In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
wifi: rtw88: Add NULL check for chip->edcca_th in rtw_fw_adaptivity_result()<\/p>\n
It was recently reported that rtw_fw_adaptivity_result()
\nin fw.c dereferences rtwdev->chip->edcca_th without
\na NULL check. The issue is that devices with the
\n8821CE chip don’t define edcca_th in their chip
\ninfo. As a result, when rtw_fw_adaptivity_result()
\ntries to dereference it, the kernel triggers an oops.<\/p>\n
Add a NULL check for edcca_th before dereferencing
\nit in rtw_fw_adaptivity_result() in fw.c. Placing
\nthe check at the function entry avoids logging any
\ngarbage values.<\/p>\n
This change does not address the root cause for
\nthis behavior, but it prevents the NULL dereference
\nand the resulting oops while a more permanent solution
\nis developed.<\/p>\n
Tested on a 8822CE chip which defines edcca_th, so
\nthis issue is not present on it, but it still uses
\nthis driver and I can verify there are no regressions.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
wifi: rtw88: Add NULL check for chip->edcca_th in rtw_fw_adaptivity_result()<\/p>\n
It was recently reported that rtw_fw_adaptivity_resul<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-28748","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/28748","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=28748"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28748"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28748"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}