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").
Ouch.
> Signed-off-by: Simon Guinot <[email protected]>
> Cc: <[email protected]> # 3.17+
Acked-by: Johan Hovold <[email protected]>
Thanks,
Johan
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