Julian Wiedmann 292a50e3fc s390/qeth: reject oversized SNMP requests ... Commit d4c08afafa ("s390/qeth: streamline SNMP cmd code") removed the bounds checking for req_len, under the assumption that the check in qeth_alloc_cmd() would suffice. But that code path isn't sufficiently robust to handle a user-provided data_length, which could overflow (when adding the cmd header overhead) before being checked against QETH_BUFSIZE. We end up allocating just a tiny iob, and the subsequent copy_from_user() writes past the end of that iob. Special-case this path and add a coarse bounds check, to protect against maliciuous requests. This let's the subsequent code flow do its normal job and precise checking, without risk of overflow. Fixes: d4c08afafa ("s390/qeth: streamline SNMP cmd code") Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2019-08-24 16:34:08 -07:00
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block	s390/dasd: fix endless loop after read unit address configuration	2019-08-01 20:46:14 -06:00
char	s390/3215: add switch fall through comment for -Wimplicit-fallthrough	2019-07-29 18:05:03 +02:00
cio	vfio-ccw: make vfio_ccw_async_region_ops static	2019-07-29 18:05:03 +02:00
crypto	s390/zcrypt: adjust switch fall through comments for -Wimplicit-fallthrough	2019-08-02 13:58:23 +02:00
net	s390/qeth: reject oversized SNMP requests	2019-08-24 16:34:08 -07:00
scsi	SCSI fixes on 20190720	2019-07-20 10:04:58 -07:00
virtio	virtio/s390: fix race on airq_areas[]	2019-07-26 13:36:18 +02:00
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