[PATCH bpf-next v4 2/3] libbpf: Fix the possible memory leak on error

[Shuyi Cheng]

If the strdup() fails then we need to call bpf_object__close(obj) to
avoid a resource leak.

Fixes: 166750b ("libbpf: Support libbpf-provided extern variables")

Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Shuyi Cheng <chengshuyi@xxxxxxxxxxxxxxxxx>
---
 tools/lib/bpf/libbpf.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 6e11a7b..9d80794 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -7611,8 +7611,10 @@ int bpf_program__load(struct bpf_program *prog, char *license, __u32 kern_ver)
 	kconfig = OPTS_GET(opts, kconfig, NULL);
 	if (kconfig) {
 		obj->kconfig = strdup(kconfig);
-		if (!obj->kconfig)
-			return ERR_PTR(-ENOMEM);
+		if (!obj->kconfig) {
+			err = -ENOMEM;
+			goto out;
+		}
 	}
 
 	err = bpf_object__elf_init(obj);
-- 
1.8.3.1