In the Linux kernel, the following vulnerability has been resolved:
nvme: fix a possible use-after-free in controller reset during load
Unlike .queue_rq, in .submit_async_event drivers may not check the ctrl
readiness for AER submission. This may lead to a use-after-free
condition that was observed with nvme-tcp.
The race condition may happen in the following scenario:
In order to fix that, add ctrl state check to validate the ctrl
is actually able to accept the AER submission.
This addresses the above race in controller resets because the driver
during teardown should:
So after 1,2, any other AER command will find the
ctrl state to be RESETTING and bail out without submitting the AER.
git.kernel.org/stable/c/0ead57ceb21bbf15963b4874c2ac67143455382f
git.kernel.org/stable/c/0fa0f99fc84e41057cbdd2efbfe91c6b2f47dd9d
git.kernel.org/stable/c/70356b756a58704e5c8818cb09da5854af87e765
git.kernel.org/stable/c/9e956a2596ae276124ef0d96829c013dd0faf861
git.kernel.org/stable/c/a25e460fbb0340488d119fb2e28fe3f829b7417e
git.kernel.org/stable/c/e043fb5a0336ee74614e26f0d9f36f1f5bb6d606