[PATCH -next 0/3] nbd: fix null-ptr-dereference while accessing 'nbd->config'

[Zhong Jinghua <zhongjinghua@huaweicloud.com>]

From: Zhong Jinghua <zhongjinghua@huawei.com>

nbd->config = config and refcount_set(&nbd->config_refs, 1) in
nbd_genl_connect may be out of order, causing config_refs to be set to 1
first, and then nbd_open accessing nbd->config reports a null pointer
reference.

Zhong Jinghua (3):
  nbd: fold nbd config initialization into nbd_alloc_config()
  nbd: factor out a helper to get nbd_config without holding
    'config_lock'
  nbd: fix null-ptr-dereference while accessing 'nbd->config'

 drivers/block/nbd.c | 82 +++++++++++++++++++++++++++++----------------
 1 file changed, 53 insertions(+), 29 deletions(-)

-- 
2.31.1