Patch "selftests/bpf: Fix memory leak in test_ima" has been added to the 5.14-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    selftests/bpf: Fix memory leak in test_ima

to the 5.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     selftests-bpf-fix-memory-leak-in-test_ima.patch
and it can be found in the queue-5.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit e2a028db7bbdba52018b50be81d70be9447ff061
Author: Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx>
Date:   Thu Oct 28 12:05:01 2021 +0530

    selftests/bpf: Fix memory leak in test_ima
    
    [ 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@xxxxxxxxx>
    Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx>
    Acked-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
    Acked-by: Song Liu <songliubraving@xxxxxx>
    Link: https://lore.kernel.org/bpf/20211028063501.2239335-9-memxor@xxxxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

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);
 }