https://sourceware.org/bugzilla/show_bug.cgi?id=21157
Bug ID: 21157
Summary: objdump segfault - of-by-one 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 9824
--> https://sourceware.org/bugzilla/attachment.cgi?id=9824&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 - objdump_bug_1
objdump -g objdump_bug_1
Valgrind says:
==105891== Conditional jump or move depends on uninitialised value(s)
==105891== at 0x4283E8: parse_stab_enum_type (stabs.c:1978)
==105891== by 0x4283E8: parse_stab_type (stabs.c:1554)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x42AE36: parse_stab_string (stabs.c:815)
==105891== by 0x42AE36: parse_stab (stabs.c:651)
==105891== by 0x4214EC: read_symbol_stabs_debugging_info (rddbg.c:321)
==105891== by 0x4214EC: read_debugging_info (rddbg.c:62)
==105891== by 0x408402: dump_bfd (objdump.c:3513)
==105891== by 0x4089AF: display_object_bfd (objdump.c:3564)
==105891== by 0x4089AF: display_any_bfd (objdump.c:3653)
==105891==
==105891== Invalid read of size 1
==105891== at 0x4283E4: parse_stab_enum_type (stabs.c:1978)
==105891== by 0x4283E4: parse_stab_type (stabs.c:1554)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x42AE36: parse_stab_string (stabs.c:815)
==105891== by 0x42AE36: parse_stab (stabs.c:651)
==105891== by 0x4214EC: read_symbol_stabs_debugging_info (rddbg.c:321)
==105891== by 0x4214EC: read_debugging_info (rddbg.c:62)
==105891== by 0x408402: dump_bfd (objdump.c:3513)
==105891== by 0x4089AF: display_object_bfd (objdump.c:3564)
==105891== by 0x4089AF: display_any_bfd (objdump.c:3653)
==105891== Address 0x5411f60 is 0 bytes after a block of size 256 alloc'd
==105891== at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==105891== by 0x449F9D: bfd_malloc (libbfd.c:184)
==105891== by 0x49CB82: aout_get_external_symbols (aoutx.h:1359)
==105891== by 0x4A03F8: aout_32_slurp_symbol_table (aoutx.h:1755)
==105891== by 0x4A1628: aout_32_get_symtab_upper_bound (aoutx.h:2520)
==105891== by 0x407DB2: slurp_symtab (objdump.c:611)
==105891== by 0x407DB2: dump_bfd (objdump.c:3476)
==105891== by 0x4089AF: display_object_bfd (objdump.c:3564)
==105891== by 0x4089AF: display_any_bfd (objdump.c:3653)
==105891== by 0x40AC63: display_file (objdump.c:3674)
==105891== by 0x404CBD: main (objdump.c:3969)
==105891==
==105891== Invalid read of size 8
==105891== at 0x4C2F79E: memcpy@@GLIBC_2.14 (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==105891== by 0x425034: memcpy (string3.h:51)
==105891== by 0x425034: savestring (stabs.c:217)
==105891== by 0x4283F7: parse_stab_enum_type (stabs.c:1981)
==105891== by 0x4283F7: parse_stab_type (stabs.c:1554)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x42AE36: parse_stab_string (stabs.c:815)
==105891== by 0x42AE36: parse_stab (stabs.c:651)
==105891== by 0x4214EC: read_symbol_stabs_debugging_info (rddbg.c:321)
==105891== by 0x4214EC: read_debugging_info (rddbg.c:62)
==105891== Address 0x5411f60 is 0 bytes after a block of size 256 alloc'd
==105891== at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==105891== by 0x449F9D: bfd_malloc (libbfd.c:184)
==105891== by 0x49CB82: aout_get_external_symbols (aoutx.h:1359)
==105891== by 0x4A03F8: aout_32_slurp_symbol_table (aoutx.h:1755)
==105891== by 0x4A1628: aout_32_get_symtab_upper_bound (aoutx.h:2520)
==105891== by 0x407DB2: slurp_symtab (objdump.c:611)
==105891== by 0x407DB2: dump_bfd (objdump.c:3476)
==105891== by 0x4089AF: display_object_bfd (objdump.c:3564)
==105891== by 0x4089AF: display_any_bfd (objdump.c:3653)
==105891== by 0x40AC63: display_file (objdump.c:3674)
==105891== by 0x404CBD: main (objdump.c:3969)
