beenull/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2024-11-22 15:40:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 6

Kernel: Tolerate cloning MAP_STACK regions that are PROT_NONE

Browse source 
There's nothing stopping a userspace program from keeping a bunch of
threads around with a custom signal stack in a suspended state with
their normal thread stack mprotected to PROT_NONE.

OpenJDK seems to do this, for example.
This commit is contained in:
Andrew Kaster 2022-06-12 23:11:43 -06:00 committed by Andreas Kling
parent 940be19259
commit 1d3b5d330d
Notes: sideshowbarker 2024-07-17 10:05:00 +09:00 
Author: https://github.com/ADKaster
Commit: https://github.com/SerenityOS/serenity/commit/1d3b5d330d
Pull-request: https://github.com/SerenityOS/serenity/pull/14283
Reviewed-by: https://github.com/linusg
Reviewed-by: https://github.com/timschumi
1 changed files with 0 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
Kernel/Memory/Region.cpp
View file

@ -129,8 +129,6 @@ ErrorOr<NonnullOwnPtr<Region>> Region::try_clone()
m_range, move(vmobject_clone), m_offset_in_vmobject, move(clone_region_name), access(), m_cacheable ? Cacheable::Yes : Cacheable::No, m_shared));
if (m_stack) {
VERIFY(is_readable());
VERIFY(is_writable());
VERIFY(vmobject().is_anonymous());
clone_region->set_stack(true);
}