From ab419ddbb2cdd17ca83618990f2cacf904ce1d61 Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Tue, 23 Oct 2018 18:29:24 +1030 Subject: [PATCH] PR23804, buffer overflow in sec_merge_hash_lookup PR 23804 * merge.c (_bfd_add_merge_section): Don't attempt to merge sections where size is not a multiple of entsize. Upstream-Status: Backport CVE: CVE-2018-18605 Signed-off-by: Zhixiong Chi --- bfd/ChangeLog | 6 ++++++ bfd/merge.c | 3 +++ 2 files changed, 9 insertions(+) --- a/bfd/merge.c +++ b/bfd/merge.c @@ -376,6 +376,9 @@ _bfd_add_merge_section (bfd *abfd, void || sec->entsize == 0) return TRUE; + if (sec->size % sec->entsize != 0) + return TRUE; + if ((sec->flags & SEC_RELOC) != 0) { /* We aren't prepared to handle relocations in merged sections. */