In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
pinctrl: devicetree: don’t free uninitialized dev_name on error path<\/p>\n
dt_remember_or_free_map() duplicates dev_name for each map entry. If
\nkstrdup_const() fails, dt_free_map() frees dev_name in all num_maps
\nentries, including entries that have not been initialized.<\/p>\n
Some pinctrl drivers, including pinctrl-imx, allocate the map with
\nkmalloc() and leave dev_name for the core to initialize. The untouched
\nentries therefore contain uninitialized data which is passed to
\nkfree_const().<\/p>\n
Reproduced on qemu’s mcimx6ul-evk (pinctrl-imx) with failslab injection
\nwhile binding the pinctrl-consuming device, under KASAN:<\/p>\n
BUG: KASAN: double-free in dt_free_map+0x34\/0xa4
\n Free of addr c425a900 by task init\/1
\n kfree from dt_free_map+0x34\/0xa4
\n dt_free_map from dt_remember_or_free_map+0x184\/0x198
\n dt_remember_or_free_map from pinctrl_dt_to_map+0x33c\/0x4c8
\n pinctrl_dt_to_map from create_pinctrl+0x9c\/0x5c0<\/p>\n
Initialize all dev_name fields to NULL before duplicating the device
\nname, making the full-map cleanup safe after a partial failure.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
pinctrl: devicetree: don’t free uninitialized dev_name on error path<\/p>\n
dt_remember_or_free_map() duplicates dev_name for each map en<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7520","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7520","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=7520"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7520"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7520"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}