From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- fs/overlayfs/params.h | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 fs/overlayfs/params.h (limited to 'fs/overlayfs/params.h') diff --git a/fs/overlayfs/params.h b/fs/overlayfs/params.h new file mode 100644 index 000000000..ffd53cdd8 --- /dev/null +++ b/fs/overlayfs/params.h @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include +#include + +struct ovl_fs; +struct ovl_config; + +extern const struct fs_parameter_spec ovl_parameter_spec[]; +extern const struct constant_table ovl_parameter_redirect_dir[]; + +/* The set of options that user requested explicitly via mount options */ +struct ovl_opt_set { + bool metacopy; + bool redirect; + bool nfs_export; + bool index; +}; + +#define OVL_MAX_STACK 500 + +struct ovl_fs_context_layer { + char *name; + struct path path; +}; + +struct ovl_fs_context { + struct path upper; + struct path work; + size_t capacity; + size_t nr; /* includes nr_data */ + size_t nr_data; + struct ovl_opt_set set; + struct ovl_fs_context_layer *lower; + char *lowerdir_all; /* user provided lowerdir string */ + bool casefold_set; +}; + +int ovl_init_fs_context(struct fs_context *fc); +void ovl_free_fs(struct ovl_fs *ofs); +int ovl_fs_params_verify(const struct ovl_fs_context *ctx, + struct ovl_config *config); +int ovl_show_options(struct seq_file *m, struct dentry *dentry); +const char *ovl_xino_mode(struct ovl_config *config); -- cgit v1.3.1