CVE-2024-27435
Vulnerability from cvelistv5
Published
2024-05-17 12:12
Modified
2024-12-19 08:54
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/262da920896e2f2ab0e3947d9dbee0aa09045818
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6851778504cdb49431809b4ba061903d5f592c96
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/de105068fead55ed5c07ade75e9c8e7f86a00d1d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ff2f90f88d78559802466ad1c84ac5bda4416b3a
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/262da920896e2f2ab0e3947d9dbee0aa09045818
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6851778504cdb49431809b4ba061903d5f592c96
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/de105068fead55ed5c07ade75e9c8e7f86a00d1d
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ff2f90f88d78559802466ad1c84ac5bda4416b3a
Impacted products
Vendor Product Version
Linux Linux Version: 5.12
Show details on NVD website

To clipboard 

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