linux-kernel - [PATCH 5.18 0223/1095] ACPI: APEI: Fix _EINJ vs EFI_MEMORY

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Message-Id: <20220815180438.934104323@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 19:53:42 +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, Tony Luck <tony.luck@...el.com>,
        Omar Avelar <omar.avelar@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 0223/1095] ACPI: APEI: Fix _EINJ vs EFI_MEMORY_SP

From: Dan Williams <dan.j.williams@...el.com>

[ Upstream commit b13a3e5fd40b7d1b394c5ecbb5eb301a4c38e7b2 ]

When a platform marks a memory range as "special purpose" it is not
onlined as System RAM by default. However, it is still suitable for
error injection. Add IORES_DESC_SOFT_RESERVED to einj_error_inject() as
a permissible memory type in the sanity checking of the arguments to
_EINJ.

Fixes: 262b45ae3ab4 ("x86/efi: EFI soft reservation to E820 enumeration")
Reviewed-by: Tony Luck <tony.luck@...el.com>
Reported-by: Omar Avelar <omar.avelar@...el.com>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/acpi/apei/einj.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c
index 95cc2a9f3e05..49b5e317e916 100644
--- a/drivers/acpi/apei/einj.c
+++ b/drivers/acpi/apei/einj.c
@@ -546,6 +546,8 @@ static int einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
 				!= REGION_INTERSECTS) &&
 	     (region_intersects(base_addr, size, IORESOURCE_MEM, IORES_DESC_PERSISTENT_MEMORY)
 				!= REGION_INTERSECTS) &&
+	     (region_intersects(base_addr, size, IORESOURCE_MEM, IORES_DESC_SOFT_RESERVED)
+				!= REGION_INTERSECTS) &&
 	     !arch_is_platform_page(base_addr)))
 		return -EINVAL;
 
-- 
2.35.1