[PATCH] leds: netxbig: fix oops at probe time

[Bryan Wu]

On Thu, Dec 11, 2014 at 1:04 AM, Simon Guinot <simon.guinot at sequanux.org> 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 at sequanux.org>
>> Cc: <stable at 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.
>
> Thanks.
>
> Simon

Sorry for the delay. I will merge it.

-Bryan