Messages in this thread Patch in this message | | | From | Vladimir Davydov <> | Subject | [PATCH] mqueue: sys_mq_open: do not call mnt_drop_write() if read-only | Date | Tue, 19 Mar 2013 13:31:18 +0400 |
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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@parallels.com> Cc: Doug Ledford <dledford@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: "Eric W. Biederman" <ebiederm@xmission.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
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