zhengbin b0393aadc2 block: fix NULL pointer dereference in register_disk
commit 4d7c1d3fd7 upstream.

If __device_add_disk-->bdi_register_owner-->bdi_register-->
bdi_register_va-->device_create_vargs fails, bdi->dev is still
NULL, __device_add_disk-->register_disk will visit bdi->dev->kobj.
This patch fixes that.

Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
2021-02-13 13:51:13 +01:00
2021-02-10 09:21:09 +01:00
2021-02-10 09:21:09 +01:00

Linux kernel
============

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