Merge linux-3.0.31 from korg into jellybean

Conflicts:
	arch/arm/mm/proc-v7.S
	drivers/base/core.c
	drivers/gpu/drm/i915/i915_gem_execbuffer.c
	drivers/gpu/drm/i915/intel_display.c
	drivers/gpu/drm/i915/intel_lvds.c
	drivers/gpu/drm/radeon/evergreen.c
	drivers/gpu/drm/radeon/r100.c
	drivers/gpu/drm/radeon/radeon_connectors.c
	drivers/gpu/drm/radeon/rs600.c
	drivers/usb/core/hub.c
	drivers/usb/host/xhci-pci.c
	drivers/usb/host/xhci.c
	drivers/usb/serial/qcserial.c
	fs/proc/base.c

Change-Id: Ia98b35db3f8c0bfd95817867d3acb85be8e5e772

4 files changed, 98 insertions, 80 deletions

diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index 7cf5c3e..c6602d2 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -417,17 +417,6 @@ static int ecryptfs_encrypt_extent(struct page *enc_extent_page,
 			(unsigned long long)(extent_base + extent_offset), rc);
 		goto out;
 	}
-	if (unlikely(ecryptfs_verbosity > 0)) {
-		ecryptfs_printk(KERN_DEBUG, "Encrypting extent "
-				"with iv:\n");
-		ecryptfs_dump_hex(extent_iv, crypt_stat->iv_bytes);
-		ecryptfs_printk(KERN_DEBUG, "First 8 bytes before "
-				"encryption:\n");
-		ecryptfs_dump_hex((char *)
-				  (page_address(page)
-				   + (extent_offset * crypt_stat->extent_size)),
-				  8);
-	}
 	rc = ecryptfs_encrypt_page_offset(crypt_stat, enc_extent_page, 0,
 					  page, (extent_offset
 						 * crypt_stat->extent_size),
@@ -440,14 +429,6 @@ static int ecryptfs_encrypt_extent(struct page *enc_extent_page,
 		goto out;
 	}
 	rc = 0;
-	if (unlikely(ecryptfs_verbosity > 0)) {
-		ecryptfs_printk(KERN_DEBUG, "Encrypt extent [0x%.16llx]; "
-			"rc = [%d]\n",
-			(unsigned long long)(extent_base + extent_offset), rc);
-		ecryptfs_printk(KERN_DEBUG, "First 8 bytes after "
-				"encryption:\n");
-		ecryptfs_dump_hex((char *)(page_address(enc_extent_page)), 8);
-	}
 out:
 	return rc;
 }
@@ -543,17 +524,6 @@ static int ecryptfs_decrypt_extent(struct page *page,
 			(unsigned long long)(extent_base + extent_offset), rc);
 		goto out;
 	}
-	if (unlikely(ecryptfs_verbosity > 0)) {
-		ecryptfs_printk(KERN_DEBUG, "Decrypting extent "
-				"with iv:\n");
-		ecryptfs_dump_hex(extent_iv, crypt_stat->iv_bytes);
-		ecryptfs_printk(KERN_DEBUG, "First 8 bytes before "
-				"decryption:\n");
-		ecryptfs_dump_hex((char *)
-				  (page_address(enc_extent_page)
-				   + (extent_offset * crypt_stat->extent_size)),
-				  8);
-	}
 	rc = ecryptfs_decrypt_page_offset(crypt_stat, page,
 					  (extent_offset
 					   * crypt_stat->extent_size),
@@ -567,16 +537,6 @@ static int ecryptfs_decrypt_extent(struct page *page,
 		goto out;
 	}
 	rc = 0;
-	if (unlikely(ecryptfs_verbosity > 0)) {
-		ecryptfs_printk(KERN_DEBUG, "Decrypt extent [0x%.16llx]; "
-			"rc = [%d]\n",
-			(unsigned long long)(extent_base + extent_offset), rc);
-		ecryptfs_printk(KERN_DEBUG, "First 8 bytes after "
-				"decryption:\n");
-		ecryptfs_dump_hex((char *)(page_address(page)
-					   + (extent_offset
-					      * crypt_stat->extent_size)), 8);
-	}
 out:
 	return rc;
 }
@@ -1618,7 +1578,8 @@ int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry)
 		rc = ecryptfs_read_xattr_region(page_virt, ecryptfs_inode);
 		if (rc) {
 			printk(KERN_DEBUG "Valid eCryptfs headers not found in "
-			       "file header region or xattr region\n");
+			       "file header region or xattr region, inode %lu\n",
+				ecryptfs_inode->i_ino);
 			rc = -EINVAL;
 			goto out;
 		}
@@ -1627,7 +1588,8 @@ int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry)
 						ECRYPTFS_DONT_VALIDATE_HEADER_SIZE);
 		if (rc) {
 			printk(KERN_DEBUG "Valid eCryptfs headers not found in "
-			       "file xattr region either\n");
+			       "file xattr region either, inode %lu\n",
+				ecryptfs_inode->i_ino);
 			rc = -EINVAL;
 		}
 		if (crypt_stat->mount_crypt_stat->flags
@@ -1638,7 +1600,8 @@ int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry)
 			       "crypto metadata only in the extended attribute "
 			       "region, but eCryptfs was mounted without "
 			       "xattr support enabled. eCryptfs will not treat "
-			       "this like an encrypted file.\n");
+			       "this like an encrypted file, inode %lu\n",
+				ecryptfs_inode->i_ino);
 			rc = -EINVAL;
 		}
 	}
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 876b25c..28f09c7 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -887,18 +887,6 @@ static int truncate_upper(struct dentry *dentry, struct iattr *ia,
 		size_t num_zeros = (PAGE_CACHE_SIZE
 				    - (ia->ia_size & ~PAGE_CACHE_MASK));
 
