On Fri, 2015-07-24 at 12:52 +0200, Christoph Hellwig wrote: > On Thu, Jul 23, 2015 at 03:19:32PM -0700, Spencer Baugh wrote: > > From: Alexei Potashnik <alexei@xxxxxxxxxxxxxxx> > > > > If command didn't match a LUN and we're sending check condition, the > > target_cmd_complete ftrace point will crash because it assumes that > > cmd->t_task_cdb has been set. > > > > The fix will temporarily set t_task_cdb to the se_cmd buffer > > and copy first 6 bytes of cdb in there as soon as possible. > > At a later point t_task_cdb is reset to the correct buffer, > > but until then traces and printks don't cause a crash. > > This is too ugly to live. Just dropping the t_task_cdb dereference > from the trace point sounds like the simples quick fix for now, Yes, that is what I'd prefer as well. > and removing the crazy layering violation in iSCSI that opencode > target_submit_cmd is the proper long term fix. We've already been through this discussion a couple of years back when target_submit_cmd() first came into existence. The reason iscsi/iser-target continues to be a special case is due to immediate data vs. non immediate data and their respective command sequence number ordering requirements. --nab -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
