android/SukiSU-Ultra
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

kernel: fix filp_open on older kernel's kworker (#205)

Browse Source 
On older kernel, kworker missing keyring from init process , and this
keyring is related to FBE , which causes filp_open return ENOKEY or
other errors.To fix this,just install init's keyring to per
kworkers.This works on Kernel 4.4 and 4.9.
This commit is contained in:
f19
2023-02-05 07:14:59 +08:00
committed by GitHub
parent cd33a6dd07
commit 0c322a33bc
5 changed files with 67 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
kernel/kernel_compat.h
View File

@@ -2,7 +2,41 @@
#define __KSU_H_KERNEL_COMPAT
#include "linux/fs.h"
#include "linux/key.h"
#include "linux/version.h"
extern ssize_t kernel_read_compat(struct file *p, void* buf, size_t count, loff_t *pos);
extern struct key *init_session_keyring;
extern ssize_t kernel_read_compat(struct file *p, void *buf, size_t count, loff_t *pos);
extern ssize_t kernel_write_compat(struct file *p, const void *buf, size_t count, loff_t *pos);
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
static inline int install_session_keyring(struct key *keyring)
{
struct cred *new;
int ret;
new = prepare_creds();
if (!new)
return -ENOMEM;
ret = install_session_keyring_to_cred(new, keyring);
if (ret < 0) {
abort_creds(new);
return ret;
}
return commit_creds(new);
}
#define KWORKER_INSTALL_KEYRING() \
static bool keyring_installed = false; \
if (init_session_keyring != NULL && !keyring_installed) \
{ \
install_session_keyring(init_session_keyring); \
keyring_installed = true; \
}
#else
#define KWORKER_INSTALL_KEYRING()
#endif
#endif