This is a note to let you know that I've just added the patch titled
MIPS: kexec: Do not reserve invalid crashkernel memory on boot
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mips-kexec-do-not-reserve-invalid-crashkernel-memory-on-boot.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Oct 5 10:58:04 CEST 2017
From: Marcin Nowakowski <marcin.nowakowski@xxxxxxxxxx>
Date: Wed, 23 Nov 2016 14:43:50 +0100
Subject: MIPS: kexec: Do not reserve invalid crashkernel memory on boot
From: Marcin Nowakowski <marcin.nowakowski@xxxxxxxxxx>
[ Upstream commit a8f108d70c74d83574c157648383eb2e4285a190 ]
Do not reserve memory for the crashkernel if the commandline argument
points to a wrong location. This can happen if the location is specified
wrong or if the same commandline is reused when starting the crashkernel
- in the latter case the reserved memory would point to the location
from which the crashkernel is executing.
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@xxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Patchwork: https://patchwork.linux-mips.org/patch/14612/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/mips/kernel/setup.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -585,6 +585,11 @@ static void __init mips_parse_crashkerne
if (ret != 0 || crash_size <= 0)
return;
+ if (!memory_region_available(crash_base, crash_size)) {
+ pr_warn("Invalid memory region reserved for crash kernel\n");
+ return;
+ }
+
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
}
Patches currently in stable-queue which might be from marcin.nowakowski@xxxxxxxxxx are
queue-3.18/mips-kexec-do-not-reserve-invalid-crashkernel-memory-on-boot.patch