Created attachment 10005 [details] 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)
*** Bug 21416 has been marked as a duplicate of this bug. ***
The master branch has been updated by Alan Modra <amodra@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=f082820db966c79e47a143da774700055a1fad41 commit f082820db966c79e47a143da774700055a1fad41 Author: Alan Modra <amodra@gmail.com> Date: Sun Apr 23 13:49:50 2017 +0930 PR 21408, segfault in display_debug_lines_decoded PR 21408 * dwarf.c (display_debug_lines_decoded): Don't segfault on NULL file_table.
Fixed