https://sourceware.org/bugzilla/show_bug.cgi?id=26189
Bug ID: 26189
Summary: heap user after free in nm bfd_hash_lookup
Product: binutils
Version: 2.34
Status: UNCONFIRMED
Severity: critical
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: featherrain26 at gmail dot com
Target Milestone: ---
Created attachment 12674
--> https://sourceware.org/bugzilla/attachment.cgi?id=12674&action=edit
POC input
Hi, there.
There is a use after free in bfd_hash_lookup, triggered by nm-new -al
To reproduce,
run
nm-new -al input
Here is the trace reported by ASAN:
==141996==ERROR: AddressSanitizer: heap-use-after-free on address
0x61800000f8a0 at pc 0x7f01e43562c5 bp 0x7fff7acf0710 sp 0x7fff7acefeb8
READ of size 4 at 0x61800000f8a0 thread T0
#0 0x7f01e43562c4 (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x472c4)
#1 0x456083 in bfd_hash_lookup ../../bfd/hash.c:475
#2 0x471dd8 in bfd_get_section_by_name ../../bfd/section.c:884
#3 0x71e0de in _bfd_pei_swap_sym_in
/mnt/data/playground/binutils-2.34-a/build/bfd/peigen.c:170
#4 0x77cad1 in coff_get_normalized_symtab ../../bfd/coffgen.c:1849
#5 0x7041b2 in coff_slurp_symbol_table ../../bfd/coffcode.h:4465
#6 0x766da6 in coff_get_symtab_upper_bound ../../bfd/coffgen.c:426
#7 0x478b80 in _bfd_generic_read_minisymbols ../../bfd/syms.c:813
#8 0x40eec9 in display_rel_file ../../binutils/nm.c:1112
#9 0x4129ec in display_file ../../binutils/nm.c:1379
#10 0x4081a7 in main ../../binutils/nm.c:1860
#11 0x7f01e3d6182f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
#12 0x40a248 in _start
(/mnt/data/playground/binutils-2.34-a/build/binutils/nm-new+0x40a248)
0x61800000f8a0 is located 32 bytes inside of 893-byte region
[0x61800000f880,0x61800000fbfd)
freed by thread T0 here:
#0 0x7f01e43a732a in __interceptor_free
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x9832a)
#1 0x77a11c in _bfd_coff_free_symbols ../../bfd/coffgen.c:1789
#2 0x77a11c in coff_real_object_p ../../bfd/coffgen.c:307
previously allocated by thread T0 here:
#0 0x7f01e43a7662 in malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98662)
#1 0x45a15a in bfd_malloc ../../bfd/libbfd.c:275
SUMMARY: AddressSanitizer: heap-use-after-free ??:0 ??
Shadow bytes around the buggy address:
0x0c307fff9ec0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c307fff9ed0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c307fff9ee0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c307fff9ef0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 05
0x0c307fff9f00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c307fff9f10: fd fd fd fd[fd]fd fd fd fd fd fd fd fd fd fd fd
0x0c307fff9f20: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c307fff9f30: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c307fff9f40: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c307fff9f50: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c307fff9f60: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
==141996==ABORTING
--
You are receiving this mail because:
You are on the CC list for the bug.
