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PR27860, Segmentation fault on readelf -w

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Well it didn't take long for the SAFE_BYTE_GET assert to trigger.

	PR 27860
	* dwarf.c (display_debug_frames): Sanity check cie_off before
	attempting to read cie.
This commit is contained in:
Alan Modra
2021-05-13 22:22:45 +09:30
parent 0746f49b1d
commit d21f875d67
2 changed files with 8 additions and 0 deletions
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6
binutils/ChangeLog
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@ -1,3 +1,9 @@
2021-05-13 Alan Modra <amodra@gmail.com>
PR 27860
* dwarf.c (display_debug_frames): Sanity check cie_off before
attempting to read cie.
2021-05-12 Alan Modra <amodra@gmail.com> 2021-05-12 Alan Modra <amodra@gmail.com>
* dwarf.c (process_extended_line_op): Don't bump data pointer past * dwarf.c (process_extended_line_op): Don't bump data pointer past

2
binutils/dwarf.c
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@ -8708,6 +8708,8 @@ display_debug_frames (struct dwarf_section *section,
if (cie->chunk_start == look_for) if (cie->chunk_start == look_for)
break; break;
} }
else if (cie_off >= section->size)
cie = NULL;
else else
{ {
for (cie = forward_refs; cie ; cie = cie->next) for (cie = forward_refs; cie ; cie = cie->next)