Messages in this thread | | | Date | Wed, 4 May 2016 08:32:33 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 1/4] signals/sigaltstack: If SS_AUTODISARM, bypass on_sig_stack |
| |
* Andy Lutomirski <luto@kernel.org> wrote:
> If a signal stack is set up with SS_AUTODISARM, then the kernel > inherently avoids incorrectly resetting the signal stack if signals > recurse: the signal stack will be reset on the first signal > delivery. This means that we don't need check the stack pointer > when delivering signals if SS_AUTODISARM is set. > > This will make segmented x86 programs more robust: currently there's > a hole that could be triggered if ESP/RSP appears to point to the > signal stack but actually doesn't due to a nonzero SS base. > > Signed-off-by: Stas Sergeev <stsp@list.ru>
Presuably that SOB from Stas is stray, as there's no matching From: line? I've removed it.
Thanks,
Ingo
| |