Re: [patch 2/3] MAP_NOZERO - implement sys_brk2()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 6/26/07, Rik van Riel <[email protected]> wrote:
Since programs can get back free()d memory after a malloc(),
with the old contents of the memory intact, surely your
MAP_NONZERO behavior could be the default for programs that
can get away with it?

Maybe we could use some magic ELF header, similar to the
way non-executable stack is handled?

No.  This is an implementation detail of the libc version.  The malloc
as compiled today is expecting brk-ed memory to be zeroed.  This
default can of course be changed (it's a simple define) but you cannot
make this the default behavior for brk.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux