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ipp2p: guard against potential unaligned access

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get_u16() and get_u32() may get passed unaligned pointers;
let's play it safe.
This commit is contained in:
Jan Engelhardt
2008-03-26 07:15:03 +01:00
parent 3c8131b976
commit 0712d0fdca
1 changed files with 4 additions and 3 deletions
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7
extensions/xt_ipp2p.c
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@@ -3,6 +3,7 @@
#include <linux/netfilter_ipv4/ip_tables.h> #include <linux/netfilter_ipv4/ip_tables.h>
#include <net/tcp.h> #include <net/tcp.h>
#include <net/udp.h> #include <net/udp.h>
#include <asm/unaligned.h>
#include "xt_ipp2p.h" #include "xt_ipp2p.h"
#include "compat_xtables.h" #include "compat_xtables.h"
@@ -10,9 +11,9 @@
//#define IPP2P_DEBUG_SOUL //#define IPP2P_DEBUG_SOUL
//#define IPP2P_DEBUG_WINMX //#define IPP2P_DEBUG_WINMX
#define get_u8(X, O) (*(__u8 *)(X + O)) #define get_u8(X, O) (*(__u8 *)(X + O))
#define get_u16(X, O) (*(__u16 *)(X + O)) #define get_u16(X, O) get_unaligned((__u16 *)(X + O))
#define get_u32(X, O) (*(__u32 *)(X + O)) #define get_u32(X, O) get_unaligned((__u32 *)(X + O))
MODULE_AUTHOR("Eicke Friedrich/Klaus Degner <ipp2p@ipp2p.org>"); MODULE_AUTHOR("Eicke Friedrich/Klaus Degner <ipp2p@ipp2p.org>");
MODULE_DESCRIPTION("An extension to iptables to identify P2P traffic."); MODULE_DESCRIPTION("An extension to iptables to identify P2P traffic.");