linux-kernel - [PATCH 5.4 13/44] block: bio-integrity: Advance seed correctly for larger interval sizes

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Message-Id: <20220207103753.586711165@linuxfoundation.org>
Date:   Mon,  7 Feb 2022 12:06:29 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dmitry Monakhov <dmonakhov@...nvz.org>,
        Dmitry Ivanov <dmitry.ivanov2@....com>,
        Alexey Lyashkov <alexey.lyashkov@....com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 5.4 13/44] block: bio-integrity: Advance seed correctly for larger interval sizes

From: Martin K. Petersen <martin.petersen@...cle.com>

commit b13e0c71856817fca67159b11abac350e41289f5 upstream.

Commit 309a62fa3a9e ("bio-integrity: bio_integrity_advance must update
integrity seed") added code to update the integrity seed value when
advancing a bio. However, it failed to take into account that the
integrity interval might be larger than the 512-byte block layer
sector size. This broke bio splitting on PI devices with 4KB logical
blocks.

The seed value should be advanced by bio_integrity_intervals() and not
the number of sectors.

Cc: Dmitry Monakhov <dmonakhov@...nvz.org>
Cc: stable@...r.kernel.org
Fixes: 309a62fa3a9e ("bio-integrity: bio_integrity_advance must update integrity seed")
Tested-by: Dmitry Ivanov <dmitry.ivanov2@....com>
Reported-by: Alexey Lyashkov <alexey.lyashkov@....com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Link: https://lore.kernel.org/r/20220204034209.4193-1-martin.petersen@oracle.com
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 block/bio-integrity.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -380,7 +380,7 @@ void bio_integrity_advance(struct bio *b
 	struct blk_integrity *bi = blk_get_integrity(bio->bi_disk);
 	unsigned bytes = bio_integrity_bytes(bi, bytes_done >> 9);
 
-	bip->bip_iter.bi_sector += bytes_done >> 9;
+	bip->bip_iter.bi_sector += bio_integrity_intervals(bi, bytes_done >> 9);
 	bvec_iter_advance(bip->bip_vec, &bip->bip_iter, bytes);
 }