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Kernel: Make Process a Weakable class.

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Use this to fix a use-after-free in ~GraphicsBitmap(). We'd hit this when
the WindowServer was doing a deferred destruction of a WSWindow whose
backing store referred to a now-reaped Process.
This commit is contained in:
Andreas Kling
2019-01-31 07:02:40 +01:00
parent fc0b63ca3c
commit 2dc9c86bad
3 changed files with 5 additions and 4 deletions
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3
Kernel/Process.h
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@@ -12,6 +12,7 @@
#include <AK/AKString.h>
#include <AK/Vector.h>
#include <AK/WeakPtr.h>
#include <AK/Weakable.h>
#include <AK/Lock.h>
class FileDescriptor;
@@ -45,7 +46,7 @@ struct DisplayInfo {
byte* framebuffer;
};
class Process : public InlineLinkedListNode<Process> {
class Process : public InlineLinkedListNode<Process>, public Weakable<Process> {
friend class InlineLinkedListNode<Process>;
friend class WSWindowManager; // FIXME: Make a better API for allocate_region().
friend class GraphicsBitmap; // FIXME: Make a better API for allocate_region().