Patch "SMB3: GUIDs should be constructed as random but valid uuids" has been added to the 4.8-stable tree

Patch "SMB3: GUIDs should be constructed as random but valid uuids" has been added to the 4.8-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    SMB3: GUIDs should be constructed as random but valid uuids

to the 4.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     smb3-guids-should-be-constructed-as-random-but-valid-uuids.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From fa70b87cc6641978b20e12cc5d517e9ffc0086d4 Mon Sep 17 00:00:00 2001
From: Steve French <smfrench@gmail.com>
Date: Thu, 22 Sep 2016 00:39:34 -0500
Subject: SMB3: GUIDs should be constructed as random but valid uuids

From: Steve French <smfrench@gmail.com>

commit fa70b87cc6641978b20e12cc5d517e9ffc0086d4 upstream.

GUIDs although random, and 16 bytes, need to be generated as
proper uuids.

Signed-off-by: Steve French <steve.french@primarydata.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Reported-by: David Goebels <davidgoe@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/cifs/cifsfs.c  |    2 +-
 fs/cifs/connect.c |    2 +-
 fs/cifs/smb2ops.c |    2 +-
 fs/cifs/smb2pdu.c |    2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -271,7 +271,7 @@ cifs_alloc_inode(struct super_block *sb)
 	cifs_inode->createtime = 0;
 	cifs_inode->epoch = 0;
 #ifdef CONFIG_CIFS_SMB2
-	get_random_bytes(cifs_inode->lease_key, SMB2_LEASE_KEY_SIZE);
+	generate_random_uuid(cifs_inode->lease_key);
 #endif
 	/*
 	 * Can not set i_flags here - they get immediately overwritten to zero
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2163,7 +2163,7 @@ cifs_get_tcp_session(struct smb_vol *vol
 	memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
 		sizeof(tcp_ses->dstaddr));
 #ifdef CONFIG_CIFS_SMB2
-	get_random_bytes(tcp_ses->client_guid, SMB2_CLIENT_GUID_SIZE);
+	generate_random_uuid(tcp_ses->client_guid);
 #endif
 	/*
 	 * at this point we are the only ones with the pointer
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1042,7 +1042,7 @@ smb2_set_lease_key(struct inode *inode,
 static void
 smb2_new_lease_key(struct cifs_fid *fid)
 {
-	get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
+	generate_random_uuid(fid->lease_key);
 }
 
 #define SMB2_SYMLINK_STRUCT_SIZE \
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1183,7 +1183,7 @@ create_durable_v2_buf(struct cifs_fid *p
 
 	buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
 	buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
-	get_random_bytes(buf->dcontext.CreateGuid, 16);
+	generate_random_uuid(buf->dcontext.CreateGuid);
 	memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
 
 	/* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */


Patches currently in stable-queue which might be from smfrench@gmail.com are

queue-4.8/fix-regression-which-breaks-dfs-mounting.patch
queue-4.8/cleanup-missing-frees-on-some-ioctls.patch
queue-4.8/smb3-guids-should-be-constructed-as-random-but-valid-uuids.patch
queue-4.8/clarify-locking-of-cifs-file-and-tcon-structures-and-make-more-granular.patch
queue-4.8/do-not-send-smb3-set_info-request-if-nothing-is-changing.patch
queue-4.8/set-previous-session-id-correctly-on-smb3-reconnect.patch
queue-4.8/cifs-limit-the-overall-credit-acquired.patch
queue-4.8/fs-cifs-keep-guid-when-assigning-fid-to-fileinfo.patch
queue-4.8/display-number-of-credits-available.patch