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android_kernel_motorola_sm6375/drivers/base
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Repository files (latest commit first)
Filename Latest commit message Latest commit date
Alex Williamson bb34cb6bbd driver core: Fix unbalanced device reference in drivers_probe 
bus_find_device_by_name() acquires a device reference which is never
released.  This results in an object leak, which on older kernels
results in failure to release all resources of PCI devices.  libvirt
uses drivers_probe to re-attach devices to the host after assignment
and is therefore a common trigger for this leak.

Example:

# cd /sys/bus/pci/
# dmesg -C
# echo 1 > devices/0000\:01\:00.0/sriov_numvfs
# echo 0 > devices/0000\:01\:00.0/sriov_numvfs
# dmesg | grep 01:10
 pci 0000:01:10.0: [8086:10ca] type 00 class 0x020000
 kobject: '0000:01:10.0' (ffff8801d79cd0a8): kobject_add_internal: parent: '0000:00:01.0', set: 'devices'
 kobject: '0000:01:10.0' (ffff8801d79cd0a8): kobject_uevent_env
 kobject: '0000:01:10.0' (ffff8801d79cd0a8): fill_kobj_path: path = '/devices/pci0000:00/0000:00:01.0/0000:01:10.0'
 kobject: '0000:01:10.0' (ffff8801d79cd0a8): kobject_uevent_env
 kobject: '0000:01:10.0' (ffff8801d79cd0a8): fill_kobj_path: path = '/devices/pci0000:00/0000:00:01.0/0000:01:10.0'
 kobject: '0000:01:10.0' (ffff8801d79cd0a8): kobject_uevent_env
 kobject: '0000:01:10.0' (ffff8801d79cd0a8): fill_kobj_path: path = '/devices/pci0000:00/0000:00:01.0/0000:01:10.0'
 kobject: '0000:01:10.0' (ffff8801d79cd0a8): kobject_cleanup, parent           (null)
 kobject: '0000:01:10.0' (ffff8801d79cd0a8): calling ktype release
 kobject: '0000:01:10.0': free name

[kobject freed as expected]

# dmesg -C
# echo 1 > devices/0000\:01\:00.0/sriov_numvfs
# echo 0000:01:10.0 > drivers_probe
# echo 0 > devices/0000\:01\:00.0/sriov_numvfs
# dmesg | grep 01:10
 pci 0000:01:10.0: [8086:10ca] type 00 class 0x020000
 kobject: '0000:01:10.0' (ffff8801d79ce0a8): kobject_add_internal: parent: '0000:00:01.0', set: 'devices'
 kobject: '0000:01:10.0' (ffff8801d79ce0a8): kobject_uevent_env
 kobject: '0000:01:10.0' (ffff8801d79ce0a8): fill_kobj_path: path = '/devices/pci0000:00/0000:00:01.0/0000:01:10.0'
 kobject: '0000:01:10.0' (ffff8801d79ce0a8): kobject_uevent_env
 kobject: '0000:01:10.0' (ffff8801d79ce0a8): fill_kobj_path: path = '/devices/pci0000:00/0000:00:01.0/0000:01:10.0'
 kobject: '0000:01:10.0' (ffff8801d79ce0a8): kobject_uevent_env
 kobject: '0000:01:10.0' (ffff8801d79ce0a8): fill_kobj_path: path = '/devices/pci0000:00/0000:00:01.0/0000:01:10.0'

[no free]

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-07 11:24:01 -08:00
..
power PM / Sleep: fix async suspend_late/freeze_late error handling 2014-10-27 18:42:26 +01:00
regmap Merge remote-tracking branch 'regmap/topic/cache' into regmap-next 2014-09-29 20:49:42 +01:00
attribute_container.c attribute_container: fix coding style issues 2014-09-23 22:55:15 -07:00
base.h driver core: Move driver_data back to struct device 2014-05-27 12:37:18 -07:00
bus.c driver core: Fix unbalanced device reference in drivers_probe 2014-11-07 11:24:01 -08:00
class.c sysfs: make attr namespace interface less convoluted 2013-09-26 14:50:01 -07:00
component.c component: fix bug with legacy API 2014-07-04 18:05:05 +01:00
container.c ACPI / hotplug / driver core: Handle containers in a special way 2013-12-29 15:25:48 +01:00
core.c IOMMU Updates for Linux v3.18 2014-10-15 07:23:49 +02:00
cpu.c x86: align x86 arch with generic CPU modalias handling 2014-02-18 12:45:38 -08:00
dd.c driver core: Remove kerneldoc from local function 2014-09-23 23:10:11 -07:00
devcoredump.c device coredump: add new device coredump class 2014-09-23 22:53:15 -07:00
devres.c devres: Improve devm_kasprintf()/kvasprintf() support 2014-09-23 23:32:50 -07:00
devtmpfs.c devtmpfs: Calling delete_path() only when necessary 2013-12-19 10:10:32 -08:00
dma-coherent.c drivers: dma-coherent: add initialization from device tree 2014-10-14 02:18:12 +02:00
dma-contiguous.c drivers: of: add return value to of_reserved_mem_device_init() 2014-10-29 16:33:14 -07:00
dma-mapping.c common: dma-mapping: introduce common remapping functions 2014-10-09 22:25:52 -04:00
driver.c driver core: add #include <linux/sysfs.h> to core files. 2013-08-27 10:24:15 -07:00
firmware.c
firmware_class.c firmware_class: make sure fw requests contain a name 2014-09-23 23:26:58 -07:00
hypervisor.c
init.c ACPI / hotplug / driver core: Handle containers in a special way 2013-12-29 15:25:48 +01:00
isa.c
Kconfig CMA: document cma=0 2014-10-09 22:26:02 -04:00
Makefile device coredump: add new device coredump class 2014-09-23 22:53:15 -07:00
map.c
memory.c memory-hotplug: add sysfs valid_zones attribute 2014-10-09 22:25:52 -04:00
module.c
node.c mm: remove noisy remainder of the scan_unevictable interface 2014-10-09 22:25:55 -04:00
pinctrl.c drivers: pinctrl sleep and idle states in the core 2013-06-16 11:56:52 +02:00
platform.c PM / Domains: Move dev_pm_domain_attach|detach() to pm_domain.h 2014-09-30 01:16:44 +02:00
soc.c
syscore.c genirq: Simplify wakeup mechanism 2014-09-01 13:48:59 +02:00
topology.c topology: Fix compilation warning when not in SMP 2014-04-16 14:13:26 -07:00
transport_class.c