Stefan Haberland 7411c05a6e s390/dasd: fix null pointer dereference for ERP requests ... commit 6f117cb854 upstream. When requeueing all requests on the device request queue to the blocklayer we might get to an ERP (error recovery) request that is a copy of an original CQR. Those requests do not have blocklayer request information or a pointer to the dasd_queue set. When trying to access those data it will lead to a null pointer dereference in dasd_requeue_all_requests(). Fix by checking if the request is an ERP request that can simply be ignored. The blocklayer request will be requeued by the original CQR that is on the device queue right behind the ERP request. Fixes: 9487cfd343 ("s390/dasd: fix handling of internal requests") Cc: <stable@vger.kernel.org> #4.16 Signed-off-by: Stefan Haberland <sth@linux.ibm.com> Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-11-24 13:29:23 +01:00
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block	s390/dasd: fix null pointer dereference for ERP requests	2020-11-24 13:29:23 +01:00
char	s390 updates for the 5.4 merge window	2019-09-17 14:04:43 -07:00
cio	s390/irq: replace setup_irq() by request_irq()	2020-10-01 13:17:40 +02:00
crypto	s390/pkey: fix paes selftest failure with paes and pkey static build	2020-11-10 12:37:32 +01:00
net	s390/qeth: don't let HW override the configured port role	2020-10-29 09:58:10 +01:00
scsi	scsi: zfcp: Fix use-after-free in request timeout handlers	2020-08-26 10:40:52 +02:00
virtio	virtio/s390: fix race on airq_areas[]	2019-07-26 13:36:18 +02:00
Makefile	s390: remove pointless drivers-y in drivers/s390/Makefile	2019-09-16 13:21:51 +02:00