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>
---
arch/mips/kernel/setup.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index ae88866..01d1dbd 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -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;
}
--
2.7.4
