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| author | Andreas Kling <awesomekling@gmail.com> | 2019-12-02 19:14:16 +0100 |
|---|---|---|
| committer | Andreas Kling <awesomekling@gmail.com> | 2019-12-02 19:18:52 +0100 |
| commit | f41ae755ecbe3a17140e53b1cf6f839da41d343b (patch) | |
| tree | 1838469cc90310088d5b09c095213519b52043c5 /Base | |
| parent | ddd54114724f5c2adefa2f4c5249c1af13295327 (diff) | |
| download | serenity-f41ae755ecbe3a17140e53b1cf6f839da41d343b.zip | |
Kernel: Crash on memory access in non-readable regions
This patch makes it possible to make memory regions non-readable.
This is enforced using the "present" bit in the page tables.
A process that hits an not-present page fault in a non-readable
region will be crashed.
Diffstat (limited to 'Base')
| -rw-r--r-- | Base/usr/share/man/man1/crash.md | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/Base/usr/share/man/man1/crash.md b/Base/usr/share/man/man1/crash.md index da38a466dd..8af17a8f07 100644 --- a/Base/usr/share/man/man1/crash.md +++ b/Base/usr/share/man/man1/crash.md @@ -28,6 +28,8 @@ kinds of crashes. * `-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. +* `-x`: Read from recently freed memory. (Tests an opportunistic malloc guard.) +* `-y`: Write to recently freed memory. (Tests an opportunistic malloc guard.) ## Examples |