-
-		/*
-		 * XXX(truncate) this should really happen at the begginning
-		 * of ->setattr.  But the code is too messy to that as part
-		 * of a larger patch.  ecryptfs is also totally missing out
-		 * on the inode_change_ok check at the beginning of
-		 * ->setattr while would include this.
-		 */
-		rc = inode_newsize_ok(inode, ia->ia_size);
-		if (rc)
-			goto out;
-
 		if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
 			truncate_setsize(inode, ia->ia_size);
 			lower_ia->ia_size = ia->ia_size;
@@ -948,6 +936,28 @@ out:
 	return rc;
 }
 
+static int ecryptfs_inode_newsize_ok(struct inode *inode, loff_t offset)
+{
+	struct ecryptfs_crypt_stat *crypt_stat;
+	loff_t lower_oldsize, lower_newsize;
+
+	crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat;
+	lower_oldsize = upper_size_to_lower_size(crypt_stat,
+						 i_size_read(inode));
+	lower_newsize = upper_size_to_lower_size(crypt_stat, offset);
+	if (lower_newsize > lower_oldsize) {
+		/*
+		 * The eCryptfs inode and the new *lower* size are mixed here
+		 * because we may not have the lower i_mutex held and/or it may
+		 * not be appropriate to call inode_newsize_ok() with inodes
+		 * from other filesystems.
+		 */
+		return inode_newsize_ok(inode, lower_newsize);
+	}
+
+	return 0;
+}
+
 /**
  * ecryptfs_truncate
  * @dentry: The ecryptfs layer dentry
@@ -964,6 +974,10 @@ int ecryptfs_truncate(struct dentry *dentry, loff_t new_length)
 	struct iattr lower_ia = { .ia_valid = 0 };
 	int rc;
 
+	rc = ecryptfs_inode_newsize_ok(dentry->d_inode, new_length);
+	if (rc)
+		return rc;
+
 	rc = truncate_upper(dentry, &ia, &lower_ia);
 	if (!rc && lower_ia.ia_valid & ATTR_SIZE) {
 		struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
@@ -1045,6 +1059,16 @@ static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
 		}
 	}
 	mutex_unlock(&crypt_stat->cs_mutex);
+
+	rc = inode_change_ok(inode, ia);
+	if (rc)
+		goto out;
+	if (ia->ia_valid & ATTR_SIZE) {
+		rc = ecryptfs_inode_newsize_ok(inode, ia->ia_size);
+		if (rc)
+			goto out;
+	}
+
 	if (S_ISREG(inode->i_mode)) {
 		rc = filemap_write_and_wait(inode->i_mapping);
 		if (rc)
@@ -1128,6 +1152,8 @@ ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
 	}
 
 	rc = vfs_setxattr(lower_dentry, name, value, size, flags);
+	if (!rc)
+		fsstack_copy_attr_all(dentry->d_inode, lower_dentry->d_inode);
 out:
 	return rc;
 }
diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c
index 940a82e..0dc5a3d 100644
--- a/fs/ecryptfs/miscdev.c
+++ b/fs/ecryptfs/miscdev.c
@@ -409,11 +409,47 @@ ecryptfs_miscdev_write(struct file *file, const char __user *buf,
 	ssize_t sz = 0;
 	char *data;
 	uid_t euid = current_euid();
+	unsigned char packet_size_peek[3];
 	int rc;
 
