CVE-2024-42152 (GCVE-0-2024-42152)

Vulnerability from cvelistv5 – Published: 2024-07-30 07:46 – Updated: 2025-11-03 22:02
VLAI?
Title
nvmet: fix a possible leak when destroy a ctrl during qp establishment
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a , < 2f3c22b1d3d7e86712253244797a651998c141fa (git)
Affected: 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a , < b4fed1443a6571d49c6ffe7d97af3bbe5ee6dff5 (git)
Affected: 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a , < 940a71f08ef153ef807f751310b0648d1fa5d0da (git)
Affected: 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a , < 5502c1f1d0d7472706cc1f201aecf1c935d302d1 (git)
Affected: 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a , < 818004f2a380420c19872171be716174d4985e33 (git)
Affected: 0f5be6a4ff7b3f8bf3db15f904e3e76797a43d9a , < c758b77d4a0a0ed3a1292b3fd7a2aeccd1a169a4 (git)
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    Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.10.222 , ≤ 5.10.* (semver)
Unaffected: 5.15.163 , ≤ 5.15.* (semver)
Unaffected: 6.1.98 , ≤ 6.1.* (semver)
Unaffected: 6.6.39 , ≤ 6.6.* (semver)
Unaffected: 6.9.9 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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