[Bug malloc/27870] New: MALLOC_CHECK_ causes realloc(valid_ptr, TOO_LARGE) to not set ENOMEM

[Bug malloc/27870] New: MALLOC_CHECK_ causes realloc(valid_ptr, TOO_LARGE) to not set ENOMEM

[P at draigBrady dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27870

            Bug ID: 27870
           Summary: MALLOC_CHECK_ causes realloc(valid_ptr, TOO_LARGE) to
                    not set ENOMEM
           Product: glibc
           Version: 2.33
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: malloc
          Assignee: unassigned at sourceware dot org
          Reporter: P at draigBrady dot com
  Target Milestone: ---

With MALLOC_CHECK_ env var set to valid values (1,2, or 3),
the realloc implementation doesn't set ENOMEM when it should.

Running the following shows that errno is incorrectly set to 0:


#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
int main ()
{
  void *p;
  void* p2 = malloc ((unsigned long) 1);
  errno = 0;
  p = realloc (p2, (unsigned long) PTRDIFF_MAX + 1);
  fprintf (stderr, "p=%p errno=%d\n", p, errno);
  return 0;
}


gcc realloc.c
MALLOC_CHECK_=1 ./a.out

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[Bug malloc/27870] MALLOC_CHECK_ causes realloc(valid_ptr, TOO_LARGE) to not set ENOMEM

[schwab@linux-m68k.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=27870

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|---                         |2.34

--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
Fixed in 2.34

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[Bug malloc/27870] MALLOC_CHECK_ causes realloc(valid_ptr, TOO_LARGE) to not set ENOMEM

[P at draigBrady dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27870

--- Comment #2 from Pádraig Brady <P at draigBrady dot com> ---
https://sourceware.org/git/?p=glibc.git;a=commit;h=c6b6b4f2

Thank you

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