From: Peter Jones <pjo...@redhat.com>
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 <pjo...@redhat.com>
Signed-off-by: Jan Setje-Eilers <jan.setjeeil...@oracle.com>
Signed-off-by: Mate Kukri <mate.ku...@canonical.com>
Reviewed-By: Vladimir Serbinenko
---
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 0bf40caa6..37db9fab0 100644
--- a/grub-core/kern/dl.c
+++ b/grub-core/kern/dl.c
@@ -237,6 +237,9 @@ 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;
--
2.39.2
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