-	if (count == 0)
+	if (count == 0) {
 		goto out;
+	} else if (count == (1 + 4)) {
+		/* Likely a harmless MSG_HELO or MSG_QUIT - no packet length */
+		goto memdup;
+	} else if (count < (1 + 4 + 1)
+		   || count > (1 + 4 + 2 + sizeof(struct ecryptfs_message) + 4
+			       + ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES)) {
+		printk(KERN_WARNING "%s: Acceptable packet size range is "
+		       "[%d-%lu], but amount of data written is [%zu].",
+		       __func__, (1 + 4 + 1),
+		       (1 + 4 + 2 + sizeof(struct ecryptfs_message) + 4
+			+ ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES), count);
+		return -EINVAL;
+	}
+
+	if (copy_from_user(packet_size_peek, (buf + 1 + 4),
+			   sizeof(packet_size_peek))) {
+		printk(KERN_WARNING "%s: Error while inspecting packet size\n",
+		       __func__);
+		return -EFAULT;
+	}
+
+	rc = ecryptfs_parse_packet_length(packet_size_peek, &packet_size,
+					  &packet_size_length);
+	if (rc) {
+		printk(KERN_WARNING "%s: Error parsing packet length; "
+		       "rc = [%d]\n", __func__, rc);
+		return rc;
+	}
+
+	if ((1 + 4 + packet_size_length + packet_size) != count) {
+		printk(KERN_WARNING "%s: Invalid packet size [%zu]\n", __func__,
+		       packet_size);
+		return -EINVAL;
+	}
 
+memdup:
 	data = memdup_user(buf, count);
 	if (IS_ERR(data)) {
 		printk(KERN_ERR "%s: memdup_user returned error [%ld]\n",
@@ -435,23 +471,7 @@ ecryptfs_miscdev_write(struct file *file, const char __user *buf,
 		}
 		memcpy(&counter_nbo, &data[i], 4);
 		seq = be32_to_cpu(counter_nbo);
-		i += 4;
-		rc = ecryptfs_parse_packet_length(&data[i], &packet_size,
-						  &packet_size_length);
-		if (rc) {
-			printk(KERN_WARNING "%s: Error parsing packet length; "
-			       "rc = [%d]\n", __func__, rc);
-			goto out_free;
-		}
-		i += packet_size_length;
-		if ((1 + 4 + packet_size_length + packet_size) != count) {
-			printk(KERN_WARNING "%s: (1 + packet_size_length([%zd])"
-			       " + packet_size([%zd]))([%zd]) != "
-			       "count([%zd]). Invalid packet format.\n",
-			       __func__, packet_size_length, packet_size,
-			       (1 + packet_size_length + packet_size), count);
-			goto out_free;
-		}
+		i += 4 + packet_size_length;
 		rc = ecryptfs_miscdev_response(&data[i], packet_size,
 					       euid, current_user_ns(),
 					       task_pid(current), seq);
diff --git a/fs/ecryptfs/read_write.c b/fs/ecryptfs/read_write.c
index 3745f7c..608c1c3 100644
--- a/fs/ecryptfs/read_write.c
+++ b/fs/ecryptfs/read_write.c
@@ -130,13 +130,18 @@ int ecryptfs_write(struct inode *ecryptfs_inode, char *data, loff_t offset,
 		pgoff_t ecryptfs_page_idx = (pos >> PAGE_CACHE_SHIFT);
 		size_t start_offset_in_page = (pos & ~PAGE_CACHE_MASK);
 		size_t num_bytes = (PAGE_CACHE_SIZE - start_offset_in_page);
-		size_t total_remaining_bytes = ((offset + size) - pos);
+		loff_t total_remaining_bytes = ((offset + size) - pos);
+
+		if (fatal_signal_pending(current)) {
+			rc = -EINTR;
+			break;
+		}
 
 		if (num_bytes > total_remaining_bytes)
 			num_bytes = total_remaining_bytes;
 		if (pos < offset) {
 			/* remaining zeros to write, up to destination offset */
-			size_t total_remaining_zeros = (offset - pos);
+			loff_t total_remaining_zeros = (offset - pos);
 
 			if (num_bytes > total_remaining_zeros)
 				num_bytes = total_remaining_zeros;
@@ -193,15 +198,19 @@ int ecryptfs_write(struct inode *ecryptfs_inode, char *data, loff_t offset,
 		}
 		pos += num_bytes;
 	}
-	if ((offset + size) > ecryptfs_file_size) {
-		i_size_write(ecryptfs_inode, (offset + size));
+	if (pos > ecryptfs_file_size) {
+		i_size_write(ecryptfs_inode, pos);
 		if (crypt_stat->flags & ECRYPTFS_ENCRYPTED) {
-			rc = ecryptfs_write_inode_size_to_metadata(
+			int rc2;
+
+			rc2 = ecryptfs_write_inode_size_to_metadata(
 								ecryptfs_inode);
-			if (rc) {
+			if (rc2) {
 				printk(KERN_ERR	"Problem with "
 				       "ecryptfs_write_inode_size_to_metadata; "
-				       "rc = [%d]\n", rc);
+				       "rc = [%d]\n", rc2);
+				if (!rc)
+					rc = rc2;
 				goto out;
 			}
 		}