On Tue, 2009-11-17 at 18:55 -0600, Nathan Lynch wrote:
> +int eclone(int (*fn)(void *), void *fn_arg, int clone_flags_low,
> + struct clone_args *clone_args, pid_t *pids)
> +{
> + struct clone_args my_args;
> + unsigned long child_sp;
> + int newpid;
> +
> + if (clone_args->child_stack)
> + child_sp = clone_args->child_stack +
> + clone_args->child_stack_size - 1;
Should be
child_sp = (clone_args->child_stack +
clone_args->child_stack_size - 1) & ~0xf;
Otherwise the child starts with an unaligned sp, causing accesses
outside of the stack region.
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