CVE-2023-52589 Information

Description

In the Linux kernel the following vulnerability has been resolved:

media: rkisp1: Fix IRQ disable race issue

In rkisp1_isp_stop() and rkisp1_csi_disable() the driver masks the interrupts and then apparently assumes that the interrupt handler won’t be running and proceeds in the stop procedure. This is not the case as the interrupt handler can already be running which would lead to the ISP being disabled while the interrupt handler handling a captured frame.

This brings up two issues: 1) the ISP could be powered off while the interrupt handler is still running and accessing registers leading to board lockup and 2) the interrupt handler code and the code that disables the streaming might do things that conflict.

It is not clear to me if 2) causes a real issue but 1) can be seen with a suitable delay (or printk in my case) in the interrupt handler leading to board lockup.

Reference

https://git.kernel.org/stable/c/bf808f58681cab64c81cd814551814fd34e540fe https://git.kernel.org/stable/c/fab483438342984f2a315fe13c882a80f0f7e545 https://git.kernel.org/stable/c/7bb1a2822aa2c2de4e09bf7c56dd93bd532f1fa7 https://git.kernel.org/stable/c/870565f063a58576e8a4529f122cac4325c6b395