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kernel: handle optional backport for selinux_inode

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* For supporting kernel 4.19 with 5.10 bpf backports.

Co-authored-by: rsuntk <rsuntk@yukiprjkt.my.id>
This commit is contained in:
ShirkNeko
2025-09-12 14:37:39 +08:00
parent 840f7a0ff2
commit eebde9be16
9 changed files with 429 additions and 432 deletions
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34
kernel/kernel_compat.h
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@@ -4,30 +4,9 @@
#include <linux/fs.h>
#include <linux/version.h>
#include <linux/cred.h>
#include <linux/list.h>
#include "ss/policydb.h"
#include "linux/key.h"
// for kernel without get_cred_rcu
#ifndef KSU_COMPAT_HAS_GET_CRED_RCU
static inline const struct cred *get_cred_rcu(const struct cred *cred)
{
struct cred *nonconst_cred = (struct cred *) cred;
if (!cred)
return NULL;
#ifdef KSU_COMPAT_ATOMIC_LONG
if (!atomic_long_inc_not_zero(&nonconst_cred->usage))
#else
if (!atomic_inc_not_zero(&nonconst_cred->usage))
#endif
return NULL;
validate_creds(cred);
#ifdef KSU_COMPAT_HAS_NONCONST_CRED
nonconst_cred->non_rcu = 0;
#endif
return cred;
}
#endif
#include <linux/list.h>
/**
* list_count_nodes - count the number of nodes in a list
@@ -82,8 +61,13 @@ static inline __maybe_unused size_t list_count_nodes(const struct list_head *hea
extern long ksu_strncpy_from_user_nofault(char *dst,
const void __user *unsafe_addr,
long count);
extern long ksu_strncpy_from_user_retry(char *dst,
const void __user *unsafe_addr,
long count);
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0) || defined(CONFIG_IS_HW_HISI) || defined(CONFIG_KSU_ALLOWLIST_WORKAROUND)
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0) || \
defined(CONFIG_IS_HW_HISI) || \
defined(CONFIG_KSU_ALLOWLIST_WORKAROUND)
extern struct key *init_session_keyring;
#endif
@@ -96,9 +80,9 @@ extern ssize_t ksu_kernel_write_compat(struct file *p, const void *buf,
size_t count, loff_t *pos);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 0)
#define ksu_access_ok(addr, size) (access_ok(addr, size))
#define ksu_access_ok(addr, size) access_ok(addr, size)
#else
#define ksu_access_ok(addr, size) (access_ok(VERIFY_READ, addr, size))
#define ksu_access_ok(addr, size) access_ok(VERIFY_READ, addr, size)
#endif
#endif