w1: don't leak refcount on slave attach failure in w1_attach_slave_device()
authorMaciej S. Szmigiero <mail@maciej.szmigiero.name>
Sat, 21 Jan 2017 22:50:18 +0000 (23:50 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 25 Jan 2017 10:46:42 +0000 (11:46 +0100)
commitd2ce4ea1a0b0162e5d2d7e7942ab6f5cc2063d5a
treee0473fe2c0aefd9191655f18f52217ec5fd09428
parentdd6478d68b16ce3d165b9d0e4ac0c021923e0f5a
w1: don't leak refcount on slave attach failure in w1_attach_slave_device()

Near the beginning of w1_attach_slave_device() we increment a w1 master
reference count.
Later, when we are going to exit this function without actually attaching
a slave device (due to failure of __w1_attach_slave_device()) we need to
decrement this reference count back.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Cc: stable@vger.kernel.org
Fixes: 9fcbbac5ded489 ("w1: process w1 netlink commands in w1_process thread")
Cc: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/w1/w1.c