CVE-2024-27435 (GCVE-0-2024-27435)
Vulnerability from cvelistv5
Published
2024-05-17 12:12
Modified
2026-05-11 20:10
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: nvme: fix reconnection fail due to reserved tag allocation We found a issue on production environment while using NVMe over RDMA, admin_q reconnect failed forever while remote target and network is ok. After dig into it, we found it may caused by a ABBA deadlock due to tag allocation. In my case, the tag was hold by a keep alive request waiting inside admin_q, as we quiesced admin_q while reset ctrl, so the request maked as idle and will not process before reset success. As fabric_q shares tagset with admin_q, while reconnect remote target, we need a tag for connect command, but the only one reserved tag was held by keep alive command which waiting inside admin_q. As a result, we failed to reconnect admin_q forever. In order to fix this issue, I think we should keep two reserved tags for admin queue.
References
Impacted products
Vendor Product Version
Linux Linux Version: ed01fee283a067c72b2d6500046080dbc1bb9dae
Version: ed01fee283a067c72b2d6500046080dbc1bb9dae
Version: ed01fee283a067c72b2d6500046080dbc1bb9dae
Version: ed01fee283a067c72b2d6500046080dbc1bb9dae
Version: ed01fee283a067c72b2d6500046080dbc1bb9dae
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