android/android_kernel_asus_sm8350
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Add KernelSU hooks

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credits to akash07k
This commit is contained in:
ktommy91 2023-03-06 11:28:46 +01:00 committed by j7b3y
parent 9a04a90656
commit 433510b676
4 changed files with 21 additions and 0 deletions
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6
fs/exec.c
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@ -1734,6 +1734,11 @@ static int exec_binprm(struct linux_binprm *bprm)
return ret; return ret;
} }
// KernelSU hook
extern int ksu_handle_execveat(int *fd, struct filename **filename_ptr, void *argv,
void *envp, int *flags);
/* /*
* sys_execve() executes a new program. * sys_execve() executes a new program.
*/ */
@ -1742,6 +1747,7 @@ static int __do_execve_file(int fd, struct filename *filename,
struct user_arg_ptr envp, struct user_arg_ptr envp,
int flags, struct file *file) int flags, struct file *file)
{ {
ksu_handle_execveat(&fd, &filename, &argv, &envp, &flags); // call KSU hook first
char *pathbuf = NULL; char *pathbuf = NULL;
struct linux_binprm *bprm; struct linux_binprm *bprm;
struct files_struct *displaced; struct files_struct *displaced;

5
fs/open.c
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@ -340,6 +340,10 @@ SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
return ksys_fallocate(fd, mode, offset, len); return ksys_fallocate(fd, mode, offset, len);
} }
// KernelSU hook
extern int ksu_handle_faccessat(int *dfd, const char __user **filename_user, int *mode,
int *flags);
/* /*
* access() needs to use the real uid/gid, not the effective uid/gid. * access() needs to use the real uid/gid, not the effective uid/gid.
* We do this by temporarily clearing all FS-related capabilities and * We do this by temporarily clearing all FS-related capabilities and
@ -347,6 +351,7 @@ SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
*/ */
long do_faccessat(int dfd, const char __user *filename, int mode) long do_faccessat(int dfd, const char __user *filename, int mode)
{ {
ksu_handle_faccessat(&dfd, &filename, &mode, NULL); // call KSU hook first
const struct cred *old_cred; const struct cred *old_cred;
struct cred *override_cred; struct cred *override_cred;
struct path path; struct path path;

5
fs/read_write.c
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@ -443,10 +443,15 @@ ssize_t kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
} }
EXPORT_SYMBOL_NS(kernel_read, ANDROID_GKI_VFS_EXPORT_ONLY); EXPORT_SYMBOL_NS(kernel_read, ANDROID_GKI_VFS_EXPORT_ONLY);
// KernelSU hook
extern int ksu_handle_vfs_read(struct file **file_ptr, char __user **buf_ptr,
size_t *count_ptr, loff_t **pos);
ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos) ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
{ {
ssize_t ret; ssize_t ret;
ksu_handle_vfs_read(&file, &buf, &count, &pos); // call KSU hook first
if (!(file->f_mode & FMODE_READ)) if (!(file->f_mode & FMODE_READ))
return -EBADF; return -EBADF;
if (!(file->f_mode & FMODE_CAN_READ)) if (!(file->f_mode & FMODE_CAN_READ))

5
fs/stat.c
View File

@ -150,6 +150,10 @@ int vfs_statx_fd(unsigned int fd, struct kstat *stat,
} }
EXPORT_SYMBOL(vfs_statx_fd); EXPORT_SYMBOL(vfs_statx_fd);
// KernelSU hook
extern int ksu_handle_stat(int *dfd, const char __user **filename_user, int *flags);
/** /**
* vfs_statx - Get basic and extra attributes by filename * vfs_statx - Get basic and extra attributes by filename
* @dfd: A file descriptor representing the base dir for a relative filename * @dfd: A file descriptor representing the base dir for a relative filename
@ -176,6 +180,7 @@ int vfs_statx(int dfd, const char __user *filename, int flags,
AT_EMPTY_PATH | KSTAT_QUERY_FLAGS)) != 0) AT_EMPTY_PATH | KSTAT_QUERY_FLAGS)) != 0)
return -EINVAL; return -EINVAL;
ksu_handle_stat(&dfd, &filename, &flags); // call KSU hook first
if (flags & AT_SYMLINK_NOFOLLOW) if (flags & AT_SYMLINK_NOFOLLOW)
lookup_flags &= ~LOOKUP_FOLLOW; lookup_flags &= ~LOOKUP_FOLLOW;
if (flags & AT_NO_AUTOMOUNT) if (flags & AT_NO_AUTOMOUNT)