.4

diff --git a/Makefile b/Makefile
index 9eda185..d026088 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 VERSION = 2
 PATCHLEVEL = 6
 SUBLEVEL = 18
-EXTRAVERSION = .3
+EXTRAVERSION = .4
 NAME=Avast! A bilge rat!
 
 # *DOCUMENTATION*
diff --git a/net/bridge/br_ioctl.c b/net/bridge/br_ioctl.c
index 4e4119a..4c61a7e 100644
--- a/net/bridge/br_ioctl.c
+++ b/net/bridge/br_ioctl.c
@@ -58,12 +58,13 @@ static int get_fdb_entries(struct net_br
 {
 	int num;
 	void *buf;
-	size_t size = maxnum * sizeof(struct __fdb_entry);
+	size_t size;
 
-	if (size > PAGE_SIZE) {
-		size = PAGE_SIZE;
+	/* Clamp size to PAGE_SIZE, test maxnum to avoid overflow */
+	if (maxnum > PAGE_SIZE/sizeof(struct __fdb_entry))
 		maxnum = PAGE_SIZE/sizeof(struct __fdb_entry);
-	}
+
+	size = maxnum * sizeof(struct __fdb_entry);
 
 	buf = kmalloc(size, GFP_USER);
 	if (!buf)
-
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