LSM: move struct shmid_kernel out of ipc/shm.c to include/linux/shm.h

Also move where we set sma->sem_perm.mode and .key to before ipc_addid() gets called.

include/linux/shm.h

@@ -71,6 +71,19 @@ struct shm_info {
 };
 
 #ifdef __KERNEL__
+struct shmid_kernel /* private to the kernel */
+{	
+	struct kern_ipc_perm	shm_perm;
+	struct file *		shm_file;
+	int			id;
+	unsigned long		shm_nattch;
+	unsigned long		shm_segsz;
+	time_t			shm_atim;
+	time_t			shm_dtim;
+	time_t			shm_ctim;
+	pid_t			shm_cprid;
+	pid_t			shm_lprid;
+};
 
 /* shm_mode upper byte flags */
 #define	SHM_DEST	01000	/* segment will be destroyed on last detach */

ipc/sem.c

@@ -129,6 +129,10 @@ static int newary (key_t key, int nsems, int semflg)
 		return -ENOMEM;
 	}
 	memset (sma, 0, size);
+
+	sma->sem_perm.mode = (semflg & S_IRWXUGO);
+	sma->sem_perm.key = key;
+
 	id = ipc_addid(&sem_ids, &sma->sem_perm, sc_semmni);
 	if(id == -1) {
 		ipc_free(sma, size);
@@ -136,9 +140,6 @@ static int newary (key_t key, int nsems, int semflg)
 	}
 	used_sems += nsems;
 
-	sma->sem_perm.mode = (semflg & S_IRWXUGO);
-	sma->sem_perm.key = key;
-
 	sma->sem_base = (struct sem *) &sma[1];
 	/* sma->sem_pending = NULL; */
 	sma->sem_pending_last = &sma->sem_pending;

ipc/shm.c

@@ -28,20 +28,6 @@
 
 #include "util.h"
 
-struct shmid_kernel /* private to the kernel */
-{	
-	struct kern_ipc_perm	shm_perm;
-	struct file *		shm_file;
-	int			id;
-	unsigned long		shm_nattch;
-	unsigned long		shm_segsz;
-	time_t			shm_atim;
-	time_t			shm_dtim;
-	time_t			shm_ctim;
-	pid_t			shm_cprid;
-	pid_t			shm_lprid;
-};
-
 #define shm_flags	shm_perm.mode
 
 static struct file_operations shm_file_operations;
@@ -193,6 +179,10 @@ static int newseg (key_t key, int shmflg, size_t size)
 	shp = (struct shmid_kernel *) kmalloc (sizeof (*shp), GFP_USER);
 	if (!shp)
 		return -ENOMEM;
+
+	shp->shm_perm.key = key;
+	shp->shm_flags = (shmflg & S_IRWXUGO);
+
 	sprintf (name, "SYSV%08x", key);
 	file = shmem_file_setup(name, size);
 	error = PTR_ERR(file);
@@ -203,8 +193,7 @@ static int newseg (key_t key, int shmflg, size_t size)
 	id = shm_addid(shp);
 	if(id == -1) 
 		goto no_id;
-	shp->shm_perm.key = key;
-	shp->shm_flags = (shmflg & S_IRWXUGO);
+
 	shp->shm_cprid = current->pid;
 	shp->shm_lprid = 0;
 	shp->shm_atim = shp->shm_dtim = 0;