On Mon, Apr 06, 2020 at 11:09:18AM +0200, Jiri Olsa wrote: > it could be called as bpf helper from any place we could put > the trampoline probe on.. so most of the kernel functions > (at entry or exit) .. we can make checks, like for context > before we allow to call it Hard NAK, then. If you can insert its call at the entry to e.g. umount_tree(), you will get deadlocks. The same for e.g. select_collect() (same effect on a different seqlock).
