Author :
mpi
Date :
2025-02-17 13:28:26
Hash :c05afcd0 Message :Disable pagefault handling when unwinding userland stack.
When collecting userland stacktraces with dt(4), the probe may run in an
interrupt routine at IPL_VM or higher. Resolving pagefaults in this case
might result in panic or corrupt UVM data structures. Userland stack frames
cannot be trusted, a bogus frame pointer may force us into a page fault.
From Christian Ludwig, ok kettenis@