mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-12-27 10:01:39 -05:00
Code Issues Packages Projects Releases Wiki Activity

block: validate interval_exp integrity limit

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

7
block/blk-settings.c
View File

@@ -193,8 +193,13 @@ static int blk_validate_integrity_limits(struct queue_limits *lim)
break; break;
} }
if (!bi->interval_exp) if (!bi->interval_exp) {
bi->interval_exp = ilog2(lim->logical_block_size); 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 * The PI generation / validation helpers do not expect intervals to