32 lines
1.3 KiB
Diff
32 lines
1.3 KiB
Diff
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From: Petr Tesarik <ptesarik@suse.com>
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Date: Tue, 27 Feb 2018 09:57:04 +0100
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Subject: Add 'nokaslr' to the kdump kernel command line
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References: bsc#1075937
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Upstream: merged
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Git-commit: 0724bcc8220bf2bd4a3598185dcd5ec7e9e5fe47
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The kASLR algorithm may decide to place the kernel into low memory,
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which does not leave enough space for SWIOTLB, and dumping fails
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later on. Since the kdump environment does not run any exploitable
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services, kASLR can be safely disabled.
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Note that kexec already avoids the low memory reservation when
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finding a suitable location for the kernel, initrd and other data.
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Signed-off-by: Petr Tesarik <ptesarik@suse.com>
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---
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init/load.sh | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/init/load.sh
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+++ b/init/load.sh
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@@ -72,7 +72,7 @@ function build_kdump_commandline()
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nr_cpus=$(cpus_param "$kdump_kernel")=${KDUMP_CPUS:-1}
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fi
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# Use deadline for saving the memory footprint
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- commandline="$commandline elevator=deadline sysrq=yes reset_devices acpi_no_memhotplug cgroup_disable=memory"
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+ commandline="$commandline elevator=deadline sysrq=yes reset_devices acpi_no_memhotplug cgroup_disable=memory nokaslr"
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commandline="$commandline irqpoll ${nr_cpus}"
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commandline="$commandline root=kdump rootflags=bind rd.udev.children-max=8"
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case $(uname -i) in
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