diff mbox series

[bpf-next,1/2] selftests/bpf: Free strdup memory in test_sockmap

Message ID b76f2f4c550aebe4ab8ea73d23c4cbe4f06ea996.1714374022.git.tanggeliang@kylinos.cn (mailing list archive)
State Accepted
Commit 237c522c1d5d19e8d3057a38ce690c753020c7d1
Delegated to: BPF
Headers show
Series Free strdup memory in selftests | expand

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netdev/fixes_present success Fixes tag not required for -next series
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netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
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Commit Message

Geliang Tang April 29, 2024, 7:07 a.m. UTC 
From: Geliang Tang <tanggeliang@kylinos.cn>

The strdup() function returns a pointer to a new string which is a
duplicate of the string "ptr". Memory for the new string is obtained
with malloc(), and need to be freed with free().

This patch adds these missing "free(ptr)" in check_whitelist() and
check_blacklist() to avoid memory leaks in test_sockmap.c.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
---
 tools/testing/selftests/bpf/test_sockmap.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

Comments

Yonghong Song April 29, 2024, 3:53 p.m. UTC | #1 
On 4/29/24 12:07 AM, Geliang Tang wrote:
> From: Geliang Tang <tanggeliang@kylinos.cn>
>
> The strdup() function returns a pointer to a new string which is a
> duplicate of the string "ptr". Memory for the new string is obtained
> with malloc(), and need to be freed with free().
>
> This patch adds these missing "free(ptr)" in check_whitelist() and
> check_blacklist() to avoid memory leaks in test_sockmap.c.
>
> Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
John Fastabend April 29, 2024, 7:56 p.m. UTC | #2 
Geliang Tang wrote:
> From: Geliang Tang <tanggeliang@kylinos.cn>
> 
> The strdup() function returns a pointer to a new string which is a
> duplicate of the string "ptr". Memory for the new string is obtained
> with malloc(), and need to be freed with free().
> 
> This patch adds these missing "free(ptr)" in check_whitelist() and
> check_blacklist() to avoid memory leaks in test_sockmap.c.
> 
> Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
> ---

Acked-by: John Fastabend <john.fastabend@gmail.com>
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 43612de44fbf..92752f5eeded 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -1887,10 +1887,13 @@  static int check_whitelist(struct _test *t, struct sockmap_options *opt)
 	while (entry) {
 		if ((opt->prepend && strstr(opt->prepend, entry) != 0) ||
 		    strstr(opt->map, entry) != 0 ||
-		    strstr(t->title, entry) != 0)
+		    strstr(t->title, entry) != 0) {
+			free(ptr);
 			return 0;
+		}
 		entry = strtok(NULL, ",");
 	}
+	free(ptr);
 	return -EINVAL;
 }
 
@@ -1907,10 +1910,13 @@  static int check_blacklist(struct _test *t, struct sockmap_options *opt)
 	while (entry) {
 		if ((opt->prepend && strstr(opt->prepend, entry) != 0) ||
 		    strstr(opt->map, entry) != 0 ||
-		    strstr(t->title, entry) != 0)
+		    strstr(t->title, entry) != 0) {
+			free(ptr);
 			return 0;
+		}
 		entry = strtok(NULL, ",");
 	}
+	free(ptr);
 	return -EINVAL;
 }