From: Roland McGrath Date: Mon, 12 Nov 2007 23:41:55 +0000 (-0800) Subject: sigwait eats blocked default-ignore signals X-Git-Tag: v2.6.24-rc3~149 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=325d22df7b19e0116aff3391d3a03f73d0634ded;p=linux-2.6 sigwait eats blocked default-ignore signals While a signal is blocked, it must be posted even if its action is SIG_IGN or is SIG_DFL with the default action to ignore. This works right most of the time, but is broken when a sigwait (rt_sigtimedwait) is in progress. This changes the early-discard check to respect real_blocked. ~blocked is the set to check for "should wake up now", but ~(blocked|real_blocked) is the set for "blocked" semantics as defined by POSIX. This fixes bugzilla entry 9347, see http://bugzilla.kernel.org/show_bug.cgi?id=9347 Signed-off-by: Roland McGrath Signed-off-by: Linus Torvalds --- diff --git a/kernel/signal.c b/kernel/signal.c index 909a0cc6bc..afa4f781f9 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -55,7 +55,7 @@ static int sig_ignored(struct task_struct *t, int sig) * signal handler may change by the time it is * unblocked. */ - if (sigismember(&t->blocked, sig)) + if (sigismember(&t->blocked, sig) || sigismember(&t->real_blocked, sig)) return 0; /* Is it explicitly or implicitly ignored? */