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Message-ID: <20230807084547.217390-1-ytcoode@gmail.com>
Date: Mon, 7 Aug 2023 16:45:47 +0800
From: Yuntao Wang <ytcoode@...il.com>
To: x86@...nel.org, linux-kernel@...r.kernel.org
Cc: Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>,
"H. Peter Anvin" <hpa@...or.com>,
"Peter Zijlstra (Intel)" <peterz@...radead.org>,
Anshuman Khandual <anshuman.khandual@....com>,
Josh Poimboeuf <jpoimboe@...nel.org>,
Pasha Tatashin <pasha.tatashin@...een.com>,
Joerg Roedel <jroedel@...e.de>, Yuntao Wang <ytcoode@...il.com>
Subject: [PATCH] x86/head: Fix incorrect size value of startup_gdt_descr
Since the size value is added to the base address to yield the last valid
byte address of the GDT, the current size value of startup_gdt_descr is
incorrect, fix it.
Fixes: 866b556efa12 ("x86/head/64: Install startup GDT")
Signed-off-by: Yuntao Wang <ytcoode@...il.com>
---
arch/x86/kernel/head64.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 49f7629b17f7..cfd70939a099 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -80,7 +80,7 @@ static struct desc_struct startup_gdt[GDT_ENTRIES] = {
* while the kernel still uses a direct mapping.
*/
static struct desc_ptr startup_gdt_descr = {
- .size = sizeof(startup_gdt),
+ .size = sizeof(startup_gdt) - 1,
.address = 0,
};
--
2.41.0
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