irda: Fix parameter extraction stack overflow
Cc: stable@kernel.org
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
diff --git a/net/irda/parameters.c b/net/irda/parameters.c
index fc1a205..71cd38c 100644
--- a/net/irda/parameters.c
+++ b/net/irda/parameters.c
@@ -298,6 +298,8 @@
p.pi = pi; /* In case handler needs to know */
p.pl = buf[1]; /* Extract length of value */
+ if (p.pl > 32)
+ p.pl = 32;
IRDA_DEBUG(2, "%s(), pi=%#x, pl=%d\n", __func__,
p.pi, p.pl);
@@ -318,7 +320,7 @@
(__u8) str[0], (__u8) str[1]);
/* Null terminate string */
- str[p.pl+1] = '\0';
+ str[p.pl] = '\0';
p.pv.c = str; /* Handler will need to take a copy */