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 --- fs/nfs/Makefile | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 fs/nfs/Makefile (limited to 'fs/nfs/Makefile') diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile new file mode 100644 index 000000000..c895521f2 --- /dev/null +++ b/fs/nfs/Makefile @@ -0,0 +1,38 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the Linux nfs filesystem routines. +# + +obj-$(CONFIG_NFS_FS) += nfs.o + +CFLAGS_nfstrace.o += -I$(src) +nfs-y := client.o dir.o file.o getroot.o inode.o super.o \ + io.o direct.o pagelist.o read.o symlink.o unlink.o \ + write.o namespace.o mount_clnt.o nfstrace.o \ + export.o sysfs.o fs_context.o +nfs-$(CONFIG_ROOT_NFS) += nfsroot.o +nfs-$(CONFIG_SYSCTL) += sysctl.o +nfs-$(CONFIG_NFS_FSCACHE) += fscache.o +nfs-$(CONFIG_NFS_LOCALIO) += localio.o + +obj-$(CONFIG_NFS_V2) += nfsv2.o +nfsv2-y := nfs2super.o proc.o nfs2xdr.o + +obj-$(CONFIG_NFS_V3) += nfsv3.o +nfsv3-y := nfs3super.o nfs3client.o nfs3proc.o nfs3xdr.o +nfsv3-$(CONFIG_NFS_V3_ACL) += nfs3acl.o + +obj-$(CONFIG_NFS_V4) += nfsv4.o +CFLAGS_nfs4trace.o += -I$(src) +nfsv4-y := nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o nfs4super.o nfs4file.o \ + delegation.o nfs4idmap.o callback.o callback_xdr.o callback_proc.o \ + nfs4namespace.o nfs4getroot.o nfs4client.o nfs4session.o \ + dns_resolve.o nfs4trace.o pnfs.o pnfs_dev.o pnfs_nfs.o +nfsv4-$(CONFIG_NFS_USE_LEGACY_DNS) += cache_lib.o +nfsv4-$(CONFIG_SYSCTL) += nfs4sysctl.o +nfsv4-$(CONFIG_NFS_V4_0) += nfs40client.o nfs40proc.o +nfsv4-$(CONFIG_NFS_V4_2) += nfs42proc.o nfs42xattr.o + +obj-$(CONFIG_PNFS_FILE_LAYOUT) += filelayout/ +obj-$(CONFIG_PNFS_BLOCK) += blocklayout/ +obj-$(CONFIG_PNFS_FLEXFILE_LAYOUT) += flexfilelayout/ -- cgit v1.3.1