From 1c71065df2df693d208dd32758171c1dece66341 Mon Sep 17 00:00:00 2001 From: Finn Thain Date: Wed, 7 Aug 2024 13:36:28 +1000 Subject: [PATCH] scsi: NCR5380: Initialize buffer for MSG IN and STATUS transfers 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 Signed-off-by: Finn Thain Link: https://lore.kernel.org/r/52e02a8812ae1a2d810d7f9f7fd800c3ccc320c4.1723001788.git.fthain@linux-m68k.org Signed-off-by: Martin K. Petersen --- drivers/scsi/NCR5380.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c index 00e245173320..4fcb73b727aa 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; -- 2.50.1