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/parsers/Makefile | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 drivers/mtd/parsers/Makefile (limited to 'drivers/mtd/parsers/Makefile') diff --git a/drivers/mtd/parsers/Makefile b/drivers/mtd/parsers/Makefile new file mode 100644 index 000000000..9b00c62b8 --- /dev/null +++ b/drivers/mtd/parsers/Makefile @@ -0,0 +1,17 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_MTD_BCM47XX_PARTS) += bcm47xxpart.o +obj-$(CONFIG_MTD_BCM63XX_PARTS) += bcm63xxpart.o +obj-$(CONFIG_MTD_BRCM_U_BOOT) += brcm_u-boot.o +obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdlinepart.o +obj-$(CONFIG_MTD_OF_PARTS) += ofpart.o +ofpart-y += ofpart_core.o +ofpart-$(CONFIG_MTD_OF_PARTS_BCM4908) += ofpart_bcm4908.o +ofpart-$(CONFIG_MTD_OF_PARTS_LINKSYS_NS)+= ofpart_linksys_ns.o +obj-$(CONFIG_MTD_PARSER_IMAGETAG) += parser_imagetag.o +obj-$(CONFIG_MTD_AFS_PARTS) += afs.o +obj-$(CONFIG_MTD_PARSER_TPLINK_SAFELOADER) += tplink_safeloader.o +obj-$(CONFIG_MTD_PARSER_TRX) += parser_trx.o +obj-$(CONFIG_MTD_SERCOMM_PARTS) += scpart.o +obj-$(CONFIG_MTD_SHARPSL_PARTS) += sharpslpart.o +obj-$(CONFIG_MTD_REDBOOT_PARTS) += redboot.o +obj-$(CONFIG_MTD_QCOMSMEM_PARTS) += qcomsmempart.o -- cgit v1.3.1