3 files changed, 69 insertions, 117 deletions

diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index a4799e971d1c..bbc3cc63854f 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -175,16 +175,16 @@ static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl)
 }
 
 /**
- * v9fs_read - read from a file (internal)
+ * v9fs_file_read - read from a file
  * @filep: file pointer to read
  * @data: data buffer to read data into
  * @count: size of buffer
  * @offset: offset at which to read data
  *
  */
-
 static ssize_t
-v9fs_read(struct file *filp, char *buffer, size_t count, loff_t * offset)
+v9fs_file_read(struct file *filp, char __user * data, size_t count,
+               loff_t * offset)
 {
         struct inode *inode = filp->f_dentry->d_inode;
         struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
@@ -194,6 +194,7 @@ v9fs_read(struct file *filp, char *buffer, size_t count, loff_t * offset)
         int rsize = 0;
         int result = 0;
         int total = 0;
+        int n;
 
         dprintk(DEBUG_VFS, "\n");
 
@@ -216,10 +217,15 @@ v9fs_read(struct file *filp, char *buffer, size_t count, loff_t * offset)
                 } else
                         *offset += result;
 
-                /* XXX - extra copy */
-                memcpy(buffer, fcall->params.rread.data, result);
+                n = copy_to_user(data, fcall->params.rread.data, result);
+                if (n) {
+                        dprintk(DEBUG_ERROR, "Problem copying to user %d\n", n);
+                        kfree(fcall);
+                        return -EFAULT;
+                }
+
                 count -= result;
-                buffer += result;
+                data += result;
                 total += result;
 
                 kfree(fcall);
@@ -232,42 +238,7 @@ v9fs_read(struct file *filp, char *buffer, size_t count, loff_t * offset)
 }
 
 /**
- * v9fs_file_read - read from a file
- * @filep: file pointer to read
- * @data: data buffer to read data into
- * @count: size of buffer
- * @offset: offset at which to read data
- *
- */
-
-static ssize_t
-v9fs_file_read(struct file *filp, char __user * data, size_t count,
-               loff_t * offset)
-{
-        int retval = -1;
-        int ret = 0;
-        char *buffer;
-
-        buffer = kmalloc(count, GFP_KERNEL);
-        if (!buffer)
-                return -ENOMEM;
-
-        retval = v9fs_read(filp, buffer, count, offset);
-        if (retval > 0) {
-                if ((ret = copy_to_user(data, buffer, retval)) != 0) {
-                        dprintk(DEBUG_ERROR, "Problem copying to user %d\n",
-                                ret);
-                        retval = ret;
-                }
-        }
-
-        kfree(buffer);
-
-        return retval;
-}
-
-/**
- * v9fs_write - write to a file
+ * v9fs_file_write - write to a file
  * @filep: file pointer to write
  * @data: data buffer to write data from
  * @count: size of buffer
@@ -276,7 +247,8 @@ v9fs_file_read(struct file *filp, char __user * data, size_t count,
  */
 
 static ssize_t
-v9fs_write(struct file *filp, char *buffer, size_t count, loff_t * offset)
+v9fs_file_write(struct file *filp, const char __user * data,
+                size_t count, loff_t * offset)
 {
         struct inode *inode = filp->f_dentry->d_inode;
         struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
@@ -286,30 +258,42 @@ v9fs_write(struct file *filp, char *buffer, size_t count, loff_t * offset)
         int result = -EIO;
         int rsize = 0;
         int total = 0;
+        char *buf;
 
-        dprintk(DEBUG_VFS, "data %p count %d offset %x\n", buffer, (int)count,
+        dprintk(DEBUG_VFS, "data %p count %d offset %x\n", data, (int)count,
                 (int)*offset);
         rsize = v9ses->maxdata - V9FS_IOHDRSZ;
         if (v9fid->iounit != 0 && rsize > v9fid->iounit)
                 rsize = v9fid->iounit;
 
-        dump_data(buffer, count);
+        buf = kmalloc(v9ses->maxdata - V9FS_IOHDRSZ, GFP_KERNEL);
+        if (!buf)
+                return -ENOMEM;
 
         do {
                 if (count < rsize)
                         rsize = count;
 
-                result =
-                    v9fs_t_write(v9ses, fid, *offset, rsize, buffer, &fcall);
+                result = copy_from_user(buf, data, rsize);
+                if (result) {
+                        dprintk(DEBUG_ERROR, "Problem copying from user\n");
+                        kfree(buf);
+                        return -EFAULT;
+                }
+
+                dump_data(buf, rsize);
+                result = v9fs_t_write(v9ses, fid, *offset, rsize, buf, &fcall);
                 if (result < 0) {
                         eprintk(KERN_ERR, "error while writing: %s(%d)\n",
                                 FCALL_ERROR(fcall), result);
                         kfree(fcall);
+                        kfree(buf);
                         return result;
                 } else
                         *offset += result;
 
                 kfree(fcall);
+                fcall = NULL;
 
                 if (result != rsize) {
                         eprintk(KERN_ERR,
@@ -319,46 +303,14 @@ v9fs_write(struct file *filp, char *buffer, size_t count, loff_t * offset)
                 }
 
                 count -= result;
-                buffer += result;
+                data += result;
                 total += result;
         } while (count);
 
