| From c22d38baefc5a7a1e1f5cdc9dbb556b1f0ec5c57 Mon Sep 17 00:00:00 2001 |
| From: Nick Clifton <nickc@redhat.com> |
| Date: Thu, 30 Mar 2023 10:10:09 +0100 |
| Subject: [PATCH] Fix an illegal memory access when an accessing a |
| zer0-lengthverdef table. |
| |
| PR 30285 |
| * elf.c (_bfd_elf_slurp_version_tables): Fail if no version definitions are allocated. |
| --- |
| bfd/elf.c | 5 +++++ |
| 1 files changed, 5 insertions(+) |
| |
| diff --git a/bfd/elf.c b/bfd/elf.c |
| index 027d0143735..185028cbd97 100644 |
| --- a/bfd/elf.c |
| +++ b/bfd/elf.c |
| @@ -9030,6 +9030,9 @@ _bfd_elf_slurp_version_tables (bfd *abfd, bool default_imported_symver) |
| bfd_set_error (bfd_error_file_too_big); |
| goto error_return_verdef; |
| } |
| + |
| + if (amt == 0) |
| + goto error_return_verdef; |
| elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *) bfd_zalloc (abfd, amt); |
| if (elf_tdata (abfd)->verdef == NULL) |
| goto error_return_verdef; |
| @@ -9133,6 +9136,8 @@ _bfd_elf_slurp_version_tables (bfd *abfd, bool default_imported_symver) |
| bfd_set_error (bfd_error_file_too_big); |
| goto error_return; |
| } |
| + if (amt == 0) |
| + goto error_return; |
| elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *) bfd_zalloc (abfd, amt); |
| if (elf_tdata (abfd)->verdef == NULL) |
| goto error_return; |
| -- |
| 2.39.3 |
| |
