From e5852a6100eef5e4172559dae5ea652d0c7f29d1 Mon Sep 17 00:00:00 2001
From: Johannes Altmanninger <aclopte@gmail.com>
Date: Wed, 5 Mar 2025 07:58:38 +0100
Subject: [PATCH] Fix crash on negative stat f_type (Rust-port regression)

Fixes #11219
---
 src/path.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/path.rs b/src/path.rs
index b9185680f..f4d75d3b8 100644
--- a/src/path.rs
+++ b/src/path.rs
@@ -707,7 +707,12 @@ fn path_remoteness(path: &wstr) -> DirRemoteness {
         // these are in varying headers. Simply hard code them.
         // Note that we treat FUSE filesystems as remote, which means we lock less on such filesystems.
         // NOTE: The cast is necessary for 32-bit systems because of the 4-byte CIFS_MAGIC_NUMBER
-        match usize::try_from(buf.f_type).unwrap() {
+        const _: () = assert!({
+            use std::mem;
+            let f_type = unsafe { mem::zeroed::<libc::statfs>() }.f_type;
+            mem::size_of_val(&f_type) <= mem::size_of::<usize>()
+        });
+        match buf.f_type as usize  {
             0x5346414F | // AFS_SUPER_MAGIC - Andrew File System
             0x6B414653 | // AFS_FS_MAGIC - Kernel AFS and AuriStorFS
             0x73757245 | // CODA_SUPER_MAGIC - Coda File System