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linux/drivers/spi/spi.c
Johan Hovold 9aacd82304 spi: fix use-after-free at controller deregistration 
commit 67f7b2781f upstream.

The controller is typically freed as part of device_unregister() so
store the bus id before deregistration to avoid use-after-free when the
id is later released.

Fixes: 9b61e30221 ("spi: Pick spi bus number from Linux idr or spi alias")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-21 09:49:24 +01:00

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