linux-kernel - Re: [ 037/221] iscsi-target: Fix bug in handling of ExpStatSN ACK during u32 wrap-around

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Message-ID: <1358429844.15692.134.camel@deadeye.wl.decadent.org.uk>
Date:	Thu, 17 Jan 2013 13:37:24 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	alan@...rguk.ukuu.org.uk, Steve Hodgson <steve@...estorage.com>,
	Roland Dreier <roland@...estorage.com>,
	Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: Re: [ 037/221] iscsi-target: Fix bug in handling of ExpStatSN ACK
 during u32 wrap-around

On Tue, 2013-01-15 at 10:49 -0800, Greg Kroah-Hartman wrote:
> 3.7-stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Steve Hodgson <steve@...estorage.com>
> 
> commit 64c13330a38935120501b19c97a3e6095747c7a1 upstream.
> 
> This patch fixes a bug in the hanlding of initiator provided ExpStatSN and
> individual iscsi_cmd->stat_sn comparision during iscsi_conn->stat_sn
> wrap-around within iscsit_ack_from_expstatsn() code.
> 
> This bug would manifest itself as iscsi_cmd descriptors not being Acked
> by a lower ExpStatSn, causing them to be leaked until an iSCSI connection
> or session reinstatement event occurs to release all commands.
> 
> Also fix up two other uses of incorrect CmdSN SNA comparison to use wrapper
> usage from include/scsi/iscsi_proto.h.
[...]

You'll need to add this fix:

commit 64fe4f4f181cc2fe97d4176bf6ee6e3725ae33ec
Author: Roland Dreier <roland@...estorage.com>
Date:   Mon Jan 7 11:45:16 2013 -0800

    iscsi-target: Fix CmdSN comparison (use cmd->cmd_sn instead of cmd->stat_sn)

Ben.

-- 
Ben Hutchings
I'm not a reverse psychological virus.  Please don't copy me into your sig.

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