mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-10-01 01:35:54 -04:00
35 lines
1.1 KiB
Diff
35 lines
1.1 KiB
Diff
From d157bd761585605b7882935ffb86286919f62ea1 Mon Sep 17 00:00:00 2001
|
|
From: Florian Westphal <fw@strlen.de>
|
|
Date: Thu, 10 Mar 2016 01:56:23 +0100
|
|
Subject: netfilter: x_tables: check for size overflow
|
|
|
|
Ben Hawkes says:
|
|
integer overflow in xt_alloc_table_info, which on 32-bit systems can
|
|
lead to small structure allocation and a copy_from_user based heap
|
|
corruption.
|
|
|
|
Reported-by: Ben Hawkes <hawkes@google.com>
|
|
Signed-off-by: Florian Westphal <fw@strlen.de>
|
|
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
|
|
---
|
|
net/netfilter/x_tables.c | 3 +++
|
|
1 file changed, 3 insertions(+)
|
|
|
|
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c
|
|
index d0cd2b9..582c9cf 100644
|
|
--- a/net/netfilter/x_tables.c
|
|
+++ b/net/netfilter/x_tables.c
|
|
@@ -659,6 +659,9 @@ struct xt_table_info *xt_alloc_table_info(unsigned int size)
|
|
struct xt_table_info *info = NULL;
|
|
size_t sz = sizeof(*info) + size;
|
|
|
|
+ if (sz < sizeof(*info))
|
|
+ return NULL;
|
|
+
|
|
/* Pedantry: prevent them from hitting BUG() in vmalloc.c --RR */
|
|
if ((SMP_ALIGN(size) >> PAGE_SHIFT) + 2 > totalram_pages)
|
|
return NULL;
|
|
--
|
|
cgit v1.1
|
|
|