From 1a851616cbb89c4c54e9a04ba97caa257408c9db Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@redhat.com>
Date: Wed, 25 Oct 2017 16:34:27 +0200
Subject: [PATCH 01/11] fuse: fix READDIRPLUS skipping an entry

Git-commit: c6cdd51404b7ac12dd95173ddfc548c59ecf037f
Patch-mainline: v4.14-rc7
References: bsc#1088690

Marios Titas running a Haskell program noticed a problem with fuse's
readdirplus: when it is interrupted by a signal, it skips one directory
entry.

The reason is that fuse erronously updates ctx->pos after a failed
dir_emit().

The issue originates from the patch adding readdirplus support.

Reported-by: Jakob Unterwurzacher <jakobunt@gmail.com>
Tested-by: Marios Titas <redneb@gmx.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 0b05b18381ee ("fuse: implement NFS-like readdirplus support")
Cc: <stable@vger.kernel.org> # v3.9
Acked-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
---
 fs/fuse/dir.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 00800c07ba1c..4fbcb8721b2f 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1312,7 +1312,8 @@ static int parse_dirplusfile(char *buf, size_t nbytes, struct file *file,
 			*/
 			over = !dir_emit(ctx, dirent->name, dirent->namelen,
 				       dirent->ino, dirent->type);
-			ctx->pos = dirent->off;
+			if (!over)
+				ctx->pos = dirent->off;
 		}
 
 		buf += reclen;
-- 
2.16.2