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kernel, ksud: clean headers and add fd wrapper for devpts (#193)

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* Now Official KernelSU devpts compat is questionable
Squashed commits:
4893fad235
e7c3d4a6a6
4bb2dae3f5

Signed-off-by: Faris <rissu.ntk@gmail.com>
Co-authored-by: 5ec1cff <56485584+5ec1cff@users.noreply.github.com>
Co-authored-by: weishu <twsxtd@gmail.com>
Co-authored-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
This commit is contained in:
Faris
2025-11-07 20:12:12 +07:00
committed by ShirkNeko
parent 968c3f7d57
commit 29c6e2dbcc
19 changed files with 700 additions and 272 deletions
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75
kernel/supercalls.c
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@@ -17,6 +17,9 @@
#include "manager.h"
#include "sulog.h"
#include "selinux/selinux.h"
#include "core_hook.h"
#include "objsec.h"
#include "file_wrapper.h"
#include "kernel_compat.h"
#include "throne_comm.h"
#include "dynamic_manager.h"
@@ -385,7 +388,7 @@ static int do_get_hook_type(void __user *arg)
#if defined(CONFIG_KSU_TRACEPOINT_HOOK)
type = "Tracepoint";
#elif defined(CONFIG_KSU_MANUAL_HOOK)
#elif defined(KSU_MANUAL_HOOK)
type = "Manual";
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 13, 0)
@@ -516,6 +519,73 @@ static int do_enable_uid_scanner(void __user *arg)
return 0;
}
static int do_get_wrapper_fd(void __user *arg)
{
if (!ksu_file_sid) {
return -1;
}
struct ksu_get_wrapper_fd_cmd cmd;
int ret;
if (copy_from_user(&cmd, arg, sizeof(cmd))) {
pr_err("get_wrapper_fd: copy_from_user failed\n");
return -EFAULT;
}
struct file *f = fget(cmd.fd);
if (!f) {
return -EBADF;
}
struct ksu_file_wrapper *data = mksu_create_file_wrapper(f);
if (data == NULL) {
ret = -ENOMEM;
goto put_orig_file;
}
struct file *pf = anon_inode_getfile("[mksu_fdwrapper]", &data->ops,
data, f->f_flags);
if (IS_ERR(pf)) {
ret = PTR_ERR(pf);
pr_err("mksu_fdwrapper: anon_inode_getfile failed: %ld\n",
PTR_ERR(pf));
goto put_wrapper_data;
}
struct inode *wrapper_inode = file_inode(pf);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 1, 0) || \
defined(KSU_OPTIONAL_SELINUX_INODE)
struct inode_security_struct *sec = selinux_inode(wrapper_inode);
#else
struct inode_security_struct *sec =
(struct inode_security_struct *)wrapper_inode->i_security;
#endif
if (sec) {
sec->sid = ksu_file_sid;
}
ret = get_unused_fd_flags(cmd.flags);
if (ret < 0) {
pr_err("mksu_fdwrapper: get unused fd failed: %d\n", ret);
goto put_wrapper_file;
}
// pr_info("mksu_fdwrapper: installed wrapper fd for %p %d (flags=%d, mode=%d) to %p %d (flags=%d, mode=%d)", f, cmd.fd, f->f_flags, f->f_mode, pf, ret, pf->f_flags, pf->f_mode);
// pf->f_mode |= FMODE_READ | FMODE_CAN_READ | FMODE_WRITE | FMODE_CAN_WRITE;
fd_install(ret, pf);
goto put_orig_file;
put_wrapper_file:
fput(pf);
put_wrapper_data:
mksu_delete_file_wrapper(data);
put_orig_file:
fput(f);
return ret;
}
// IOCTL handlers mapping table
static const struct ksu_ioctl_cmd_map ksu_ioctl_handlers[] = {
{ .cmd = KSU_IOCTL_GRANT_ROOT, .name = "GRANT_ROOT", .handler = do_grant_root, .perm_check = allowed_for_su },
@@ -532,6 +602,7 @@ static const struct ksu_ioctl_cmd_map ksu_ioctl_handlers[] = {
{ .cmd = KSU_IOCTL_SET_APP_PROFILE, .name = "SET_APP_PROFILE", .handler = do_set_app_profile, .perm_check = only_manager },
{ .cmd = KSU_IOCTL_GET_FEATURE, .name = "GET_FEATURE", .handler = do_get_feature, .perm_check = manager_or_root },
{ .cmd = KSU_IOCTL_SET_FEATURE, .name = "SET_FEATURE", .handler = do_set_feature, .perm_check = manager_or_root },
{ .cmd = KSU_IOCTL_GET_WRAPPER_FD, .name = "GET_WRAPPER_FD", .handler = do_get_wrapper_fd, .perm_check = manager_or_root },
{ .cmd = KSU_IOCTL_GET_FULL_VERSION,.name = "GET_FULL_VERSION", .handler = do_get_full_version, .perm_check = always_allow},
{ .cmd = KSU_IOCTL_HOOK_TYPE,.name = "GET_HOOK_TYPE", .handler = do_get_hook_type, .perm_check = manager_or_root},
{ .cmd = KSU_IOCTL_ENABLE_KPM, .name = "GET_ENABLE_KPM", .handler = do_enable_kpm, .perm_check = manager_or_root},
@@ -542,7 +613,7 @@ static const struct ksu_ioctl_cmd_map ksu_ioctl_handlers[] = {
{ .cmd = KSU_IOCTL_KPM, .name = "KPM_OPERATION", .handler = do_kpm, .perm_check = manager_or_root},
#endif
{ .cmd = 0, .name = NULL, .handler = NULL, .perm_check = NULL} // Sentine
};
}
void ksu_supercalls_init(void)
{