Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759492Ab3GRXPd (ORCPT ); Thu, 18 Jul 2013 19:15:33 -0400 Received: from mail7.hitachi.co.jp ([133.145.228.42]:35058 "EHLO mail7.hitachi.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759242Ab3GRXPc (ORCPT ); Thu, 18 Jul 2013 19:15:32 -0400 X-AuditID: 85900ec0-d56cbb900000151e-6a-51e8771189ff Subject: [PATCH 0/2] [BUGFIX] virtio/console: Fix two bugs of splice_write To: Amit Shah , linux-kernel@vger.kernel.org From: Yoshihiro YUNOMAE Cc: Hidehiro Kawai , Greg Kroah-Hartman , Masami Hiramatsu , Arnd Bergmann , yrl.pp-manager.tt@hitachi.com Date: Fri, 19 Jul 2013 08:19:27 +0900 Message-ID: <20130718231927.3664.50418.stgit@yunodevel> User-Agent: StGit/0.16 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1069 Lines: 35 Hi, This patch set fixes two bugs of splice_write in the virtio-console driver. [BUG1] Although pipe->nrbufs is empty, the driver tries to do splice_write. => This induces oops in sg_init_table(). [BUG2] No lock for competition of splice_write. => This induces oops in splice_from_pipe_feed() by bug of any user application. These reports are written in each patch. Thanks! --- Yoshihiro YUNOMAE (2): [BUGFIX] virtio/console: Quit from splice_write if pipe->nrbufs is 0 [BUGFIX] virtio/console: Add pipe_lock/unlock for splice_write drivers/char/virtio_console.c | 9 +++++++++ 1 file changed, 9 insertions(+) -- Yoshihiro YUNOMAE Software Platform Research Dept. Linux Technology Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: yoshihiro.yunomae.ez@hitachi.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/