linux-kernel - Re: [PATCH] PCI: fix memleak when ACPI

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Date:	Thu, 23 Feb 2012 08:27:03 -0800
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: fix memleak when ACPI _CRS is not used.

On Mon, 20 Feb 2012 17:23:47 -0800
Yinghai Lu <yinghai@...nel.org> wrote:

> got warning:
> unreferenced object 0xffff8801f6914200 (size 512):
>   comm "swapper/0", pid 1, jiffies 4294893643 (age 2664.644s)
>   hex dump (first 32 bytes):
>     00 00 c0 fe 00 00 00 00 ff ff ff ff 00 00 00 00  ................
>     60 58 2f f6 03 88 ff ff 00 02 00 00 00 00 00 00  `X/.............
>   backtrace:
>     [<ffffffff81c2408c>] kmemleak_alloc+0x26/0x43
>     [<ffffffff8113764f>] __kmalloc+0x121/0x183
>     [<ffffffff81ca8d93>] get_current_resources+0x5a/0xc6
>     [<ffffffff81c5bedd>] pci_acpi_scan_root+0x13c/0x21c
>     [<ffffffff81c2a745>] acpi_pci_root_add+0x1e1/0x421
>     [<ffffffff81408f50>] acpi_device_probe+0x50/0x190
>     [<ffffffff8149edc7>] really_probe+0x99/0x126
>     [<ffffffff8149ef83>] driver_probe_device+0x3b/0x56
>     [<ffffffff8149effd>] __driver_attach+0x5f/0x82
>     [<ffffffff8149d860>] bus_for_each_dev+0x5c/0x88
>     [<ffffffff8149eb87>] driver_attach+0x1e/0x20
>     [<ffffffff8149e7cc>] bus_add_driver+0xca/0x21d
>     [<ffffffff8149f47b>] driver_register+0x91/0xfe
>     [<ffffffff81409d09>] acpi_bus_register_driver+0x43/0x45
>     [<ffffffff8278bdc9>] acpi_pci_root_init+0x20/0x28
>     [<ffffffff810001e7>] do_one_initcall+0x57/0x134
> 
> The system have _CRS for root buses, but they are not used because is old...
> 
> Try free those not used resource array and name.
> 
> Signed-off-by: Yinghai Lu <yinghai@...nel.org>

Applied to for-linus, thanks.

-- 
Jesse Barnes, Intel Open Source Technology Center

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