Merge branch 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

Pull namespace updates from Eric Biederman:
 "There was a lot of work this cycle fixing bugs that were discovered
  after the merge window and getting everything ready where we can
  reasonably support fully unprivileged fuse. The bug fixes you already
  have and much of the unprivileged fuse work is coming in via other
  trees.

  Still left for fully unprivileged fuse is figuring out how to cleanly
  handle .set_acl and .get_acl in the legacy case, and properly handling
  of evm xattrs on unprivileged mounts.

  Included in the tree is a cleanup from Alexely that replaced a linked
  list with a statically allocated fix sized array for the pid caches,
  which simplifies and speeds things up.

  Then there is are some cleanups and fixes for the ipc namespace. The
  motivation was that in reviewing other code it was discovered that
  access ipc objects from different pid namespaces recorded pids in such
  a way that when asked the wrong pids were returned. In the worst case
  there has been a measured 30% performance impact for sysvipc
  semaphores. Other test cases showed no measurable performance impact.
  Manfred Spraul and Davidlohr Bueso who tend to work on sysvipc
  performance both gave the nod that this is good enough.

  Casey Schaufler and James Morris have given their approval to the LSM
  side of the changes.

  I simplified the types and the code dealing with sysvipc to pass just
  kern_ipc_perm for all three types of ipc. Which reduced the header
  dependencies throughout the kernel and simplified the lsm code.

  Which let me work on the pid fixes without having to worry about
  trivial changes causing complete kernel recompiles"

* 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  ipc/shm: Fix pid freeing.
  ipc/shm: fix up for struct file no longer being available in shm.h
  ipc/smack: Tidy up from the change in type of the ipc security hooks
  ipc: Directly call the security hook in ipc_ops.associate
  ipc/sem: Fix semctl(..., GETPID, ...) between pid namespaces
  ipc/msg: Fix msgctl(..., IPC_STAT, ...) between pid namespaces
  ipc/shm: Fix shmctl(..., IPC_STAT, ...) between pid namespaces.
  ipc/util: Helpers for making the sysvipc operations pid namespace aware
  ipc: Move IPCMNI from include/ipc.h into ipc/util.h
  msg: Move struct msg_queue into ipc/msg.c
  shm: Move struct shmid_kernel into ipc/shm.c
  sem: Move struct sem and struct sem_array into ipc/sem.c
  msg/security: Pass kern_ipc_perm not msg_queue into the msg_queue security hooks
  shm/security: Pass kern_ipc_perm not shmid_kernel into the shm security hooks
  sem/security: Pass kern_ipc_perm not sem_array into the sem security hooks
  pidns: simpler allocation of pid_* caches

1 files changed, 32 insertions, 35 deletions

diff --git a/include/linux/security.h b/include/linux/security.h
index 73f1ef625d40..128e1e4a5346 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -36,7 +36,6 @@ struct linux_binprm;
 struct cred;
 struct rlimit;
 struct siginfo;
-struct sem_array;
 struct sembuf;
 struct kern_ipc_perm;
 struct audit_context;
@@ -50,9 +49,7 @@ struct qstr;
 struct iattr;
 struct fown_struct;
 struct file_operations;
-struct shmid_kernel;
 struct msg_msg;
-struct msg_queue;
 struct xattr;
 struct xfrm_sec_ctx;
 struct mm_struct;
@@ -355,24 +352,24 @@ int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag);
 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid);
 int security_msg_msg_alloc(struct msg_msg *msg);
 void security_msg_msg_free(struct msg_msg *msg);
-int security_msg_queue_alloc(struct msg_queue *msq);
-void security_msg_queue_free(struct msg_queue *msq);
-int security_msg_queue_associate(struct msg_queue *msq, int msqflg);
-int security_msg_queue_msgctl(struct msg_queue *msq, int cmd);
-int security_msg_queue_msgsnd(struct msg_queue *msq,
+int security_msg_queue_alloc(struct kern_ipc_perm *msq);
+void security_msg_queue_free(struct kern_ipc_perm *msq);
+int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg);
+int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd);
+int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
 			      struct msg_msg *msg, int msqflg);
-int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
+int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
 			      struct task_struct *target, long type, int mode);
-int security_shm_alloc(struct shmid_kernel *shp);
-void security_shm_free(struct shmid_kernel *shp);
-int security_shm_associate(struct shmid_kernel *shp, int shmflg);
-int security_shm_shmctl(struct shmid_kernel *shp, int cmd);
-int security_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg);
-int security_sem_alloc(struct sem_array *sma);
-void security_sem_free(struct sem_array *sma);
-int security_sem_associate(struct sem_array *sma, int semflg);
-int security_sem_semctl(struct sem_array *sma, int cmd);
-int security_sem_semop(struct sem_array *sma, struct sembuf *sops,
+int security_shm_alloc(struct kern_ipc_perm *shp);
+void security_shm_free(struct kern_ipc_perm *shp);
+int security_shm_associate(struct kern_ipc_perm *shp, int shmflg);
+int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd);
+int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg);
+int security_sem_alloc(struct kern_ipc_perm *sma);
+void security_sem_free(struct kern_ipc_perm *sma);
+int security_sem_associate(struct kern_ipc_perm *sma, int semflg);
+int security_sem_semctl(struct kern_ipc_perm *sma, int cmd);
+int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
 			unsigned nsops, int alter);
 void security_d_instantiate(struct dentry *dentry, struct inode *inode);
 int security_getprocattr(struct task_struct *p, char *name, char **value);
@@ -1045,32 +1042,32 @@ static inline int security_msg_msg_alloc(struct msg_msg *msg)
 static inline void security_msg_msg_free(struct msg_msg *msg)
 { }
 
