In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
scsi: qla2xxx: Avoid req_q_map double-read in qla2x00_error_entry()<\/p>\n
qla2x00_error_entry() reads ha->req_q_map[que] twice: once for the NULL
\ncheck and again when assigning it to req. The map slot is cleared by
\nqla25xx_free_req_que() (ha->req_q_map[que_id] = NULL under mq_lock)
\nduring queue teardown, while the response-queue interrupt that drives
\nqla2x00_error_entry() is still registered (the IRQ is released later in
\nqla25xx_free_rsp_que()). If the slot is set to NULL between the two
\nreads, req becomes NULL and is dereferenced.<\/p>\n
Read the slot once into req and NULL-check the local before use. mq_lock
\nis a mutex and cannot be taken from interrupt context, so the single
\nread plus local check is the appropriate fix for the reported NULL
\ndereference.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
scsi: qla2xxx: Avoid req_q_map double-read in qla2x00_error_entry()<\/p>\n
qla2x00_error_entry() reads ha->req_q_map[que] twice: once for<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24532","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24532","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=24532"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24532"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24532"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}