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-rw-r--r--ipc/msg.c7
-rw-r--r--ipc/shm.c5
-rw-r--r--ipc/util.c3
3 files changed, 8 insertions, 7 deletions
diff --git a/ipc/msg.c b/ipc/msg.c
index d0c6d967b390..996feb819248 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -199,9 +199,7 @@ static int newque(struct ipc_namespace *ns, struct ipc_params *params)
return retval;
}
- /*
- * ipc_addid() locks msq
- */
+ /* ipc_addid() locks msq upon success. */
id = ipc_addid(&msg_ids(ns), &msq->q_perm, ns->msg_ctlmni);
if (id < 0) {
security_msg_queue_free(msq);
@@ -218,7 +216,8 @@ static int newque(struct ipc_namespace *ns, struct ipc_params *params)
INIT_LIST_HEAD(&msq->q_receivers);
INIT_LIST_HEAD(&msq->q_senders);
- msg_unlock(msq);
+ spin_unlock(&msq->q_perm.lock);
+ rcu_read_unlock();
return msq->q_perm.id;
}
diff --git a/ipc/shm.c b/ipc/shm.c
index 85dc001634b1..bd2b14ef1bba 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -535,6 +535,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
shp->shm_nattch = 0;
shp->shm_file = file;
shp->shm_creator = current;
+
/*
* shmid gets reported as "inode#" in /proc/pid/maps.
* proc-ps tools use this. Changing this will break them.
@@ -543,7 +544,9 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
ns->shm_tot += numpages;
error = shp->shm_perm.id;
- shm_unlock(shp);
+
+ spin_unlock(&shp->shm_perm.lock);
+ rcu_read_unlock();
return error;
no_id:
diff --git a/ipc/util.c b/ipc/util.c
index 809ec5ec8122..399821ac0a9a 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -246,9 +246,8 @@ int ipc_get_maxid(struct ipc_ids *ids)
* is returned. The 'new' entry is returned in a locked state on success.
* On failure the entry is not locked and a negative err-code is returned.
*
- * Called with ipc_ids.rw_mutex held as a writer.
+ * Called with writer ipc_ids.rw_mutex held.
*/
-
int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size)
{
kuid_t euid;