Messages in this thread Patch in this message | | | From | Roland McGrath <> | Subject | [PATCH] sigwait eats blocked default-ignore signals | Date | Mon, 12 Nov 2007 15:41:55 -0800 (PST) |
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cf http://bugzilla.kernel.org/show_bug.cgi?id=9347
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.
Signed-off-by: Roland McGrath <roland@redhat.com> --- kernel/signal.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/kernel/signal.c b/kernel/signal.c index 0ac614a..9b22790 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? */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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