[Bug binutils/21156] New: readefl segfault - invalid read of size 4

[thuanpv at comp dot nus.edu.sg]

https://sourceware.org/bugzilla/show_bug.cgi?id=21156

            Bug ID: 21156
           Summary: readefl segfault - invalid read of size 4
           Product: binutils
           Version: 2.29 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: thuanpv at comp dot nus.edu.sg
  Target Milestone: ---

Created attachment 9823
  --> https://sourceware.org/bugzilla/attachment.cgi?id=9823&action=edit
Crashing input

Dear all,

This bug was found with AFLGo, a directed version of AFL/AFLFast. Thanks also
to Marcel Böhme. 

This bug was found on Ubuntu 14.04 64-bit & binutils was checked out from main
repository at git://sourceware.org/git/binutils-gdb.git. Its commit is
61697d017e114d7667fbb340fb73f8184d48ee5a (Tue Feb 14 00:00:30 2017) 

binutils was built with ASAN using gcc-6.2 and clang-3.4. The configure command
was:

CC=clang CFLAGS="-DFORTIFY_SOURCE=2 -fstack-protector-all
-fsanitize=undefined,address -fno-omit-frame-pointer -g -Wno-error"
../configure --disable-shared --disable-gdb --disable-libdecnumber
--disable-readline --disable-sim

To reproduce:
Download the attached file - bug_2
readelf -w bug_2

Valgrind says:
==1379== Invalid read of size 4
==1379==    at 0x4035F3: find_section_in_set (readelf.c:679)
==1379==    by 0x422724: load_debug_section (readelf.c:13043)
==1379==    by 0x435D25: load_debug_info (dwarf.c:2720)
==1379==    by 0x437D1F: display_debug_aranges (dwarf.c:4933)
==1379==    by 0x423A0A: display_debug_section (readelf.c:13132)
==1379==    by 0x423A0A: process_section_contents (readelf.c:13207)
==1379==    by 0x423A0A: process_object (readelf.c:16899)
==1379==    by 0x402111: process_file (readelf.c:17273)
==1379==    by 0x402111: main (readelf.c:17344)
==1379==  Address 0x5205e00 is 0 bytes inside a block of size 60 free'd
==1379==    at 0x4C2BDEC: free (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1379==    by 0x4E6B587: _nl_make_l10nflist (l10nflist.c:256)
==1379==    by 0x4E68FD9: _nl_find_domain (finddomain.c:86)
==1379==    by 0x4E6881D: __dcigettext (dcigettext.c:640)
==1379==    by 0x42872A: get_FORM_name (dwarf.c:864)
==1379==    by 0x428D78: display_debug_abbrev (dwarf.c:4385)
==1379==    by 0x423A0A: display_debug_section (readelf.c:13132)
==1379==    by 0x423A0A: process_section_contents (readelf.c:13207)
==1379==    by 0x423A0A: process_object (readelf.c:16899)
==1379==    by 0x402111: process_file (readelf.c:17273)
==1379==    by 0x402111: main (readelf.c:17344)
==1379== 
==1379== 
==1379== Process terminating with default action of signal 11 (SIGSEGV)
==1379==  Access not within mapped region at address 0x4CE5202E80
==1379==    at 0x4035F3: find_section_in_set (readelf.c:679)
==1379==    by 0x422724: load_debug_section (readelf.c:13043)
==1379==    by 0x435D25: load_debug_info (dwarf.c:2720)
==1379==    by 0x437D1F: display_debug_aranges (dwarf.c:4933)
==1379==    by 0x423A0A: display_debug_section (readelf.c:13132)
==1379==    by 0x423A0A: process_section_contents (readelf.c:13207)
==1379==    by 0x423A0A: process_object (readelf.c:16899)
==1379==    by 0x402111: process_file (readelf.c:17273)
==1379==    by 0x402111: main (readelf.c:17344)

ASAN says:
==112697==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x61c000012800 at pc 0x47fd80 bp 0x7ffd87842e70 sp 0x7ffd87842e68
READ of size 4 at 0x61c000012800 thread T0
    #0 0x47fd7f in find_section_in_set
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:679
    #1 0x47edc0 in load_debug_section
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:13043
    #2 0x6ad616 in load_debug_info
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/dwarf.c:2720
    #3 0x647cb4 in display_debug_aranges
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/dwarf.c:4933
    #4 0x5667ca in display_debug_section
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:13132
    #5 0x4e1a7f in process_section_contents
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:13207
    #6 0x48d720 in process_object
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:16899
    #7 0x488475 in process_file
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:17273
    #8 0x4856d3 in main
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/readelf.c:17344
    #9 0x7f1697af2f44 (/lib/x86_64-linux-gnu/libc.so.6+0x21f44)
    #10 0x47ddfc in _start
(/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/readelf+0x47ddfc)

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