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Kernel: Disallow syscalls from writeable memory

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Processes will now crash with SIGSEGV if they attempt making a syscall
from PROT_WRITE memory.

This neat idea comes from OpenBSD. :^)
This commit is contained in:
Andreas Kling 2019-11-29 16:15:30 +01:00
parent ea52fe528a
commit e56daf547c
5 changed files with 27 additions and 5 deletions
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Base/usr/share/man/man1/crash.md
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@ -27,6 +27,7 @@ kinds of crashes.
* `-r`: Write to read-only memory.
* `-T`: Make a syscall while using an invalid stack pointer.
* `-t`: Trigger a page fault while using an invalid stack pointer.
* `-S`: Make a syscall from writeable memory.
## Examples