memory leak at ld parse_args

[liuyingying (F)]

Use sanitizer for test and result shows that there are memory leak at 
parse_args function.

Test case:


#include 

int main()
{
printf("Hello world!\n");
return 0;
}


binutils version 2.34

Checked on the source code, I did not see any free action on below shortopts, 
longopts, really_longopts variable.

[cid:image001.png@01D6B227.70106680]

[Bug ld/26836] New: potential memory leak in parse_args

[liuyingying19 at huawei dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26836

Bug ID: 26836
   Summary: potential memory leak in parse_args
   Product: binutils
   Version: 2.34
Status: UNCONFIRMED
  Severity: normal
  Priority: P2
 Component: ld
  Assignee: unassigned at sourceware dot org
  Reporter: liuyingying19 at huawei dot com
  Target Milestone: ---

Test case:

#include 
int main()
{
printf("Hello world!\n");
return 0;
}

==74578==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 5664 byte(s) in 1 object(s) allocated from:
  #0 0x7fedf6816860 in __interceptor_malloc
../../.././libsanitier/asasn/asan_malloc_linux.cc:62
  #1 0x560879e0b151 in parse_args (/usr/bin/riscv32-unknown-elf-ld+03d151)

binutils version 2.34


Checked on the source code, I did not see any free action on below shortopts,
longopts, really_longopts variable.

ld/lexsup.c
  shortopts = (char *) xmalloc (OPTION_COUNT * 3 + 2);
  longopts = (struct option *)
  xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
  really_longopts = (struct option *)
  malloc (sizeof (*really_longopts) * (OPTION_COUNT + 1));

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