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/mtd/Makefile | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 drivers/mtd/Makefile (limited to 'drivers/mtd/Makefile') diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile new file mode 100644 index 000000000..7b6dd53e8 --- /dev/null +++ b/drivers/mtd/Makefile @@ -0,0 +1,34 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the memory technology device drivers. +# + +# Core functionality. +obj-$(CONFIG_MTD) += mtd.o +mtd-y := mtdcore.o mtdsuper.o mtdconcat.o mtdpart.o mtdchar.o +mtd-$(CONFIG_MTD_VIRT_CONCAT) += mtd_virt_concat.o + +obj-y += parsers/ + +# 'Users' - code which presents functionality to userspace. +obj-$(CONFIG_MTD_BLKDEVS) += mtd_blkdevs.o +obj-$(CONFIG_MTD_BLOCK) += mtdblock.o +obj-$(CONFIG_MTD_BLOCK_RO) += mtdblock_ro.o +obj-$(CONFIG_FTL) += ftl.o +obj-$(CONFIG_NFTL) += nftl.o +obj-$(CONFIG_INFTL) += inftl.o +obj-$(CONFIG_RFD_FTL) += rfd_ftl.o +obj-$(CONFIG_SSFDC) += ssfdc.o +obj-$(CONFIG_SM_FTL) += sm_ftl.o +obj-$(CONFIG_MTD_OOPS) += mtdoops.o +obj-$(CONFIG_MTD_PSTORE) += mtdpstore.o +obj-$(CONFIG_MTD_SWAP) += mtdswap.o + +nftl-objs := nftlcore.o nftlmount.o +inftl-objs := inftlcore.o inftlmount.o + +obj-y += chips/ lpddr/ maps/ devices/ nand/ tests/ + +obj-$(CONFIG_MTD_SPI_NOR) += spi-nor/ +obj-$(CONFIG_MTD_UBI) += ubi/ +obj-$(CONFIG_MTD_HYPERBUS) += hyperbus/ -- cgit v1.3.1