cve-2024-42152
Vulnerability from cvelistv5
Published
2024-07-30 07:46
Modified
2024-12-19 09:14
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: nvmet: fix a possible leak when destroy a ctrl during qp establishment In nvmet_sq_destroy we capture sq->ctrl early and if it is non-NULL we know that a ctrl was allocated (in the admin connect request handler) and we need to release pending AERs, clear ctrl->sqs and sq->ctrl (for nvme-loop primarily), and drop the final reference on the ctrl. However, a small window is possible where nvmet_sq_destroy starts (as a result of the client giving up and disconnecting) concurrently with the nvme admin connect cmd (which may be in an early stage). But *before* kill_and_confirm of sq->ref (i.e. the admin connect managed to get an sq live reference). In this case, sq->ctrl was allocated however after it was captured in a local variable in nvmet_sq_destroy. This prevented the final reference drop on the ctrl. Solve this by re-capturing the sq->ctrl after all inflight request has completed, where for sure sq->ctrl reference is final, and move forward based on that. This issue was observed in an environment with many hosts connecting multiple ctrls simoutanuosly, creating a delay in allocating a ctrl leading up to this race window.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2f3c22b1d3d7e86712253244797a651998c141faPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5502c1f1d0d7472706cc1f201aecf1c935d302d1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/818004f2a380420c19872171be716174d4985e33Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/940a71f08ef153ef807f751310b0648d1fa5d0daPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b4fed1443a6571d49c6ffe7d97af3bbe5ee6dff5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c758b77d4a0a0ed3a1292b3fd7a2aeccd1a169a4Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2f3c22b1d3d7e86712253244797a651998c141faPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5502c1f1d0d7472706cc1f201aecf1c935d302d1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/818004f2a380420c19872171be716174d4985e33Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/940a71f08ef153ef807f751310b0648d1fa5d0daPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b4fed1443a6571d49c6ffe7d97af3bbe5ee6dff5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c758b77d4a0a0ed3a1292b3fd7a2aeccd1a169a4Patch
Impacted products
Vendor Product Version
Linux Linux
Show details on NVD website

To clipboard 

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