linux-kernel - cpufreq kmemleak report

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Date:	Sun, 08 Jan 2012 14:26:11 +0000
From:	"Wouter M. Koolen" <wmkoolen@...ence.uva.nl>
To:	davej@...hat.com, cpufreq@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: cpufreq kmemleak report

Hi Dave,

I am running 3.2.0 with kmemleak enabled. I just observed the below 
reports, which seem cpufreq related.  I got the top one a couple of 
minutes after resuming from sleep (from ram), and the second about an 
hour later.

I am using acpi_cpufreq as a module.

Don't hesitate to ask for any other information that could be useful .

With kind regards,

Wouter Koolen



unreferenced object 0xffff880071ab9dc0 (size 32):
   comm "modprobe", pid 1955, jiffies 4294899715 (age 19825.880s)
   hex dump (first 32 bytes):
     63 70 75 66 72 65 71 00 5a 5a 5a 5a 5a 5a 5a 5a  cpufreq.ZZZZZZZZ
     5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a a5  ZZZZZZZZZZZZZZZ.
   backtrace:
     [<ffffffff813f91c1>] kmemleak_alloc+0x21/0x50
     [<ffffffff8111bdee>] __kmalloc_track_caller+0x12e/0x240
     [<ffffffff810f234d>] kstrdup+0x3d/0x70
     [<ffffffff81195a7c>] sysfs_new_dirent+0x2c/0x120
     [<ffffffff8119614d>] create_dir+0x3d/0xd0
     [<ffffffff8119627b>] sysfs_create_dir+0x7b/0xc0
     [<ffffffff811dbfd8>] kobject_add_internal+0xb8/0x210
     [<ffffffff811dc413>] kobject_init_and_add+0x63/0x90
     [<ffffffff8130d51a>] cpufreq_add_dev_interface+0x4a/0x370
     [<ffffffff8130dba8>] cpufreq_add_dev+0x368/0x5f0
     [<ffffffff812ed39e>] sysdev_driver_register+0xbe/0x150
     [<ffffffff8130cc7f>] cpufreq_register_driver+0x7f/0x1a0
     [<ffffffffa04d1082>] __hidp_copy_session+0x2/0x210 [hidp]
     [<ffffffff810001cb>] do_one_initcall+0x3b/0x170
     [<ffffffff8109074b>] sys_init_module+0xbb/0x230
     [<ffffffff81416e7b>] system_call_fastpath+0x16/0x1b


unreferenced object 0xffff880071a7d640 (size 176):
   comm "modprobe", pid 1955, jiffies 4294899715 (age 19825.880s)
   hex dump (first 32 bytes):
     01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
   backtrace:
     [<ffffffff813f91c1>] kmemleak_alloc+0x21/0x50
     [<ffffffff8111bbaa>] kmem_cache_alloc+0xda/0x1f0
     [<ffffffff81195a9c>] sysfs_new_dirent+0x4c/0x120
     [<ffffffff8119614d>] create_dir+0x3d/0xd0
     [<ffffffff8119627b>] sysfs_create_dir+0x7b/0xc0
     [<ffffffff811dbfd8>] kobject_add_internal+0xb8/0x210
     [<ffffffff811dc413>] kobject_init_and_add+0x63/0x90
     [<ffffffff8130d51a>] cpufreq_add_dev_interface+0x4a/0x370
     [<ffffffff8130dba8>] cpufreq_add_dev+0x368/0x5f0
     [<ffffffff812ed39e>] sysdev_driver_register+0xbe/0x150
     [<ffffffff8130cc7f>] cpufreq_register_driver+0x7f/0x1a0
     [<ffffffffa04d1082>] __hidp_copy_session+0x2/0x210 [hidp]
     [<ffffffff810001cb>] do_one_initcall+0x3b/0x170
     [<ffffffff8109074b>] sys_init_module+0xbb/0x230
     [<ffffffff81416e7b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff


View attachment "config-3.2.0.greg+" of type "text/plain" (74107 bytes)