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For some binaries we can get a invalid section alignment, for example if
sh_align = 1 and sh_addralign is 0. In the case of a zero size section like
".note.GNU-stack", this is irrelavent as far as I can tell and we shouldn't
error in this case.
RP 2014/6/11
Upstream-Status: Pending
diff --git a/libelf/elf32_updatenull.c b/libelf/elf32_updatenull.c
--- a/libelf/elf32_updatenull.c
+++ b/libelf/elf32_updatenull.c
@@ -339,8 +339,8 @@ __elfw2(LIBELFBITS,updatenull_wrlock) (Elf *elf, int *change_bop, size_t shnum)
we test for the alignment of the section being large
enough for the largest alignment required by a data
block. */
- if (unlikely (! powerof2 (shdr->sh_addralign))
- || unlikely ((shdr->sh_addralign ?: 1) < sh_align))
+ if (shdr->sh_size && (unlikely (! powerof2 (shdr->sh_addralign))
+ || unlikely ((shdr->sh_addralign ?: 1) < sh_align)))
{
__libelf_seterrno (ELF_E_INVALID_ALIGN);
return -1;
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