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bpf: add small subset of SECURITY_PATH hooks to BPF sleepable_lsm_hooks list
security_path_* based LSM hooks appear to be generally missing from the sleepable_lsm_hooks list. Initially add a small subset of them to the preexisting sleepable_lsm_hooks list so that sleepable BPF helpers like bpf_d_path() can be used from sleepable BPF LSM based programs. The security_path_* hooks added in this patch are similar to the security_inode_* counterparts that already exist in the sleepable_lsm_hooks list, and are called in roughly similar points and contexts. Presumably, making them OK to be also annotated as sleepable. Building a kernel with DEBUG_ATOMIC_SLEEP options enabled and running reasonable workloads stimulating activity that would be intercepted by such security hooks didn't show any splats. Notably, I haven't added all the security_path_* LSM hooks that are available as I don't need them at this point in time. Signed-off-by: Matt Bobrowski <mattbobrowski@google.com> Acked-by: KP Singh <kpsingh@kernel.org> Link: https://lore.kernel.org/r/ZXM3IHHXpNY9y82a@google.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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@ -304,6 +304,18 @@ BTF_ID(func, bpf_lsm_kernel_module_request)
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BTF_ID(func, bpf_lsm_kernel_read_file)
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BTF_ID(func, bpf_lsm_kernfs_init_security)
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#ifdef CONFIG_SECURITY_PATH
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BTF_ID(func, bpf_lsm_path_unlink)
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BTF_ID(func, bpf_lsm_path_mkdir)
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BTF_ID(func, bpf_lsm_path_rmdir)
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BTF_ID(func, bpf_lsm_path_truncate)
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BTF_ID(func, bpf_lsm_path_symlink)
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BTF_ID(func, bpf_lsm_path_link)
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BTF_ID(func, bpf_lsm_path_rename)
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BTF_ID(func, bpf_lsm_path_chmod)
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BTF_ID(func, bpf_lsm_path_chown)
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#endif /* CONFIG_SECURITY_PATH */
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#ifdef CONFIG_KEYS
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BTF_ID(func, bpf_lsm_key_free)
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#endif /* CONFIG_KEYS */
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