From 1dfd6b7b765c82c4c9cf6d41ec6d6ed5f6cb2a79 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher <jakobunt@gmail.com>
Date: Sat, 31 Jul 2021 10:53:32 +0200
Subject: [PATCH] fusefrontend: prepareAtSyscall: handle error when opening
 ourselves

Error handling was missing here, so we would later get confusing
EBADF errors due to dirfd being -1.
---
 internal/fusefrontend/node_prepare_syscall.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/internal/fusefrontend/node_prepare_syscall.go b/internal/fusefrontend/node_prepare_syscall.go
index 283096f..0894379 100644
--- a/internal/fusefrontend/node_prepare_syscall.go
+++ b/internal/fusefrontend/node_prepare_syscall.go
@@ -66,6 +66,9 @@ func (n *Node) prepareAtSyscall(child string) (dirfd int, cName string, errno sy
 	defer syscall.Close(parentDirfd)
 
 	dirfd, err := syscallcompat.Openat(parentDirfd, myCName, syscall.O_NOFOLLOW|syscall.O_DIRECTORY|syscallcompat.O_PATH, 0)
+	if err != nil {
+		return -1, "", fs.ToErrno(err)
+	}
 
 	// Cache store
 	if !rn.args.PlaintextNames {