s390/qeth: remove unused buffer->aob pointer

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Except for tracing, the pointer is not used.

At the same time, accessing it from qeth_qdio_output_handler() is racy:
whenever qeth_qdio_cq_handler() gets control, its call to
qeth_qdio_handle_aob() frees the AOB.

So the AOB pointer that qeth_qdio_output_handler() stores into 'buffer'
can go stale at any time, and trigger a use-after-free.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

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Julian Wiedmann 2018-07-11 17:42:39 +02:00 • committed by David S. Miller

parent 3b346c1814

commit f67a43a73b

2 changed files with 0 additions and 8 deletions

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1

drivers/s390/net/qeth_core.h

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7

drivers/s390/net/qeth_core_main.c

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