linux-kernel - [PATCH][next] bpf: fix memory leak on object 'data'

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Message-Id: <20191118114059.37287-1-colin.king@canonical.com>
Date:   Mon, 18 Nov 2019 11:40:59 +0000
From:   Colin King <colin.king@...onical.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] bpf: fix memory leak on object 'data'

From: Colin Ian King <colin.king@...onical.com>

The error return path on when bpf_fentry_test* tests fail does not
kfree 'data'. Fix this by adding the missing kfree.

Addresses-Coverity: ("Resource leak")
Fixes: faeb2dce084a ("bpf: Add kernel test functions for fentry testing")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 net/bpf/test_run.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c
index 62933279fbba..915c2d6f7fb9 100644
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
@@ -161,8 +161,10 @@ static void *bpf_test_init(const union bpf_attr *kattr, u32 size,
 	    bpf_fentry_test3(4, 5, 6) != 15 ||
 	    bpf_fentry_test4((void *)7, 8, 9, 10) != 34 ||
 	    bpf_fentry_test5(11, (void *)12, 13, 14, 15) != 65 ||
-	    bpf_fentry_test6(16, (void *)17, 18, 19, (void *)20, 21) != 111)
+	    bpf_fentry_test6(16, (void *)17, 18, 19, (void *)20, 21) != 111) {
+		kfree(data);
 		return ERR_PTR(-EFAULT);
+	}
 	return data;
 }
 
-- 
2.24.0