+        kfree(buf);
         return total;
 }
 
-/**
- * v9fs_file_write - write to a file
- * @filep: file pointer to write
- * @data: data buffer to write data from
- * @count: size of buffer
- * @offset: offset at which to write data
- *
- */
-
-static ssize_t
-v9fs_file_write(struct file *filp, const char __user * data,
-                size_t count, loff_t * offset)
-{
-        int ret = -1;
-        char *buffer;
-
-        buffer = kmalloc(count, GFP_KERNEL);
-        if (buffer == NULL)
-                return -ENOMEM;
-
-        ret = copy_from_user(buffer, data, count);
-        if (ret) {
-                dprintk(DEBUG_ERROR, "Problem copying from user\n");
-                ret = -EFAULT;
-        } else {
-                ret = v9fs_write(filp, buffer, count, offset);
-        }
-
-        kfree(buffer);
-
-        return ret;
-}
-
 struct file_operations v9fs_file_operations = {
         .llseek = generic_file_llseek,
         .read = v9fs_file_read,
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 7976a238f0a3..d4b15576e584 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -905,7 +905,7 @@ static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
                 send_sig(SIGKILL, current, 0);
                 goto out_free_dentry;
         }
-        if (padzero(elf_bss)) {
+        if (likely(elf_bss != elf_brk) && unlikely(padzero(elf_bss))) {
                 send_sig(SIGSEGV, current, 0);
                 retval = -EFAULT; /* Nobody gets to see this, but.. */
                 goto out_free_dentry;
diff --git a/fs/nfs_common/nfsacl.c b/fs/nfs_common/nfsacl.c
index 251e5a1bb1c4..0c2be8c0307d 100644
--- a/fs/nfs_common/nfsacl.c
+++ b/fs/nfs_common/nfsacl.c
@@ -48,43 +48,26 @@ xdr_nfsace_encode(struct xdr_array2_desc *desc, void *elem)
                 (struct nfsacl_encode_desc *) desc;
         u32 *p = (u32 *) elem;
 
-        if (nfsacl_desc->count < nfsacl_desc->acl->a_count) {
-                struct posix_acl_entry *entry =
-                        &nfsacl_desc->acl->a_entries[nfsacl_desc->count++];
+        struct posix_acl_entry *entry =
+                &nfsacl_desc->acl->a_entries[nfsacl_desc->count++];
 
-                *p++ = htonl(entry->e_tag | nfsacl_desc->typeflag);
-                switch(entry->e_tag) {
-                        case ACL_USER_OBJ:
-                                *p++ = htonl(nfsacl_desc->uid);
-                                break;
-                        case ACL_GROUP_OBJ:
-                                *p++ = htonl(nfsacl_desc->gid);
-                                break;
-                        case ACL_USER:
-                        case ACL_GROUP:
-                                *p++ = htonl(entry->e_id);
-                                break;
-                        default:  /* Solaris depends on that! */
-                                *p++ = 0;
-                                break;
-                }
-                *p++ = htonl(entry->e_perm & S_IRWXO);
-        } else {
-                const struct posix_acl_entry *pa, *pe;
-                int group_obj_perm = ACL_READ|ACL_WRITE|ACL_EXECUTE;
-
-                FOREACH_ACL_ENTRY(pa, nfsacl_desc->acl, pe) {
-                        if (pa->e_tag == ACL_GROUP_OBJ) {
-                                group_obj_perm = pa->e_perm & S_IRWXO;
-                                break;
-                        }
-                }
-                /* fake up ACL_MASK entry */
-                *p++ = htonl(ACL_MASK | nfsacl_desc->typeflag);
-                *p++ = htonl(0);
-                *p++ = htonl(group_obj_perm);
+        *p++ = htonl(entry->e_tag | nfsacl_desc->typeflag);
+        switch(entry->e_tag) {
+                case ACL_USER_OBJ:
+                        *p++ = htonl(nfsacl_desc->uid);
+                        break;
+                case ACL_GROUP_OBJ:
+                        *p++ = htonl(nfsacl_desc->gid);
+                        break;
+                case ACL_USER:
+                case ACL_GROUP:
+                        *p++ = htonl(entry->e_id);
+                        break;
+                default:  /* Solaris depends on that! */
+                        *p++ = 0;
+                        break;
         }
-
+        *p++ = htonl(entry->e_perm & S_IRWXO);
         return 0;
 }
 
@@ -105,11 +88,28 @@ nfsacl_encode(struct xdr_buf *buf, unsigned int base, struct inode *inode,
                 .gid = inode->i_gid,
         };
         int err;
+        struct posix_acl *acl2 = NULL;
 
         if (entries > NFS_ACL_MAX_ENTRIES ||
             xdr_encode_word(buf, base, entries))
                 return -EINVAL;
+        if (encode_entries && acl && acl->a_count == 3) {
+                /* Fake up an ACL_MASK entry. */
+                acl2 = posix_acl_alloc(4, GFP_KERNEL);
+                if (!acl2)
+                        return -ENOMEM;
+                /* Insert entries in canonical order: other orders seem
+                 to confuse Solaris VxFS. */
+                acl2->a_entries[0] = acl->a_entries[0];  /* ACL_USER_OBJ */
+                acl2->a_entries[1] = acl->a_entries[1];  /* ACL_GROUP_OBJ */
+                acl2->a_entries[2] = acl->a_entries[1];  /* ACL_MASK */
+                acl2->a_entries[2].e_tag = ACL_MASK;
+                acl2->a_entries[3] = acl->a_entries[2];  /* ACL_OTHER */
+                nfsacl_desc.acl = acl2;
+        }
         err = xdr_encode_array2(buf, base + 4, &nfsacl_desc.desc);
+        if (acl2)
+                posix_acl_release(acl2);
         if (!err)
                 err = 8 + nfsacl_desc.desc.elem_size *
                           nfsacl_desc.desc.array_len;