From bc9e9cf0401f18e33b78d4c8a518661b8346baf7 Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Fri, 10 Aug 2018 11:23:56 -0400 Subject: dm crypt: don't decrease device limits dm-crypt should only increase device limits, it should not decrease them. This fixes a bug where the user could creates a crypt device with 1024 sector size on the top of scsi device that had 4096 logical block size. The limit 4096 would be lost and the user could incorrectly send 1024-I/Os to the crypt device. Cc: stable@vger.kernel.org Signed-off-by: Mikulas Patocka Signed-off-by: Mike Snitzer --- drivers/md/dm-crypt.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'drivers/md') diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index d412bd4b911c..f266c81f396f 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -3061,11 +3061,11 @@ static void crypt_io_hints(struct dm_target *ti, struct queue_limits *limits) */ limits->max_segment_size = PAGE_SIZE; - if (cc->sector_size != (1 << SECTOR_SHIFT)) { - limits->logical_block_size = cc->sector_size; - limits->physical_block_size = cc->sector_size; - blk_limits_io_min(limits, cc->sector_size); - } + limits->logical_block_size = + max_t(unsigned short, limits->logical_block_size, cc->sector_size); + limits->physical_block_size = + max_t(unsigned, limits->physical_block_size, cc->sector_size); + limits->io_min = max_t(unsigned, limits->io_min, cc->sector_size); } static struct target_type crypt_target = { -- cgit v1.2.3