| Summary: | memory leak in dwarf2.c in gnu binutils 2.29 | ||
|---|---|---|---|
| Product: | binutils | Reporter: | skysider <luanjunchao> |
| Component: | binutils | Assignee: | Alan Modra <amodra> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | ||
| Priority: | P2 | ||
| Version: | 2.29 | ||
| Target Milestone: | 2.30 | ||
| Host: | Target: | ||
| Build: | Last reconfirmed: | 2017-09-24 00:00:00 | |
| Attachments: | memory leak poc | ||
The master branch has been updated by Alan Modra <amodra@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=a26a013f22a19e2c16729e64f40ef8a7dfcc086e commit a26a013f22a19e2c16729e64f40ef8a7dfcc086e Author: Alan Modra <amodra@gmail.com> Date: Sun Sep 24 17:10:14 2017 +0930 PR22191, memory leak in dwarf2.c table->sequences is a linked list before it is replaced by a bfd_alloc array in sort_line_sequences. PR 22191 * dwarf2.c (decode_line_info): Properly free line sequences on error. Fixed |
Created attachment 10463 [details] 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