It looks like this is the relevant option present in the upstream stable 6.8.1 defconfig but not in the 6.8.0-31-generic config that enables the defconfig kernel to load the Nvidia driver:
CONFIG_SHADOW_CALL_STACK=n
I suspect that the kernel team is not going to want to disable kernel support for the GCC shadow stack to fix this bug, so my guess is that we'll need to explore other potential fixes for this issue.
It looks like this is the relevant option present in the upstream stable 6.8.1 defconfig but not in the 6.8.0-31-generic config that enables the defconfig kernel to load the Nvidia driver:
CONFIG_ SHADOW_ CALL_STACK= n
I suspect that the kernel team is not going to want to disable kernel support for the GCC shadow stack to fix this bug, so my guess is that we'll need to explore other potential fixes for this issue.