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/dma/ti/Makefile | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 drivers/dma/ti/Makefile (limited to 'drivers/dma/ti/Makefile') diff --git a/drivers/dma/ti/Makefile b/drivers/dma/ti/Makefile new file mode 100644 index 000000000..d376c117c --- /dev/null +++ b/drivers/dma/ti/Makefile @@ -0,0 +1,18 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_TI_CPPI41) += cppi41.o +obj-$(CONFIG_TI_EDMA) += edma.o +obj-$(CONFIG_DMA_OMAP) += omap-dma.o +obj-$(CONFIG_TI_K3_UDMA) += k3-udma.o +obj-$(CONFIG_TI_K3_UDMA_GLUE_LAYER) += k3-udma-glue.o +k3-psil-lib-objs := k3-psil.o \ + k3-psil-am654.o \ + k3-psil-j721e.o \ + k3-psil-j7200.o \ + k3-psil-am64.o \ + k3-psil-j721s2.o \ + k3-psil-am62.o \ + k3-psil-am62a.o \ + k3-psil-j784s4.o \ + k3-psil-am62p.o +obj-$(CONFIG_TI_K3_PSIL) += k3-psil-lib.o +obj-$(CONFIG_TI_DMA_CROSSBAR) += dma-crossbar.o -- cgit v1.3.1