David Binderman pointed out in this post:

http://marc.info/?l=linux-scsi&m=141924469523474&w=2

a sanity check that was flawed. See attached fix. Should
be applied to lk 3.19.0-rc1 and Christoph's branches.

ChangeLog:
     fix alloc_len sanity check in resp_rsup_opcodes()


---
  drivers/scsi/scsi_debug.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>