kernel null pointer at nvme_tcp_init_iter[nvme_tcp] with blktests nvme-tcp/012

[Yi Zhang]

The issue was introduced after merge the NVMe updates

commit 0fd6456fd1f4c8f3ec5a2df6ed7f34458a180409 (HEAD)
Merge: 44d10e4b2f2c 0d7389718c32
Author: Jens Axboe <axboe at kernel.dk>
Date:   Tue Feb 2 07:12:06 2021 -0700

     Merge branch 'for-5.12/drivers' into for-next

     * for-5.12/drivers: (22 commits)
       nvme-tcp: use cancel tagset helper for tear down
       nvme-rdma: use cancel tagset helper for tear down
       nvme-tcp: add clean action for failed reconnection
       nvme-rdma: add clean action for failed reconnection
       nvme-core: add cancel tagset helpers
       nvme-core: get rid of the extra space
       nvme: add tracing of zns commands
       nvme: parse format nvm command details when tracing
       nvme: update enumerations for status codes
       nvmet: add lba to sect conversion helpers
       nvmet: remove extra variable in identify ns
       nvmet: remove extra variable in id-desclist
       nvmet: remove extra variable in smart log nsid
       nvme: refactor ns->ctrl by request
       nvme-tcp: pass multipage bvec to request iov_iter
       nvme-tcp: get rid of unused helper function
       nvme-tcp: fix wrong setting of request iov_iter
       nvme: support command retry delay for admin command
       nvme: constify static attribute_group structs
       nvmet-fc: use RCU proctection for assoc_list


On 2/6/21 11:08 AM, Yi Zhang wrote:
> blktests nvme-tcp/012