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-rw-r--r--ipc/msg.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/ipc/msg.c b/ipc/msg.c
index 9e4310c..558aa91 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)) {
/*
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