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From 858976b1fc3107f1261aae337831959b511b83c2 Mon Sep 17 00:00:00 2001
From: Paul Mackerras <paulus@ozlabs.org>
Date: Sat, 4 Jan 2020 12:01:32 +1100
Subject: [PATCH] radius: Prevent buffer overflow in rc_mksid()
On some systems getpid() can return a value greater than 65535.
Increase the size of buf[] to allow for this, and use slprintf()
to make sure we never overflow it.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
---
pppd/plugins/radius/util.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/pppd/plugins/radius/util.c b/pppd/plugins/radius/util.c
index 6f976a7..740131e 100644
--- a/pppd/plugins/radius/util.c
+++ b/pppd/plugins/radius/util.c
@@ -73,9 +73,9 @@ void rc_mdelay(int msecs)
char *
rc_mksid (void)
{
- static char buf[15];
+ static char buf[32];
static unsigned short int cnt = 0;
- sprintf (buf, "%08lX%04X%02hX",
+ slprintf(buf, sizeof(buf), "%08lX%04X%02hX",
(unsigned long int) time (NULL),
(unsigned int) getpid (),
cnt & 0xFF);
--
2.24.1
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