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kernel: Add nuke_ext4_sysfs interface (#632)

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Co-authored-by: weishu <twsxtd@gmail.com>
This commit is contained in:
AlexLiuDev233
2025-11-27 21:14:01 +08:00
committed by GitHub
parent 57e3c095be
commit 3a12bdead1
4 changed files with 41 additions and 6 deletions
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35
kernel/supercalls.c
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@@ -1,5 +1,3 @@
#include "supercalls.h"
#include <linux/anon_inodes.h>
#include <linux/capability.h>
#include <linux/cred.h>
@@ -14,6 +12,7 @@
#include <linux/uaccess.h>
#include <linux/version.h>
#include "supercalls.h"
#include "arch.h"
#include "allowlist.h"
#include "feature.h"
@@ -587,6 +586,36 @@ static int add_try_umount(void __user *arg)
return 0;
}
static int do_nuke_ext4_sysfs(void __user *arg)
{
struct ksu_nuke_ext4_sysfs_cmd cmd;
char mnt[256];
long ret;
if (copy_from_user(&cmd, arg, sizeof(cmd)))
return -EFAULT;
if (!cmd.arg)
return -EINVAL;
memset(mnt, 0, sizeof(mnt));
ret = strncpy_from_user(mnt, cmd.arg, sizeof(mnt));
if (ret < 0) {
pr_err("nuke ext4 copy mnt failed: %ld\\n", ret);
return -EFAULT; // 或者 return ret;
}
if (ret == sizeof(mnt)) {
pr_err("nuke ext4 mnt path too long\\n");
return -ENAMETOOLONG;
}
pr_info("do_nuke_ext4_sysfs: %s\n", mnt);
return nuke_ext4_sysfs(mnt);
}
// 100. GET_FULL_VERSION - Get full version string
static int do_get_full_version(void __user *arg)
{
@@ -763,7 +792,7 @@ static const struct ksu_ioctl_cmd_map ksu_ioctl_handlers[] = {
{ .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_MANAGE_MARK, .name = "MANAGE_MARK", .handler = do_manage_mark, .perm_check = manager_or_root },
//{ .cmd = KSU_IOCTL_NUKE_EXT4_SYSFS, .name = "NUKE_EXT4_SYSFS", .handler = do_nuke_ext4_sysfs, .perm_check = manager_or_root },
{ .cmd = KSU_IOCTL_NUKE_EXT4_SYSFS, .name = "NUKE_EXT4_SYSFS", .handler = do_nuke_ext4_sysfs, .perm_check = manager_or_root },
{ .cmd = KSU_IOCTL_ADD_TRY_UMOUNT, .name = "ADD_TRY_UMOUNT", .handler = add_try_umount, .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},