From 1a808a4aad3c864119a5a0bd27b4224775bbb7ee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tobias=20Nie=C3=9Fen?= <tniessen@tnie.de>
Date: Mon, 6 Feb 2023 15:59:36 +0100
Subject: [PATCH] src: check return value of ftell()

If ftell() returns -1L, abort instead of passing static_cast<size_t>(-1)
to the vector allocator and fread().

Refs: https://github.com/nodejs/node/pull/46463
PR-URL: https://github.com/nodejs/node/pull/46495
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
---
 src/node_snapshotable.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/node_snapshotable.cc b/src/node_snapshotable.cc
index 598519c7ba03b1..7ad70447b55206 100644
--- a/src/node_snapshotable.cc
+++ b/src/node_snapshotable.cc
@@ -877,6 +877,7 @@ bool SnapshotData::FromBlob(SnapshotData* out, FILE* in) {
   int err = fseek(in, 0, SEEK_END);
   CHECK_EQ(err, 0);
   size_t size = ftell(in);
+  CHECK_NE(size, static_cast<size_t>(-1L));
   err = fseek(in, 0, SEEK_SET);
   CHECK_EQ(err, 0);