On Mon, Jul 17, 2017 at 07:44:50PM -0500, Jason L Tibbitts III wrote: > and confirmed that clean unpatched 4.12 shows the problem, while > reverting just that patch fixes the issue. Unfortunately I don't know > enough to actually fix this, but I can easily test patches.
This is fixed with: commit 68c59fcea1f2c6a54c62aa896cc623c1b5bc9b47 Author: Johannes Thumshirn <[email protected]> Date: Fri Jul 7 10:56:38 2017 +0200 scsi: sg: fix SG_DXFER_FROM_DEV transfers SG_DXFER_FROM_DEV transfers do not necessarily have a dxferp as we set it to NULL for the old sg_io read/write interface, but must have a length bigger than 0. This fixes a regression introduced by commit 28676d869bbb ("scsi: sg: check for valid direction before starting the request") Signed-off-by: Johannes Thumshirn <[email protected]> Fixes: 28676d869bbb ("scsi: sg: check for valid direction before starting the request") Reported-by: Chris Clayton <[email protected]> Tested-by: Chris Clayton <[email protected]> Cc: Douglas Gilbert <[email protected]> Reviewed-by: Hannes Reinecke <[email protected]> Tested-by: Chris Clayton <[email protected]> Acked-by: Douglas Gilbert <[email protected]> Signed-off-by: Martin K. Petersen <[email protected]> -- Johannes Thumshirn Storage [email protected] +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
