From beb9d33d6da42be75faed2975cf16e4acbf62be4 Mon Sep 17 00:00:00 2001
From: Alexandros Naskos <alex_naskos@hotmail.com>
Date: Tue, 17 Nov 2020 14:05:01 +0200
Subject: [PATCH] Disallow absolute paths passed as system libraries

Added OBJECT_NAME_INVALID handling in faccessatW
---
 lib/std/os.zig | 1 +
 src/main.zig   | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/lib/std/os.zig b/lib/std/os.zig
index 3eb7f236c8..5c97d61690 100644
--- a/lib/std/os.zig
+++ b/lib/std/os.zig
@@ -3809,6 +3809,7 @@ pub fn faccessatW(dirfd: fd_t, sub_path_w: [*:0]const u16, mode: u32, flags: u32
         .SUCCESS => return,
         .OBJECT_NAME_NOT_FOUND => return error.FileNotFound,
         .OBJECT_PATH_NOT_FOUND => return error.FileNotFound,
+        .OBJECT_NAME_INVALID => return error.BadPathName,
         .INVALID_PARAMETER => unreachable,
         .ACCESS_DENIED => return error.PermissionDenied,
         .OBJECT_PATH_SYNTAX_BAD => unreachable,
diff --git a/src/main.zig b/src/main.zig
index 5e406152d3..ac1b852b7d 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -1401,6 +1401,9 @@ fn buildOutputType(
                 _ = system_libs.orderedRemove(i);
                 continue;
             }
+            if (std.fs.path.isAbsolute(lib_name)) {
+                fatal("cannot use absolute path as a system library: {}", .{lib_name});
+            }
             i += 1;
         }
     }