linux-kernel - [PATCH] Prevent reserving RAM in the region already reserved by BIOS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 18 May 2010 22:35:30 -0700
From:	Mathieu Rondonneau <mathieu.rondonneau@...il.com>
To:	yinghai@...nel.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org
Cc:	Me <mathieu.rondonneau@...il.com>
Subject: [PATCH] Prevent reserving RAM in the region already reserved by BIOS

Does it make sense to prevent looking for stolen RAM below the ISA section.


Signed-off-by: Mathieu Rondonneau <mathieu.rondonneau@...il.com>
---
 arch/x86/kernel/e820.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 7bca3c6..322c9c3 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -1156,6 +1156,8 @@ void __init e820_reserve_resources_late(void)
                        end = MAX_RESOURCE_SIZE;
                if (start >= end)
                        continue;
+               if (end < ISA_START_ADDRESS)
+                       continue;
                printk(KERN_DEBUG "reserve RAM buffer: %016llx - %016llx ",
                               start, end);
                reserve_region_with_split(&iomem_resource, start, end,
-- 
1.6.3.3
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/