https://sourceware.org/bugzilla/show_bug.cgi?id=22191
Bug ID: 22191
Summary: memory leak in dwarf2.c in gnu binutils 2.29
Product: binutils
Version: 2.29
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: luanjunchao at 163 dot com
Target Milestone: ---
Created attachment 10463
--> https://sourceware.org/bugzilla/attachment.cgi?id=10463&action=edit
memory leak poc
The output of running "objdump --x -SD -Wl -R leak.elf" is as follows:
....
==78968==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 40 byte(s) in 1 object(s) allocated from:
#0 0x7f484f64f602 in malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
#1 0x4cfdfb in bfd_malloc /work/binutils-gdb-asan/bfd/libbfd.c:193
#2 0x5e6dd7 in add_line_info dwarf2.c:1528
#3 0x5eaf10 in decode_line_info dwarf2.c:2383
#4 0x5f05b8 in comp_unit_find_nearest_line dwarf2.c:3562
#5 0x5f5351 in _bfd_dwarf2_find_nearest_line dwarf2.c:4622
#6 0x565d9a in _bfd_elf_find_nearest_line
/work/binutils-gdb-asan/bfd/elf.c:8653
#7 0x409469 in show_line objdump.c:1486
#8 0x40aaf6 in disassemble_bytes objdump.c:1791
#9 0x40e0c3 in disassemble_section objdump.c:2313
#10 0x4d8871 in bfd_map_over_sections
/work/binutils-gdb-asan/bfd/section.c:1395
#11 0x40eb05 in disassemble_data objdump.c:2449
#12 0x4141c9 in dump_bfd objdump.c:3546
#13 0x414498 in display_object_bfd objdump.c:3603
#14 0x414894 in display_any_bfd objdump.c:3692
#15 0x414909 in display_file objdump.c:3713
#16 0x415918 in main objdump.c:4015
#17 0x7f484f00982f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
Indirect leak of 240 byte(s) in 6 object(s) allocated from:
#0 0x7f484f64f602 in malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
#1 0x4cfdfb in bfd_malloc /work/binutils-gdb-asan/bfd/libbfd.c:193
#2 0x5e6dd7 in add_line_info dwarf2.c:1528
#3 0x5eaf10 in decode_line_info dwarf2.c:2383
#4 0x5f05b8 in comp_unit_find_nearest_line dwarf2.c:3562
#5 0x5f5351 in _bfd_dwarf2_find_nearest_line dwarf2.c:4622
#6 0x565d9a in _bfd_elf_find_nearest_line
/work/binutils-gdb-asan/bfd/elf.c:8653
#7 0x409469 in show_line objdump.c:1486
#8 0x40aaf6 in disassemble_bytes objdump.c:1791
#9 0x40e0c3 in disassemble_section objdump.c:2313
#10 0x4d8871 in bfd_map_over_sections
/work/binutils-gdb-asan/bfd/section.c:1395
#11 0x40eb05 in disassemble_data objdump.c:2449
#12 0x4141c9 in dump_bfd objdump.c:3546
#13 0x414498 in display_object_bfd objdump.c:3603
#14 0x414894 in display_any_bfd objdump.c:3692
#15 0x414909 in display_file objdump.c:3713
#16 0x415918 in main objdump.c:4015
#17 0x7f484f00982f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
Indirect leak of 40 byte(s) in 1 object(s) allocated from:
#0 0x7f484f64f602 in malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
#1 0x4cfdfb in bfd_malloc /work/binutils-gdb-asan/bfd/libbfd.c:193
#2 0x5e6dd7 in add_line_info dwarf2.c:1528
#3 0x5ea651 in decode_line_info dwarf2.c:2296
#4 0x5f05b8 in comp_unit_find_nearest_line dwarf2.c:3562
#5 0x5f5351 in _bfd_dwarf2_find_nearest_line dwarf2.c:4622
#6 0x565d9a in _bfd_elf_find_nearest_line
/work/binutils-gdb-asan/bfd/elf.c:8653
#7 0x409469 in show_line objdump.c:1486
#8 0x40aaf6 in disassemble_bytes objdump.c:1791
#9 0x40e0c3 in disassemble_section objdump.c:2313
#10 0x4d8871 in bfd_map_over_sections
/work/binutils-gdb-asan/bfd/section.c:1395
#11 0x40eb05 in disassemble_data objdump.c:2449
#12 0x4141c9 in dump_bfd objdump.c:3546
#13 0x414498 in display_object_bfd objdump.c:3603
#14 0x414894 in display_any_bfd objdump.c:3692
#15 0x414909 in display_file objdump.c:3713
#16 0x415918 in main objdump.c:4015
#17 0x7f484f00982f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
SUMMARY: AddressSanitizer: 320 byte(s) leaked in 8 allocation(s).
It seems that some memory allocted by bfd_malloc is not freed during
disassemble process.
The poc file is attached
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