Commit af65faf3 authored Dec 16, 2025 by Caleb Sander Mateos Committed by Jens Axboe Dec 18, 2025

block: validate interval_exp integrity limit



Various code assumes that the integrity interval is at least 1 sector
and evenly divides the logical block size. Add these checks to
blk_validate_integrity_limits(). This guards against block drivers that
report invalid interval_exp values.

Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent ccb8a3c0

block/blk-settings.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -193,8 +193,13 @@ static int blk_validate_integrity_limits(struct queue_limits *lim)
		break;
		}

		if (!bi->interval_exp)
		if (!bi->interval_exp) {
		bi->interval_exp = ilog2(lim->logical_block_size);
		} else if (bi->interval_exp < SECTOR_SHIFT \|\|
		bi->interval_exp > ilog2(lim->logical_block_size)) {
		pr_warn("invalid interval_exp %u\n", bi->interval_exp);
		return -EINVAL;
		}

		/*
		* The PI generation / validation helpers do not expect intervals to