1 files changed, 12 insertions, 2 deletions

diff --git a/arch/powerpc/boot/main.c b/arch/powerpc/boot/main.c
index 9e7f3ddd9913..ae32801ebd69 100644
--- a/arch/powerpc/boot/main.c
+++ b/arch/powerpc/boot/main.c
@@ -56,9 +56,19 @@ static struct addr_range prep_kernel(void)
         if (platform_ops.vmlinux_alloc) {
                 addr = platform_ops.vmlinux_alloc(ei.memsize);
         } else {
-                if ((unsigned long)_start < ei.memsize)
+                /*
+                 * Check if the kernel image (without bss) would overwrite the
+                 * bootwrapper. The device tree has been moved in fdt_init()
+                 * to an area allocated with malloc() (somewhere past _end).
+                 */
+                if ((unsigned long)_start < ei.loadsize)
                         fatal("Insufficient memory for kernel at address 0!"
-                               " (_start=%p)\n\r", _start);
+                               " (_start=%p, uncomressed size=%08x)\n\r",
+                               _start, ei.loadsize);
+
+                if ((unsigned long)_end < ei.memsize)
+                        fatal("The final kernel image would overwrite the "
+                                        "device tree\n\r");
         }
 
         /* Finally, gunzip the kernel */