microsoft
/
WSL2-Linux-Kernel
зеркало из https://github.com/microsoft/WSL2-Linux-Kernel.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
WSL2-Linux-Kernel/drivers/pci
История
Niklas Cassel 794a8604fe PCI: dwc: Fix dw_pcie_ops NULL pointer dereference 
Fix a crash from dereferencing a NULL dw_pcie_ops pointer.  For example,
on ARTPEC-6:

  Unable to handle kernel NULL pointer dereference at virtual address 00000004
  pgd = c0204000
  [00000004] *pgd=00000000
  Internal error: Oops: 5 [#1] SMP ARM
  Modules linked in:
  CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.11.0-rc3-next-20170321 #1
  Hardware name: Axis ARTPEC-6 Platform
  task: db098000 task.stack: db096000
  PC is at dw_pcie_writel_dbi+0x2c/0xd0

Prior to 442ec4c04d ("PCI: dwc: all: Split struct pcie_port into
host-only and core structures"), every driver had a struct pcie_host_ops
with function pointers, typically used as:

  if (pp->ops->readl_rc)
    return pp->ops->readl_rc(...);

442ec4c04d split struct pcie_host_ops into two pieces: struct
dw_pcie_host_ops and struct dw_pcie_ops, so the above became:

  if (pci->ops->readl_dbi)
    return pci->ops->readl_dbi(...);

But pcie-artpec6.c and pcie-designware-plat.c don't need the dw_pcie_ops
pointers and didn't supply a pci->ops struct, which leads to NULL pointer
dereferences.

Supply an empty struct dw_pcie_ops to avoid the NULL pointer dereferences.

[bhelgaas: changelog]
Fixes: 442ec4c04d ("PCI: dwc: all: Split struct pcie_port into host-only and core structures")
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Joao Pinto <jpinto@synopsys.com>
 		2017-04-04 08:24:25 -05:00
..
dwc PCI: dwc: Fix dw_pcie_ops NULL pointer dereference 2017-04-04 08:24:25 -05:00
host PCI: thunder-pem: Fix legacy firmware PEM-specific resources 2017-04-03 15:10:21 -05:00
hotplug sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
pcie PCI/ASPM: Always set link->downstream to avoid NULL dereference on remove 2017-03-07 14:23:30 -06:00
Kconfig PCI: Move DesignWare IP support to new drivers/pci/dwc/ directory 2017-02-21 14:59:53 -06:00
Makefile PCI: dwc: Remove dependency of designware on CONFIG_PCI 2017-02-21 15:00:26 -06:00
access.c sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
ats.c
…
bus.c
…
ecam.c
…
host-bridge.c
…
hotplug-pci.c
…
htirq.c
…
iov.c PCI: Lock each enable/disable num_vfs operation in sysfs 2017-02-03 13:42:38 -06:00
irq.c
…
msi.c PCI: add an API to get node from vector 2017-03-02 08:56:04 -07:00
of.c
…
pci-acpi.c
…
pci-driver.c pci-v4.11-changes 2017-02-23 11:53:22 -08:00
pci-label.c
…
pci-mid.c
…
pci-stub.c
…
pci-sysfs.c PCI: Lock each enable/disable num_vfs operation in sysfs 2017-02-03 13:42:38 -06:00
pci.c Revert "PCI: pciehp: Add runtime PM support for PCIe hotplug ports" 2017-02-03 08:53:51 -06:00
pci.h PCI: Lock each enable/disable num_vfs operation in sysfs 2017-02-03 13:42:38 -06:00
probe.c pci-v4.11-changes 2017-02-23 11:53:22 -08:00
proc.c
…
quirks.c PCI: Prevent VPD access for QLogic ISP2722 2017-03-07 14:16:57 -06:00
remove.c
…
rom.c
…
search.c
…
setup-bus.c
…
setup-irq.c
…
setup-res.c
…
slot.c
…
syscall.c
…
vc.c
…
vpd.c
…
xen-pcifront.c
…