In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock<\/p>\n
The fcport->unsol_ctx_head list is modified from several contexts without
\na common lock. Entries are added in qla2xxx_process_purls_iocb() from the
\nresponse queue ISR (under the qpair qp_lock), while they are removed from
\nqla2xxx_process_purls_pkt() (DPC\/purex worker), qla_nvme_xmt_ls_rsp()
\n(NVMe-FC transport callback) and qla_nvme_release_lsrsp_cmd_kref() (SRB
\ncompletion). The qpair qp_lock cannot serialize this per-fcport list since
\nmultiqueue adapters add entries through different qpairs, so a concurrent
\nadd and delete (or two concurrent deletes) can corrupt the list pointers.<\/p>\n
Introduce a dedicated per-fcport spinlock, unsol_ctx_lock, initialized in
\nqla2x00_alloc_fcport(), and take it around every list_add_tail()\/list_del()
\non unsol_ctx_head. The add nests under the existing qp_lock; no delete path
\ntakes qp_lock, so the lock order is consistent and deadlock free.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock<\/p>\n
The fcport->unsol_ctx_head list is modified from several conte<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-28959","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/28959","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=28959"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28959"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28959"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}