Juergen Gross d9d4ea17d6 xen/xenbus: ensure xenbus_map_ring_valloc() returns proper grant status ... [ Upstream commit 6b51fd3f65 ] xenbus_map_ring_valloc() maps a ring page and returns the status of the used grant (0 meaning success). There are Xen hypervisors which might return the value 1 for the status of a failed grant mapping due to a bug. Some callers of xenbus_map_ring_valloc() test for errors by testing the returned status to be less than zero, resulting in no error detected and crashing later due to a not available ring page. Set the return value of xenbus_map_ring_valloc() to GNTST_general_error in case the grant status reported by Xen is greater than zero. This is part of XSA-316. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Wei Liu <wl@xen.org> Link: https://lore.kernel.org/r/20200326080358.1018-1-jgross@suse.com Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-05-02 08:48:57 +02:00
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Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
xenbus.h	xenbus: Avoid deadlock during suspend due to open transactions	2019-05-28 17:32:15 -04:00
xenbus_client.c	xen/xenbus: ensure xenbus_map_ring_valloc() returns proper grant status	2020-05-02 08:48:57 +02:00
xenbus_comms.c	xenbus: req->err should be updated before req->state	2020-03-25 08:25:49 +01:00
xenbus_dev_backend.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
xenbus_dev_frontend.c	xen/xenbus: fix self-deadlock after killing user process	2019-10-02 16:40:11 -04:00
xenbus_probe.c	xen: export device state to sysfs	2018-08-28 17:37:40 -04:00
xenbus_probe_backend.c	xen: modify xenstore watch event interface	2017-02-09 11:26:49 -05:00
xenbus_probe_frontend.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
xenbus_xs.c	xenbus: req->body should be updated before req->state	2020-03-25 08:25:49 +01:00