CVE-2024-27435

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxed01fee283a067c72b2d6500046080dbc1bb9dae < 149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8affected
LinuxLinuxed01fee283a067c72b2d6500046080dbc1bb9dae < ff2f90f88d78559802466ad1c84ac5bda4416b3aaffected
LinuxLinuxed01fee283a067c72b2d6500046080dbc1bb9dae < 6851778504cdb49431809b4ba061903d5f592c96affected
LinuxLinuxed01fee283a067c72b2d6500046080dbc1bb9dae < 262da920896e2f2ab0e3947d9dbee0aa09045818affected
LinuxLinuxed01fee283a067c72b2d6500046080dbc1bb9dae < de105068fead55ed5c07ade75e9c8e7f86a00d1daffected
LinuxLinux5.12affected
LinuxLinux0 < 5.12unaffected
LinuxLinux6.1.83 <= 6.1.*unaffected
LinuxLinux6.6.23 <= 6.6.*unaffected
LinuxLinux6.7.11 <= 6.7.*unaffected
LinuxLinux6.8.2 <= 6.8.*unaffected
LinuxLinux6.9 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References