mirror of
https://github.com/torvalds/linux.git
synced 2026-10-25 01:05:03 +02:00
2776e9c285
ipe_bdev_setintegrity() frees the old root hash when dm-verity publishes
a new one on ->preresume, while policy evaluation can still be
dereferencing it.
Protect the root hash with RCU. The evaluation path already runs under
rcu_read_lock().
Fixes: e155858dd9 ("ipe: add support for dm-verity as a trust provider")
Cc: stable@vger.kernel.org
Assisted-by: LLM
[FW: remove model name according to latest guideline]
Signed-off-by: Fan Wu <wufan@kernel.org>
71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2020-2024 Microsoft Corporation. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _IPE_EVAL_H
|
|
#define _IPE_EVAL_H
|
|
|
|
#include <linux/file.h>
|
|
#include <linux/types.h>
|
|
|
|
#include "policy.h"
|
|
#include "hooks.h"
|
|
|
|
#define IPE_EVAL_CTX_INIT ((struct ipe_eval_ctx){ 0 })
|
|
|
|
extern struct ipe_policy __rcu *ipe_active_policy;
|
|
extern bool success_audit;
|
|
extern bool enforce;
|
|
|
|
struct ipe_superblock {
|
|
bool initramfs;
|
|
};
|
|
|
|
#ifdef CONFIG_IPE_PROP_DM_VERITY
|
|
struct ipe_bdev {
|
|
#ifdef CONFIG_IPE_PROP_DM_VERITY_SIGNATURE
|
|
bool dm_verity_signed;
|
|
#endif /* CONFIG_IPE_PROP_DM_VERITY_SIGNATURE */
|
|
struct digest_info __rcu *root_hash;
|
|
};
|
|
#endif /* CONFIG_IPE_PROP_DM_VERITY */
|
|
|
|
#ifdef CONFIG_IPE_PROP_FS_VERITY_BUILTIN_SIG
|
|
struct ipe_inode {
|
|
bool fs_verity_signed;
|
|
};
|
|
#endif /* CONFIG_IPE_PROP_FS_VERITY_BUILTIN_SIG */
|
|
|
|
struct ipe_eval_ctx {
|
|
enum ipe_op_type op;
|
|
enum ipe_hook_type hook;
|
|
|
|
const struct file *file;
|
|
bool initramfs;
|
|
#ifdef CONFIG_IPE_PROP_DM_VERITY
|
|
const struct ipe_bdev *ipe_bdev;
|
|
#endif /* CONFIG_IPE_PROP_DM_VERITY */
|
|
#ifdef CONFIG_IPE_PROP_FS_VERITY
|
|
const struct inode *ino;
|
|
#endif /* CONFIG_IPE_PROP_FS_VERITY */
|
|
#ifdef CONFIG_IPE_PROP_FS_VERITY_BUILTIN_SIG
|
|
const struct ipe_inode *ipe_inode;
|
|
#endif /* CONFIG_IPE_PROP_FS_VERITY_BUILTIN_SIG */
|
|
};
|
|
|
|
enum ipe_match {
|
|
IPE_MATCH_RULE = 0,
|
|
IPE_MATCH_TABLE,
|
|
IPE_MATCH_GLOBAL,
|
|
__IPE_MATCH_MAX
|
|
};
|
|
|
|
void ipe_build_eval_ctx(struct ipe_eval_ctx *ctx,
|
|
const struct file *file,
|
|
enum ipe_op_type op,
|
|
enum ipe_hook_type hook);
|
|
int ipe_evaluate_event(const struct ipe_eval_ctx *const ctx);
|
|
|
|
#endif /* _IPE_EVAL_H */
|