CVSROOT: /cvs
Module name: src
Changes by: m...@cvs.openbsd.org 2025/02/17 06:28:26
Modified files:
sys/arch/amd64/amd64: db_trace.c
sys/arch/i386/i386: db_trace.c
Log 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@
