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block: validate interval_exp integrity limit

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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>
This commit is contained in:
Caleb Sander Mateos
2025-12-16 22:34:36 -07:00
committed by Jens Axboe
parent ccb8a3c08a
commit af65faf34f
1 changed files with 6 additions and 1 deletions
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7
block/blk-settings.c
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@@ -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