6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Finn Thain <fthain@xxxxxxxxxxxxxx> [ Upstream commit 1c71065df2df693d208dd32758171c1dece66341 ] Following an incomplete transfer in MSG IN phase, the driver would not notice the problem and would make use of invalid data. Initialize 'tmp' appropriately and bail out if no message was received. For STATUS phase, preserve the existing status code unless a new value was transferred. Tested-by: Stan Johnson <userm57@xxxxxxxxx> Signed-off-by: Finn Thain <fthain@xxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/52e02a8812ae1a2d810d7f9f7fd800c3ccc320c4.1723001788.git.fthain@xxxxxxxxxxxxxx Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/scsi/NCR5380.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c index 00e245173320c..4fcb73b727aa5 100644 --- a/drivers/scsi/NCR5380.c +++ b/drivers/scsi/NCR5380.c @@ -1807,8 +1807,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) return; case PHASE_MSGIN: len = 1; + tmp = 0xff; data = &tmp; NCR5380_transfer_pio(instance, &phase, &len, &data, 0); + if (tmp == 0xff) + break; ncmd->message = tmp; switch (tmp) { @@ -1996,6 +1999,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) break; case PHASE_STATIN: len = 1; + tmp = ncmd->status; data = &tmp; NCR5380_transfer_pio(instance, &phase, &len, &data, 0); ncmd->status = tmp; -- 2.43.0
