On 13 Sep 2002, Paul Larson wrote:
>
> The nightly LTP test against the 2.5 kernel bk tree last night turned up
> some test failures we don't normally see.  These failures did not show
> up in the run from the previous night.

[...]
> I found what was breaking this, looks like it was this change from your
> shared thread signals patch:
> -	if (sig < 1 || sig > _NSIG ||
> -	    (act && (sig == SIGKILL || sig == SIGSTOP)))
> +	if (sig < 1 || sig > _NSIG || (act && sig_kernel_only(sig)))

This fixes this bug and a number of others in the same class - the
signal behavior bitmasks should never be consulted before making sure
that the signal is in the word range.