From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- security/yama/Kconfig | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 security/yama/Kconfig (limited to 'security/yama/Kconfig') diff --git a/security/yama/Kconfig b/security/yama/Kconfig new file mode 100644 index 000000000..a81030412 --- /dev/null +++ b/security/yama/Kconfig @@ -0,0 +1,14 @@ +# SPDX-License-Identifier: GPL-2.0-only +config SECURITY_YAMA + bool "Yama support" + depends on SECURITY + default n + help + This selects Yama, which extends DAC support with additional + system-wide security settings beyond regular Linux discretionary + access controls. Currently available is ptrace scope restriction. + Like capabilities, this security module stacks with other LSMs. + Further information can be found in + Documentation/admin-guide/LSM/Yama.rst. + + If you are unsure how to answer this question, answer N. -- cgit v1.3.1