Commit a8f108d7 authored Nov 23, 2016 by Marcin Nowakowski Committed by Ralf Baechle Jan 03, 2017

MIPS: kexec: Do not reserve invalid crashkernel memory on boot



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@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14612/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

parent 73fbc1eb

arch/mips/kernel/setup.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -741,6 +741,11 @@ static void __init mips_parse_crashkernel(void)
		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;
		}