kernel: nvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_iovec

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix NULL pointer dereferences in nvmettcpbuildpduiovec Commit efa56305908b "nvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length" added ttag bounds checking and dataoffset validation in...