Merge 3.12-rc6 into driver-core-next

We want these fixes here too.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/ipc/msg.c b/ipc/msg.c
index 9e4310c546ae..558aa91186b6 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -695,6 +695,12 @@ long do_msgsnd(int msqid, long mtype, void __user *mtext,
                 if (ipcperms(ns, &msq->q_perm, S_IWUGO))
                         goto out_unlock0;
 
+                /* raced with RMID? */
+                if (msq->q_perm.deleted) {
+                        err = -EIDRM;
+                        goto out_unlock0;
+                }
+
                 err = security_msg_queue_msgsnd(msq, msg, msgflg);
                 if (err)
                         goto out_unlock0;
@@ -901,6 +907,13 @@ long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, int msgfl
                         goto out_unlock1;
 
                 ipc_lock_object(&msq->q_perm);
+
+                /* raced with RMID? */
+                if (msq->q_perm.deleted) {
+                        msg = ERR_PTR(-EIDRM);
+                        goto out_unlock0;
+                }
+
                 msg = find_msg(msq, &msgtyp, mode);
                 if (!IS_ERR(msg)) {
                         /*