Created attachment 9812 [details]
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 checkout from main repository at git://sourceware.org/git/binutils-gdb.git. Its commit is 53f7e8ea7fad1fcff1b58f4cbd74e192e0bcbc1d (Fri Feb 10 00:00:16 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_11
readelf -w bug_11


Valgrind says:
==59939== Invalid read of size 8
==59939==    at 0x408F15: target_specific_reloc_handling (readelf.c:11675)
==59939==    by 0x408F15: apply_relocations (readelf.c:12343)
==59939==    by 0x40B133: load_specific_debug_section (readelf.c:12905)
==59939==    by 0x42384B: display_debug_section (readelf.c:13009)
==59939==    by 0x42384B: process_section_contents (readelf.c:13091)
==59939==    by 0x42384B: process_object (readelf.c:16780)
==59939==    by 0x402111: process_file (readelf.c:17154)
==59939==    by 0x402111: main (readelf.c:17225)
==59939==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==59939== 
==59939== 
==59939== Process terminating with default action of signal 11 (SIGSEGV)
==59939==  Access not within mapped region at address 0x0
==59939==    at 0x408F15: target_specific_reloc_handling (readelf.c:11675)
==59939==    by 0x408F15: apply_relocations (readelf.c:12343)
==59939==    by 0x40B133: load_specific_debug_section (readelf.c:12905)
==59939==    by 0x42384B: display_debug_section (readelf.c:13009)
==59939==    by 0x42384B: process_section_contents (readelf.c:13091)
==59939==    by 0x42384B: process_object (readelf.c:16780)
==59939==    by 0x402111: process_file (readelf.c:17154)
==59939==    by 0x402111: main (readelf.c:17225)


ASAN says:
==44698==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x00000054b47b sp 0x7ffebb728f20 bp 0x7ffebb7293f0 T0)
    #0 0x54b47a in target_specific_reloc_handling /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:11674
    #1 0x52e6dc in apply_relocations /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:12343
    #2 0x4846b5 in load_specific_debug_section /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:12905
    #3 0x564b4c in display_debug_section /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:13009
    #4 0x4e194f in process_section_contents /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:13091
    #5 0x48d610 in process_object /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:16780
    #6 0x488365 in process_file /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:17154
    #7 0x4855c3 in main /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:17225
    #8 0x7ff9ef5a4f44 (/lib/x86_64-linux-gnu/libc.so.6+0x21f44)
    #9 0x47ddfc in _start (/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/readelf+0x47ddfc)