From 13d98999b76aaac16d77e7b0e80fdd2922f48fd7 Mon Sep 17 00:00:00 2001
From: Idan Horowitz <idan.horowitz@gmail.com>
Date: Sun, 12 Dec 2021 00:08:57 +0200
Subject: [PATCH] Kernel: Flip incorrect bitwise set/clear of signal mask

---
 Kernel/Thread.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Kernel/Thread.cpp b/Kernel/Thread.cpp
index c137b6d021..d0103ffb87 100644
--- a/Kernel/Thread.cpp
+++ b/Kernel/Thread.cpp
@@ -674,9 +674,9 @@ u32 Thread::signal_mask_block(sigset_t signal_set, bool block)
     SpinlockLocker lock(g_scheduler_lock);
     auto previous_signal_mask = m_signal_mask;
     if (block)
-        m_signal_mask &= ~signal_set;
-    else
         m_signal_mask |= signal_set;
+    else
+        m_signal_mask &= ~signal_set;
     m_have_any_unmasked_pending_signals.store((pending_signals_for_state() & ~m_signal_mask) != 0, AK::memory_order_release);
     return previous_signal_mask;
 }