From mboxrd@z Thu Jan  1 00:00:00 1970
From: simon.guinot@sequanux.org (Simon Guinot)
Date: Mon, 22 Dec 2014 12:57:37 +0100
Subject: [PATCH] leds: netxbig: fix oops at probe time
In-Reply-To: <20141211090400.GB18449@kw.sim.vm.gnt>
References: <1417534330-13154-1-git-send-email-simon.guinot@sequanux.org>
 <20141211090400.GB18449@kw.sim.vm.gnt>
Message-ID: <20141222115737.GL19261@kw.sim.vm.gnt>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Thu, Dec 11, 2014 at 10:04:00AM +0100, Simon Guinot wrote:
> On Tue, Dec 02, 2014 at 04:32:10PM +0100, Simon Guinot wrote:
> > This patch fixes a NULL pointer dereference on led_dat->mode_val. Due to
> > this bug, a kernel oops can be observed at probe time on the LaCie 2Big
> > and 5Big v2 boards:
> > 
> > Unable to handle kernel NULL pointer dereference at virtual address 00000008
> > [...]
> > [<c03f244c>] (netxbig_led_probe) from [<c02c8c6c>] (platform_drv_probe+0x4c/0x9c)
> > [<c02c8c6c>] (platform_drv_probe) from [<c02c72d0>] (driver_probe_device+0x98/0x25c)
> > [<c02c72d0>] (driver_probe_device) from [<c02c7520>] (__driver_attach+0x8c/0x90)
> > [<c02c7520>] (__driver_attach) from [<c02c5c24>] (bus_for_each_dev+0x68/0x94)
> > [<c02c5c24>] (bus_for_each_dev) from [<c02c6408>] (bus_add_driver+0x124/0x1dc)
> > [<c02c6408>] (bus_add_driver) from [<c02c7ac0>] (driver_register+0x78/0xf8)
> > [<c02c7ac0>] (driver_register) from [<c000888c>] (do_one_initcall+0x80/0x1cc)
> > [<c000888c>] (do_one_initcall) from [<c0733618>] (kernel_init_freeable+0xe4/0x1b4)
> > [<c0733618>] (kernel_init_freeable) from [<c058db9c>] (kernel_init+0xc/0xec)
> > [<c058db9c>] (kernel_init) from [<c0009850>] (ret_from_fork+0x14/0x24)
> > [...]
> > 
> > This bug was introduced by commit 588a6a99286ae30afb1339d8bc2163517b1b7dd1
> > ("leds: netxbig: fix attribute-creation race").
> > 
> > Signed-off-by: Simon Guinot <simon.guinot@sequanux.org>
> > Cc: <stable@vger.kernel.org> # 3.17+
> > ---
> >  drivers/leds/leds-netxbig.c | 12 ++++++------
> >  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> Hi Bryan,
> 
> Please apply up this patch.

Hi Bryan,

Is there any news about this patch on your side ?

Jason, Andrew, Sebastian,

Maybe this patch can go through the SoC branch ?

Thanks in advance.

Simon
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