linux-kernel - [PATCH 5.19 137/155] arm64/kexec: Fix missing extra range for crashkres

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Date:   Tue,  6 Sep 2022 15:31:25 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Levi Yun <ppbuk5246@...il.com>,
        Baoquan He <bhe@...hat.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
Subject: [PATCH 5.19 137/155] arm64/kexec: Fix missing extra range for crashkres_low.

From: Levi Yun <ppbuk5246@...il.com>

commit 4831be702b95047c89b3fa5728d07091e9e9f7c9 upstream.

Like crashk_res, Calling crash_exclude_mem_range function with
crashk_low_res area would need extra crash_mem range too.

Add one more extra cmem slot in case of crashk_low_res is used.

Signed-off-by: Levi Yun <ppbuk5246@...il.com>
Fixes: 944a45abfabc ("arm64: kdump: Reimplement crashkernel=X")
Cc: <stable@...r.kernel.org> # 5.19.x
Acked-by: Baoquan He <bhe@...hat.com>
Reviewed-by: Catalin Marinas <catalin.marinas@....com>
Link: https://lore.kernel.org/r/20220831103913.12661-1-ppbuk5246@gmail.com
Signed-off-by: Will Deacon <will@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/arm64/kernel/machine_kexec_file.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm64/kernel/machine_kexec_file.c
+++ b/arch/arm64/kernel/machine_kexec_file.c
@@ -47,7 +47,7 @@ static int prepare_elf_headers(void **ad
 	u64 i;
 	phys_addr_t start, end;
 
-	nr_ranges = 1; /* for exclusion of crashkernel region */
+	nr_ranges = 2; /* for exclusion of crashkernel region */
 	for_each_mem_range(i, &start, &end)
 		nr_ranges++;