==105891==
==105891== Invalid read of size 8
==105891== at 0x4C2F790: memcpy@@GLIBC_2.14 (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==105891== by 0x425034: memcpy (string3.h:51)
==105891== by 0x425034: savestring (stabs.c:217)
==105891== by 0x4283F7: parse_stab_enum_type (stabs.c:1981)
==105891== by 0x4283F7: parse_stab_type (stabs.c:1554)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x427B12: parse_stab_type (stabs.c:1369)
==105891== by 0x42AE36: parse_stab_string (stabs.c:815)
==105891== by 0x42AE36: parse_stab (stabs.c:651)
==105891== by 0x4214EC: read_symbol_stabs_debugging_info (rddbg.c:321)
==105891== by 0x4214EC: read_debugging_info (rddbg.c:62)
==105891== Address 0x5411f68 is 8 bytes after a block of size 256 alloc'd
==105891== at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==105891== by 0x449F9D: bfd_malloc (libbfd.c:184)
==105891== by 0x49CB82: aout_get_external_symbols (aoutx.h:1359)
==105891== by 0x4A03F8: aout_32_slurp_symbol_table (aoutx.h:1755)
==105891== by 0x4A1628: aout_32_get_symtab_upper_bound (aoutx.h:2520)
==105891== by 0x407DB2: slurp_symtab (objdump.c:611)
==105891== by 0x407DB2: dump_bfd (objdump.c:3476)
==105891== by 0x4089AF: display_object_bfd (objdump.c:3564)
==105891== by 0x4089AF: display_any_bfd (objdump.c:3653)
==105891== by 0x40AC63: display_file (objdump.c:3674)
==105891== by 0x404CBD: main (objdump.c:3969)
ASAN says:
==122274==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x611000009c40 at pc 0x6ca71e bp 0x7ffd26801c10 sp 0x7ffd26801c08
READ of size 1 at 0x611000009c40 thread T0
#0 0x6ca71d in parse_stab_enum_type
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/stabs.c:1978
#1 0x6bc4e1 in parse_stab_type
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/stabs.c:1554
#2 0x6b9a33 in parse_stab_type
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/stabs.c:1370
#3 0x6b9a33 in parse_stab_type
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/stabs.c:1370
#4 0x6b9a33 in parse_stab_type
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/stabs.c:1370
#5 0x6b9a33 in parse_stab_type
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/stabs.c:1370
#6 0x6b9a33 in parse_stab_type
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/stabs.c:1370
#7 0x6b9a33 in parse_stab_type
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/stabs.c:1370
#8 0x6b9a33 in parse_stab_type
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/stabs.c:1370
#9 0x6adcfc in parse_stab_string
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/stabs.c:815
#10 0x6a6fa8 in parse_stab
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/stabs.c:651
#11 0x621eb4 in read_symbol_stabs_debugging_info
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/rddbg.c:321
#12 0x61aecd in read_debugging_info
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/rddbg.c:62
#13 0x498f7b in dump_bfd
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/objdump.c:3513
#14 0x4978fb in display_object_bfd
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/objdump.c:3564
#15 0x497698 in display_any_bfd
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/objdump.c:3653
#16 0x495ebe in display_file
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/objdump.c:3674
#17 0x493edd in main
/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/../../binutils/objdump.c:3969
#18 0x7fa29e80ef44 (/lib/x86_64-linux-gnu/libc.so.6+0x21f44)
#19 0x48c95c in _start
(/home/ubuntu/thesis/subjects/binutils-gdb-nick/build-asan/binutils/objdump+0x48c95c)
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