fix regression in SCSI_IOCTL_SEND_COMMAND
authorTony Battersby <tonyb@cybernetics.com>
Fri, 22 Aug 2014 19:53:35 +0000 (15:53 -0400)
committerJens Axboe <axboe@fb.com>
Fri, 22 Aug 2014 20:04:33 +0000 (15:04 -0500)
commit2ba136daa3ae1e881c9f586f283fcaa164767dce
treee10d432b6e8fe38d768aa3f9ba3c136ff9756ad7
parent6f4a16266fb3e58cd3e200eab51d2220ef92d604
fix regression in SCSI_IOCTL_SEND_COMMAND

blk_rq_set_block_pc() memsets rq->cmd to 0, so it should come
immediately after blk_get_request() to avoid overwriting the
user-supplied CDB.  Also check for failure to allocate rq.

Fixes: f27b087b81b7 ("block: add blk_rq_set_block_pc()")
Cc: <stable@vger.kernel.org> # 3.16.x
Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
block/scsi_ioctl.c