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84eb186bc3
linux/drivers/char/tpm
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Hon Ching (Vicky) Lo 84eb186bc3 tpm: Fix NULL return in tpm_ibmvtpm_get_desired_dma 
There was an oops in tpm_ibmvtpm_get_desired_dma, which caused
kernel panic during boot when vTPM is enabled in Power partition
configured in AMS mode.

vio_bus_probe calls vio_cmo_bus_probe which calls
tpm_ibmvtpm_get_desired_dma to get the size needed for DMA allocation.
The problem is, vio_cmo_bus_probe is called before calling probe, which
for vtpm is tpm_ibmvtpm_probe and it's this function that initializes
and sets up vtpm's CRQ and gets required data values.  Therefore,
since this has not yet been done, NULL is returned in attempt to get
the size for DMA allocation.

We added a NULL check.  In addition, a default buffer size will
be set when NULL is returned.

Cc: <stable@vger.kernel.org>
Signed-off-by: Hon Ching (Vicky) Lo <honclo@linux.vnet.ibm.com>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
2015-01-17 14:00:06 +01:00
..
Kconfig Kconfig: rename HAS_IOPORT to HAS_IOPORT_MAP 2014-04-07 16:36:11 -07:00
Makefile tpm: Move sysfs functions from tpm-interface to tpm-sysfs 2014-01-06 14:37:24 +01:00
tpm_acpi.c ACPI: Clean up acpi_os_map/unmap_memory() to eliminate __iomem. 2014-05-27 18:13:08 +02:00
tpm_atmel.c char: tpm: drop owner assignment from platform_drivers 2014-10-20 16:20:21 +02:00
tpm_atmel.h
tpm_eventlog.c tpm: simplify code by using %*phN specifier 2014-07-29 23:10:56 +02:00
tpm_eventlog.h drivers/char/tpm: Add securityfs support for event log 2012-08-22 16:22:47 -05:00
tpm_i2c_atmel.c char: tpm: Add missing error check for devm_kzalloc 2015-01-17 14:00:05 +01:00
tpm_i2c_infineon.c drivers/char: delete non-required instances of include <linux/init.h> 2014-02-07 15:10:19 -08:00
tpm_i2c_nuvoton.c char: tpm: Add missing error check for devm_kzalloc 2015-01-17 14:00:05 +01:00
tpm_i2c_stm_st33.c tpm: Add missing tpm_do_selftest to ST33 I2C driver 2014-07-29 23:10:55 +02:00
tpm_i2c_stm_st33.h tpm_i2c_stm_st33: fix oops when i2c client is unavailable 2013-02-05 09:38:24 -06:00
tpm_ibmvtpm.c tpm: Fix NULL return in tpm_ibmvtpm_get_desired_dma 2015-01-17 14:00:06 +01:00
tpm_ibmvtpm.h drivers/char/tpm: remove tasklet and cleanup 2012-11-01 15:23:14 -05:00
tpm_infineon.c tpm: Create a tpm_class_ops structure and use it in the drivers 2014-01-06 14:37:25 +01:00
tpm_nsc.c char: tpm: drop owner assignment from platform_drivers 2014-10-20 16:20:21 +02:00
tpm_of.c drivers/char/tpm: Add securityfs support for event log 2012-08-22 16:22:47 -05:00
tpm_ppi.c ACPI / TPM: Fix resume regression on Chromebooks 2014-05-12 01:13:28 +02:00
tpm_tis.c tpm_tis: verify interrupt during init 2015-01-17 14:00:05 +01:00
tpm-dev.c tpm: Make tpm-dev allocate a per-file structure 2014-01-06 14:37:25 +01:00
tpm-interface.c TPM: Add new TPMs to the tail of the list to prevent inadvertent change of dev 2015-01-17 14:00:05 +01:00
tpm-sysfs.c tpm/tpm-sysfs: active_show() can be static 2014-01-06 14:37:25 +01:00
tpm.h tpm: Make tpm-dev allocate a per-file structure 2014-01-06 14:37:25 +01:00
xen-tpmfront.c xen: remove DEFINE_XENBUS_DRIVER() macro 2014-10-06 10:27:57 +01:00