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Message-ID: <20231221101702.20956-1-ytcoode@gmail.com> Date: Thu, 21 Dec 2023 18:17:02 +0800 From: Yuntao Wang <ytcoode@...il.com> To: linux-kernel@...r.kernel.org, x86@...nel.org Cc: Andrew Morton <akpm@...ux-foundation.org>, Baoquan He <bhe@...hat.com>, 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>, Simon Horman <horms@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>, Yuntao Wang <ytcoode@...il.com> Subject: [PATCH] x86/kexec: fix incorrect end address passed to kernel_ident_mapping_init() kernel_ident_mapping_init() takes an exclusive memory range [pstart, pend) where pend is not included in the range, while res represents an inclusive memory range [start, end] where end is considered part of the range. Therefore, passing res->end directly to kernel_ident_mapping_init() is incorrect, the correct end address should be `res->end + 1`. Signed-off-by: Yuntao Wang <ytcoode@...il.com> --- arch/x86/kernel/machine_kexec_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c index 6f8df998890e..bc0a5348b4a6 100644 --- a/arch/x86/kernel/machine_kexec_64.c +++ b/arch/x86/kernel/machine_kexec_64.c @@ -44,7 +44,7 @@ static int mem_region_callback(struct resource *res, void *arg) struct init_pgtable_data *data = arg; return kernel_ident_mapping_init(data->info, data->level4p, - res->start, res->end); + res->start, res->end + 1); } static int -- 2.43.0
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