This is a note to let you know that I've just added the patch titled

staging: greybus: spilib: fix use-after-free after deregistration

to the 4.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: staging-greybus-spilib-fix-use-after-free-after-deregistration.patch and it can be found in the queue-4.13 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 770b03c2ca4aa44d226cf248f86aa23e546147d0 Mon Sep 17 00:00:00 2001

From: Johan Hovold johan@kernel.org Date: Sun, 29 Oct 2017 13:01:33 +0100 Subject: staging: greybus: spilib: fix use-after-free after deregistration

From: Johan Hovold johan@kernel.org

commit 770b03c2ca4aa44d226cf248f86aa23e546147d0 upstream.

Remove erroneous spi_master_put() after controller deregistration which would access the already freed spi controller.

Note that spi_unregister_master() drops our only controller reference.

Fixes: ba3e67001b42 ("greybus: SPI: convert to a gpbridge driver") Signed-off-by: Johan Hovold johan@kernel.org Reviewed-by: Rui Miguel Silva rmfrfs@gmail.com Acked-by: Viresh Kumar viresh.kumar@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/staging/greybus/spilib.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/drivers/staging/greybus/spilib.c +++ b/drivers/staging/greybus/spilib.c @@ -544,12 +544,15 @@ int gb_spilib_master_init(struct gb_conn

return 0;

-exit_spi_unregister: - spi_unregister_master(master); exit_spi_put: spi_master_put(master);

return ret; + +exit_spi_unregister: + spi_unregister_master(master); + + return ret; } EXPORT_SYMBOL_GPL(gb_spilib_master_init);

@@ -558,7 +561,6 @@ void gb_spilib_master_exit(struct gb_con struct spi_master *master = gb_connection_get_data(connection);

spi_unregister_master(master); - spi_master_put(master); } EXPORT_SYMBOL_GPL(gb_spilib_master_exit);

Patches currently in stable-queue which might be from johan@kernel.org are

queue-4.13/usb-serial-qcserial-add-pid-vid-for-sierra-wireless-em7355-fw-update.patch queue-4.13/staging-greybus-spilib-fix-use-after-free-after-deregistration.patch queue-4.13/usb-serial-metro-usb-stop-i-o-after-failed-open.patch queue-4.13/usb-serial-change-dbc-debug-device-binding-id.patch queue-4.13/usb-serial-garmin_gps-fix-i-o-after-failed-probe-and-remove.patch queue-4.13/usb-serial-garmin_gps-fix-memory-leak-on-probe-errors.patch