v2 security: Propagate caller information in bpf hooks #8585
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Certain bpf syscall subcommands are available for usage from both userspace and the kernel. LSM modules or eBPF gatekeeper programs may need to take a different course of action depending on whether or not a BPF syscall originated from the kernel or userspace. Additionally, some of the bpf_attr struct fields contain pointers to arbitrary memory. Currently the functionality to determine whether or not a pointer refers to kernel memory or userspace memory is exposed to the bpf verifier, but that information is missing from various LSM hooks. Here we augment the LSM hooks to provide this data, by simply passing a boolean flag indicating whether or not the call originated in the kernel, in any hook that contains a bpf_attr struct that corresponds to a subcommand that may be called from the kernel. Signed-off-by: Blaise Boscaccy <[email protected]>
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Upstream branch: 0b93631 |
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=939085 expired. Closing PR. |
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Pull request for series with
subject: v2 security: Propagate caller information in bpf hooks
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=939085