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