fergalmoran/ladybird
1
0
Fork 0
mirror of https://github.com/fergalmoran/ladybird.git synced 2026-01-03 07:07:23 +00:00
Code Issues Packages Projects Releases Wiki Activity

Kernel: Always observe the return value of Region::map and remap

Browse Source 
We have seen cases where the map fails, but we return the region
to the caller, causing them to page fault later on when they touch
the region.

The fix is to always observe the return code of map/remap.
This commit is contained in:
Brian Gianforcaro
2021-08-24 12:53:47 -07:00
committed by Andreas Kling
parent 0ae5de8c3c
commit 485f51690d
5 changed files with 28 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
Kernel/Memory/MemoryManager.cpp
View File

@@ -748,7 +748,8 @@ OwnPtr<Region> MemoryManager::allocate_kernel_region_with_vmobject(VirtualRange
return {};
auto region = maybe_region.release_value();
region->map(kernel_page_directory());
if (!region->map(kernel_page_directory()))
return {};
return region;
}