Andreas Kling 931e4b7f5e Kernel+SystemMonitor: Prevent userspace access to process ELF image ...

Every process keeps its own ELF executable mapped in memory in case we
need to do symbol lookup (for backtraces, etc.)

Until now, it was mapped in a way that made it accessible to the
program, despite the program not having mapped it itself.
I don't really see a need for userspace to have access to this right
now, so let's lock things down a little bit.

This patch makes it inaccessible to userspace and exposes that fact
through /proc/PID/vm (per-region "user_accessible" flag.)

2019-12-15 20:11:57 +01:00

47 KiB

Raw Blame History

View Raw