Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ed01fee283a067c72b2d6500046080dbc1bb9dae before 149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8; affected ed01fee283a067c72b2d6500046080dbc1bb9dae before ff2f90f88d78559802466ad1c84ac5bda4416b3a; affected ed01fee283a067c72b2d6500046080dbc1bb9dae before 6851778504cdb49431809b4ba061903d5f592c96; affected ed01fee283a067c72b2d6500046080dbc1bb9dae before 262da920896e2f2ab0e3947d9dbee0aa09045818; affected ed01fee283a067c72b2d6500046080dbc1bb9dae before de105068fead55ed5c07ade75e9c8e7f86a00d1d |
| Linux / Linux | affected 5.12; unaffected 0 before 5.12; unaffected 6.1.83 through 6.1.*; unaffected 6.6.23 through 6.6.*; unaffected 6.7.11 through 6.7.*; unaffected 6.8.2 through 6.8.*; unaffected 6.9 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8
- https://git.kernel.org/stable/c/ff2f90f88d78559802466ad1c84ac5bda4416b3a
- https://git.kernel.org/stable/c/6851778504cdb49431809b4ba061903d5f592c96
- https://git.kernel.org/stable/c/262da920896e2f2ab0e3947d9dbee0aa09045818
- https://git.kernel.org/stable/c/de105068fead55ed5c07ade75e9c8e7f86a00d1d
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- https://git.kernel.org/stable/c/149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8
- https://git.kernel.org/stable/c/ff2f90f88d78559802466ad1c84ac5bda4416b3a
- https://git.kernel.org/stable/c/6851778504cdb49431809b4ba061903d5f592c96
- https://git.kernel.org/stable/c/262da920896e2f2ab0e3947d9dbee0aa09045818
- https://git.kernel.org/stable/c/de105068fead55ed5c07ade75e9c8e7f86a00d1d