mirror of
https://github.com/ps5-payload-dev/sdk.git
synced 2026-10-22 11:23:06 -05:00
102 lines
2.1 KiB
C
102 lines
2.1 KiB
C
/* Copyright (C) 2024 John Törnblom
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "kernel.h"
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#include "klog.h"
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#include "payload.h"
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#include "syscall.h"
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/**
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* Patch syscall permissions of the currently running process.
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**/
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static int
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patch_syscall_permissions(void) {
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int pid = __crt_syscall(SYS_getpid);
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unsigned long kproc;
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unsigned long kaddr;
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unsigned long uaddr;
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if(!(kproc=kernel_get_proc(pid))) {
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return -1;
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}
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if(kernel_copyout(kproc + 0x3e8, &kaddr, sizeof(kaddr)) < 0) {
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return -1;
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}
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// set lowest address allowed to make syscalls
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uaddr = 0;
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if(kernel_copyin(&uaddr, kaddr + 0xf0, sizeof(uaddr)) < 0) {
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return -1;
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}
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// set highest address allowed to make syscalls
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uaddr = -1;
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if(kernel_copyin(&uaddr, kaddr + 0xf8, sizeof(uaddr)) < 0) {
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return -1;
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}
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return 0;
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}
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/**
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* Patch the credentials of the currently running process.
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**/
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static int
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patch_kernel_ucred(void) {
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int pid = __crt_syscall(SYS_getpid);
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unsigned char attrs[32];
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unsigned char caps[16];
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if(kernel_get_ucred_caps(pid, caps)) {
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return -1;
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}
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if(kernel_get_ucred_attrs(pid, attrs)) {
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return -1;
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}
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caps[5] = 0x1c; // ??
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caps[7] = 0x40; // jail related?
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caps[15] |= 0x40; // jitshm
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attrs[3] |= 0x80; // ptrace
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if(kernel_set_ucred_caps(pid, caps)) {
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return -1;
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}
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if(kernel_set_ucred_attrs(pid, attrs)) {
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return -1;
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}
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return 0;
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}
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int
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__patch_init(void) {
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int error;
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if((error=patch_kernel_ucred())) {
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return error;
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}
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if((error=patch_syscall_permissions())) {
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return error;
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}
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return 0;
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}
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