From af65faf34f6e9919bdd2912770d25d2a73cbcc7c Mon Sep 17 00:00:00 2001 From: Caleb Sander Mateos Date: Tue, 16 Dec 2025 22:34:36 -0700 Subject: [PATCH] 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 Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe --- block/blk-settings.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/block/blk-settings.c b/block/blk-settings.c index d138abc973bb..a9e65dc090da 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -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 -- 2.47.3