https://sourceware.org/bugzilla/show_bug.cgi?id=25673
Bug ID: 25673
Summary: strip-new: SIGSEGV in
_bfd_elf_write_secondary_reloc_section (elf.c:12676)
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 12376
--> https://sourceware.org/bugzilla/attachment.cgi?id=12376&action=edit
file that reproduces this problem
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
strip-new -I elf64-x86-64 --only-keep-debug ./sample
gdb backtrace :
gdb-peda$ bt
#0 _bfd_elf_write_secondary_reloc_section (abfd=0x5555558b9280,
sec=0x5555558c2930)
at elf.c:12676
#1 0x00005555555c03be in bfd_elf64_write_relocs (abfd=0x5555558b9280,
sec=0x5555558c2930,
data=<optimized out>) at elfcode.h:991
#2 0x00005555555ace3c in bfd_map_over_sections
(abfd=abfd@entry=0x5555558b9280,
operation=0x5555555c0180 <bfd_elf64_write_relocs>,
user_storage=user_storage@entry=0x7fffffff1fa4) at section.c:1377
#3 0x00005555555cd6e7 in _bfd_elf_write_object_contents (abfd=0x5555558b9280)
at elf.c:6639
#4 0x00005555555ab8fa in bfd_close (abfd=0x5555558b9280) at opncls.c:755
#5 0x000055555558e9f6 in copy_file (input_filename=0x7fffffff26bd "./sample",
output_filename=0x7fffffff26c9 "./stripoutput", input_target=<optimized
out>,
output_target=<optimized out>, input_arch=0x0) at objcopy.c:3837
#6 0x00005555555885ce in strip_main (argv=<optimized out>, argc=<optimized
out>)
at objcopy.c:4815
#7 main (argc=<optimized out>, argc@entry=0x7, argv=<optimized out>,
argv@entry=0x7fffffff2298) at objcopy.c:6013
#8 0x00007ffff7801b97 in __libc_start_main (main=0x555555586cb0 <main>,
argc=0x7,
argv=0x7fffffff2298, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fffffff2288) at
../csu/libc-start.c:310
#9 0x00005555555897aa in _start ()
---------------
gdb report
Program received signal SIGSEGV, Segmentation fault.
[----------------------------------registers-----------------------------------]
RAX: 0x60 ('`')
RBX: 0x5555558a4cc0 --> 0x2100000008
RCX: 0x0
RDX: 0x0
RSI: 0x7ffff7bcd8b0 --> 0x0
RDI: 0x7ffff7bcc680 --> 0xfbad2887
RBP: 0x0
RSP: 0x7fffffff1dc0 --> 0x5555558c2930 --> 0x5555558b19a5 (".got.plt")
RIP: 0x5555555d6778 (<_bfd_elf_write_secondary_reloc_section+360>: mov
rax,QWORD PTR [r15])
R8 : 0x7ffff7bcd8b0 --> 0x0
R9 : 0x7ffff7fd2740 (0x00007ffff7fd2740)
R10: 0xa ('\n')
R11: 0x246
R12: 0x0
R13: 0x5555558d1fb0 --> 0x4c ('L')
R14: 0x5555558b9280 --> 0x5555558b93b0 ("./stripoutput")
R15: 0x0
EFLAGS: 0x10246 (carry PARITY adjust ZERO sign trap INTERRUPT direction
overflow)
[-------------------------------------code-------------------------------------]
0x5555555d676a <_bfd_elf_write_secondary_reloc_section+346>: lea
rax,[rcx+rax*1+0x20]
0x5555555d676f <_bfd_elf_write_secondary_reloc_section+351>:
mov QWORD PTR [rsp+0x20],rax
0x5555555d6774 <_bfd_elf_write_secondary_reloc_section+356>: nop DWORD
PTR [rax+0x0]
=> 0x5555555d6778 <_bfd_elf_write_secondary_reloc_section+360>: mov
rax,QWORD PTR [r15]
0x5555555d677b <_bfd_elf_write_secondary_reloc_section+363>: mov
r12,QWORD PTR [rax]
0x5555555d677e <_bfd_elf_write_secondary_reloc_section+366>: cmp r12,rdx
0x5555555d6781 <_bfd_elf_write_secondary_reloc_section+369>:
mov QWORD PTR [rsp+0x58],r12
0x5555555d6786 <_bfd_elf_write_secondary_reloc_section+374>:
je 0x5555555d67a2 <_bfd_elf_write_secondary_reloc_section+402>
[------------------------------------stack-------------------------------------]
0000| 0x7fffffff1dc0 --> 0x5555558c2930 --> 0x5555558b19a5 (".got.plt")
0008| 0x7fffffff1dc8 --> 0x0
0016| 0x7fffffff1dd0 --> 0x5555556028f0 (<elf32_r_info>: shl rdi,0x8)
0024| 0x7fffffff1dd8 --> 0x7fffffff1e20 --> 0x5555558b9280 --> 0x5555558b93b0
("./stripoutput")
0032| 0x7fffffff1de0 --> 0x60 ('`')
0040| 0x7fffffff1de8 --> 0x5555558c5310 --> 0x400000009
0048| 0x7fffffff1df0 --> 0x7fffffff1e18 --> 0x5555558ae3c0 --> 0x5555558b0740
("./sample")
0056| 0x7fffffff1df8 --> 0x5555558b9280 --> 0x5555558b93b0 ("./stripoutput")
[------------------------------------------------------------------------------]
Legend: code, data, rodata, value
Stopped reason: SIGSEGV
_bfd_elf_write_secondary_reloc_section (abfd=0x5555558b9280,
sec=0x5555558c2930)
at elf.c:12676
12676 sym = *ptr->sym_ptr_ptr;
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