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um: don't restore current->blocked on error 

If we fail to setup the signal stack frame then we don't need to restore
current->blocked because it is not modified by setup_signal_stack_*.

Acked-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Richard Weinberger <richard@nod.at>
Tested-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matt Fleming 2012-03-23 15:01:49 -07:00 committed by Linus Torvalds
parent 6629326b89
commit f6adb9a6ae
1 changed files with 2 additions and 6 deletions
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8
arch/um/kernel/signal.c
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@ -65,13 +65,9 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr,
#endif
err = setup_signal_stack_si(sp, signr, ka, regs, info, oldset);
if (err) {
spin_lock_irq(&current->sighand->siglock);
current->blocked = *oldset;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
if (err)
force_sigsegv(signr, current);
} else {
else {
spin_lock_irq(&current->sighand->siglock);
sigorsets(&current->blocked, &current->blocked,
&ka->sa.sa_mask);