diff options
| author |   Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2019-04-17 18:29:15 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2019-04-21 23:12:39 +1000 |
| commit | e09093927e54323018dbb3bf6189c85a7f176bae (patch) | |
| tree | 46707f04e29140d7f1213650c616277a64fa7bec /arch/powerpc/mm/pgtable-radix.c | |
| parent | powerpc/mm/hash64: Map all the kernel regions in the same 0xc range (diff) | |
| download | linux-dev-e09093927e54323018dbb3bf6189c85a7f176bae.tar.xz linux-dev-e09093927e54323018dbb3bf6189c85a7f176bae.zip | |
powerpc/mm: Validate address values against different region limits
This adds an explicit check in various functions.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/pgtable-radix.c')
| -rw-r--r-- | arch/powerpc/mm/pgtable-radix.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c index 4d9fa9e900d5..e6d5065b0bc8 100644 --- a/arch/powerpc/mm/pgtable-radix.c +++ b/arch/powerpc/mm/pgtable-radix.c @@ -339,6 +339,12 @@ void __init radix_init_pgtable(void) * page tables will be allocated within the range. No * need or a node (which we don't have yet). */ + + if ((reg->base + reg->size) >= RADIX_VMALLOC_START) { + pr_warn("Outisde the supported range\n"); + continue; + } + WARN_ON(create_physical_mapping(reg->base, reg->base + reg->size, -1)); @@ -895,6 +901,11 @@ static void __meminit remove_pagetable(unsigned long start, unsigned long end) int __meminit radix__create_section_mapping(unsigned long start, unsigned long end, int nid) { + if (end >= RADIX_VMALLOC_START) { + pr_warn("Outisde the supported range\n"); + return -1; + } + return create_physical_mapping(start, end, nid); } @@ -922,6 +933,11 @@ int __meminit radix__vmemmap_create_mapping(unsigned long start, int nid = early_pfn_to_nid(phys >> PAGE_SHIFT); int ret; + if ((start + page_size) >= RADIX_VMEMMAP_END) { + pr_warn("Outisde the supported range\n"); + return -1; + } + ret = __map_kernel_page_nid(start, phys, __pgprot(flags), page_size, nid); BUG_ON(ret); |