drm/vc4: hdmi: Avoid hang with debug registers when suspended
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 88% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
drm/vc4: hdmi: Avoid hang with debug registers when suspended
Trying to read /sys/kernel/debug/dri/1/hdmi1_regs
when the hdmi is disconnected results in a fatal system hang.
This is due to the pm suspend code disabling the dvp clock.
That is just a gate of the 108MHz clock in DVP_HT_RPI_MISC_CONFIG,
which results in accesses hanging AXI bus.
Protect against this.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/0ea29bd7d9400d3629683244d609358ed1b12075https://git.kernel.org/stable/c/16f351adf733a182224ad24916d7673aa6df02dfhttps://git.kernel.org/stable/c/223ee2567a55e4f80315c768d2969e6a3b9fb23dhttps://git.kernel.org/stable/c/74f21be9990a42dc2357bcf87a13e16c6998b90ehttps://git.kernel.org/stable/c/c7d474974954d9af7e0092021223d58f2de128dfhttps://lists.debian.org/debian-lts-announce/2025/03/msg00001.html