From fc611f47f2188ade2b48ff6902d5cce8baac0c58 Mon Sep 17 00:00:00 2001 From: KP Singh Date: Sun, 29 Mar 2020 01:43:49 +0100 Subject: bpf: Introduce BPF_PROG_TYPE_LSM Introduce types and configs for bpf programs that can be attached to LSM hooks. The programs can be enabled by the config option CONFIG_BPF_LSM. Signed-off-by: KP Singh Signed-off-by: Daniel Borkmann Reviewed-by: Brendan Jackman Reviewed-by: Florent Revest Reviewed-by: Thomas Garnier Acked-by: Yonghong Song Acked-by: Andrii Nakryiko Acked-by: James Morris Link: https://lore.kernel.org/bpf/20200329004356.27286-2-kpsingh@chromium.org --- init/Kconfig | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'init/Kconfig') diff --git a/init/Kconfig b/init/Kconfig index 20a6ac33761c..deae572d1927 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1616,6 +1616,18 @@ config KALLSYMS_BASE_RELATIVE # end of the "standard kernel features (expert users)" menu # syscall, maps, verifier + +config BPF_LSM + bool "LSM Instrumentation with BPF" + depends on BPF_SYSCALL + depends on SECURITY + depends on BPF_JIT + help + Enables instrumentation of the security hooks with eBPF programs for + implementing dynamic MAC and Audit Policies. + + If you are unsure how to answer this question, answer N. + config BPF_SYSCALL bool "Enable bpf() system call" select BPF -- cgit v1.2.3 From 4edf16b72c57bb0faad5da143f812384df0c43f6 Mon Sep 17 00:00:00 2001 From: KP Singh Date: Mon, 30 Mar 2020 22:40:59 +0200 Subject: bpf, lsm: Make BPF_LSM depend on BPF_EVENTS LSM and tracing programs share their helpers with bpf_tracing_func_proto which is only defined (in bpf_trace.c) when BPF_EVENTS is enabled. Instead of adding __weak symbol, make BPF_LSM depend on BPF_EVENTS so that both tracing and LSM programs can actually share helpers. Fixes: fc611f47f218 ("bpf: Introduce BPF_PROG_TYPE_LSM") Reported-by: Randy Dunlap Signed-off-by: KP Singh Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20200330204059.13024-1-kpsingh@chromium.org --- init/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'init/Kconfig') diff --git a/init/Kconfig b/init/Kconfig index deae572d1927..7b7ea70e64ac 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1619,6 +1619,7 @@ config KALLSYMS_BASE_RELATIVE config BPF_LSM bool "LSM Instrumentation with BPF" + depends on BPF_EVENTS depends on BPF_SYSCALL depends on SECURITY depends on BPF_JIT -- cgit v1.2.3