Steven Rostedt ac3abf2c37 PCI hotplug: ibmphp: Add check to prevent reading beyond mapped area ... While testing various randconfigs with ktest.pl, I hit the following panic: BUG: unable to handle kernel paging request at f7e54b03 IP: [<c0d63409>] ibmphp_access_ebda+0x101/0x19bb Adding printks, I found that the loop that reads the ebda blocks can move out of the mapped section. ibmphp_access_ebda: start=f7e44c00 size=5120 end=f7e46000 ibmphp_access_ebda: io_mem=f7e44d80 offset=384 ibmphp_access_ebda: io_mem=f7e54b03 offset=65283 The start of the iomap was at f7e44c00 and had a size of 5120, making the end f7e46000. We start with an offset of 0x180 or 384, giving the first read at 0xf7e44d80. Reading that location yields 65283, which is much bigger than the 5120 that was allocated and makes the next read at f7e54b03 which is outside the mapped area. Perhaps this is a bug in the driver, or buggy hardware, but this patch is more about not crashing my box on start up and just giving a warning if it detects this error. This patch at least lets my box boot with just a warning. Cc: Chandru Siddalingappa <chandru@linux.vnet.ibm.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>		2010-11-11 09:34:31 -08:00
..
acpi_pcihp.c	PCI: PCIe: Ask BIOS for control of all native services at once	2010-08-24 13:47:33 -07:00
acpiphp_core.c
acpiphp_glue.c
acpiphp_ibm.c	sysfs: add struct file* to bin_attr callbacks	2010-05-21 09:37:31 -07:00
acpiphp.h
cpci_hotplug_core.c
cpci_hotplug_pci.c
cpci_hotplug.h
cpcihp_generic.c
cpcihp_zt5550.c
cpcihp_zt5550.h
cpqphp_core.c	PCI: hotplug/cpqphp, fix NULL dereference	2010-06-11 13:10:21 -07:00
cpqphp_ctrl.c
cpqphp_nvram.c
cpqphp_nvram.h
cpqphp_pci.c
cpqphp_sysfs.c	drivers: autoconvert trivial BKL users to private mutex	2010-10-05 15:01:04 +02:00
cpqphp.h
fakephp.c	PCI: use for_each_pci_dev()	2010-07-30 09:47:22 -07:00
ibmphp_core.c
ibmphp_ebda.c	PCI hotplug: ibmphp: Add check to prevent reading beyond mapped area	2010-11-11 09:34:31 -08:00
ibmphp_hpc.c	PCI hotplug: ibmphp-hpc: semaphore cleanup	2010-10-15 13:09:48 -07:00
ibmphp_pci.c
ibmphp_res.c
ibmphp.h
Kconfig
Makefile
pci_hotplug_core.c
pciehp_acpi.c	PCI: PCIe: Ask BIOS for control of all native services at once	2010-08-24 13:47:33 -07:00
pciehp_core.c	pciehp: update workqueue usage	2010-10-18 08:31:02 +02:00
pciehp_ctrl.c	pciehp: update workqueue usage	2010-10-18 08:31:02 +02:00
pciehp_hpc.c	pciehp: update workqueue usage	2010-10-18 08:31:02 +02:00
pciehp_pci.c	PCI hotplug: pciehp: Fixed return value sign for pciehp_unconfigure_device	2010-07-30 09:29:15 -07:00
pciehp.h	pciehp: update workqueue usage	2010-10-18 08:31:02 +02:00
pcihp_skeleton.c
pcihp_slot.c
rpadlpar_core.c
rpadlpar_sysfs.c
rpadlpar.h
rpaphp_core.c
rpaphp_pci.c
rpaphp_slot.c
rpaphp.h
sgi_hotplug.c
shpchp_core.c	shpchp: update workqueue usage	2010-10-18 08:33:02 +02:00
shpchp_ctrl.c	shpchp: update workqueue usage	2010-10-18 08:33:02 +02:00
shpchp_hpc.c	shpchp: update workqueue usage	2010-10-18 08:33:02 +02:00
shpchp_pci.c	PCI hotplug: shpchp: Removed check for hotplug of display devices	2010-07-30 09:29:16 -07:00
shpchp_sysfs.c
shpchp.h	shpchp: update workqueue usage	2010-10-18 08:33:02 +02:00