Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

[karo-tx-linux.git] / drivers / of / fdt.c

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index c4cddf0cd96d6d9bcd81bd9dcbed77f79ba1a8af..b777d8f46bd59696e366f957c27211411b32ef76 100644 (file)
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -880,6 +880,21 @@ void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
        const u64 phys_offset = __pa(PAGE_OFFSET);
        base &= PAGE_MASK;
        size &= PAGE_MASK;
+
+       if (sizeof(phys_addr_t) < sizeof(u64)) {
+               if (base > ULONG_MAX) {
+                       pr_warning("Ignoring memory block 0x%llx - 0x%llx\n",
+                                       base, base + size);
+                       return;
+               }
+
+               if (base + size > ULONG_MAX) {
+                       pr_warning("Ignoring memory range 0x%lx - 0x%llx\n",
+                                       ULONG_MAX, base + size);
+                       size = ULONG_MAX - base;
+               }
+       }
+
        if (base + size < phys_offset) {
                pr_warning("Ignoring memory block 0x%llx - 0x%llx\n",
                           base, base + size);