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| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2019-04-17 15:59:15 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-04-21 16:12:39 +0300 |
| commit | e09093927e54323018dbb3bf6189c85a7f176bae (patch) | |
| tree | 46707f04e29140d7f1213650c616277a64fa7bec /arch/powerpc/mm/pgtable_64.c | |
| parent | 0034d395f89d9c092bb15adbabdca5283e258b41 (diff) | |
| download | linux-e09093927e54323018dbb3bf6189c85a7f176bae.tar.xz | |
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_64.c')
| -rw-r--r-- | arch/powerpc/mm/pgtable_64.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c index 56068cac2a3c..72f58c076e26 100644 --- a/arch/powerpc/mm/pgtable_64.c +++ b/arch/powerpc/mm/pgtable_64.c @@ -121,6 +121,11 @@ void __iomem *__ioremap_at(phys_addr_t pa, void *ea, unsigned long size, pgprot_ if (pgprot_val(prot) & H_PAGE_4K_PFN) return NULL; + if ((ea + size) >= (void *)IOREMAP_END) { + pr_warn("Outisde the supported range\n"); + return NULL; + } + WARN_ON(pa & ~PAGE_MASK); WARN_ON(((unsigned long)ea) & ~PAGE_MASK); WARN_ON(size & ~PAGE_MASK); |