From eb77f6a4621795367a39cdd30957903af9dbb815 Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Sat, 27 Jan 2018 08:19:33 +1030 Subject: [PATCH] PR22741, objcopy segfault on fuzzed COFF object PR 22741 * coffgen.c (coff_pointerize_aux): Ensure auxent tagndx is in range before converting to a symbol table pointer. --- bfd/coffgen.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/bfd/coffgen.c b/bfd/coffgen.c index b2410873d0..4f90eaddd9 100644 --- a/bfd/coffgen.c +++ b/bfd/coffgen.c @@ -1555,7 +1555,8 @@ coff_pointerize_aux (bfd *abfd, } /* A negative tagndx is meaningless, but the SCO 3.2v4 cc can generate one, so we must be careful to ignore it. */ - if (auxent->u.auxent.x_sym.x_tagndx.l > 0) + if ((unsigned long) auxent->u.auxent.x_sym.x_tagndx.l + < obj_raw_syment_count (abfd)) { auxent->u.auxent.x_sym.x_tagndx.p = table_base + auxent->u.auxent.x_sym.x_tagndx.l; -- 2.16.2