diff options
| author | Yuntao Wang | 2023-08-07 16:45:47 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-11-20 11:51:50 +0100 |
| commit | dbb558160323aded3b9de2d2bcbe788be5813317 (patch) | |
| tree | db7e2ba97034eadf262e8a28338019b2b23f36b2 /arch/x86/kernel | |
| parent | 21c5c3f95f25ae1ba1cb14f261bcd0438b832372 (diff) | |
x86/boot: Fix incorrect startup_gdt_descr.size
[ Upstream commit 001470fed5959d01faecbd57fcf2f60294da0de1 ]
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 (too large by one), fix it.
[ mingo: This probably never mattered, because startup_gdt[] is only used
in a very controlled fashion - but make it consistent nevertheless. ]
Fixes: 866b556efa12 ("x86/head/64: Install startup GDT")
Signed-off-by: Yuntao Wang <ytcoode@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lore.kernel.org/r/20230807084547.217390-1-ytcoode@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/head64.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index 6a3cfaf6b72a..84adf12a76d3 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, }; |