Commit e9bd3f0f authored Apr 27, 2011 by Oleg Nesterov

x86: signal: sys_rt_sigreturn() should use set_current_blocked()



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 set_current_blocked()->retarget_shared_pending().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Matt Fleming <matt.fleming@linux.intel.com>
Acked-by: Tejun Heo <tj@kernel.org>

parent e6a58580

arch/x86/kernel/signal.c

+1 −4

Original line number	Diff line number	Diff line
		@@ -601,10 +601,7 @@ long sys_rt_sigreturn(struct pt_regs *regs)
		goto badframe;

		sigdelsetmask(&set, ~_BLOCKABLE);
		spin_lock_irq(&current->sighand->siglock);
		current->blocked = set;
		recalc_sigpending();
		spin_unlock_irq(&current->sighand->siglock);
		set_current_blocked(&set);

		if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
		goto badframe;