[Bug binutils/21148] New: readelf - multiple invalid read

[thuanpv at comp dot nus.edu.sg]

https://sourceware.org/bugzilla/show_bug.cgi?id=21148

            Bug ID: 21148
           Summary: readelf - multiple invalid read
           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 9815
  --> https://sourceware.org/bugzilla/attachment.cgi?id=9815&action=edit
Bug triggering 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_14
readelf -a bug_14


Valgrind says:
==46771== Invalid read of size 1
==46771==    at 0x438E2A: byte_get_little_endian (elfcomm.c:151)
==46771==    by 0x41127E: process_version_sections (readelf.c:10029)
==46771==    by 0x422E63: process_object (readelf.c:16778)
==46771==    by 0x402111: process_file (readelf.c:17154)
==46771==    by 0x402111: main (readelf.c:17225)
==46771==  Address 0x52086b8 is 0 bytes after a block of size 248 alloc'd
==46771==    at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==46771==    by 0x40566E: get_data (readelf.c:393)
==46771==    by 0x411112: process_version_sections (readelf.c:9980)
==46771==    by 0x422E63: process_object (readelf.c:16778)
==46771==    by 0x402111: process_file (readelf.c:17154)
==46771==    by 0x402111: main (readelf.c:17225)
==46771== 
==46771== Invalid read of size 1
==46771==    at 0x438E10: byte_get_little_endian (elfcomm.c:149)
==46771==    by 0x411291: process_version_sections (readelf.c:10030)
==46771==    by 0x422E63: process_object (readelf.c:16778)
==46771==    by 0x402111: process_file (readelf.c:17154)
==46771==    by 0x402111: main (readelf.c:17225)
==46771==  Address 0x52086ba is 2 bytes after a block of size 248 alloc'd
==46771==    at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==46771==    by 0x40566E: get_data (readelf.c:393)
==46771==    by 0x411112: process_version_sections (readelf.c:9980)
==46771==    by 0x422E63: process_object (readelf.c:16778)
==46771==    by 0x402111: process_file (readelf.c:17154)
==46771==    by 0x402111: main (readelf.c:17225)
==46771== 
==46771== Invalid read of size 1
==46771==    at 0x438E14: byte_get_little_endian (elfcomm.c:150)
==46771==    by 0x411291: process_version_sections (readelf.c:10030)
==46771==    by 0x422E63: process_object (readelf.c:16778)
==46771==    by 0x402111: process_file (readelf.c:17154)
==46771==    by 0x402111: main (readelf.c:17225)
==46771==  Address 0x52086bb is 3 bytes after a block of size 248 alloc'd
==46771==    at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==46771==    by 0x40566E: get_data (readelf.c:393)
==46771==    by 0x411112: process_version_sections (readelf.c:9980)
==46771==    by 0x422E63: process_object (readelf.c:16778)
==46771==    by 0x402111: process_file (readelf.c:17154)
==46771==    by 0x402111: main (readelf.c:17225)
==46771== 
==46771== Invalid read of size 1
==46771==    at 0x438E24: byte_get_little_endian (elfcomm.c:148)
==46771==    by 0x411291: process_version_sections (readelf.c:10030)
==46771==    by 0x422E63: process_object (readelf.c:16778)
==46771==    by 0x402111: process_file (readelf.c:17154)
==46771==    by 0x402111: main (readelf.c:17225)
==46771==  Address 0x52086b9 is 1 bytes after a block of size 248 alloc'd
==46771==    at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==46771==    by 0x40566E: get_data (readelf.c:393)
==46771==    by 0x411112: process_version_sections (readelf.c:9980)
==46771==    by 0x422E63: process_object (readelf.c:16778)
==46771==    by 0x402111: process_file (readelf.c:17154)
==46771==    by 0x402111: main (readelf.c:17225)
==46771== 
==46771== Invalid read of size 1
==46771==    at 0x438E2A: byte_get_little_endian (elfcomm.c:151)
==46771==    by 0x411291: process_version_sections (readelf.c:10030)
==46771==    by 0x422E63: process_object (readelf.c:16778)
==46771==    by 0x402111: process_file (readelf.c:17154)
==46771==    by 0x402111: main (readelf.c:17225)
==46771==  Address 0x52086bc is 4 bytes after a block of size 248 alloc'd
==46771==    at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==46771==    by 0x40566E: get_data (readelf.c:393)
==46771==    by 0x411112: process_version_sections (readelf.c:9980)
==46771==    by 0x422E63: process_object (readelf.c:16778)
==46771==    by 0x402111: process_file (readelf.c:17154)
==46771==    by 0x402111: main (readelf.c:17225)


ASAN says:
==38490==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x611000009eb8 at pc 0x724f22 bp 0x7ffc974cbe90 sp 0x7ffc974cbe88
READ of size 1 at 0x611000009eb8 thread T0
    #0 0x724f21 in byte_get_little_endian
/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/elfcomm.c:148
    #1 0x4d4740 in process_version_sections
/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:10029
    #2 0x48d5d6 in process_object
/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:16778
    #3 0x488365 in process_file
/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:17154
    #4 0x4855c3 in main
/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:17225
    #5 0x7f47bbed2f44 (/lib/x86_64-linux-gnu/libc.so.6+0x21f44)
    #6 0x47ddfc in _start
(/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/readelf+0x47ddfc)

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