From 6668ed271eaefaa63e686bdfbedaeb7b8e492722 Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi Date: Fri, 4 Sep 2026 10:43:19 +0200 Subject: selftests/bpf: Reject graph kptr use after RCU unlock Add a sleepable verifier test that loads a graph-node local kptr in an explicit RCU read-side critical section, then passes its node to bpf_rbtree_remove() after the section ends. Before the verifier fix, the stale NON_OWN_REF flag makes the node look like a live borrowed reference and the program is accepted. After the fix, the pointer is demoted without NON_OWN_REF and the graph kfunc argument is rejected. Also exercise a graph kptr loaded while a spin lock provides implicit RCU protection. The pointer must be invalidated when the lock is released, which guards the required ordering between non-owning-reference invalidation and RCU demotion. Update the existing fault-protected load test state description. The post-unlock pointer no longer carries NON_OWN_REF, but remains readable because the load is rewritten to use BPF_PROBE_MEM. Signed-off-by: Kumar Kartikeya Dwivedi Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com Signed-off-by: Alexei Starovoitov --- drivers/tee/Kconfig | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 drivers/tee/Kconfig (limited to 'drivers/tee/Kconfig') diff --git a/drivers/tee/Kconfig b/drivers/tee/Kconfig new file mode 100644 index 000000000..98c3ad083 --- /dev/null +++ b/drivers/tee/Kconfig @@ -0,0 +1,25 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Generic Trusted Execution Environment Configuration +menuconfig TEE + tristate "Trusted Execution Environment support" + depends on HAVE_ARM_SMCCC || COMPILE_TEST || CPU_SUP_AMD + select CRYPTO_LIB_SHA1 + select DMA_SHARED_BUFFER + select GENERIC_ALLOCATOR + help + This implements a generic interface towards a Trusted Execution + Environment (TEE). + +if TEE + +config TEE_DMABUF_HEAPS + bool + depends on HAS_DMA && DMABUF_HEAPS + default y + +source "drivers/tee/optee/Kconfig" +source "drivers/tee/amdtee/Kconfig" +source "drivers/tee/tstee/Kconfig" +source "drivers/tee/qcomtee/Kconfig" + +endif -- cgit v1.3.1