linux-kernel - [PATCH 5.15 541/917] selftests/bpf: Fix memory leak in test

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Message-Id: <20211115165447.103554216@linuxfoundation.org>
Date:   Mon, 15 Nov 2021 18:00:36 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Kumar Kartikeya Dwivedi <memxor@...il.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Andrii Nakryiko <andrii@...nel.org>,
        Song Liu <songliubraving@...com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 541/917] selftests/bpf: Fix memory leak in test_ima

From: Kumar Kartikeya Dwivedi <memxor@...il.com>

[ Upstream commit efadf2ad17a2d5dc90bda4e6e8b2f96af4c62dae ]

The allocated ring buffer is never freed, do so in the cleanup path.

Fixes: f446b570ac7e ("bpf/selftests: Update the IMA test to use BPF ring buffer")
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@...il.com>
Signed-off-by: Alexei Starovoitov <ast@...nel.org>
Acked-by: Andrii Nakryiko <andrii@...nel.org>
Acked-by: Song Liu <songliubraving@...com>
Link: https://lore.kernel.org/bpf/20211028063501.2239335-9-memxor@gmail.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 tools/testing/selftests/bpf/prog_tests/test_ima.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/test_ima.c b/tools/testing/selftests/bpf/prog_tests/test_ima.c
index 0252f61d611a9..97d8a6f84f4ab 100644
--- a/tools/testing/selftests/bpf/prog_tests/test_ima.c
+++ b/tools/testing/selftests/bpf/prog_tests/test_ima.c
@@ -43,7 +43,7 @@ static int process_sample(void *ctx, void *data, size_t len)
 void test_test_ima(void)
 {
 	char measured_dir_template[] = "/tmp/ima_measuredXXXXXX";
-	struct ring_buffer *ringbuf;
+	struct ring_buffer *ringbuf = NULL;
 	const char *measured_dir;
 	char cmd[256];
 
@@ -85,5 +85,6 @@ close_clean:
 	err = system(cmd);
 	CHECK(err, "failed to run command", "%s, errno = %d\n", cmd, errno);
 close_prog:
+	ring_buffer__free(ringbuf);
 	ima__destroy(skel);
 }
-- 
2.33.0