Re: [RESEND] [PATCH] Hold back_lock when calling iscsi_complete_task

[Johannes Thumshirn <jthumshirn@suse.de>]

On 22/02/2019 17:29, Lee Duncan wrote:
> From: Lee Duncan <lduncan@suse.com>
> 
> If there is an error queueing an iscsi command in
> iscsi_queuecommand(), for example if the transport fails
> to take the command in sessuin->tt->xmit_task(), then
> the error path can call iscsi_complete_task() without
> first aquiring the back_lock as required. This can
> lead to things like ITT pool can get corrupt, resulting
> in duplicate ITTs being sent out.
> 
> The solution is to hold the back_lock around
> iscsi_complete_task() calls, and to add a little commenting
> to help others understand when back_lock must be held.

You're missing a S-o-b here.

Byte,
	Johannes
-- 
Johannes Thumshirn                            SUSE Labs Filesystems
jthumshirn@suse.de                                +49 911 74053 689
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