Messages in this thread | | | Date | Mon, 11 Mar 2019 12:14:12 -0700 (PDT) | Subject | Re: [PATCH v2] isdn: hfcpci: fix potential NULL pointer dereference | From | David Miller <> |
| |
From: Kangjie Lu <kjlu@umn.edu> Date: Mon, 11 Mar 2019 00:34:34 -0500
> In case ioremap fails, the fix releases resources and returns. > > Signed-off-by: Kangjie Lu <kjlu@umn.edu> > --- > drivers/isdn/hardware/mISDN/hfcpci.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/drivers/isdn/hardware/mISDN/hfcpci.c b/drivers/isdn/hardware/mISDN/hfcpci.c > index ebb3fa2e1d00..d1d53c5de3c0 100644 > --- a/drivers/isdn/hardware/mISDN/hfcpci.c > +++ b/drivers/isdn/hardware/mISDN/hfcpci.c > @@ -2036,6 +2036,12 @@ setup_hw(struct hfc_pci *hc) > "HFC-PCI: defined at mem %#lx fifo %#lx(%#lx) IRQ %d HZ %d\n", > (u_long) hc->hw.pci_io, (u_long) hc->hw.fifos, > (u_long) hc->hw.dmahandle, hc->irq, HZ); > + if (unlikely(!hc->hw.pci_io)) { > + pci_free_consistent(hc->pdev, 0x8000, hc->hw.fifos, > + hc->hw.dmahandle); > + return 1; > + }
The log message emitted before this new check reports detection of the device, which you should not do if we are going to fail the probe.
| |