From bedbef8ad3e75a304af6361af235302bcc61d06b Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 14 May 2024 06:39:01 +0000
Subject: [PATCH] 修改内核路径
---
kernel/include/linux/uaccess.h | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/kernel/include/linux/uaccess.h b/kernel/include/linux/uaccess.h
index c7c6e8b..2066876 100644
--- a/kernel/include/linux/uaccess.h
+++ b/kernel/include/linux/uaccess.h
@@ -348,6 +348,10 @@
size_t size = min(ksize, usize);
size_t rest = max(ksize, usize) - size;
+ /* Double check if ksize is larger than a known object size. */
+ if (WARN_ON_ONCE(ksize > __builtin_object_size(dst, 1)))
+ return -E2BIG;
+
/* Deal with trailing bytes. */
if (usize < ksize) {
memset(dst + size, 0, rest);
--
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