src: reset SIGSEGV handler before crashing

Without this, we would re-enter the signal handler immediately
after re-raising the signal, leading to an infinite loop.

PR-URL: https://github.com/nodejs/node/pull/27775
Refs: https://github.com/nodejs/node/pull/27246
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/node.cc b/src/node.cc
index 388a9ea448..f4a953a7c3 100644
--- a/src/node.cc
+++ b/src/node.cc
@@ -487,6 +487,12 @@ void TrapWebAssemblyOrContinue(int signo, siginfo_t* info, void* ucontext) {
     if (prev != nullptr) {
       prev(signo, info, ucontext);
     } else {
+      // Reset to the default signal handler, i.e. cause a hard crash.
+      struct sigaction sa;
+      memset(&sa, 0, sizeof(sa));
+      sa.sa_handler = SIG_DFL;
+      CHECK_EQ(sigaction(signo, &sa, nullptr), 0);
+
       ResetStdio();
       raise(signo);
     }