From: Naohiro Aota <naohiro.aota@wdc.com>
To: linux-btrfs@vger.kernel.org, linux-block@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>, David Sterba <dsterba@suse.com>,
Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>,
Naohiro Aota <naohiro.aota@wdc.com>
Subject: [PATCH v3 1/3] block: fix arg type of bio_trim()
Date: Wed, 21 Jul 2021 21:43:32 +0900 [thread overview]
Message-ID: <4fc8537f6dbe0c27489a3431b3a3240013268031.1626871138.git.naohiro.aota@wdc.com> (raw)
In-Reply-To: <cover.1626871138.git.naohiro.aota@wdc.com>
From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
The function bio_trim has offset and size arguments that are declared
as int.
The callers of this function uses sector_t type when passing the offset
and size e,g. drivers/md/raid1.c:narrow_write_error() and
drivers/md/raid1.c:narrow_write_error().
Change offset and size arguments to sector_t type for bio_trim(). Also, add
WARN_ON_ONCE() to catch their overflow.
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
---
block/bio.c | 12 +++++++-----
include/linux/bio.h | 2 +-
include/linux/blk_types.h | 1 +
3 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/block/bio.c b/block/bio.c
index 44205dfb6b60..0bf2b865feaf 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1464,12 +1464,15 @@ EXPORT_SYMBOL(bio_split);
* @bio: bio to trim
* @offset: number of sectors to trim from the front of @bio
* @size: size we want to trim @bio to, in sectors
+ *
+ * This function is typically used for bios that are cloned and submitted
+ * to the underlying device in parts.
*/
-void bio_trim(struct bio *bio, int offset, int size)
+void bio_trim(struct bio *bio, sector_t offset, sector_t size)
{
- /* 'bio' is a cloned bio which we need to trim to match
- * the given offset and size.
- */
+ if (WARN_ON_ONCE(offset > BIO_MAX_SECTORS || size > BIO_MAX_SECTORS ||
+ offset + size > bio->bi_iter.bi_size))
+ return;
size <<= 9;
if (offset == 0 && size == bio->bi_iter.bi_size)
@@ -1480,7 +1483,6 @@ void bio_trim(struct bio *bio, int offset, int size)
if (bio_integrity(bio))
bio_integrity_trim(bio);
-
}
EXPORT_SYMBOL_GPL(bio_trim);
diff --git a/include/linux/bio.h b/include/linux/bio.h
index a0b4cfdf62a4..fb663152521e 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -379,7 +379,7 @@ static inline void bip_set_seed(struct bio_integrity_payload *bip,
#endif /* CONFIG_BLK_DEV_INTEGRITY */
-extern void bio_trim(struct bio *bio, int offset, int size);
+void bio_trim(struct bio *bio, sector_t offset, sector_t size);
extern struct bio *bio_split(struct bio *bio, int sectors,
gfp_t gfp, struct bio_set *bs);
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index db026b6ec15a..24dfb980fb3f 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -285,6 +285,7 @@ struct bio {
};
#define BIO_RESET_BYTES offsetof(struct bio, bi_max_vecs)
+#define BIO_MAX_SECTORS (UINT_MAX >> SECTOR_SHIFT)
/*
* bio flags
--
2.32.0
next prev parent reply other threads:[~2021-07-21 12:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-21 12:43 [PATCH v3 0/3] fix argument type of bio_trim() Naohiro Aota
2021-07-21 12:43 ` Naohiro Aota [this message]
2021-07-21 15:21 ` [PATCH v3 1/3] block: fix arg " Christoph Hellwig
2021-07-21 12:43 ` [PATCH v3 2/3] btrfs: fix argument type of btrfs_bio_clone_partial() Naohiro Aota
2021-07-21 15:23 ` Christoph Hellwig
2021-07-21 12:43 ` [PATCH v3 3/3] btrfs: drop unnecessary ASSERT from btrfs_submit_direct() Naohiro Aota
2021-07-21 16:04 ` David Sterba
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