linux/kernel/power
Masami Ichikawa c606850407 PM / sleep: Fix memory leak in pm_vt_switch_unregister().
kmemleak reported a memory leak as below.

unreferenced object 0xffff880118f14700 (size 32):
  comm "swapper/0", pid 1, jiffies 4294877401 (age 123.283s)
  hex dump (first 32 bytes):
    00 01 10 00 00 00 ad de 00 02 20 00 00 00 ad de  .......... .....
    00 d4 d2 18 01 88 ff ff 01 00 00 00 00 04 00 00  ................
  backtrace:
    [<ffffffff814edb1e>] kmemleak_alloc+0x4e/0xb0
    [<ffffffff811889dc>] kmem_cache_alloc_trace+0x1ec/0x260
    [<ffffffff810aba66>] pm_vt_switch_required+0x76/0xb0
    [<ffffffff812f39f5>] register_framebuffer+0x195/0x320
    [<ffffffff8130af18>] efifb_probe+0x718/0x780
    [<ffffffff81391495>] platform_drv_probe+0x45/0xb0
    [<ffffffff8138f407>] driver_probe_device+0x87/0x3a0
    [<ffffffff8138f7f3>] __driver_attach+0x93/0xa0
    [<ffffffff8138d413>] bus_for_each_dev+0x63/0xa0
    [<ffffffff8138ee5e>] driver_attach+0x1e/0x20
    [<ffffffff8138ea40>] bus_add_driver+0x180/0x250
    [<ffffffff8138fe74>] driver_register+0x64/0xf0
    [<ffffffff813913ba>] __platform_driver_register+0x4a/0x50
    [<ffffffff8191e028>] efifb_driver_init+0x12/0x14
    [<ffffffff8100214a>] do_one_initcall+0xfa/0x1b0
    [<ffffffff818e40e0>] kernel_init_freeable+0x17b/0x201

In pm_vt_switch_required(), "entry" variable is allocated via kmalloc().
So, in pm_vt_switch_unregister(), it needs to call kfree() when object
is deleted from list.

Signed-off-by: Masami Ichikawa <masami256@gmail.com>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-22 00:56:35 +01:00
..
Kconfig PM / Sleep: Detect device suspend/resume lockup and log event 2013-10-18 13:33:08 +02:00
Makefile PM / Sleep: Add user space interface for manipulating wakeup sources, v3 2012-05-01 21:26:05 +02:00
autosleep.c PM / Sleep: avoid 'autosleep' in shutdown progress 2013-07-15 01:31:37 +02:00
block_io.c block: kill off REQ_UNPLUG 2011-03-10 08:52:27 +01:00
console.c PM / sleep: Fix memory leak in pm_vt_switch_unregister(). 2013-12-22 00:56:35 +01:00
hibernate.c PM / hibernate: Move software_resume to late_initcall_sync 2013-10-25 01:58:49 +02:00
main.c PM / Sleep: Warn about system time after resume with pm_trace 2013-06-27 22:14:46 +02:00
power.h PM / Hibernate: Enable suspend to both for in-kernel hibernation. 2012-07-01 13:31:22 +02:00
poweroff.c power/sysrq: fix inconstistent help message of sysrq key 2013-04-30 17:04:10 -07:00
process.c freezer: set PF_SUSPEND_TASK flag on tasks that call freeze_processes 2013-07-30 14:05:06 +02:00
qos.c PM / QoS: simplify pm_qos_power_write() 2013-10-17 22:52:20 +02:00
snapshot.c Merge branch 'pm-sleep' 2013-11-19 01:07:08 +01:00
suspend.c PM / Sleep: increase ftrace coverage in suspend/resume 2013-07-26 00:49:07 +02:00
suspend_test.c driver-core: constify data for class_find_device() 2013-02-06 12:18:56 -08:00
swap.c PM / Hibernate: use rb_entry 2012-11-15 00:37:08 +01:00
user.c Merge branch 'pm-sleep' 2013-11-19 01:07:08 +01:00
wakelock.c PM / Sleep: Require CAP_BLOCK_SUSPEND to use wake_lock/wake_unlock 2012-07-19 00:00:58 +02:00