On Mon, 2011-04-11 at 12:42 -0400, Michael Santos wrote:
> ---
> src/lxc/namespace.c | 7 ++++++-
> 1 files changed, 6 insertions(+), 1 deletions(-)
>
> diff --git a/src/lxc/namespace.c b/src/lxc/namespace.c
> index 8263fe7..5928eaa 100644
> --- a/src/lxc/namespace.c
> +++ b/src/lxc/namespace.c
> @@ -67,9 +67,14 @@ pid_t lxc_clone(int (*fn)(void *), void *arg, int flags)
> };
>
> long stack_size = sysconf(_SC_PAGESIZE);
> - void *stack = alloca(stack_size) + stack_size;
> + void *stack = alloca(stack_size);
> pid_t ret;
>
> + if (stack == NULL)
> + ERROR("failed to allocate memory");
> +
> + stack += stack_size;
> +
Please see the man page, in particular "Notes on the GNU Version" and
"BUGS", for why this patch doesn't really make sense.
http://www.kernel.org/doc/man-pages/online/pages/man3/alloca.3.html
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