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libbpf: Fix huge memory leak in libbpf_find_vmlinux_btf_id()
author
Andrii Nakryiko
<andriin@fb.com>
Wed, 29 Apr 2020 01:21:08 +0000
(18:21 -0700)
committer
Alexei Starovoitov
<ast@kernel.org>
Wed, 29 Apr 2020 02:48:05 +0000
(19:48 -0700)
BTF object wasn't freed.
Fixes: a6ed02cac690 ("libbpf: Load btf_vmlinux only once per object.")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Cc: KP Singh <kpsingh@google.com>
Link:
https://lore.kernel.org/bpf/20200429012111.277390-9-andriin@fb.com
tools/lib/bpf/libbpf.c
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diff --git
a/tools/lib/bpf/libbpf.c
b/tools/lib/bpf/libbpf.c
index 445ee903f9cdb2ac0241c7b544c47336ccc3164c..d86ff8214b9674dcc6af269cbd710760af46fe6d 100644
(file)
--- a/
tools/lib/bpf/libbpf.c
+++ b/
tools/lib/bpf/libbpf.c
@@
-6934,6
+6934,7
@@
int libbpf_find_vmlinux_btf_id(const char *name,
enum bpf_attach_type attach_type)
{
struct btf *btf;
+ int err;
btf = libbpf_find_kernel_btf();
if (IS_ERR(btf)) {
@@
-6941,7
+6942,9
@@
int libbpf_find_vmlinux_btf_id(const char *name,
return -EINVAL;
}
- return __find_vmlinux_btf_id(btf, name, attach_type);
+ err = __find_vmlinux_btf_id(btf, name, attach_type);
+ btf__free(btf);
+ return err;
}
static int libbpf_find_prog_btf_id(const char *name, __u32 attach_prog_fd)