| From 5c831a3c7f3ca98d6aba1200353311e1a1f84c70 Mon Sep 17 00:00:00 2001 |
| From: Nick Clifton <nickc@redhat.com> |
| Date: Wed, 19 Oct 2022 15:09:12 +0100 |
| Subject: [PATCH] Fix an illegal memory access when parsing an ELF file |
| containing corrupt symbol version information. |
| |
| PR 29699 |
| * elf.c (_bfd_elf_slurp_version_tables): Fail if the sh_info field |
| of the section header is zero. |
| |
| Upstream-Status: Backport |
| [https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=5c831a3c7f3ca98d6aba1200353311e1a1f84c70] |
| |
| Signed-off-by: Pgowda <pgowda.cve@gmail.com> |
| --- |
| bfd/ChangeLog | 6 ++++++ |
| bfd/elf.c | 4 +++- |
| 2 files changed, 9 insertions(+), 1 deletion(-) |
| |
| diff --git a/bfd/elf.c b/bfd/elf.c |
| index fe00e0f9189..7cd7febcf95 100644 |
| --- a/bfd/elf.c |
| +++ b/bfd/elf.c |
| @@ -8918,7 +8918,9 @@ _bfd_elf_slurp_version_tables (bfd *abfd, bool default_imported_symver) |
| bfd_set_error (bfd_error_file_too_big); |
| goto error_return_verref; |
| } |
| - elf_tdata (abfd)->verref = (Elf_Internal_Verneed *) bfd_alloc (abfd, amt); |
| + if (amt == 0) |
| + goto error_return_verref; |
| + elf_tdata (abfd)->verref = (Elf_Internal_Verneed *) bfd_zalloc (abfd, amt); |
| if (elf_tdata (abfd)->verref == NULL) |
| goto error_return_verref; |
| |
| -- |
| 2.31.1 |
| |