From 848eaf2220fb57cc5b9726a9dc298b79ab99b4df Mon Sep 17 00:00:00 2001
From: Ali Mohammad Pur <ali.mpfard@gmail.com>
Date: Thu, 24 Feb 2022 22:29:45 +0330
Subject: [PATCH] Kernel: Reject sigaction() with SA_SIGINFO

We can't handle this, so let sigaction() fail instead of PANIC()'ing
later when we try to dispatch a signal with SA_SIGINFO set.
---
 Kernel/Syscalls/sigaction.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Kernel/Syscalls/sigaction.cpp b/Kernel/Syscalls/sigaction.cpp
index 80e14c44a8..e9b5c4c99e 100644
--- a/Kernel/Syscalls/sigaction.cpp
+++ b/Kernel/Syscalls/sigaction.cpp
@@ -68,6 +68,8 @@ ErrorOr<FlatPtr> Process::sys$sigaction(int signum, Userspace<const sigaction*>
     }
     if (user_act) {
         auto act = TRY(copy_typed_from_user(user_act));
+        if (act.sa_flags & SA_SIGINFO)
+            return ENOTSUP;
         action.mask = act.sa_mask;
         action.flags = act.sa_flags;
         action.handler_or_sigaction = VirtualAddress { reinterpret_cast<void*>(act.sa_sigaction) };