Merge branch 'master' into next

Conflicts:
	fs/namei.c

Manually merged per:

diff --cc fs/namei.c
index 734f2b5,bbc15c2..0000000
--- a/fs/namei.c
+++ b/fs/namei.c
@@@ -860,9 -848,8 +849,10 @@@ static int __link_path_walk(const char
  		nd->flags |= LOOKUP_CONTINUE;
  		err = exec_permission_lite(inode);
  		if (err == -EAGAIN)
- 			err = vfs_permission(nd, MAY_EXEC);
+ 			err = inode_permission(nd->path.dentry->d_inode,
+ 					       MAY_EXEC);
 +		if (!err)
 +			err = ima_path_check(&nd->path, MAY_EXEC);
   		if (err)
  			break;

@@@ -1525,14 -1506,9 +1509,14 @@@ int may_open(struct path *path, int acc
  		flag &= ~O_TRUNC;
  	}

- 	error = vfs_permission(nd, acc_mode);
+ 	error = inode_permission(inode, acc_mode);
  	if (error)
  		return error;
 +
- 	error = ima_path_check(&nd->path,
++	error = ima_path_check(path,
 +			       acc_mode & (MAY_READ | MAY_WRITE | MAY_EXEC));
 +	if (error)
 +		return error;
  	/*
  	 * An append-only file must be opened in append mode for writing.
  	 */

Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 28 insertions, 19 deletions

diff --git a/ipc/shm.c b/ipc/shm.c
index d39bd7637b1c..2bd4809508a4 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -76,7 +76,7 @@ void shm_init_ns(struct ipc_namespace *ns)
         ns->shm_ctlall = SHMALL;
         ns->shm_ctlmni = SHMMNI;
         ns->shm_tot = 0;
-        ipc_init_ids(&ns->ids[IPC_SHM_IDS]);
+        ipc_init_ids(&shm_ids(ns));
 }
 
 /*
@@ -369,14 +369,14 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
                 file = hugetlb_file_setup(name, size);
                 shp->mlock_user = current_user();
         } else {
-                int acctflag = VM_ACCOUNT;
+                int acctflag = 0;
                 /*
                  * Do not allow no accounting for OVERCOMMIT_NEVER, even
                  * if it's asked for.
                  */
                 if  ((shmflg & SHM_NORESERVE) &&
                                 sysctl_overcommit_memory != OVERCOMMIT_NEVER)
-                        acctflag = 0;
+                        acctflag = VM_NORESERVE;
                 file = shmem_file_setup(name, size, acctflag);
         }
         error = PTR_ERR(file);
@@ -442,7 +442,7 @@ static inline int shm_more_checks(struct kern_ipc_perm *ipcp,
         return 0;
 }
 
-asmlinkage long sys_shmget (key_t key, size_t size, int shmflg)
+SYSCALL_DEFINE3(shmget, key_t, key, size_t, size, int, shmflg)
 {
         struct ipc_namespace *ns;
         struct ipc_ops shm_ops;
@@ -567,11 +567,15 @@ static void shm_get_stat(struct ipc_namespace *ns, unsigned long *rss,
                         struct hstate *h = hstate_file(shp->shm_file);
                         *rss += pages_per_huge_page(h) * mapping->nrpages;
                 } else {
+#ifdef CONFIG_SHMEM
                         struct shmem_inode_info *info = SHMEM_I(inode);
                         spin_lock(&info->lock);
                         *rss += inode->i_mapping->nrpages;
                         *swp += info->swapped;
                         spin_unlock(&info->lock);
+#else
+                        *rss += inode->i_mapping->nrpages;
+#endif
                 }
 
                 total++;
@@ -623,7 +627,7 @@ out_up:
         return err;
 }
 
-asmlinkage long sys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
+SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf)
 {
         struct shmid_kernel *shp;
         int err, version;
@@ -646,7 +650,7 @@ asmlinkage long sys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
                 if (err)
                         return err;
 
