linux-kernel - [PATCH 6/7] block: add WARN() in bio

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 14 Jan 2021 15:47:22 +0000
From:   Satya Tangirala <satyat@...gle.com>
To:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Jens Axboe <axboe@...nel.dk>, Eric Biggers <ebiggers@...gle.com>,
        Satya Tangirala <satyat@...gle.com>
Subject: [PATCH 6/7] block: add WARN() in bio_split() for sector alignment

The number of sectors passed to bio_split() should be aligned to
blk_crypto_bio_sectors_alignment(). All callers have been updated to ensure
this, so add a WARN() if the number of sectors is not aligned.

Signed-off-by: Satya Tangirala <satyat@...gle.com>
---
 block/bio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/bio.c b/block/bio.c
index 1f2cc1fbe283..c5f577ee6b8d 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1472,6 +1472,7 @@ struct bio *bio_split(struct bio *bio, int sectors,
 
 	BUG_ON(sectors <= 0);
 	BUG_ON(sectors >= bio_sectors(bio));
+	WARN_ON(!IS_ALIGNED(sectors, blk_crypto_bio_sectors_alignment(bio)));
 
 	/* Zone append commands cannot be split */
 	if (WARN_ON_ONCE(bio_op(bio) == REQ_OP_ZONE_APPEND))
-- 
2.30.0.284.gd98b1dd5eaa7-goog