From: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
To: Amit Shah <amit.shah@redhat.com>, linux-kernel@vger.kernel.org
Cc: Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
virtualization@lists.linux-foundation.org,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
yrl.pp-manager.tt@hitachi.com,
Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Subject: [PATCH V2 0/2] [BUGFIX] virtio/console: Fix two bugs of splice_write
Date: Fri, 19 Jul 2013 18:19:51 +0900 [thread overview]
Message-ID: <20130719091951.9698.95194.stgit@yunodevel> (raw)
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
next reply other threads:[~2013-07-19 9:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-19 9:19 Yoshihiro YUNOMAE [this message]
2013-07-19 9:19 ` [PATCH V2 1/2] [BUGFIX] virtio/console: Quit from splice_write if pipe->nrbufs is 0 Yoshihiro YUNOMAE
2013-07-19 12:25 ` Masami Hiramatsu
2013-07-19 9:19 ` [PATCH V2 2/2] [BUGFIX] virtio/console: Add pipe_lock/unlock for splice_write Yoshihiro YUNOMAE
2013-07-19 10:05 ` [PATCH V2 0/2] [BUGFIX] virtio/console: Fix two bugs of splice_write Amit Shah
2013-07-22 1:05 ` Yoshihiro YUNOMAE
[not found] ` <20130719091956.9698.30207.stgit@yunodevel>
2013-07-19 12:26 ` [PATCH V2 2/2] [BUGFIX] virtio/console: Add pipe_lock/unlock for splice_write Masami Hiramatsu
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