Check that the packet is of the expected size at least, don't copy
data past the packet.
Reported-by: Saruhan Karademir <skarade@xxxxxxxxxxxxx>
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
---
Based on hyperv-next.
drivers/scsi/storvsc_drv.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 331a33a04f1ad..629a46a0bab6e 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -1270,6 +1270,11 @@ static void storvsc_on_channel_callback(void *context)
request = (struct storvsc_cmd_request *)(unsigned long)cmd_rqst;
+ if (hv_pkt_datalen(desc) < sizeof(struct vstor_packet) - vmscsi_size_delta) {
+ dev_err(&device->device, "Invalid packet len\n");
+ continue;
+ }
+
if (request == &stor_device->init_request ||
request == &stor_device->reset_request) {
memcpy(&request->vstor_packet, packet,
--
2.25.1
