From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yoshihiro YUNOMAE Subject: [PATCH V2 0/2] [BUGFIX] virtio/console: Fix two bugs of splice_write Date: Fri, 19 Jul 2013 18:19:51 +0900 Message-ID: <20130719091951.9698.95194.stgit@yunodevel> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: Amit Shah , linux-kernel@vger.kernel.org Cc: Arnd Bergmann , Greg Kroah-Hartman , stable@vger.kernel.org, virtualization@lists.linux-foundation.org, Masami Hiramatsu , yrl.pp-manager.tt@hitachi.com, Hidehiro Kawai List-Id: virtualization@lists.linuxfoundation.org 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. Changes in V2: - Fix a locking problem for error 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 | 23 ++++++++++++++++++++--- 1 file changed, 20 insertions(+), 3 deletions(-) -- Yoshihiro YUNOMAE Software Platform Research Dept. Linux Technology Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: yoshihiro.yunomae.ez@hitachi.com