6.15-stable review patch. If anyone has any objections, please let me know.
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From: Caleb Sander Mateos csander@purestorage.com
[ Upstream commit 43a67dd812c5d3de163c0b6971046b4a4b633d3f ]
blk_rq_integrity_map_user() creates the ubuf iter with ITER_DEST for write-direction operations and ITER_SOURCE for read-direction ones. This is backwards; writes use the user buffer as a source for metadata and reads use it as a destination. Switch to the rq_data_dir() helper, which maps writes to ITER_SOURCE (WRITE) and reads to ITER_DEST(READ).
Signed-off-by: Caleb Sander Mateos csander@purestorage.com Fixes: fe8f4ca7107e ("block: modify bio_integrity_map_user to accept iov_iter as argument") Link: https://lore.kernel.org/r/20250603184752.1185676-1-csander@purestorage.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- block/blk-integrity.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/block/blk-integrity.c b/block/blk-integrity.c index a1678f0a9f81f..e4e2567061f9d 100644 --- a/block/blk-integrity.c +++ b/block/blk-integrity.c @@ -117,13 +117,8 @@ int blk_rq_integrity_map_user(struct request *rq, void __user *ubuf, { int ret; struct iov_iter iter; - unsigned int direction;
- if (op_is_write(req_op(rq))) - direction = ITER_DEST; - else - direction = ITER_SOURCE; - iov_iter_ubuf(&iter, direction, ubuf, bytes); + iov_iter_ubuf(&iter, rq_data_dir(rq), ubuf, bytes); ret = bio_integrity_map_user(rq->bio, &iter); if (ret) return ret;