CVE-2022-49460

In the Linux kernel, the following vulnerability has been resolved:

PM / devfreq: rk3399_dmc: Disable edev on remove()

Otherwise we hit an unablanced enable-count when unbinding the DFI device:

[ 1279.659119] ————[ cut here ]———— [ 1279.659179] WARNING: CPU: 2 PID: 5638 at drivers/devfreq/devfreq-event.c:360 devfreq_event_remove_edev+0x84/0x8c … [ 1279.659352] Hardware name: Google Kevin (DT) [ 1279.659363] pstate: 80400005 (Nzcv daif +PAN -UAO -TCO BTYPE=–) [ 1279.659371] pc : devfreq_event_remove_edev+0x84/0x8c [ 1279.659380] lr : devm_devfreq_event_release+0x1c/0x28 … [ 1279.659571] Call trace: [ 1279.659582] devfreq_event_remove_edev+0x84/0x8c [ 1279.659590] devm_devfreq_event_release+0x1c/0x28 [ 1279.659602] release_nodes+0x1cc/0x244 [ 1279.659611] devres_release_all+0x44/0x60 [ 1279.659621] device_release_driver_internal+0x11c/0x1ac [ 1279.659629] device_driver_detach+0x20/0x2c [ 1279.659641] unbind_store+0x7c/0xb0 [ 1279.659650] drv_attr_store+0x2c/0x40 [ 1279.659663] sysfs_kf_write+0x44/0x58 [ 1279.659672] kernfs_fop_write_iter+0xf4/0x190 [ 1279.659684] vfs_write+0x2b0/0x2e4 [ 1279.659693] ksys_write+0x80/0xec [ 1279.659701] __arm64_sys_write+0x24/0x30 [ 1279.659714] el0_svc_common+0xf0/0x1d8 [ 1279.659724] do_el0_svc_compat+0x28/0x3c [ 1279.659738] el0_svc_compat+0x10/0x1c [ 1279.659746] el0_sync_compat_handler+0xa8/0xcc [ 1279.659758] el0_sync_compat+0x188/0x1c0 [ 1279.659768] —[ end trace cec200e5094155b4 ]—

Affected Software

References

• https://git.kernel.org/stable/c/2fccf9e6050e0e3b8b4cd275d41daf7f7fa22804
• https://git.kernel.org/stable/c/664736e2cc09e504ce58ec61164d029d1f2651bb
• https://git.kernel.org/stable/c/86b091b6894c449d2734de7aa7d79ccb33ffd97d
• https://git.kernel.org/stable/c/a0180e324a9a63de8f770da300477b48cb4a53f1
• https://git.kernel.org/stable/c/a9c2b23a7ac6ab19214cad8cac8af8608a4d9cef
• https://git.kernel.org/stable/c/cb1be1d4be18fe286ba5a67d928598378fd7fbe5
• https://git.kernel.org/stable/c/fb089b6f21de03a685dd31df3789bbb01c59f8e3