fix memory free operation after send_ioctl call fails

(cherry picked from commit 1bc06adc70b19109ba058ac12f96d746c886c356)

backport-ioctl-add-the-memory-free-operation-after-send_ioctl.patch

@@ -0,0 +1,40 @@
+From 8fd02a2f5bd552894ef415b7e5c525be6bc6c3e3 Mon Sep 17 00:00:00 2001
+From: Jie Wang <wangjie125@huawei.com>
+Date: Mon, 7 Mar 2022 16:08:56 +0800
+Subject: [PATCH] ioctl: add the memory free operation after send_ioctl call
+ fails
+
+The memory is not freed after send_ioctl fails in function do_gtunable and
+do_stunable. This will cause memory leaks.
+
+So this patch adds memory free operation after send_ioctl call fails.
+
+Fixes: b717ed22d984 ("ethtool: add support for get/set ethtool_tunable")
+Signed-off-by: Jie Wang <wangjie125@huawei.com>
+---
+ ethtool.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/ethtool.c b/ethtool.c
+index 28ecf69..4f5c234 100644
+--- a/ethtool.c
++++ b/ethtool.c
+@@ -5097,6 +5097,7 @@ static int do_stunable(struct cmd_context *ctx)
+ 		ret = send_ioctl(ctx, tuna);
+ 		if (ret) {
+ 			perror(tunable_strings[tuna->id]);
++			free(tuna);
+ 			return ret;
+ 		}
+ 		free(tuna);
+@@ -5174,6 +5175,7 @@ static int do_gtunable(struct cmd_context *ctx)
+ 			ret = send_ioctl(ctx, tuna);
+ 			if (ret) {
+ 				fprintf(stderr, "%s: Cannot get tunable\n", ts);
++				free(tuna);
+ 				return ret;
+ 			}
+ 			print_tunable(tuna);
+-- 
+2.33.0
+

ethtool.spec

@@ -1,12 +1,13 @@
 Name:		ethtool
 Epoch:		2
 Version:	5.15
-Release:	1
+Release:	2
 Summary:	Settings tool for Ethernet NICs
 License:	GPLv2
 URL:		https://www.kernel.org/pub/software/network/ethtool
 Source0:	https://www.kernel.org/pub/software/network/%{name}/%{name}-%{version}.tar.xz
 
+Patch0:         backport-ioctl-add-the-memory-free-operation-after-send_ioctl.patch
 
 BuildRequires:	gcc
 BuildRequires:	libmnl-devel
@@ -54,6 +55,12 @@ make check
 %{_mandir}/man8/%{name}.8*
 
 %changelog
+* Fri Sep 02 2022 gaihuiying <eaglgai@163.com> - 2:5.15-2
+- Type:bugfix
+- Id:NA
+- SUG:NA
+- DESC:fix memory free operation after send_ioctl call fails
+
 * Sat Mar 19 2022 xihaochen <xihaochen@h-partners.com> - 2:5.15-1
 - Type:requirement
 - Id:NA