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authorChaitanya Kulkarni <chaitanya.kulkarni@wdc.com>2021-07-21 15:43:32 +0300
committerDavid Sterba <dsterba@suse.com>2021-08-23 14:19:08 +0300
commite83502ca5f1e1f03fb1393008ec22d17e7dc9882 (patch)
tree06c37c2389e478cfd1edd9033b6ff0e22c3677ea /block/bio.c
parent5662c967c69dfd162a0667d69bad776939bedf85 (diff)
downloadlinux-e83502ca5f1e1f03fb1393008ec22d17e7dc9882.tar.xz
block: fix argument type of bio_trim()
The function bio_trim has offset and size arguments that are declared as int. The callers of this function use 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. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'block/bio.c')
-rw-r--r--block/bio.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/block/bio.c b/block/bio.c
index 1fab762e079b..77cadcba93b9 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1463,12 +1463,15 @@ 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)
@@ -1479,7 +1482,6 @@ void bio_trim(struct bio *bio, int offset, int size)
if (bio_integrity(bio))
bio_integrity_trim(bio);
-
}
EXPORT_SYMBOL_GPL(bio_trim);