Am Dienstag, den 20.11.2018, 14:27 +0100 schrieb Stefan Agner: > Add length to the struct dw_pcie and check that the accessors > dw_pcie_(rd|wr)_own_conf() do not read/write beyond that point. > > Signed-off-by: Stefan Agner <[email protected]>
FWIW: Reviewed-by: Lucas Stach <[email protected]> > --- > drivers/pci/controller/dwc/pcie-designware-host.c | 4 ++++ > drivers/pci/controller/dwc/pcie-designware.h | 1 + > 2 files changed, 5 insertions(+) > > diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c > b/drivers/pci/controller/dwc/pcie-designware-host.c > index 29a05759a294..b422538ee0bb 100644 > --- a/drivers/pci/controller/dwc/pcie-designware-host.c > +++ b/drivers/pci/controller/dwc/pcie-designware-host.c > @@ -29,6 +29,8 @@ static int dw_pcie_rd_own_conf(struct pcie_port *pp, int > where, int size, > > return pp->ops->rd_own_conf(pp, where, size, val); > > > pci = to_dw_pcie_from_pp(pp); > > + if (pci->dbi_length && where + size > pci->dbi_length) > > + return PCIBIOS_BAD_REGISTER_NUMBER; > > return dw_pcie_read(pci->dbi_base + where, size, val); > } > > @@ -41,6 +43,8 @@ static int dw_pcie_wr_own_conf(struct pcie_port *pp, int > where, int size, > > return pp->ops->wr_own_conf(pp, where, size, val); > > > pci = to_dw_pcie_from_pp(pp); > > + if (pci->dbi_length && where + size > pci->dbi_length) > > + return PCIBIOS_BAD_REGISTER_NUMBER; > > return dw_pcie_write(pci->dbi_base + where, size, val); > } > > diff --git a/drivers/pci/controller/dwc/pcie-designware.h > b/drivers/pci/controller/dwc/pcie-designware.h > index 9f1a5e399b70..5be5f369abf2 100644 > --- a/drivers/pci/controller/dwc/pcie-designware.h > +++ b/drivers/pci/controller/dwc/pcie-designware.h > @@ -215,6 +215,7 @@ struct dw_pcie { > > > struct device *dev; > > > void __iomem *dbi_base; > > > void __iomem *dbi_base2; > > > + int dbi_length; > > > u32 num_viewport; > > > u8 iatu_unroll_enabled; > > > struct pcie_port pp;
