diff options
| author | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2026-09-04 10:43:19 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-09-04 07:58:36 -0700 |
| commit | 6668ed271eaefaa63e686bdfbedaeb7b8e492722 (patch) | |
| tree | 58e8288fead484f6755ad0815fc74c3742663761 /fs/jfs/jfs_inode.h | |
| download | linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.tar.gz linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.zip | |
selftests/bpf: Reject graph kptr use after RCU unlockgrafted
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 <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'fs/jfs/jfs_inode.h')
| -rw-r--r-- | fs/jfs/jfs_inode.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/fs/jfs/jfs_inode.h b/fs/jfs/jfs_inode.h new file mode 100644 index 000000000..2c6c81c8c --- /dev/null +++ b/fs/jfs/jfs_inode.h @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) International Business Machines Corp., 2000-2001 + */ +#ifndef _H_JFS_INODE +#define _H_JFS_INODE + +struct fid; + +extern struct inode *ialloc(struct inode *, umode_t); +extern int jfs_fsync(struct file *, loff_t, loff_t, int); +extern int jfs_fileattr_get(struct dentry *dentry, struct file_kattr *fa); +extern int jfs_fileattr_set(struct mnt_idmap *idmap, + struct dentry *dentry, struct file_kattr *fa); +extern long jfs_ioctl(struct file *, unsigned int, unsigned long); +extern struct inode *jfs_iget(struct super_block *, unsigned long); +extern int jfs_commit_inode(struct inode *, int); +extern int jfs_write_inode(struct inode *, struct writeback_control *); +extern void jfs_evict_inode(struct inode *); +extern void jfs_dirty_inode(struct inode *, int); +extern void jfs_truncate(struct inode *); +extern void jfs_truncate_nolock(struct inode *, loff_t); +extern void jfs_free_zero_link(struct inode *); +extern struct dentry *jfs_get_parent(struct dentry *dentry); +extern struct dentry *jfs_fh_to_dentry(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type); +extern struct dentry *jfs_fh_to_parent(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type); +extern void jfs_set_inode_flags(struct inode *); +extern int jfs_get_block(struct inode *, sector_t, struct buffer_head *, int); +extern int jfs_setattr(struct mnt_idmap *, struct dentry *, struct iattr *); + +extern const struct address_space_operations jfs_aops; +extern const struct inode_operations jfs_dir_inode_operations; +extern const struct file_operations jfs_dir_operations; +extern const struct inode_operations jfs_file_inode_operations; +extern const struct file_operations jfs_file_operations; +extern const struct inode_operations jfs_symlink_inode_operations; +extern const struct inode_operations jfs_fast_symlink_inode_operations; +extern const struct dentry_operations jfs_ci_dentry_operations; +#endif /* _H_JFS_INODE */ |