In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
HID: winwing: fix use-after-free in force feedback teardown<\/p>\n
winwing_init_ff() passes the driver’s private data, allocated with
\ndevm_kzalloc() in winwing_probe(), as the effect context to
\ninput_ff_create_memless(). The memoryless force-feedback core takes
\nownership of that pointer and frees it with kfree() from
\ninput_ff_destroy() (ml_ff_destroy()) when the input device is
\ndestroyed.<\/p>\n
Freeing a devm-managed allocation with kfree() is an invalid free, and
\nthe same object is then released again by devres when the HID device is
\ntorn down, a double free. As the allocation also embeds the LED class
\ndevices, their timers and work item live on freed memory and the slab
\ngets corrupted. This triggers on unbind, rmmod, hot-unplug and on system
\nsuspend, where the firmware cache walks the now-corrupt devres list.
\nKASAN reports:<\/p>\n
BUG: KASAN: invalid-free in input_ff_destroy
\n Allocated by task N:
\n winwing_probe<\/p>\n
Pass NULL as the memless context instead and fetch the driver data from
\nthe input device in winwing_play_effect(): the HID core already stores
\nthe hid_device as the input device’s drvdata. The force-feedback core
\nthen owns nothing that it must not free.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
HID: winwing: fix use-after-free in force feedback teardown<\/p>\n
winwing_init_ff() passes the driver’s private data, allocated with
\ndev<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41117","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41117","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=41117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}