vmalloc_limit easily overflows if CONFIG_VMSPLIT_1G=y and CONFIG_ARM_LPAE=n,
in this case whole memory turns into "highmem" and system cannot boot.
For example if PHYS_OFFSET=0x80000000 and PAGE_OFFSET=0x40000000 then
vmalloc_limit should be 0x1_2F800000, but value does not fit into variable.
Signed-off-by: Konstantin Khlebnikov <k.khlebni...@samsung.com>
---
arch/arm/mm/mmu.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 9f98cec..9d2cdda 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -1075,10 +1075,14 @@ phys_addr_t arm_lowmem_limit __initdata = 0;
void __init sanity_check_meminfo(void)
{
phys_addr_t memblock_limit = 0;
+ phys_addr_t vmalloc_limit = -1;
int highmem = 0;
- phys_addr_t vmalloc_limit = __pa(vmalloc_min - 1) + 1;
struct memblock_region *reg;
+ if ((unsigned long)vmalloc_min - PAGE_OFFSET <
+ vmalloc_limit - PHYS_OFFSET)
+ vmalloc_limit = __pa(vmalloc_min - 1) + 1;
+
for_each_memblock(memory, reg) {
phys_addr_t block_start = reg->base;
phys_addr_t block_end = reg->base + reg->size;
--
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