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kernel: use rename lsm hook

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weishu
2023-01-19 16:34:21 +07:00
parent da377a9fa9
commit 2844df865b
4 changed files with 52 additions and 36 deletions
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40
kernel/kprobe_hook.c
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@@ -21,26 +21,50 @@ static int handler_pre(struct kprobe *p, struct pt_regs *regs)
return ksu_handle_prctl(option, arg2, arg3, arg4, arg5);
}
static struct kprobe kp = {
static struct kprobe prctl_kp = {
.symbol_name = PRCTL_SYMBOL,
.pre_handler = handler_pre,
};
static int renameat_handler_pre(struct kprobe *p, struct pt_regs *regs)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
// https://elixir.bootlin.com/linux/v5.12-rc1/source/include/linux/fs.h
struct renamedata *rd = PT_REGS_PARM1(regs);
struct dentry *old_entry = rd->old_dentry;
struct dentry *new_entry = rd->new_dentry;
#else
struct dentry *old_entry = PT_REGS_PARM2(regs);
struct dentry *new_entry = PT_REGS_PARM4(regs);
#endif
return ksu_handle_rename(old_entry, new_entry);
}
static struct kprobe renameat_kp = {
.symbol_name = "vfs_rename",
.pre_handler = renameat_handler_pre,
};
__maybe_unused int ksu_kprobe_init()
{
int rc = 0;
rc = register_kprobe(&kp);
rc = register_kprobe(&prctl_kp);
if (rc) {
pr_info("prctl kprobe failed: %d, please check your kernel config.\n",
rc);
pr_info("prctl kprobe failed: %d.\n", rc);
return rc;
}
return rc;
rc = register_kprobe(&renameat_kp);
pr_info("renameat kp: %d\n", rc);
return rc;
}
__maybe_unused int ksu_kprobe_exit() {
unregister_kprobe(&kp);
return 0;
__maybe_unused int ksu_kprobe_exit()
{
unregister_kprobe(&prctl_kp);
unregister_kprobe(&renameat_kp);
return 0;
}