Messages in this thread Patch in this message | | | Subject | [PATCH] block: Fix bad range check in bio_sector_offset | From | "Martin K. Petersen" <> | Date | Tue, 28 Aug 2012 14:03:18 -0400 |
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DM would occasionally end up splitting data integrity-enabled requests incorrectly. The culprit was a bad range check in bio_sector_offset.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Cc: <stable@vger.kernel.org>
diff --git a/fs/bio.c b/fs/bio.c index 9bfade8..b9a6744 100644 --- a/fs/bio.c +++ b/fs/bio.c @@ -1552,8 +1552,8 @@ sector_t bio_sector_offset(struct bio *bio, unsigned short index, sector_sz = queue_logical_block_size(bio->bi_bdev->bd_disk->queue); sectors = 0; - if (index >= bio->bi_idx) - index = bio->bi_vcnt - 1; + if (index > bio->bi_vcnt) + return 0; __bio_for_each_segment(bv, bio, i, 0) { if (i == index) {
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