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[binutils-gdb] PR22209, invalid memory read in find_abstract_instance_name
- From: sergiodj+buildbot at sergiodj dot net
- To: gdb-testers at sourceware dot org
- Date: Tue, 26 Sep 2017 09:04:57 -0400
- Subject: [binutils-gdb] PR22209, invalid memory read in find_abstract_instance_name
- Authentication-results: sourceware.org; auth=none
*** TEST RESULTS FOR COMMIT 1b86808a86077722ee4f42ff97f836b12420bb2a ***
Author: Alan Modra <amodra@gmail.com>
Branch: master
Commit: 1b86808a86077722ee4f42ff97f836b12420bb2a
PR22209, invalid memory read in find_abstract_instance_name
This patch adds bounds checking for DW_FORM_ref_addr die refs, and
calculates them relative to the first .debug_info section. See the
big comment for why calculating relative to the current .debug_info
section was wrong for relocatable object files.
PR 22209
* dwarf2.c (struct comp_unit): Delete sec_info_ptr field.
(find_abstract_instance_name): Calculate DW_FORM_ref_addr relative
to stash->info_ptr_memory, and check die_ref is within that memory.
Set info_ptr_end correctly when another CU is refd. Check die_ref
for DW_FORM_ref4 etc. is within CU.