From f15bb68b63e5f6ac5fba16bfb46ce122dd5d9cc9 Mon Sep 17 00:00:00 2001
From: Markus Armbruster <armbru@pond.sub.org>
Date: Sun, 27 Dec 2020 08:07:24 +0100
Subject: [PATCH] lwp: Fix unsafe update of LwpSigCaught

lwpCatchAwaitedSig() is not reentrant.  lwpInitSigWait() attempts to
protect it by setting an appropriate signal mask, but screws up.  This
could conceivably lose signals.  Messed up when it got added in commit
7183516d9, v4.3.6.  Fix it.

Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
---
 src/lib/lwp/sig.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/lib/lwp/sig.c b/src/lib/lwp/sig.c
index eb5361314..cdf29709b 100644
--- a/src/lib/lwp/sig.c
+++ b/src/lib/lwp/sig.c
@@ -67,7 +67,6 @@ lwpInitSigWait(sigset_t *set)
 
     act.sa_flags = 0;
     act.sa_mask = *set;
-    sigemptyset(&act.sa_mask);
     act.sa_handler = lwpCatchAwaitedSig;
     for (i = 0; i < NSIG; i++) {
 	if (sigismember(set, i))
-- 
2.43.0