The make_parent_dir is called without null-pointer checking for path, such as bpf_link__pin. To ensure there is no null-pointer dereference in make_parent_dir, so make_parent_dir requires additional null-pointer checking for path. Signed-off-by: Gaosheng Cui <cuigaosheng1@xxxxxxxxxx> --- tools/lib/bpf/libbpf.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index b53e51884f9e..5786e6184bf5 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -7634,6 +7634,9 @@ static int make_parent_dir(const char *path) char *dname, *dir; int err = 0; + if (path == NULL) + return -EINVAL; + dname = strdup(path); if (dname == NULL) return -ENOMEM; -- 2.25.1
