Re: Bug#262782: [Bug-tar] free(valloc()): invalid pointer

[GOTO Masanori]

At Mon, 02 Aug 2004 22:02:12 -0700,
Paul Eggert wrote:
> Justin Pryzby <address@hidden> writes:
> 
> > Please see Debian bug #248897 at [1] and its sibling at [2].  tar uses
> > valloc() to get aligned memory, and later free()s it.  However, the
> > pointer returned by glibc valloc() is not necessarily free()able.
> 
> Thanks for reporting this.  I see that the underlying problem is a bug
> in Debian glibc (Debian bug 262782, which you just filed).  It's
> clearly a bug, as the glibc manual says:
> 
>   With the GNU library, you can use `free' to free the blocks that
>   `memalign', `posix_memalign', and `valloc' return.
>   
> <http://www.gnu.org/software/libc/manual/html_node/Aligned-Memory-Blocks.html#Aligned%20Memory%20Blocks>
> 
> That being said, tar should work around the Debian bug, as similar
> problems apparently occur on a few other platforms.  I installed the
> following patch into the tar CVS main branch.

Thanks Paul.  Yes, it's debian specific problem - it should be fixed
in the next version.  BTW, I have not checked well, but it seems
_MALLOC_CHECK bug, not valloc() itself...

Regards,
-- gotom