Commit e58c5c97 authored by Haowen Bai's avatar Haowen Bai Committed by Andrii Nakryiko
Browse files

libbpf: Potential NULL dereference in usdt_manager_attach_usdt() 



link could be null but still dereference bpf_link__destroy(&link->link)
and it will lead to a null pointer access.

Signed-off-by: default avatarHaowen Bai <baihaowen@meizu.com>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/1649299098-2069-1-git-send-email-baihaowen@meizu.com
parent 502b0e3d

tools/lib/bpf/usdt.c

+2 −2
Original line number Diff line number Diff line
@@ -1071,8 +1071,8 @@ struct bpf_link *usdt_manager_attach_usdt(struct usdt_manager *man, const struct 
	return &link->link;



err_out:

	if (link)

		bpf_link__destroy(&link->link);



	free(targets);

	hashmap__free(specs_hash);

	if (elf)