[PATCH v2] selftests/bpf: Fix memory leak in msg_alloc_iov error path

[Malaya Kumar Rout <malayarout91@gmail.com>]

In msg_alloc_iov(), when calloc() fails for an individual iov_base
allocation, the error path frees all previously allocated iov_base
entries but fails to free the iov array itself that was allocated
with calloc() at the beginning of the function. This results in a
memory leak of the iov array.

Add free(iov) in the unwind_iov error path to ensure proper cleanup
of all allocated memory.

Fixes: 753fb2ee0934 ("bpf: sockmap, add msg_peek tests to test_sockmap")
Signed-off-by: Malaya Kumar Rout <malayarout91@gmail.com>
---
 tools/testing/selftests/bpf/test_sockmap.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index ac814eb63edb..3e6be455d158 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -436,6 +436,7 @@ static int msg_alloc_iov(struct msghdr *msg,
 unwind_iov:
 	for (i--; i >= 0 ; i--)
 		free(msg->msg_iov[i].iov_base);
+	free(iov);
 	return -ENOMEM;
 }
 
-- 
2.54.0