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: nodejs#46463
tniessen · Feb 4, 2023 · f60ad96 · f60ad96
1 parent 6bbc2fb
commit f60ad96
Showing 1 changed file with 1 addition and 0 deletions.
diff --git 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);