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-rw-r--r--ipc/msg.c4
-rw-r--r--ipc/sem.c4
-rw-r--r--ipc/shm.c5
-rw-r--r--ipc/util.c16
4 files changed, 18 insertions, 11 deletions
diff --git a/ipc/msg.c b/ipc/msg.c
index ccf5f495db7..fdf3db5731c 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -203,10 +203,10 @@ static int newque(struct ipc_namespace *ns, struct ipc_params *params)
* ipc_addid() locks msq
*/
id = ipc_addid(&msg_ids(ns), &msq->q_perm, ns->msg_ctlmni);
- if (id == -1) {
+ if (id < 0) {
security_msg_queue_free(msq);
ipc_rcu_putref(msq);
- return -ENOSPC;
+ return id;
}
msq->q_perm.id = msg_buildid(id, msq->q_perm.seq);
diff --git a/ipc/sem.c b/ipc/sem.c
index 7617f4f34ed..35952c0bae4 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -283,10 +283,10 @@ static int newary(struct ipc_namespace *ns, struct ipc_params *params)
}
id = ipc_addid(&sem_ids(ns), &sma->sem_perm, ns->sc_semmni);
- if(id == -1) {
+ if (id < 0) {
security_sem_free(sma);
ipc_rcu_putref(sma);
- return -ENOSPC;
+ return id;
}
ns->used_sems += nsems;
diff --git a/ipc/shm.c b/ipc/shm.c
index 05c97c7513c..3818fae625c 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -433,10 +433,11 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
if (IS_ERR(file))
goto no_file;
- error = -ENOSPC;
id = shm_addid(ns, shp);
- if(id == -1)
+ if (id < 0) {
+ error = id;
goto no_id;
+ }
shp->shm_cprid = task_tgid_vnr(current);
shp->shm_lprid = 0;
diff --git a/ipc/util.c b/ipc/util.c
index b42fbd58973..1aa0ebf71ba 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -262,7 +262,7 @@ int ipc_get_maxid(struct ipc_ids *ids)
* Add an entry 'new' to the IPC ids idr. The permissions object is
* initialised and the first free entry is set up and the id assigned
* is returned. The 'new' entry is returned in a locked state on success.
- * On failure the entry is not locked and -1 is returned.
+ * On failure the entry is not locked and a negative err-code is returned.
*
* Called with ipc_ids.rw_mutex held as a writer.
*/
@@ -275,11 +275,11 @@ int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size)
size = IPCMNI;
if (ids->in_use >= size)
- return -1;
+ return -ENOSPC;
err = idr_get_new(&ids->ipcs_idr, new, &id);
if (err)
- return -1;
+ return err;
ids->in_use++;
@@ -311,7 +311,7 @@ int ipcget_new(struct ipc_namespace *ns, struct ipc_ids *ids,
struct ipc_ops *ops, struct ipc_params *params)
{
int err;
-
+retry:
err = idr_pre_get(&ids->ipcs_idr, GFP_KERNEL);
if (!err)
@@ -321,6 +321,9 @@ int ipcget_new(struct ipc_namespace *ns, struct ipc_ids *ids,
err = ops->getnew(ns, params);
up_write(&ids->rw_mutex);
+ if (err == -EAGAIN)
+ goto retry;
+
return err;
}
@@ -374,7 +377,7 @@ int ipcget_public(struct ipc_namespace *ns, struct ipc_ids *ids,
struct kern_ipc_perm *ipcp;
int flg = params->flg;
int err;
-
+retry:
err = idr_pre_get(&ids->ipcs_idr, GFP_KERNEL);
/*
@@ -411,6 +414,9 @@ int ipcget_public(struct ipc_namespace *ns, struct ipc_ids *ids,
}
up_write(&ids->rw_mutex);
+ if (err == -EAGAIN)
+ goto retry;
+
return err;
}