-static inline int security_msg_queue_alloc(struct msg_queue *msq)
+static inline int security_msg_queue_alloc(struct kern_ipc_perm *msq)
 {
 	return 0;
 }
 
-static inline void security_msg_queue_free(struct msg_queue *msq)
+static inline void security_msg_queue_free(struct kern_ipc_perm *msq)
 { }
 
-static inline int security_msg_queue_associate(struct msg_queue *msq,
+static inline int security_msg_queue_associate(struct kern_ipc_perm *msq,
 					       int msqflg)
 {
 	return 0;
 }
 
-static inline int security_msg_queue_msgctl(struct msg_queue *msq, int cmd)
+static inline int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
 {
 	return 0;
 }
 
-static inline int security_msg_queue_msgsnd(struct msg_queue *msq,
+static inline int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
 					    struct msg_msg *msg, int msqflg)
 {
 	return 0;
 }
 
-static inline int security_msg_queue_msgrcv(struct msg_queue *msq,
+static inline int security_msg_queue_msgrcv(struct kern_ipc_perm *msq,
 					    struct msg_msg *msg,
 					    struct task_struct *target,
 					    long type, int mode)
@@ -1078,50 +1075,50 @@ static inline int security_msg_queue_msgrcv(struct msg_queue *msq,
 	return 0;
 }
 
-static inline int security_shm_alloc(struct shmid_kernel *shp)
+static inline int security_shm_alloc(struct kern_ipc_perm *shp)
 {
 	return 0;
 }
 
-static inline void security_shm_free(struct shmid_kernel *shp)
+static inline void security_shm_free(struct kern_ipc_perm *shp)
 { }
 
-static inline int security_shm_associate(struct shmid_kernel *shp,
+static inline int security_shm_associate(struct kern_ipc_perm *shp,
 					 int shmflg)
 {
 	return 0;
 }
 
-static inline int security_shm_shmctl(struct shmid_kernel *shp, int cmd)
+static inline int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
 {
 	return 0;
 }
 
-static inline int security_shm_shmat(struct shmid_kernel *shp,
+static inline int security_shm_shmat(struct kern_ipc_perm *shp,
 				     char __user *shmaddr, int shmflg)
 {
 	return 0;
 }
 
-static inline int security_sem_alloc(struct sem_array *sma)
+static inline int security_sem_alloc(struct kern_ipc_perm *sma)
 {
 	return 0;
 }
 
-static inline void security_sem_free(struct sem_array *sma)
+static inline void security_sem_free(struct kern_ipc_perm *sma)
 { }
 
-static inline int security_sem_associate(struct sem_array *sma, int semflg)
+static inline int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
 {
 	return 0;
 }
 
-static inline int security_sem_semctl(struct sem_array *sma, int cmd)
+static inline int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
 {
 	return 0;
 }
 
-static inline int security_sem_semop(struct sem_array *sma,
+static inline int security_sem_semop(struct kern_ipc_perm *sma,
 				     struct sembuf *sops, unsigned nsops,
 				     int alter)
 {