CVE-2021-47328 Information

Description

In the Linux kernel the following vulnerability has been resolved:

scsi: iscsi: Fix conn use after free during resets

If we haven’t done a unbind target call we can race where iscsi_conn_teardown wakes up the EH thread and then frees the conn while those threads are still accessing the conn ehwait.

We can only do one TMF per session so this just moves the TMF fields from the conn to the session. We can then rely on the iscsi_session_teardown->iscsi_remove_session->__iscsi_unbind_session call to remove the target and it’s devices and know after that point there is no device or scsi-ml callout trying to access the session.

Reference

https://git.kernel.org/stable/c/bf20d85a88384574fabb3d53ad62a8af57e7ab11 https://git.kernel.org/stable/c/d04958a348e560938410e04a12fb99da9c7e6a00 https://git.kernel.org/stable/c/89812e7957ab0746eab66ed6fc49d52bb4dca250 https://git.kernel.org/stable/c/f0a031f7c55ffd944fead1ddaf2aa94df9a158c1 https://git.kernel.org/stable/c/fa9542b35ceb4202e8f8d65f440529a63524dca9 https://git.kernel.org/stable/c/ec29d0ac29be366450a7faffbcf8cba3a6a3b506