File kdump-nokaslr.patch of Package kdump

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File kdump-nokaslr.patch of Package kdump

From: Petr Tesarik <ptesarik@suse.com>
Date: Tue, 27 Feb 2018 09:57:04 +0100
Subject: Add 'nokaslr' to the kdump kernel command line
References: bsc#1075937
Upstream: merged
Git-commit: 0724bcc8220bf2bd4a3598185dcd5ec7e9e5fe47

The kASLR algorithm may decide to place the kernel into low memory,
which does not leave enough space for SWIOTLB, and dumping fails
later on. Since the kdump environment does not run any exploitable
services, kASLR can be safely disabled.

Note that kexec already avoids the low memory reservation when
finding a suitable location for the kernel, initrd and other data.

Signed-off-by: Petr Tesarik <ptesarik@suse.com>
---
 init/load.sh |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/init/load.sh
+++ b/init/load.sh
@@ -72,7 +72,7 @@ function build_kdump_commandline()
             nr_cpus=$(cpus_param "$kdump_kernel")=${KDUMP_CPUS:-1}
         fi
         # Use deadline for saving the memory footprint
-        commandline="$commandline elevator=deadline sysrq=yes reset_devices acpi_no_memhotplug cgroup_disable=memory"
+        commandline="$commandline elevator=deadline sysrq=yes reset_devices acpi_no_memhotplug cgroup_disable=memory nokaslr"
         commandline="$commandline irqpoll ${nr_cpus}"
         commandline="$commandline root=kdump rootflags=bind rd.udev.children-max=8"
         case $(uname -i) in

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File kdump-nokaslr.patch of Package kdump

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