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

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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: Vincent Li <vincent.mc.li@gmail.com>
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Hengqi Chen 2025-10-02 22:39:53 +08:00 committed by Huacai Chen
parent ea645cfd3d
commit de2c0b7788
1 changed files with 4 additions and 1 deletions
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5
arch/loongarch/net/bpf_jit.c
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@ -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;
}