Commit de2c0b77 authored by Hengqi Chen's avatar Hengqi Chen Committed by Huacai Chen
Browse files

LoongArch: BPF: Make error handling robust in arch_prepare_bpf_trampoline() 



Bail out instead of trying to perform a bpf_arch_text_copy() if
__arch_prepare_bpf_trampoline() failed.

Cc: stable@vger.kernel.org
Tested-by: default avatarVincent Li <vincent.mc.li@gmail.com>
Signed-off-by: default avatarHengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent ea645cfd

arch/loongarch/net/bpf_jit.c

+4 −1
Original line number Diff line number Diff line
@@ -1715,7 +1715,10 @@ int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *ro_image, 


	jit_fill_hole(image, (unsigned int)(ro_image_end - ro_image));

	ret = __arch_prepare_bpf_trampoline(&ctx, im, m, tlinks, func_addr, flags);

	if (ret > 0 && validate_code(&ctx) < 0) {

	if (ret < 0)

		goto out;



	if (validate_code(&ctx) < 0) {

		ret = -EINVAL;

		goto out;

	}