From 659a37844abc00c3dc676bb1faed29c1dacbf59f Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sat, 31 Jul 2021 09:40:27 +0200 Subject: [PATCH] scsi: bsg-lib: Fix commands without data transfer in bsg_transport_sg_io_fn() Set ret to 0 after the initial permission checks to avoid leaking -EPERM for commands without data transfer. Link: https://lore.kernel.org/r/20210731074027.1185545-3-hch@lst.de Fixes: 75ca56409e5b ("scsi: bsg: Move the whole request execution into the SCSI/transport handlers") Signed-off-by: Christoph Hellwig Signed-off-by: Martin K. Petersen --- block/bsg-lib.c | 1 + 1 file changed, 1 insertion(+) diff --git a/block/bsg-lib.c b/block/bsg-lib.c index 239ebf747141..ccb98276c964 100644 --- a/block/bsg-lib.c +++ b/block/bsg-lib.c @@ -72,6 +72,7 @@ static int bsg_transport_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr, job->bidi_bio = NULL; } + ret = 0; if (hdr->dout_xfer_len) { ret = blk_rq_map_user(rq->q, rq, NULL, uptr64(hdr->dout_xferp), hdr->dout_xfer_len, GFP_KERNEL);