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libelf: elf_getshdrstrndx cannot use SHN_XINDEX without section headers.

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Signed-off-by: Mark Wielaard <mjw@redhat.com>
This commit is contained in:
Mark Wielaard
2014-11-17 00:42:53 +01:00
parent 436275edd0
commit babcdeff28
2 changed files with 20 additions and 0 deletions
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libelf/ChangeLog
+5
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@@ -1,3 +1,8 @@
2014-11-16 Mark Wielaard <mjw@redhat.com>
* elf_getshdrstrndx.c: Check there are section headers before
handling SHN_XINDEX.
2014-11-16 Mark Wielaard <mjw@redhat.com>
* elf32_getphdr.c (getphdr_wrlock): Check e_phoff isn't zero.
libelf/elf_getshdrstrndx.c
+15
View File
@@ -92,6 +92,13 @@ elf_getshdrstrndx (elf, dst)
if (elf->class == ELFCLASS32)
{
size_t offset;
if (unlikely (elf->state.elf32.scns.cnt == 0))
{
/* Cannot use SHN_XINDEX without section headers. */
__libelf_seterrno (ELF_E_INVALID_SECTION_HEADER);
result = -1;
goto out;
}
if (elf->state.elf32.scns.data[0].shdr.e32 != NULL)
{
@@ -146,6 +153,14 @@ elf_getshdrstrndx (elf, dst)
}
else
{
if (unlikely (elf->state.elf64.scns.cnt == 0))
{
/* Cannot use SHN_XINDEX without section headers. */
__libelf_seterrno (ELF_E_INVALID_SECTION_HEADER);
result = -1;
goto out;
}
if (elf->state.elf64.scns.data[0].shdr.e64 != NULL)
{
num = elf->state.elf64.scns.data[0].shdr.e64->sh_link;