This is a note to let you know that I've just added the patch titled
cifs: adjust sequence number downward after signing NT_CANCEL request
to the 3.7-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:
cifs-adjust-sequence-number-downward-after-signing-nt_cancel.patch
and it can be found in the queue-3.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 31efee60f489c759c341454d755a9fd13de8c03d Mon Sep 17 00:00:00 2001
From: Jeff Layton <[email protected]>
Date: Thu, 27 Dec 2012 08:05:03 -0500
Subject: cifs: adjust sequence number downward after signing NT_CANCEL request
From: Jeff Layton <[email protected]>
commit 31efee60f489c759c341454d755a9fd13de8c03d upstream.
When a call goes out, the signing code adjusts the sequence number
upward by two to account for the request and the response. An NT_CANCEL
however doesn't get a response of its own, it just hurries the server
along to get it to respond to the original request more quickly.
Therefore, we must adjust the sequence number back down by one after
signing a NT_CANCEL request.
Reported-by: Tim Perry <[email protected]>
Signed-off-by: Jeff Layton <[email protected]>
Signed-off-by: Steve French <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
fs/cifs/smb1ops.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/fs/cifs/smb1ops.c
+++ b/fs/cifs/smb1ops.c
@@ -53,6 +53,13 @@ send_nt_cancel(struct TCP_Server_Info *s
mutex_unlock(&server->srv_mutex);
return rc;
}
+
+ /*
+ * The response to this call was already factored into the sequence
+ * number when the call went out, so we must adjust it back downward
+ * after signing here.
+ */
+ --server->sequence_number;
rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
mutex_unlock(&server->srv_mutex);
Patches currently in stable-queue which might be from [email protected] are
queue-3.7/smb3-mounts-fail-with-access-denied-to-some-servers.patch
queue-3.7/cifs-adjust-sequence-number-downward-after-signing-nt_cancel.patch
queue-3.7/cifs-move-check-for-null-socket-into-smb_send_rqst.patch
queue-3.7/nfs-don-t-extend-writes-to-cover-entire-page-if-pagecache-is-invalid.patch
queue-3.7/nfs-don-t-zero-out-the-rest-of-the-page-if-we-hit-the-eof-on-a-dio-read.patch
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