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-rw-r--r--ipc/msg.c19
1 files changed, 10 insertions, 9 deletions
diff --git a/ipc/msg.c b/ipc/msg.c
index 82ca36bac13e..caca67368cb5 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -394,7 +394,7 @@ copy_msqid_from_user(struct msqid64_ds *out, void __user *buf, int version)
* NOTE: no locks must be held, the rwsem is taken inside this function.
*/
static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd,
- struct msqid64_ds *msqid64)
+ struct ipc64_perm *perm, int msg_qbytes)
{
struct kern_ipc_perm *ipcp;
struct msg_queue *msq;
@@ -404,7 +404,7 @@ static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd,
rcu_read_lock();
ipcp = ipcctl_obtain_check(ns, &msg_ids(ns), msqid, cmd,
- &msqid64->msg_perm, msqid64->msg_qbytes);
+ perm, msg_qbytes);
if (IS_ERR(ipcp)) {
err = PTR_ERR(ipcp);
goto out_unlock1;
@@ -426,18 +426,18 @@ static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd,
{
DEFINE_WAKE_Q(wake_q);
- if (msqid64->msg_qbytes > ns->msg_ctlmnb &&
+ if (msg_qbytes > ns->msg_ctlmnb &&
!capable(CAP_SYS_RESOURCE)) {
err = -EPERM;
goto out_unlock1;
}
ipc_lock_object(&msq->q_perm);
- err = ipc_update_perm(&msqid64->msg_perm, ipcp);
+ err = ipc_update_perm(perm, ipcp);
if (err)
goto out_unlock0;
- msq->q_qbytes = msqid64->msg_qbytes;
+ msq->q_qbytes = msg_qbytes;
msq->q_ctime = ktime_get_real_seconds();
/*
@@ -618,9 +618,10 @@ static long ksys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf, int ver
case IPC_SET:
if (copy_msqid_from_user(&msqid64, buf, version))
return -EFAULT;
- /* fallthru */
+ return msgctl_down(ns, msqid, cmd, &msqid64.msg_perm,
+ msqid64.msg_qbytes);
case IPC_RMID:
- return msgctl_down(ns, msqid, cmd, &msqid64);
+ return msgctl_down(ns, msqid, cmd, NULL, 0);
default:
return -EINVAL;
}
@@ -752,9 +753,9 @@ static long compat_ksys_msgctl(int msqid, int cmd, void __user *uptr, int versio
case IPC_SET:
if (copy_compat_msqid_from_user(&msqid64, uptr, version))
return -EFAULT;
- /* fallthru */
+ return msgctl_down(ns, msqid, cmd, &msqid64.msg_perm, msqid64.msg_qbytes);
case IPC_RMID:
- return msgctl_down(ns, msqid, cmd, &msqid64);
+ return msgctl_down(ns, msqid, cmd, NULL, 0);
default:
return -EINVAL;
}