From ea2994dd4c9b06e270ced1825fb422e4f8fdc2a6 Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@gmail.com>
Date: Mon, 3 Jul 2023 11:01:42 -0700
Subject: [PATCH] xtensa: ISS: fix call to split_if_spec
commit bc8d5916541fa19ca5bc598eb51a5f78eb891a36 upstream.
split_if_spec expects a NULL-pointer as an end marker for the argument
list, but tuntap_probe never supplied that terminating NULL. As a result
incorrectly formatted interface specification string may cause a crash
because of the random memory access. Fix that by adding NULL terminator
to the split_if_spec argument list.
Cc: stable@vger.kernel.org
Fixes: 7282bee78798 ("[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 8")
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/xtensa/platforms/iss/network.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/xtensa/platforms/iss/network.c b/arch/xtensa/platforms/iss/network.c
index d027dddc41ca..f49329aabec8 100644
--- a/arch/xtensa/platforms/iss/network.c
+++ b/arch/xtensa/platforms/iss/network.c
@@ -236,7 +236,7 @@ static int tuntap_probe(struct iss_net_private *lp, int index, char *init)
init += sizeof(TRANSPORT_TUNTAP_NAME) - 1;
if (*init == ',') {
- rem = split_if_spec(init + 1, &mac_str, &dev_name);
+ rem = split_if_spec(init + 1, &mac_str, &dev_name, NULL);
if (rem != NULL) {
pr_err("%s: extra garbage on specification : '%s'\n",
dev->name, rem);