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.
orospakr · Mar 4, 2022 · 848eaf2 · 848eaf2
1 parent cf63447
commit 848eaf2
Showing 1 changed file with 2 additions and 0 deletions.
diff --git 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) };