Re: [PATCH 6/6] x86: signal: sys_rt_sigreturn() should usesigprocmask()

From: Matt Fleming
Date: Tue Apr 12 2011 - 08:18:05 EST

On Mon, 11 Apr 2011 19:22:29 +0200
Oleg Nesterov <oleg@xxxxxxxxxx> wrote:

> Normally sys_rt_sigreturn() restores the old current->blocked which was
> changed by handle_signal(), and unblocking is always fine.
> But the debugger or application itself can change frame->uc_sigmask and
> thus we need sigprocmask()->retarget_shared_pending().
> Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>

Reviewed-by: Matt Fleming <matt.fleming@xxxxxxxxxxxxxxx>

I'm just curious, have you actually seen this bug?
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