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s390/qeth: cancel close_dev work before removing a card
authorJulian Wiedmann <jwi@linux.ibm.com>
Mon, 4 Feb 2019 16:40:08 +0000 (17:40 +0100)
committerDavid S. Miller <davem@davemloft.net>
Mon, 4 Feb 2019 17:43:48 +0000 (09:43 -0800)
commitc2780c1a3fb724560b1d44f7976e0de17bf153c7
tree8bce72a80aa2dc351876306d3426cec58d9afd19
parentafa0c5904ba16d59b0454f7ee4c807dae350f432
s390/qeth: cancel close_dev work before removing a card

A card's close_dev work is scheduled on a driver-wide workqueue. If the
card is removed and freed while the work is still active, this causes a
use-after-free.
So make sure that the work is completed before freeing the card.

Fixes: 0f54761d167f ("qeth: Support VEPA mode")
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/s390/net/qeth_core.h
drivers/s390/net/qeth_l2_main.c
drivers/s390/net/qeth_l3_main.c