Messages in this thread Patch in this message |  | | From | Akinobu Mita <> | Subject | [PATCH] btrfs: fix bio_size_ok() for max_sectors > 0xffff | Date | Mon, 18 Nov 2013 22:13:18 +0900 |
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The data type of max_sectors in queue settings is unsigned int. But this value is stored to the local variable whose type is unsigned short in bio_size_ok(). This can cause unexpected result when max_sectors > 0xffff.
Cc: Chris Mason <chris.mason@fusionio.com> Cc: linux-btrfs@vger.kernel.org Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> ---
This patch is only compile tested.
fs/btrfs/volumes.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 0db6370..92303f4 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -5394,7 +5394,7 @@ static int bio_size_ok(struct block_device *bdev, struct bio *bio, { struct bio_vec *prev; struct request_queue *q = bdev_get_queue(bdev); - unsigned short max_sectors = queue_max_sectors(q); + unsigned int max_sectors = queue_max_sectors(q); struct bvec_merge_data bvm = { .bi_bdev = bdev, .bi_sector = sector, -- 1.8.3.2
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