36 lines
1.4 KiB
Diff
36 lines
1.4 KiB
Diff
From 54025d5812ff100f5f0654eb7e1ffd50f2e37f5f Mon Sep 17 00:00:00 2001
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From: Alan Modra <amodra@gmail.com>
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Date: Mon, 31 Dec 2018 15:40:08 +1030
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Subject: [PATCH] PR24041, Invalid Memory Address Dereference in
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elf_link_add_object_symbols
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PR 24041
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* elflink.c (elf_link_add_object_symbols): Don't segfault on
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crafted ET_DYN with no program headers.
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---
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diff -urNp a/bfd/ChangeLog b/bfd/ChangeLog
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--- a/bfd/ChangeLog 2019-06-06 00:21:45.780000000 +0800
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+++ b/bfd/ChangeLog 2019-06-06 00:23:26.300000000 +0800
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@@ -1,3 +1,8 @@
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+2018-12-31 Alan Modra <amodra@gmail.com>
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+ PR 24041
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+ * elflink.c (elf_link_add_object_symbols): Don't segfault on
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+ crafted ET_DYN with no program headers.
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+
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2018-09-20 Alan Modra <amodra@gmail.com>
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PR 23685
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* peXXigen.c (pe_print_edata): Correct export address table
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diff -urNp a/bfd/elflink.c b/bfd/elflink.c
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--- a/bfd/elflink.c 2019-06-06 00:21:45.770000000 +0800
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+++ b/bfd/elflink.c 2019-06-06 00:24:50.330000000 +0800
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@@ -4169,7 +4169,7 @@ error_free_dyn:
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all sections contained fully therein. This makes relro
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shared library sections appear as they will at run-time. */
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phdr = elf_tdata (abfd)->phdr + elf_elfheader (abfd)->e_phnum;
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- while (--phdr >= elf_tdata (abfd)->phdr)
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+ while (phdr-- > elf_tdata (abfd)->phdr)
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if (phdr->p_type == PT_GNU_RELRO)
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{
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for (s = abfd->sections; s != NULL; s = s->next)
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