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-rw-r--r--net/netfilter/nf_conntrack_irc.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/net/netfilter/nf_conntrack_irc.c b/net/netfilter/nf_conntrack_irc.c
index 1b1226d6653..20633fdf7e6 100644
--- a/net/netfilter/nf_conntrack_irc.c
+++ b/net/netfilter/nf_conntrack_irc.c
@@ -68,11 +68,21 @@ static const char *const dccprotos[] = {
static int parse_dcc(char *data, const char *data_end, u_int32_t *ip,
u_int16_t *port, char **ad_beg_p, char **ad_end_p)
{
+ char *tmp;
+
/* at least 12: "AAAAAAAA P\1\n" */
while (*data++ != ' ')
if (data > data_end - 12)
return -1;
+ /* Make sure we have a newline character within the packet boundaries
+ * because simple_strtoul parses until the first invalid character. */
+ for (tmp = data; tmp <= data_end; tmp++)
+ if (*tmp == '\n')
+ break;
+ if (tmp > data_end || *tmp != '\n')
+ return -1;
+
*ad_beg_p = data;
*ip = simple_strtoul(data, &data, 10);