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Diffstat (limited to 'ipc/shm.c')
-rw-r--r--ipc/shm.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/ipc/shm.c b/ipc/shm.c
index 89fc354156cb..1fc3a61b443b 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -178,6 +178,7 @@ static void shm_rcu_free(struct rcu_head *head)
static inline void shm_rmid(struct ipc_namespace *ns, struct shmid_kernel *s)
{
+ list_del(&s->shm_clist);
ipc_rmid(&shm_ids(ns), &s->shm_perm);
}
@@ -268,14 +269,10 @@ static void shm_close(struct vm_area_struct *vma)
}
/* Called with ns->shm_ids(ns).rwsem locked */
-static int shm_try_destroy_current(int id, void *p, void *data)
+static void shm_mark_orphan(struct shmid_kernel *shp, struct ipc_namespace *ns)
{
- struct ipc_namespace *ns = data;
- struct kern_ipc_perm *ipcp = p;
- struct shmid_kernel *shp = container_of(ipcp, struct shmid_kernel, shm_perm);
-
- if (shp->shm_creator != current)
- return 0;
+ if (WARN_ON(shp->shm_creator != current)) /* Remove me when it works */
+ return;
/*
* Mark it as orphaned to destroy the segment when
@@ -289,13 +286,12 @@ static int shm_try_destroy_current(int id, void *p, void *data)
* is not set, it shouldn't be deleted here.
*/
if (!ns->shm_rmid_forced)
- return 0;
+ return;
if (shm_may_destroy(ns, shp)) {
shm_lock_by_ptr(shp);
shm_destroy(ns, shp);
}
- return 0;
}
/* Called with ns->shm_ids(ns).rwsem locked */
@@ -333,14 +329,17 @@ void shm_destroy_orphaned(struct ipc_namespace *ns)
void exit_shm(struct task_struct *task)
{
struct ipc_namespace *ns = task->nsproxy->ipc_ns;
+ struct shmid_kernel *shp, *n;
if (shm_ids(ns).in_use == 0)
return;
/* Destroy all already created segments, but not mapped yet */
down_write(&shm_ids(ns).rwsem);
- if (shm_ids(ns).in_use)
- idr_for_each(&shm_ids(ns).ipcs_idr, &shm_try_destroy_current, ns);
+ list_for_each_entry_safe(shp, n, &task->sysvshm.shm_clist, shm_clist)
+ shm_mark_orphan(shp, ns);
+ /* remove the list head from any segments still attached */
+ list_del(&task->sysvshm.shm_clist);
up_write(&shm_ids(ns).rwsem);
}
@@ -561,6 +560,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
shp->shm_nattch = 0;
shp->shm_file = file;
shp->shm_creator = current;
+ list_add(&shp->shm_clist, &current->sysvshm.shm_clist);
/*
* shmid gets reported as "inode#" in /proc/pid/maps.