Daniel Axtens 2c069a118f cxl: Check if afu is not null in cxl_slbia ... The pointer to an AFU in the adapter's list of AFUs can be null if we're in the process of removing AFUs. The afu_list_lock doesn't guard against this. Say we have 2 slices, and we're in the process of removing cxl. - We remove the AFUs in order (see cxl_remove). In cxl_remove_afu for AFU 0, we take the lock, set adapter->afu[0] = NULL, and release the lock. - Then we get an slbia. In cxl_slbia we take the lock, and set afu = adapter->afu[0], which is NULL. - Therefore our attempt to check afu->enabled will blow up. Therefore, check if afu is a null pointer before dereferencing it. Cc: stable@vger.kernel.org Signed-off-by: Daniel Axtens <dja@axtens.net> Acked-by: Michael Neuling <mikey@neuling.org> Acked-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2015-07-10 11:44:25 +10:00
..
api.c
base.c
context.c
cxl.h
debugfs.c
fault.c
file.c
irq.c
Kconfig
main.c	cxl: Check if afu is not null in cxl_slbia	2015-07-10 11:44:25 +10:00
Makefile
native.c
pci.c
sysfs.c
trace.c
trace.h
vphb.c