Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a before 2f3c22b1d3d7e86712253244797a651998c141fa; affected 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a before b4fed1443a6571d49c6ffe7d97af3bbe5ee6dff5; affected 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a before 940a71f08ef153ef807f751310b0648d1fa5d0da; affected 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a before 5502c1f1d0d7472706cc1f201aecf1c935d302d1; affected 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a before 818004f2a380420c19872171be716174d4985e33; affected 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a before c758b77d4a0a0ed3a1292b3fd7a2aeccd1a169a4 |
| Linux / Linux | affected 5.6; unaffected 0 before 5.6; unaffected 5.10.222 through 5.10.*; unaffected 5.15.163 through 5.15.*; unaffected 6.1.98 through 6.1.*; unaffected 6.6.39 through 6.6.*; unaffected 6.9.9 through 6.9.*; unaffected 6.10 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/2f3c22b1d3d7e86712253244797a651998c141fa
- https://git.kernel.org/stable/c/b4fed1443a6571d49c6ffe7d97af3bbe5ee6dff5
- https://git.kernel.org/stable/c/940a71f08ef153ef807f751310b0648d1fa5d0da
- https://git.kernel.org/stable/c/5502c1f1d0d7472706cc1f201aecf1c935d302d1
- https://git.kernel.org/stable/c/818004f2a380420c19872171be716174d4985e33
- https://git.kernel.org/stable/c/c758b77d4a0a0ed3a1292b3fd7a2aeccd1a169a4
ADP enrichment
No English description supplied.
- https://git.kernel.org/stable/c/2f3c22b1d3d7e86712253244797a651998c141fa
- https://git.kernel.org/stable/c/b4fed1443a6571d49c6ffe7d97af3bbe5ee6dff5
- https://git.kernel.org/stable/c/940a71f08ef153ef807f751310b0648d1fa5d0da
- https://git.kernel.org/stable/c/5502c1f1d0d7472706cc1f201aecf1c935d302d1
- https://git.kernel.org/stable/c/818004f2a380420c19872171be716174d4985e33
- https://git.kernel.org/stable/c/c758b77d4a0a0ed3a1292b3fd7a2aeccd1a169a4
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
No English description supplied.
No references supplied.