From 5cb30640ce01d76d256533bb2824c9cc14eb4070 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Tue, 13 Sep 2005 13:48:00 -0700 Subject: [PATCH] [NETFILTER]: Use correct type for "ports" module parameter With large port numbers the helper_names buffer can overflow. Noticed by Samir Bellabes Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv4/netfilter/ip_conntrack_ftp.c | 6 +++--- net/ipv4/netfilter/ip_conntrack_irc.c | 6 +++--- net/ipv4/netfilter/ip_conntrack_tftp.c | 6 +++--- 3 files changed, 9 insertions(+), 9 deletions(-) diff --git a/net/ipv4/netfilter/ip_conntrack_ftp.c b/net/ipv4/netfilter/ip_conntrack_ftp.c index 1b79ec3..d77d6b3 100644 --- a/net/ipv4/netfilter/ip_conntrack_ftp.c +++ b/net/ipv4/netfilter/ip_conntrack_ftp.c @@ -29,9 +29,9 @@ static char *ftp_buffer; static DEFINE_SPINLOCK(ip_ftp_lock); #define MAX_PORTS 8 -static int ports[MAX_PORTS]; +static short ports[MAX_PORTS]; static int ports_c; -module_param_array(ports, int, &ports_c, 0400); +module_param_array(ports, short, &ports_c, 0400); static int loose; module_param(loose, int, 0600); @@ -450,7 +450,7 @@ out_update_nl: } static struct ip_conntrack_helper ftp[MAX_PORTS]; -static char ftp_names[MAX_PORTS][10]; +static char ftp_names[MAX_PORTS][sizeof("ftp-65535")]; /* Not __exit: called from init() */ static void fini(void) diff --git a/net/ipv4/netfilter/ip_conntrack_irc.c b/net/ipv4/netfilter/ip_conntrack_irc.c index d7a8a98..1545741 100644 --- a/net/ipv4/netfilter/ip_conntrack_irc.c +++ b/net/ipv4/netfilter/ip_conntrack_irc.c @@ -34,7 +34,7 @@ #include #define MAX_PORTS 8 -static int ports[MAX_PORTS]; +static short ports[MAX_PORTS]; static int ports_c; static int max_dcc_channels = 8; static unsigned int dcc_timeout = 300; @@ -52,7 +52,7 @@ EXPORT_SYMBOL_GPL(ip_nat_irc_hook); MODULE_AUTHOR("Harald Welte "); MODULE_DESCRIPTION("IRC (DCC) connection tracking helper"); MODULE_LICENSE("GPL"); -module_param_array(ports, int, &ports_c, 0400); +module_param_array(ports, short, &ports_c, 0400); MODULE_PARM_DESC(ports, "port numbers of IRC servers"); module_param(max_dcc_channels, int, 0400); MODULE_PARM_DESC(max_dcc_channels, "max number of expected DCC channels per IRC session"); @@ -240,7 +240,7 @@ static int help(struct sk_buff **pskb, } static struct ip_conntrack_helper irc_helpers[MAX_PORTS]; -static char irc_names[MAX_PORTS][10]; +static char irc_names[MAX_PORTS][sizeof("irc-65535")]; static void fini(void); diff --git a/net/ipv4/netfilter/ip_conntrack_tftp.c b/net/ipv4/netfilter/ip_conntrack_tftp.c index d2b5905..a78736b 100644 --- a/net/ipv4/netfilter/ip_conntrack_tftp.c +++ b/net/ipv4/netfilter/ip_conntrack_tftp.c @@ -26,9 +26,9 @@ MODULE_DESCRIPTION("tftp connection tracking helper"); MODULE_LICENSE("GPL"); #define MAX_PORTS 8 -static int ports[MAX_PORTS]; +static short ports[MAX_PORTS]; static int ports_c; -module_param_array(ports, int, &ports_c, 0400); +module_param_array(ports, short, &ports_c, 0400); MODULE_PARM_DESC(ports, "port numbers of tftp servers"); #if 0 @@ -100,7 +100,7 @@ static int tftp_help(struct sk_buff **pskb, } static struct ip_conntrack_helper tftp[MAX_PORTS]; -static char tftp_names[MAX_PORTS][10]; +static char tftp_names[MAX_PORTS][sizeof("tftp-65535")]; static void fini(void) { -- 2.7.4