Now that kexec_walk_memblock() can do the crash-kernel placement itself architectures that don't support kdump via kexe_file_load() need to explicitly forbid it. We don't support this on arm64 until the kernel can add the elfcorehdr and usable-memory-range fields to the DT. Without these the crash-kernel overwrites the previous kernel's memory during startup. Add a check to refuse crash image loading. Signed-off-by: James Morse <james.morse@xxxxxxx> --- Context: http://lore.kernel.org/r/20181206155424.GA4422@xxxxxxx arch/arm64/kernel/kexec_image.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/kernel/kexec_image.c b/arch/arm64/kernel/kexec_image.c index 1ad1d5f8f024..07bf740bea91 100644 --- a/arch/arm64/kernel/kexec_image.c +++ b/arch/arm64/kernel/kexec_image.c @@ -47,6 +47,10 @@ static void *image_load(struct kimage *image, struct kexec_segment *kernel_segment; int ret; + /* We don't support crash kernels yet. */ + if (image->type == KEXEC_TYPE_CRASH) + return ERR_PTR(-EOPNOTSUPP); + /* * We require a kernel with an unambiguous Image header. Per * Documentation/booting.txt, this is the case when image_size -- 2.19.2
