37 lines
1.4 KiB
Diff
37 lines
1.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Peter Jones <pjones@redhat.com>
|
|
Date: Mon, 21 Mar 2022 16:56:10 -0400
|
|
Subject: [PATCH] modules: Don't allocate space for non-allocable sections.
|
|
|
|
Currently when loading grub modules, we allocate space for all sections,
|
|
including those without SHF_ALLOC set. We then copy the sections that
|
|
/do/ have SHF_ALLOC set into the allocated memory, leaving some of our
|
|
allocation untouched forever. Additionally, on platforms with GOT
|
|
fixups and trampolines, we currently compute alignment round-ups for the
|
|
sections and sections with sh_size = 0.
|
|
|
|
This patch removes the extra space from the allocation computation, and
|
|
makes the allocation computation loop skip empty sections as the loading
|
|
loop does.
|
|
|
|
Signed-off-by: Peter Jones <pjones@redhat.com>
|
|
(cherry picked from commit 03215e342f552396ab08125ea769b1e166417ec1)
|
|
---
|
|
grub-core/kern/dl.c | 3 +++
|
|
1 file changed, 3 insertions(+)
|
|
|
|
diff --git a/grub-core/kern/dl.c b/grub-core/kern/dl.c
|
|
index f304494574..aef8af8aa7 100644
|
|
--- a/grub-core/kern/dl.c
|
|
+++ b/grub-core/kern/dl.c
|
|
@@ -289,6 +289,9 @@ grub_dl_load_segments (grub_dl_t mod, const Elf_Ehdr *e)
|
|
i < e->e_shnum;
|
|
i++, s = (const Elf_Shdr *)((const char *) s + e->e_shentsize))
|
|
{
|
|
+ if (s->sh_size == 0 || !(s->sh_flags & SHF_ALLOC))
|
|
+ continue;
|
|
+
|
|
tsize = ALIGN_UP (tsize, s->sh_addralign) + s->sh_size;
|
|
if (talign < s->sh_addralign)
|
|
talign = s->sh_addralign;
|