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Message-ID: <20220201062803.2675204-5-song@kernel.org>
Date: Mon, 31 Jan 2022 22:27:58 -0800
From: Song Liu <song@...nel.org>
To: <bpf@...r.kernel.org>, <netdev@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
CC: <ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>,
<kernel-team@...com>, <peterz@...radead.org>, <x86@...nel.org>,
<iii@...ux.ibm.com>, Song Liu <song@...nel.org>
Subject: [PATCH v8 bpf-next 4/9] bpf: use prog->jited_len in bpf_prog_ksym_set_addr()
Using prog->jited_len is simpler and more accurate than current
estimation (header + header->size).
Signed-off-by: Song Liu <song@...nel.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
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