Roger Pau Monné a7bc1af57e xen-blkback: only read request operation from shared ring once ... commit 1f13d75ccb806260079e0679d55d9253e370ec8a upstream. A compiler may load a switch statement value multiple times, which could be bad when the value is in memory shared with the frontend. When converting a non-native request to a native one, ensure that src->operation is only loaded once by using READ_ONCE(). This is part of XSA155. Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> [lizf: Backported to 3.4: - adjust context - call ACCESS_ONCE instead of READ_ONCE] Signed-off-by: Zefan Li <lizefan@huawei.com>		2016-10-26 23:15:39 +08:00
..
blkback.c	xen/blkback: Check for insane amounts of request on the ring (v6).	2014-03-11 16:10:07 -07:00
common.h	xen-blkback: only read request operation from shared ring once	2016-10-26 23:15:39 +08:00
Makefile
xenbus.c	xen/blkback: Check for insane amounts of request on the ring (v6).	2014-03-11 16:10:07 -07:00