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Kernel/Storage: Properly free unused NVMeIO AsyncBlockDeviceRequest
This was the root cause of zombie processes showing up randomly and disappearing after some disk activity, such as running shell commands - The NVMeIO AsyncBlockDeviceRequest member simply held a pointer to a Process object, therefore it could keep it alive a for a long time after it ceased to actually function at all.
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3 changed files with 9 additions and 3 deletions
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@ -57,7 +57,7 @@ void NVMeInterruptQueue::complete_current_request(u16 cmdid, u16 status)
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request_pdu.request->complete(req_result);
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if (request_pdu.end_io_handler)
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request_pdu.end_io_handler(status);
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request_pdu.used = false;
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request_pdu.clear();
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};
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// There can be submission without any request associated with it such as with
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@ -87,7 +87,7 @@ void NVMeInterruptQueue::complete_current_request(u16 cmdid, u16 status)
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current_request->complete(AsyncDeviceRequest::OutOfMemory);
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if (request_pdu.end_io_handler)
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request_pdu.end_io_handler(status);
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request_pdu.used = false;
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request_pdu.clear();
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}
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}
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}
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@ -42,7 +42,7 @@ void NVMePollQueue::complete_current_request(u16 cmdid, u16 status)
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request_pdu.request->complete(req_result);
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if (request_pdu.end_io_handler)
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request_pdu.end_io_handler(status);
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request_pdu.used = false;
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request_pdu.clear();
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};
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// There can be submission without any request associated with it such as with
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@ -34,6 +34,12 @@ enum class QueueType {
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class AsyncBlockDeviceRequest;
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struct NVMeIO {
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void clear()
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{
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used = false;
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request = nullptr;
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end_io_handler = nullptr;
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}
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RefPtr<AsyncBlockDeviceRequest> request;
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bool used = false;
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Function<void(u16 status)> end_io_handler;
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