Crowdstrike, Inc.

Martin Kelly

Marco Vedovati

Milos Petrbok

Christopher White

Igor Polevoy

The present disclosure provides techniques for context-sensitive token-bucket rate limiting. A processing device obtains, in a kernel space of an operating system (OS), a message comprising a unique process identifier (UPID) and a message type. The processing device determines whether to send the message from the kernel space to a user space of the OS based on at least one of: the UPID, the message type, or a token count and a discrete time unit in an entry in a data structure in the kernel space. The processing device processes the message based on the determination of whether to send the message from the kernel space to the user space.

Context-sensitive token-bucket rate limiting in eBPF

A method of generating a file hash using mount namespace data includes identifying, by a user space monitoring application executing in a user space of an operating system, a target application file associated with a target application process executing in the user space of the operating system, wherein the target application process is associated with a first mount namespace, accessing, by the user space monitoring application, a mapping between the first mount namespace and one or more processes executing in the user space of the operating system, switching, by a processing device, the user space monitoring application to the first mount namespace based on the mapping, and accessing, by the user space monitoring application, the target application file in the first mount namespace.

Namespace mapping to support file hash generation

A method includes retrieving, in a kernel space of an operating system executing on a computing device, a first value from a first clock source, retrieving, in a user space of the operating system executing on the computing device, a second value from a second clock source, generating a unique process identifier (UPID) associated with a process identifier (PID) of a process executing in the operating system, wherein the UPID is based on the first value of the first clock source and the second value of the second clock source, and tracking process activity of the process executing in the operating system by utilizing the UPID.

Techniques for generating unique identifiers for tracking process activity

A first message structure is selected from a first subset of a plurality of message structures based on a size of a message payload and a message type of the message payload. Each of the first subset of the plurality of message structures has a different size. A size of the first message structure is greater than or equal to the size of the message payload. A first request is transmitted to an application programming interface (API) utilizing the size of the first message structure. In response to transmitting the first request to the API, a reference is received to a buffer structure. The message payload is copied into the buffer structure using the reference to the buffer structure.

Growing community of inventors

Bothell, WA, United States of America

Martin Kelly