ARM: initrd: disable initrds outside of memory
We can't cope with initrds outside of memory, so check that the
initrd is within some declared memory to the kernel before using
it. Otherwise we're likely to OOPS during boot.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index b2cf946..c19571c 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -331,6 +331,12 @@
#endif
#ifdef CONFIG_BLK_DEV_INITRD
if (phys_initrd_size &&
+ !memblock_is_region_memory(phys_initrd_start, phys_initrd_size)) {
+ pr_err("INITRD: 0x%08lx+0x%08lx is not a memory region - disabling initrd\n",
+ phys_initrd_start, phys_initrd_size);
+ phys_initrd_start = phys_initrd_size = 0;
+ }
+ if (phys_initrd_size &&
memblock_is_region_reserved(phys_initrd_start, phys_initrd_size)) {
pr_err("INITRD: 0x%08lx+0x%08lx overlaps in-use memory region - disabling initrd\n",
phys_initrd_start, phys_initrd_size);