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* [Bug libdw/28677] New: Bad dynamic entry conversion in dwfl_link_map_report
@ 2021-12-09 20:14 mark at klomp dot org
  2021-12-09 20:28 ` [Bug libdw/28677] " mark at klomp dot org
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: mark at klomp dot org @ 2021-12-09 20:14 UTC (permalink / raw)
  To: elfutils-devel

https://sourceware.org/bugzilla/show_bug.cgi?id=28677

            Bug ID: 28677
           Summary: Bad dynamic entry conversion in dwfl_link_map_report
           Product: elfutils
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libdw
          Assignee: unassigned at sourceware dot org
          Reporter: mark at klomp dot org
                CC: elfutils-devel at sourceware dot org
  Target Milestone: ---

Created attachment 13841
  --> https://sourceware.org/bugzilla/attachment.cgi?id=13841&action=edit
Corrupt core file

Reproducer from Bug 28666

$ valgrind -q eu-stack --core ./poc2 
==500881== Invalid read of size 8
==500881==    at 0x4851268: __GI_memmove (vg_replace_strmem.c:1271)
==500881==    by 0x48994CB: elf32_xlatetom (in
/usr/lib/aarch64-linux-gnu/libelf-0.183.so)
==500881==    by 0x49232D3: ??? (in /usr/lib/aarch64-linux-gnu/libdw-0.183.so)
==500881==    by 0x4924977: dwfl_core_file_report (in
/usr/lib/aarch64-linux-gnu/libdw-0.183.so)
==500881==    by 0x10AAB7: ??? (in /usr/bin/eu-stack)
==500881==    by 0x4C2ABAF: group_parse (argp-parse.c:257)
==500881==    by 0x4C2ABAF: parser_finalize (argp-parse.c:604)
==500881==    by 0x4C2ABAF: argp_parse (argp-parse.c:922)
==500881==    by 0x10A273: ??? (in /usr/bin/eu-stack)
==500881==    by 0x4B6C217: (below main) (libc-start.c:308)
==500881==  Address 0x4034000 is 0 bytes after the brk data segment limit
0x4034000
==500881== 
==500881== Invalid read of size 8
==500881==    at 0x4851278: __GI_memmove (vg_replace_strmem.c:1271)
==500881==    by 0x48994CB: elf32_xlatetom (in
/usr/lib/aarch64-linux-gnu/libelf-0.183.so)
==500881==    by 0x49232D3: ??? (in /usr/lib/aarch64-linux-gnu/libdw-0.183.so)
==500881==    by 0x4924977: dwfl_core_file_report (in
/usr/lib/aarch64-linux-gnu/libdw-0.183.so)
==500881==    by 0x10AAB7: ??? (in /usr/bin/eu-stack)
==500881==    by 0x4C2ABAF: group_parse (argp-parse.c:257)
==500881==    by 0x4C2ABAF: parser_finalize (argp-parse.c:604)
==500881==    by 0x4C2ABAF: argp_parse (argp-parse.c:922)
==500881==    by 0x10A273: ??? (in /usr/bin/eu-stack)
==500881==    by 0x4B6C217: (below main) (libc-start.c:308)
==500881==  Address 0x4034008 is 8 bytes after the brk data segment limit
0x4034000
==500881== 
==500881== Invalid read of size 8
==500881==    at 0x4851280: __GI_memmove (vg_replace_strmem.c:1271)
==500881==    by 0x48994CB: elf32_xlatetom (in
/usr/lib/aarch64-linux-gnu/libelf-0.183.so)
==500881==    by 0x49232D3: ??? (in /usr/lib/aarch64-linux-gnu/libdw-0.183.so)
==500881==    by 0x4924977: dwfl_core_file_report (in
/usr/lib/aarch64-linux-gnu/libdw-0.183.so)
==500881==    by 0x10AAB7: ??? (in /usr/bin/eu-stack)
==500881==    by 0x4C2ABAF: group_parse (argp-parse.c:257)
==500881==    by 0x4C2ABAF: parser_finalize (argp-parse.c:604)
==500881==    by 0x4C2ABAF: argp_parse (argp-parse.c:922)
==500881==    by 0x10A273: ??? (in /usr/bin/eu-stack)
==500881==    by 0x4B6C217: (below main) (libc-start.c:308)
==500881==  Address 0x4034010 is 16 bytes after the brk data segment limit
0x4034000
==500881== 
==500881== Invalid read of size 8
==500881==    at 0x4851288: __GI_memmove (vg_replace_strmem.c:1271)
==500881==    by 0x48994CB: elf32_xlatetom (in
/usr/lib/aarch64-linux-gnu/libelf-0.183.so)
==500881==    by 0x49232D3: ??? (in /usr/lib/aarch64-linux-gnu/libdw-0.183.so)
==500881==    by 0x4924977: dwfl_core_file_report (in
/usr/lib/aarch64-linux-gnu/libdw-0.183.so)
==500881==    by 0x10AAB7: ??? (in /usr/bin/eu-stack)
==500881==    by 0x4C2ABAF: group_parse (argp-parse.c:257)
==500881==    by 0x4C2ABAF: parser_finalize (argp-parse.c:604)
==500881==    by 0x4C2ABAF: argp_parse (argp-parse.c:922)
==500881==    by 0x10A273: ??? (in /usr/bin/eu-stack)
==500881==    by 0x4B6C217: (below main) (libc-start.c:308)
==500881==  Address 0x4034018 is 24 bytes after the brk data segment limit
0x4034000

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-- links below jump to the message on this page --
2021-12-09 20:14 [Bug libdw/28677] New: Bad dynamic entry conversion in dwfl_link_map_report mark at klomp dot org
2021-12-09 20:28 ` [Bug libdw/28677] " mark at klomp dot org
2021-12-09 21:27 ` evvers at ya dot ru
2021-12-10 10:14 ` mark at klomp dot org

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