bpf: Use kvmemdup to simplify the code

Use kvmemdup instead of kvmalloc() + memcpy() to simplify the
code.

No functional change intended.

Acked-by: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Link: https://lore.kernel.org/r/20240828062128.1223417-1-lihongbo22@huawei.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index edad152cee8eb4a3cccc6f12296721125a1e4790..1e29281653c62f9e2fbc9879c127cdc0561bf957 100644 (file)
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -6272,12 +6272,11 @@ static struct btf *btf_parse_module(const char *module_name, const void *data,
        btf->kernel_btf = true;
        snprintf(btf->name, sizeof(btf->name), "%s", module_name);
 
-       btf->data = kvmalloc(data_size, GFP_KERNEL | __GFP_NOWARN);
+       btf->data = kvmemdup(data, data_size, GFP_KERNEL | __GFP_NOWARN);
        if (!btf->data) {
                err = -ENOMEM;
                goto errout;
        }
-       memcpy(btf->data, data, data_size);
        btf->data_size = data_size;
 
        err = btf_parse_hdr(env);