From 2332462e7821d2ebc579f8b4e8bd097449167a0c Mon Sep 17 00:00:00 2001
From: Sebastian Lackner
Date: Mon, 7 Jan 2019 00:21:17 +0100
Subject: fusefrontend: Filter O_CREAT in mangleOpenFlags.

---
 internal/fusefrontend/fs.go | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'internal/fusefrontend/fs.go')

diff --git a/internal/fusefrontend/fs.go b/internal/fusefrontend/fs.go
index a0e9d9f..e379465 100644
--- a/internal/fusefrontend/fs.go
+++ b/internal/fusefrontend/fs.go
@@ -124,6 +124,9 @@ func (fs *FS) mangleOpenFlags(flags uint32) (newFlags int) {
 	// accesses. Running xfstests generic/013 on ext4 used to trigger lots of
 	// EINVAL errors due to missing alignment. Just fall back to buffered IO.
 	newFlags = newFlags &^ syscallcompat.O_DIRECT
+	// Create and Open are two separate FUSE operations, so O_CREAT should not
+	// be part of the open flags.
+	newFlags = newFlags &^ syscall.O_CREAT
 	// We always want O_NOFOLLOW to be safe against symlink races
 	newFlags |= syscall.O_NOFOLLOW
 	return newFlags
-- 
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