https://sourceware.org/bugzilla/show_bug.cgi?id=25637
Bug ID: 25637
Summary: objcopy : SIGSEGV in copy_object ( objcopy.c:3219 )
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 12350
--> https://sourceware.org/bugzilla/attachment.cgi?id=12350&action=edit
file that reproduces this problem
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 -O pei-i386 --change-leading-char ./sample
Try to mov a byte to .text section, and trigger SIGSEGV.
Probably the similar bug in
https://sourceware.org/bugzilla/show_bug.cgi?id=25629
gdb backtrace :
#0 copy_object (ibfd=0x5555558ac3c0, obfd=<optimized out>,
input_arch=<optimized out>) at objcopy.c:3219
#1 0x000055555558e159 in copy_file (input_filename=0x7fffffff2a40 "./sample",
output_filename=0x7fffffff2a49 "./objoutput", input_target=<optimized out>,
output_target=<optimized out>,
input_arch=0x0) at objcopy.c:3810
#2 0x0000555555588210 in copy_main (argv=<optimized out>, argc=<optimized
out>) at objcopy.c:5860
#3 main (argc=<optimized out>, argc@entry=0x6, argv=<optimized out>,
argv@entry=0x7fffffff2718) at objcopy.c:5986
#4 0x00007ffff7801b97 in __libc_start_main (main=0x5555555865c0 <main>,
argc=0x6, argv=0x7fffffff2718,
init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>,
stack_end=0x7fffffff2708)
at ../csu/libc-start.c:310
#5 0x00005555555890ba in _start ()
----------------
gdb peda report :
Program received signal SIGSEGV, Segmentation fault.
[----------------------------------registers-----------------------------------]
RAX: 0x5f ('_')
RBX: 0x5555558c1e40 --> 0x5555558ac3c0 --> 0x5555558ae740 ("./sample")
RCX: 0x5555558c7e90 --> 0x5555558c0ee0 --> 0x5555558ac3c0 --> 0x5555558ae740
("./sample")
RDX: 0x1
RSI: 0x1f
RDI: 0x5555558ac0c0 --> 0x555555589320 (<htab_hash_redefnode>: mov
rdi,QWORD PTR [rdi])
RBP: 0x0
RSP: 0x7fffffff2340 --> 0x5555558b68e8 --> 0x5555558c1e40 --> 0x5555558ac3c0
--> 0x5555558ae740 ("./sample")
RIP: 0x55555558c1b1 (<copy_object+5249>: mov BYTE PTR [r12],al)
R8 : 0x5555558abcc0 --> 0x0
R9 : 0x555555673dc0 --> 0x2492492500000007
R10: 0x6652751a
R11: 0x2
R12: 0x55555565cfb0 --> 0x64697374756f2800 ('')
R13: 0xf
R14: 0x0
R15: 0x5555558b74d0 --> 0x5555558b7600 ("./objoutput")
EFLAGS: 0x10246 (carry PARITY adjust ZERO sign trap INTERRUPT direction
overflow)
[-------------------------------------code-------------------------------------]
0x55555558c1a5 <copy_object+5237>: xor eax,eax
0x55555558c1a7 <copy_object+5239>: call 0x55555559f150
<bfd_nonfatal_message>
0x55555558c1ac <copy_object+5244>: jmp 0x55555558c122
<copy_object+5106>
=> 0x55555558c1b1 <copy_object+5249>: mov BYTE PTR [r12],al
0x55555558c1b5 <copy_object+5253>: mov rbp,r12
0x55555558c1b8 <copy_object+5256>: mov QWORD PTR [rbx+0x8],r12
0x55555558c1bc <copy_object+5260>: jmp 0x55555558bb37
<copy_object+3591>
0x55555558c1c1 <copy_object+5265>: mov r13,QWORD PTR [r14+0x90]
[------------------------------------stack-------------------------------------]
0000| 0x7fffffff2340 --> 0x5555558b68e8 --> 0x5555558c1e40 --> 0x5555558ac3c0
--> 0x5555558ae740 ("./sample")
0008| 0x7fffffff2348 --> 0x3b62f6a500004005
0016| 0x7fffffff2350 --> 0x29 (')')
0024| 0x7fffffff2358 --> 0x5555558a0360 --> 0x555555654c7a -->
0x432a002a5342412a ('*ABS*')
0032| 0x7fffffff2360 --> 0x5555558ac3c0 --> 0x5555558ae740 ("./sample")
0040| 0x7fffffff2368 --> 0x5555558b74d0 --> 0x5555558b7600 ("./objoutput")
0048| 0x7fffffff2370 --> 0x5555558b6a10 --> 0x0
0056| 0x7fffffff2378 --> 0x5555558c7e90 --> 0x5555558c0ee0 --> 0x5555558ac3c0
--> 0x5555558ae740 ("./sample")
[------------------------------------------------------------------------------]
Legend: code, data, rodata, value
Stopped reason: SIGSEGV
copy_object (ibfd=0x5555558ac3c0, obfd=<optimized out>, input_arch=<optimized
out>) at objcopy.c:3219
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