-                memset(&shminfo,0,sizeof(shminfo));
+                memset(&shminfo, 0, sizeof(shminfo));
                 shminfo.shmmni = shminfo.shmseg = ns->shm_ctlmni;
                 shminfo.shmmax = ns->shm_ctlmax;
                 shminfo.shmall = ns->shm_ctlall;
@@ -671,7 +675,7 @@ asmlinkage long sys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
                 if (err)
                         return err;
 
-                memset(&shm_info,0,sizeof(shm_info));
+                memset(&shm_info, 0, sizeof(shm_info));
                 down_read(&shm_ids(ns).rw_mutex);
                 shm_info.used_ids = shm_ids(ns).in_use;
                 shm_get_stat (ns, &shm_info.shm_rss, &shm_info.shm_swp);
@@ -680,7 +684,7 @@ asmlinkage long sys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
                 shm_info.swap_successes = 0;
                 err = ipc_get_maxid(&shm_ids(ns));
                 up_read(&shm_ids(ns).rw_mutex);
-                if(copy_to_user (buf, &shm_info, sizeof(shm_info))) {
+                if (copy_to_user(buf, &shm_info, sizeof(shm_info))) {
                         err = -EFAULT;
                         goto out;
                 }
@@ -694,11 +698,6 @@ asmlinkage long sys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
                 struct shmid64_ds tbuf;
                 int result;
 
-                if (!buf) {
-                        err = -EFAULT;
-                        goto out;
-                }
-
                 if (cmd == SHM_STAT) {
                         shp = shm_lock(ns, shmid);
                         if (IS_ERR(shp)) {
@@ -714,7 +713,7 @@ asmlinkage long sys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
                         }
                         result = 0;
                 }
-                err=-EACCES;
+                err = -EACCES;
                 if (ipcperms (&shp->shm_perm, S_IRUGO))
                         goto out_unlock;
                 err = security_shm_shmctl(shp, cmd);
@@ -749,9 +748,7 @@ asmlinkage long sys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
                         goto out;
                 }
 
-                err = audit_ipc_obj(&(shp->shm_perm));
-                if (err)
-                        goto out_unlock;
+                audit_ipc_obj(&(shp->shm_perm));
 
                 if (!capable(CAP_IPC_LOCK)) {
                         uid_t euid = current_euid();
@@ -949,7 +946,7 @@ out_put_dentry:
         goto out_nattch;
 }
 
-asmlinkage long sys_shmat(int shmid, char __user *shmaddr, int shmflg)
+SYSCALL_DEFINE3(shmat, int, shmid, char __user *, shmaddr, int, shmflg)
 {
         unsigned long ret;
         long err;
@@ -965,7 +962,7 @@ asmlinkage long sys_shmat(int shmid, char __user *shmaddr, int shmflg)
  * detach and kill segment if marked destroyed.
  * The work is done in shm_close.
  */
-asmlinkage long sys_shmdt(char __user *shmaddr)
+SYSCALL_DEFINE1(shmdt, char __user *, shmaddr)
 {
         struct mm_struct *mm = current->mm;
         struct vm_area_struct *vma, *next;
@@ -1000,6 +997,7 @@ asmlinkage long sys_shmdt(char __user *shmaddr)
          */
         vma = find_vma(mm, addr);
 
+#ifdef CONFIG_MMU
         while (vma) {
                 next = vma->vm_next;
 
@@ -1044,6 +1042,17 @@ asmlinkage long sys_shmdt(char __user *shmaddr)
                 vma = next;
         }
 
+#else /* CONFIG_MMU */
+        /* under NOMMU conditions, the exact address to be destroyed must be
+         * given */
+        retval = -EINVAL;
+        if (vma->vm_start == addr && vma->vm_ops == &shm_vm_ops) {
+                do_munmap(mm, vma->vm_start, vma->vm_end - vma->vm_start);
+                retval = 0;
+        }
+
+#endif
+
         up_write(&mm->mmap_sem);
         return retval;
 }