From: Joel Rosdahl <joel@rosdahl.net>
Date: Sat, 10 Feb 2024 20:33:08 +0000 (+0100)
Subject: chore: Bail out on too large files on 32-bit systems
X-Git-Tag: v4.10~98
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e4f50ac7c160119ae363c934ef84adad69a68ecf;p=thirdparty%2Fccache.git

chore: Bail out on too large files on 32-bit systems
---

diff --git a/src/util/file.cpp b/src/util/file.cpp
index 5b776297..87600422 100644
--- a/src/util/file.cpp
+++ b/src/util/file.cpp
@@ -240,6 +240,12 @@ read_file(const fs::path& path, size_t size_hint)
     size_hint = de.size();
   }
 
+  if (size_hint > std::numeric_limits<size_t>::max() / 4) {
+    // Too large value on a 32-bit system won't work well, better bail.
+    return tl::unexpected(
+      FMT("too large file: {} ({} bytes)", path, size_hint));
+  }
+
   const int open_flags = [] {
     if constexpr (std::is_same<T, std::string>::value) {
       return O_RDONLY | O_TEXT;