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Message-ID: <1363685478-9997-1-git-send-email-vdavydov@parallels.com> Date: Tue, 19 Mar 2013 13:31:18 +0400 From: Vladimir Davydov <vdavydov@...allels.com> To: Al Viro <viro@...iv.linux.org.uk> CC: <linux-kernel@...r.kernel.org>, <devel@...nvz.org>, Doug Ledford <dledford@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, "Eric W. Biederman" <ebiederm@...ssion.com> Subject: [PATCH] mqueue: sys_mq_open: do not call mnt_drop_write() if read-only mnt_drop_write() must be called only if mnt_want_write() succeeded, otherwise the mnt_writers counter will diverge. Signed-off-by: Vladimir Davydov <vdavydov@...allels.com> Cc: Doug Ledford <dledford@...hat.com> Cc: Andrew Morton <akpm@...ux-foundation.org> Cc: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> Cc: "Eric W. Biederman" <ebiederm@...ssion.com> --- ipc/mqueue.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/ipc/mqueue.c b/ipc/mqueue.c index e5c4f60..3953fda 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -840,7 +840,8 @@ out_putfd: fd = error; } mutex_unlock(&root->d_inode->i_mutex); - mnt_drop_write(mnt); + if (!ro) + mnt_drop_write(mnt); out_putname: putname(name); return fd; -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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