From: Andrea Parri (Microsoft) <parri.andrea@xxxxxxxxx> Sent: Monday, September 7, 2020 9:19 AM > > From: Andres Beltran <lkmlabelt@xxxxxxxxx> > > Currently, pointers to guest memory are passed to Hyper-V as > transaction IDs in storvsc. In the face of errors or malicious > behavior in Hyper-V, storvsc should not expose or trust the transaction > IDs returned by Hyper-V to be valid guest memory addresses. Instead, > use small integers generated by vmbus_requestor as requests > (transaction) IDs. > > Signed-off-by: Andres Beltran <lkmlabelt@xxxxxxxxx> > Co-developed-by: Andrea Parri (Microsoft) <parri.andrea@xxxxxxxxx> > Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@xxxxxxxxx> > Cc: "James E.J. Bottomley" <jejb@xxxxxxxxxxxxx> > Cc: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx> > Cc: linux-scsi@xxxxxxxxxxxxxxx > --- > Changes in v7: > - Move the allocation of the request ID after the data has been > copied into the ring buffer (cf. 1/3). > Changes in v2: > - Add casts to unsigned long to fix warnings on 32bit. > > drivers/scsi/storvsc_drv.c | 26 +++++++++++++++++++++++--- > 1 file changed, 23 insertions(+), 3 deletions(-) > Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
