From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jakob Unterwurzacher , Marios Titas , Miklos Szeredi Subject: [PATCH 4.4 07/20] fuse: fix READDIRPLUS skipping an entry Date: Tue, 31 Oct 2017 10:55:23 +0100 Message-Id: <20171031095510.579886815@linuxfoundation.org> In-Reply-To: <20171031095510.079198256@linuxfoundation.org> References: <20171031095510.079198256@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Miklos Szeredi commit c6cdd51404b7ac12dd95173ddfc548c59ecf037f upstream. 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 Tested-by: Marios Titas Signed-off-by: Miklos Szeredi Fixes: 0b05b18381ee ("fuse: implement NFS-like readdirplus support") Signed-off-by: Greg Kroah-Hartman --- fs/fuse/dir.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -1295,7 +1295,8 @@ static int parse_dirplusfile(char *buf, */ over = !dir_emit(ctx, dirent->name, dirent->namelen, dirent->ino, dirent->type); - ctx->pos = dirent->off; + if (!over) + ctx->pos = dirent->off; } buf += reclen;