Andrew Donnellan 14a3ae34bf cxl: Prevent read/write to AFU config space while AFU not configured ...

During EEH recovery, we deconfigure all AFUs whilst leaving the
corresponding vPHB and virtual PCI device in place.

If something attempts to interact with the AFU's PCI config space (e.g.
running lspci) after the AFU has been deconfigured and before it's
reconfigured, cxl_pcie_{read,write}_config() will read invalid values from
the deconfigured struct cxl_afu and proceed to Oops when they try to
dereference pointers that have been set to NULL during deconfiguration.

Add a rwsem to struct cxl_afu so we can prevent interaction with config
space while the AFU is deconfigured.

Reported-by: Pradipta Ghosh <pradghos@in.ibm.com>
Suggested-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org # v4.9+
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

2017-01-25 13:34:24 +11:00

..

api.c

cxl: Drop unused header asm/pnv-pci.h

2017-01-25 13:34:23 +11:00

base.c

cxl: Add support for interrupts on the Mellanox CX4

2016-07-14 20:27:08 +10:00

context.c

powerpc updates for 4.10

2016-12-16 09:26:42 -08:00

cxl.h

cxl: Prevent read/write to AFU config space while AFU not configured

2017-01-25 13:34:24 +11:00

debugfs.c

cxl: Fix coccinelle warnings

2016-11-23 22:57:49 +11:00

fault.c

powerpc/mm: Replace _PAGE_USER with _PAGE_PRIVILEGED

2016-05-01 18:32:26 +10:00

file.c

cxl: Fix coredump generation when cxl_get_fd() is used

2016-11-18 23:02:17 +11:00

flash.c

cxl: static-ify variables to fix sparse warnings

2016-06-16 22:49:27 +10:00

guest.c

cxl: Fix coccinelle warnings

2016-11-23 22:57:49 +11:00

hcalls.c

cxl: Add tracepoints around the cxl hcall

2016-03-09 23:40:01 +11:00

hcalls.h

cxl: Add guest-specific code

2016-03-09 23:36:52 +11:00

irq.c

cxl: Fix coccinelle warnings

2016-11-23 22:57:49 +11:00

Kconfig

cxl: remove dead Kconfig options

2016-07-19 20:12:29 +10:00

main.c

cxl: Prevent read/write to AFU config space while AFU not configured

2017-01-25 13:34:24 +11:00

Makefile

cxl: Allow a default context to be associated with an external pci_dev

2016-07-14 20:26:52 +10:00

native.c

cxl: drop duplicate header sched.h

2016-11-25 14:07:50 +11:00

of.c

cxl: replace loop with for_each_child_of_node(), remove unneeded of_node_put()

2016-10-04 16:19:23 +11:00

pci.c

cxl: Prevent read/write to AFU config space while AFU not configured

2017-01-25 13:34:24 +11:00

phb.c

cxl: Fix error handling in _cxl_pci_associate_default_context()

2016-11-18 22:41:08 +11:00

sysfs.c

cxl: Prevent adapter reset if an active context exists

2016-10-19 20:35:39 +11:00

trace.c

cxl: Add tracepoints

2015-01-22 17:31:51 +11:00

trace.h

cxl: Add tracepoints around the cxl hcall

2016-03-09 23:40:01 +11:00

vphb.c

cxl: Prevent read/write to AFU config space while AFU not configured

2017-01-25 13:34:24 +11:00