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Kernel: Get RefPtr<Device> from the DeviceManagement::get_device method

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Instead of returning a raw pointer, which could be technically invalid
when using it in the caller function, we return a valid RefPtr of such
device.

This ensures that the code in DevPtsFS is now safe from a rare race
condition in which the SlavePTY device is gone but we still have a
pointer to it.
This commit is contained in:
Liav A 2024-03-04 21:19:31 +02:00 • committed by Andrew Kaster
parent 5dcf03ad9a
commit 11ead5c84f
6 changed files with 24 additions and 16 deletions
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2
Kernel/Devices/DeviceManagement.h
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@ -41,7 +41,7 @@ public:
void for_each(Function<void(Device&)>);
ErrorOr<void> try_for_each(Function<ErrorOr<void>(Device&)>);
Device* get_device(MajorNumber major, MinorNumber minor);
RefPtr<Device> get_device(MajorNumber major, MinorNumber minor);
NullDevice const& null_device() const;
NullDevice& null_device();