diff options
| author | Madhusudanan Kandasamy <kmadhu@linux.vnet.ibm.com> | 2014-07-10 20:45:13 +0530 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-08-05 16:34:06 +1000 |
| commit | eeb03a6eaa02e9171f91e385c52a69b159fc6117 (patch) | |
| tree | 8325d4ab23b055571595fb2b1434d7378201dfca /net/lapb | |
| parent | db97efffb80652f7f879bc1d4837cbc84dc32557 (diff) | |
powerpc: Fail remap_4k_pfn() if PFN doesn't fit inside PTE
remap_4k_pfn() silently truncates upper bits of input 4K PFN
if it cannot be contained in PTE. This leads invalid memory mapping and could
result in a system crash when the memory is accessed. This patch fails
remap_4k_pfn() and returns -EINVAL if the input 4K PFN cannot be contained in
PTE.
V3 : Added parentheses to protect 'pfn' and entire macro as suggested by Brian.
V2 : Rewritten to avoid helper function as suggested by Stephen Rothwell.
Signed-off-by: Madhusudanan Kandasamy <kmadhu@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'net/lapb')
0 files changed, 0 insertions, 0 deletions