That commit seems to be part of some x86 kprobes restructuring, I hesitated to try it. After your email tried to cherry-pick to 4.4.y and it does not go in smoothly at all, quite a bit of conflicts.
I may not phrase it correctly: My point was that in 4.4 there are more places where synthesize_reljump function is called, which latter got removed. And this function modifies kprobes page, so lifting up read-only protection needs to be done in more places compared to latter kernels. Whether it can be done correctly and proper thing to do in do_debug/resume_execution function exception processing context I cannot tell.
Thanks, Victor
thanks,
greg k-h
Hi Victor, Hi Greg,
Alexey Makhalov (+cc) ported the fix to kernel 4.4 2 weeks ago. https://www.spinics.net/lists/stable/msg245223.html
It applies cleanly to 4.4.139.
Regards, Jack