linux-kernel - Re: kmemleak in apei_res

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Message-ID: <20130821134455.GC12595@sanechka.spb.ru>
Date:	Wed, 21 Aug 2013 17:44:57 +0400
From:	"Alexandra N. Kossovsky" <Alexandra.Kossovsky@...etlabs.ru>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	Len Brown <lenb@...nel.org>, "Rafael J. Wysocki" <rjw@...k.pl>,
	linux-acpi@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Huang Ying <ying.huang@...el.com>
Subject: Re: kmemleak in apei_res_add

On Aug 21 10:38, Catalin Marinas wrote:
> On 12 August 2013 03:45, Alexandra N. Kossovsky
> <Alexandra.Kossovsky@...etlabs.ru> wrote:
> > When running 3.10.3 with kmemleak enabled, I see following warnings from
> > kmemleak:
> >
> > unreferenced object 0xffff88024d2219a0 (size 32):
> >   comm "swapper/0", pid 1, jiffies 4294894532 (age 26865.180s)
> >   hex dump (first 32 bytes):
> >     58 de 0c 73 02 88 ff ff 58 de 0c 73 02 88 ff ff  X..s....X..s....
> >     18 50 fd 7d 00 00 00 00 3f 50 fd 7d 00 00 00 00  .P.}....?P.}....
> >   backtrace:
> >     [<ffffffff813ddf40>] kmemleak_alloc+0x21/0x3e
> >     [<ffffffff8111cb99>] kmemleak_alloc_recursive.constprop.58+0x16/0x18
> >     [<ffffffff8111efac>] kmem_cache_alloc_trace+0xe6/0x12f
> >     [<ffffffff81278f0e>] apei_res_add+0xb9/0xe8
> >     [<ffffffff81278faa>] collect_res_callback+0x6d/0x7c
> >     [<ffffffff812788ed>] apei_exec_for_each_entry+0x78/0x93
> >     [<ffffffff8127891d>] apei_exec_collect_resources+0x15/0x17
> >     [<ffffffff81b010e5>] erst_init+0x278/0x2a3
> >     [<ffffffff810020b5>] do_one_initcall+0x7b/0x116
> >     [<ffffffff81ac9ee7>] kernel_init_freeable+0x13f/0x1cc
> >     [<ffffffff813db19f>] kernel_init+0x9/0xd6
> >     [<ffffffff813fe5bc>] ret_from_fork+0x7c/0xb0
> >     [<ffffffffffffffff>] 0xffffffffffffffff
> 
> Are there any "APEI:" errors in the kernel log? It could be some
> freeing missing on an error path.

No.
dmesg |grep APEI
[    9.602274] GHES: APEI firmware first mode is enabled by APEI bit and WHEA _OSC.


-- 
Alexandra N. Kossovsky
OKTET Labs (http://www.oktetlabs.ru/)
e-mail: sasha@...etlabs.ru
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