ethtool/SOURCES/0018-fix-memory-leaks-in-do_sfeatures.patch
2021-09-09 16:24:41 +00:00

61 lines
1.7 KiB
Diff

From 78b5b29e6cf286ce687e7b4d42745fb06cfb2353 Mon Sep 17 00:00:00 2001
From: Ivan Vecera <ivecera@redhat.com>
Date: Fri, 25 Sep 2020 08:39:16 +0200
Subject: [PATCH 18/19] fix memory leaks in do_sfeatures()
Memory blocks referenced by new_state and old_state are never freed.
For efeatures there is no need to check pointer as free() can be called
with NULL parameter.
Fixes: 6042804cf6ec ("Change -k/-K options to use ETHTOOL_{G,S}FEATURES")
Cc: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
---
ethtool.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/ethtool.c b/ethtool.c
index 2e24e98187d2..32ef80add923 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -2392,9 +2392,10 @@ static int do_sfeatures(struct cmd_context *ctx)
int any_changed = 0, any_mismatch = 0;
u32 off_flags_wanted = 0;
u32 off_flags_mask = 0;
- struct ethtool_sfeatures *efeatures;
+ struct ethtool_sfeatures *efeatures = NULL;
+ struct feature_state *old_state = NULL;
+ struct feature_state *new_state = NULL;
struct cmdline_info *cmdline_features;
- struct feature_state *old_state, *new_state;
struct ethtool_value eval;
unsigned int i, j;
int err, rc;
@@ -2418,8 +2419,6 @@ static int do_sfeatures(struct cmd_context *ctx)
memset(efeatures->features, 0,
FEATURE_BITS_TO_BLOCKS(defs->n_features) *
sizeof(efeatures->features[0]));
- } else {
- efeatures = NULL;
}
/* Generate cmdline_info for legacy flags and kernel-named
@@ -2578,9 +2577,11 @@ static int do_sfeatures(struct cmd_context *ctx)
rc = 0;
err:
+ free(new_state);
+ free(old_state);
free(defs);
- if (efeatures)
- free(efeatures);
+ free(efeatures);
+
return rc;
}
--
2.26.2