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/ocfs2/acl.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 fs/ocfs2/acl.h (limited to 'fs/ocfs2/acl.h') diff --git a/fs/ocfs2/acl.h b/fs/ocfs2/acl.h new file mode 100644 index 000000000..667c6f03f --- /dev/null +++ b/fs/ocfs2/acl.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * acl.h + * + * Copyright (C) 2004, 2008 Oracle. All rights reserved. + */ + +#ifndef OCFS2_ACL_H +#define OCFS2_ACL_H + +#include + +struct ocfs2_acl_entry { + __le16 e_tag; + __le16 e_perm; + __le32 e_id; +}; + +struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type, bool rcu); +int ocfs2_iop_set_acl(struct mnt_idmap *idmap, struct dentry *dentry, + struct posix_acl *acl, int type); +extern int ocfs2_acl_chmod(struct inode *, struct buffer_head *); +extern int ocfs2_init_acl(handle_t *, struct inode *, struct inode *, + struct buffer_head *, struct buffer_head *, + struct ocfs2_alloc_context *, + struct ocfs2_alloc_context *); + +#endif /* OCFS2_ACL_H */ -- cgit v1.3.1