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commit 04b31182bf3f8a1a76e995bdfaaaab4c009b9cb2
Author: Nick Clifton <nickc@redhat.com>
Date: Wed Apr 26 16:30:22 2017 +0100
Fix a seg-fault when processing a corrupt binary containing reloc(s) with negative addresses.
PR binutils/21434
* reloc.c (bfd_perform_relocation): Check for a negative address
in the reloc.
Upstream-Status: Backport
CVE: CVE-2017-8397
Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
Index: git/bfd/reloc.c
===================================================================
--- git.orig/bfd/reloc.c 2017-09-04 18:06:00.651987605 +0530
+++ git/bfd/reloc.c 2017-09-04 18:06:10.740066291 +0530
@@ -623,7 +623,10 @@
PR 17512: file: c146ab8b, 46dff27f, 38e53ebf. */
octets = reloc_entry->address * bfd_octets_per_byte (abfd);
if (octets + bfd_get_reloc_size (howto)
- > bfd_get_section_limit_octets (abfd, input_section))
+ > bfd_get_section_limit_octets (abfd, input_section)
+ /* Check for an overly large offset which
+ masquerades as a negative value too. */
+ || (octets + bfd_get_reloc_size (howto) < bfd_get_reloc_size (howto)))
return bfd_reloc_outofrange;
/* Work out which section the relocation is targeted at and the
Index: git/bfd/ChangeLog
===================================================================
--- git.orig/bfd/ChangeLog 2017-09-04 18:06:10.684065855 +0530
+++ git/bfd/ChangeLog 2017-09-04 18:08:33.845183050 +0530
@@ -75,6 +75,12 @@
2017-04-26 Nick Clifton <nickc@redhat.com>
+ PR binutils/21434
+ * reloc.c (bfd_perform_relocation): Check for a negative address
+ in the reloc.
+
+2017-04-26 Nick Clifton <nickc@redhat.com>
+
PR binutils/21431
* compress.c (bfd_init_section_compress_status): Check the return
value from bfd_malloc.
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