From: Pu Lehui <pulehui@xxxxxxxxxx> For trampoline using bpf_prog_pack, we need to generate a rw_image buffer with size of (image_end - image). For regular trampoline, we use the precise image size generated by arch_bpf_trampoline_size to allocate rw_image. But for struct_ops trampoline, we allocate rw_image directly using close to PAGE_SIZE size. We do not need to allocate for that much, as the patch size is usually much smaller than PAGE_SIZE. Let's use precise image size for it too. Signed-off-by: Pu Lehui <pulehui@xxxxxxxxxx> --- kernel/bpf/bpf_struct_ops.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/bpf/bpf_struct_ops.c b/kernel/bpf/bpf_struct_ops.c index 02068bd0e4d9..e2e1bf3c69a3 100644 --- a/kernel/bpf/bpf_struct_ops.c +++ b/kernel/bpf/bpf_struct_ops.c @@ -368,7 +368,7 @@ int bpf_struct_ops_prepare_trampoline(struct bpf_tramp_links *tlinks, return size; if (size > (unsigned long)image_end - (unsigned long)image) return -E2BIG; - return arch_prepare_bpf_trampoline(NULL, image, image_end, + return arch_prepare_bpf_trampoline(NULL, image, image + size, model, flags, tlinks, stub_func); } -- 2.34.1
