[PATCH v8 bpf-next 4/9] bpf: use prog->jited_len in bpf_prog_ksym_set_addr()

Song Liu
2022-02-01T06:31:21Z

Using prog->jited_len is simpler and more accurate than current
estimation (header + header->size).

Signed-off-by: Song Liu <song@kernel.org>
---
kernel/bpf/core.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 14199228a6f0..e3fe53df0a71 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -537,13 +537,10 @@ long bpf_jit_limit_max __read_mostly;
static void
bpf_prog_ksym_set_addr(struct bpf_prog *prog)
{
- const struct bpf_binary_header *hdr = bpf_jit_binary_hdr(prog);
- unsigned long addr = (unsigned long)hdr;
-
WARN_ON_ONCE(!bpf_prog_ebpf_jited(prog));

prog->aux->ksym.start = (unsigned long) prog->bpf_func;
- prog->aux->ksym.end = addr + hdr->size;
+ prog->aux->ksym.end = prog->aux->ksym.start + prog->jited_len;
}

static void
--
2.30.2