Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock The fcport->unsol_ctx_head list is modified from several contexts without a common lock. Entries are added in qla2xxx_process_purls_iocb() from the response queue ISR (under the qpair qp_lock), while they are removed from qla2xxx_process_purls_pkt() (DPC/purex worker), qla_nvme_xmt_ls_rsp() (NVMe-FC transport callback) and qla_nvme_release_lsrsp_cmd_kref() (SRB completion). The qpair qp_lock cannot serialize this per-fcport list since multiqueue adapters add entries through different qpairs, so a concurrent add and delete (or two concurrent deletes) can corrupt the list pointers. Introduce a dedicated per-fcport spinlock, unsol_ctx_lock, initialized in qla2x00_alloc_fcport(), and take it around every list_add_tail()/list_del() on unsol_ctx_head. The add nests under the existing qp_lock; no delete path takes qp_lock, so the lock order is consistent and deadlock free.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 875386b98857822b77ac7f95bdf367b70af5b78c before 6c71726cdfda93ae169a75c7b1697eb870303125; affected 875386b98857822b77ac7f95bdf367b70af5b78c before c1ee12eecbab9674fb73c9e00a93fac655d5a5dc; affected 875386b98857822b77ac7f95bdf367b70af5b78c before b211d138cad86f749826d6132db6388eded992d8; affected 875386b98857822b77ac7f95bdf367b70af5b78c before 4d8ad6bc8cc5eff1870cef00a0d611f38f8b6bd0; affected 875386b98857822b77ac7f95bdf367b70af5b78c before 76da0c43c63eb0496649e372ac64466364d0fe7d |
| Linux / Linux | affected 6.6; unaffected 0 before 6.6; unaffected 6.6.160 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2.7 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/6c71726cdfda93ae169a75c7b1697eb870303125
- https://git.kernel.org/stable/c/c1ee12eecbab9674fb73c9e00a93fac655d5a5dc
- https://git.kernel.org/stable/c/b211d138cad86f749826d6132db6388eded992d8
- https://git.kernel.org/stable/c/4d8ad6bc8cc5eff1870cef00a0d611f38f8b6bd0
- https://git.kernel.org/stable/c/76da0c43c63eb0496649e372ac64466364d0fe7d