From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/fs/proc/kcore.c | 28 ++++++++++++++++------------
1 files changed, 16 insertions(+), 12 deletions(-)
diff --git a/kernel/fs/proc/kcore.c b/kernel/fs/proc/kcore.c
index d0137e3..4d2e64e 100644
--- a/kernel/fs/proc/kcore.c
+++ b/kernel/fs/proc/kcore.c
@@ -22,7 +22,7 @@
#include <linux/vmalloc.h>
#include <linux/highmem.h>
#include <linux/printk.h>
-#include <linux/bootmem.h>
+#include <linux/memblock.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
@@ -31,6 +31,7 @@
#include <linux/ioport.h>
#include <linux/memory.h>
#include <linux/sched/task.h>
+#include <linux/security.h>
#include <asm/sections.h>
#include "internal.h"
@@ -192,8 +193,6 @@
return 1;
p = pfn_to_page(pfn);
- if (!memmap_valid_within(pfn, p, page_zone(p)))
- return 1;
ent = kmalloc(sizeof(*ent), GFP_KERNEL);
if (!ent)
@@ -511,7 +510,8 @@
* Using bounce buffer to bypass the
* hardened user copy kernel text checks.
*/
- if (probe_kernel_read(buf, (void *) start, tsz)) {
+ if (copy_from_kernel_nofault(buf, (void *)start,
+ tsz)) {
if (clear_user(buffer, tsz)) {
ret = -EFAULT;
goto out;
@@ -545,8 +545,13 @@
static int open_kcore(struct inode *inode, struct file *filp)
{
+ int ret = security_locked_down(LOCKDOWN_KCORE);
+
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
+
+ if (ret)
+ return ret;
filp->private_data = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!filp->private_data)
@@ -568,11 +573,11 @@
return 0;
}
-static const struct file_operations proc_kcore_operations = {
- .read = read_kcore,
- .open = open_kcore,
- .release = release_kcore,
- .llseek = default_llseek,
+static const struct proc_ops kcore_proc_ops = {
+ .proc_read = read_kcore,
+ .proc_open = open_kcore,
+ .proc_release = release_kcore,
+ .proc_lseek = default_llseek,
};
/* just remember that we have to update kcore */
@@ -615,7 +620,7 @@
/*
* MODULES_VADDR has no intersection with VMALLOC_ADDR.
*/
-struct kcore_list kcore_modules;
+static struct kcore_list kcore_modules;
static void __init add_modules_range(void)
{
if (MODULES_VADDR != VMALLOC_START && MODULES_END != VMALLOC_END) {
@@ -631,8 +636,7 @@
static int __init proc_kcore_init(void)
{
- proc_root_kcore = proc_create("kcore", S_IRUSR, NULL,
- &proc_kcore_operations);
+ proc_root_kcore = proc_create("kcore", S_IRUSR, NULL, &kcore_proc_ops);
if (!proc_root_kcore) {
pr_err("couldn't create /proc/kcore\n");
return 0; /* Always returns 0. */
--
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