Commit abfc426d1b2f ("block: pass a block_device to bio_clone_fast")
calls the modified bio_alloc_clone() in bcache code as:
bio_init_clone(bio->bi_bdev, bio, orig_bio, GFP_NOIO);
But the first parameter is wrong, where bio->bi_bdev should be
orig_bio->bi_bdev. The wrong bi_bdev panics the kernel when submitting
cache bio.
This patch fixes the wrong bdev parameter usage and avoid the panic.
Fixes: abfc426d1b2f ("block: pass a block_device to bio_clone_fast")
Signed-off-by: Coly Li <colyli@xxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Mike Snitzer <snitzer@xxxxxxxxxx>
---
drivers/md/bcache/request.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index fdd0194f84dd..320fcdfef48e 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -685,7 +685,7 @@ static void do_bio_hook(struct search *s,
{
struct bio *bio = &s->bio.bio;
- bio_init_clone(bio->bi_bdev, bio, orig_bio, GFP_NOIO);
+ bio_init_clone(orig_bio->bi_bdev, bio, orig_bio, GFP_NOIO);
/*
* bi_end_io can be set separately somewhere else, e.g. the
* variants in,
--
2.34.1
