https://sourceware.org/bugzilla/show_bug.cgi?id=25444
Bug ID: 25444
Summary: objcopy : Floating point exception in
_bfd_elf_compute_section_file_positions
Product: binutils
Version: 2.35 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: fdgkhdkgh at gmail dot com
Target Milestone: ---
Created attachment 12226
--> https://sourceware.org/bugzilla/attachment.cgi?id=12226&action=edit
file that reproduces this problem
Corrupted file can trigger the Floating point exception.
binutils Version : HEAD
git clone git://sourceware.org/git/binutils-gdb.git
OS : ubuntu 18.04.3
kernel : gnu/linux 5.0.0-32-generic
processor : Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz
compiler : gcc 7.4.0
Steps to Reproduce :
download the sample from attachment
objcopy -I elf32-i386 -O elf32-i386 -B iamcu ./sample
gdb backtrace :
#0 0x00005555555cae6b in assign_file_positions_for_load_sections
(link_info=0x0, abfd=0x5555558ac510) at elf.c:5761
#1 assign_file_positions_except_relocs (link_info=0x0, abfd=0x5555558ac510) at
elf.c:6362
#2 _bfd_elf_compute_section_file_positions (abfd=<optimized out>,
link_info=link_info@entry=0x0) at elf.c:4353
#3 0x00005555555d0da7 in _bfd_elf_set_section_contents (abfd=0x5555558ac510,
section=0x5555558b55d0,
location=0x5555558c0cf0, offset=0x0, count=0x13) at elf.c:9144
#4 0x00005555555ac5f4 in bfd_set_section_contents (abfd=0x5555558ac510,
section=0x5555558b55d0,
location=0x5555558c0cf0, offset=<optimized out>, count=<optimized out>) at
section.c:1503
#5 0x000055555558a837 in copy_section (ibfd=<optimized out>,
isection=<optimized out>, obfdarg=0x5555558ac510)
at objcopy.c:4386
#6 0x00005555555ac48c in bfd_map_over_sections (abfd=0x5555558ab3c0,
operation=0x55555558a540 <copy_section>,
user_storage=0x5555558ac510) at section.c:1362
#7 0x000055555558bfcc in copy_object (ibfd=<optimized out>, obfd=<optimized
out>, input_arch=<optimized out>)
at objcopy.c:3232
#8 0x000055555558e0f9 in copy_file (input_filename=0x7fffffff2a35 "./sample",
output_filename=0x7fffffff2a3e "./gg",
input_target=<optimized out>, output_target=<optimized out>,
input_arch=0x55555589d820 <bfd_iamcu_arch>)
at objcopy.c:3798
#9 0x0000555555588200 in copy_main (argv=<optimized out>, argc=<optimized
out>) at objcopy.c:5848
#10 main (argc=<optimized out>, argc@entry=0x9, argv=<optimized out>,
argv@entry=0x7fffffff26f8) at objcopy.c:5974
#11 0x00007ffff7801b97 in __libc_start_main (main=0x5555555865b0 <main>,
argc=0x9, argv=0x7fffffff26f8,
init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>,
stack_end=0x7fffffff26e8)
at ../csu/libc-start.c:310
#12 0x00005555555890aa in _start ()
----------------
gdb peda report:
[----------------------------------registers-----------------------------------]
RAX: 0x174
RBX: 0x5555558c8180 --> 0x1
RCX: 0x0
RDX: 0x0
RSI: 0x0
RDI: 0x5555558c77d8 --> 0x5555558c7820 --> 0x5555558c7868 --> 0x5555558c7988
--> 0x5555558c79d0 --> 0x5555558c7a18 (--> ...)
RBP: 0x1
RSP: 0x7fffffff20d0 --> 0x0
RIP: 0x5555555cae6b (<_bfd_elf_compute_section_file_positions+7739>: div
rcx)
R8 : 0x1
R9 : 0x97c0000 ('')
R10: 0xa ('\n')
R11: 0x2
R12: 0x0
R13: 0x5555558c7788 --> 0x5555558c77d8 --> 0x5555558c7820 --> 0x5555558c7868
--> 0x5555558c7988 --> 0x5555558c79d0 (--> ...)
R14: 0x5555558c8380 --> 0x5555558c7788 --> 0x5555558c77d8 --> 0x5555558c7820
--> 0x5555558c7868 --> 0x5555558c7988 (--> ...)
R15: 0x5555558ac510 --> 0x5555558b6530 --> 0x7f0067672f2e
EFLAGS: 0x10246 (carry PARITY adjust ZERO sign trap INTERRUPT direction
overflow)
[-------------------------------------code-------------------------------------]
0x5555555cae61 <_bfd_elf_compute_section_file_positions+7729>: mov
rcx,rsi
0x5555555cae64 <_bfd_elf_compute_section_file_positions+7732>: cmovae
rcx,QWORD PTR [rbx+0x38]
0x5555555cae69 <_bfd_elf_compute_section_file_positions+7737>: xor
edx,edx
=> 0x5555555cae6b <_bfd_elf_compute_section_file_positions+7739>: div
rcx
0x5555555cae6e <_bfd_elf_compute_section_file_positions+7742>: mov
QWORD PTR [rbx+0x10],rdx
0x5555555cae72 <_bfd_elf_compute_section_file_positions+7746>:
jmp 0x5555555caa4a <_bfd_elf_compute_section_file_positions+6682>
0x5555555cae77 <_bfd_elf_compute_section_file_positions+7751>: nop
WORD PTR [rax+rax*1+0x0]
0x5555555cae80 <_bfd_elf_compute_section_file_positions+7760>: test
r12b,0x20
[------------------------------------stack-------------------------------------]
0000| 0x7fffffff20d0 --> 0x0
0008| 0x7fffffff20d8 --> 0x0
0016| 0x7fffffff20e0 --> 0x174
0024| 0x7fffffff20e8 --> 0x5555558ac510 --> 0x5555558b6530 --> 0x7f0067672f2e
0032| 0x7fffffff20f0 --> 0x555500000000 ('')
0040| 0x7fffffff20f8 --> 0x0
0048| 0x7fffffff2100 --> 0x5555558a32e0 --> 0xc00000008
0056| 0x7fffffff2108 --> 0x0
[------------------------------------------------------------------------------]
Legend: code, data, rodata, value
Stopped reason: SIGFPE
0x00005555555cae6b in assign_file_positions_for_load_sections (link_info=0x0,
abfd=0x5555558ac510) at elf.c:5761
5761 p->p_offset = off % (p->p_align > maxpagesize
--
You are receiving this mail because:
You are on the CC list for the bug.
