https://sourceware.org/bugzilla/show_bug.cgi?id=21408
Bug ID: 21408
Summary: objdump segfault - null pointer dereferencing
Product: binutils
Version: 2.28
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: dungnguy at comp dot nus.edu.sg
Target Milestone: ---
Created attachment 10005
--> https://sourceware.org/bugzilla/attachment.cgi?id=10005&action=edit
Crashing input
Dear All,
This bug was found with AFLGo, a directed version of AFL/AFLFast. Thanks also
to Marcel Böhme and Van-Thuan Pham.
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
a6c21d4a553de184562fd8409a5bcd3f2cc2561a (Wed Apr 19 13:16:05 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 - bug3
objdump -WL bug3
ASAN says:
==148381==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x00000060fc56 bp 0x7fffd13821b0 sp 0x7fffd13805a0 T0)
#0 0x60fc55 in display_debug_lines_decoded
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/dwarf.c:3813:8
#1 0x56ef61 in display_debug_lines
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/dwarf.c:4195:21
#2 0x52f2c4 in dump_dwarf_section
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:2618:6
#3 0x9e4315 in bfd_map_over_sections
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/bfd/../../bfd/section.c:1395:5
#4 0x4e0652 in dump_dwarf
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:2684:3
#5 0x4d7539 in dump_bfd
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:3522:5
#6 0x4d5fe8 in display_object_bfd
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:3589:7
#7 0x4d5dcc in display_any_bfd
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:3678:5
#8 0x4d45f3 in display_file
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:3699:3
#9 0x4d26d3 in main
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:4001:6
#10 0x7f041d2a2f44 in __libc_start_main
/build/eglibc-oGUzwX/eglibc-2.19/csu/libc-start.c:287
#11 0x4cb13c in _start
(/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/objdump+0x4cb13c)
VALGRIND says:
==148383== Invalid read of size 8
==148383== at 0x416644: display_debug_lines_decoded (dwarf.c:3813)
==148383== by 0x4177A9: display_debug_lines (dwarf.c:4195)
==148383== by 0x407DE2: dump_dwarf_section (objdump.c:2618)
==148383== by 0x469C57: bfd_map_over_sections (section.c:1395)
==148383== by 0x407F43: dump_dwarf (objdump.c:2684)
==148383== by 0x409E26: dump_bfd (objdump.c:3522)
==148383== by 0x40A02E: display_object_bfd (objdump.c:3589)
==148383== by 0x40A270: display_any_bfd (objdump.c:3678)
==148383== by 0x40A2E4: display_file (objdump.c:3699)
==148383== by 0x40ABB7: main (objdump.c:4001)
==148383== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==148383==
==148383==
==148383== Process terminating with default action of signal 11 (SIGSEGV)
==148383== Access not within mapped region at address 0x0
==148383== at 0x416644: display_debug_lines_decoded (dwarf.c:3813)
==148383== by 0x4177A9: display_debug_lines (dwarf.c:4195)
==148383== by 0x407DE2: dump_dwarf_section (objdump.c:2618)
==148383== by 0x469C57: bfd_map_over_sections (section.c:1395)
==148383== by 0x407F43: dump_dwarf (objdump.c:2684)
==148383== by 0x409E26: dump_bfd (objdump.c:3522)
==148383== by 0x40A02E: display_object_bfd (objdump.c:3589)
==148383== by 0x40A270: display_any_bfd (objdump.c:3678)
==148383== by 0x40A2E4: display_file (objdump.c:3699)
==148383== by 0x40ABB7: main (objdump.c:4001)
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