diff options
| author | Finn Thain <fthain@telegraphics.com.au> | 2018-09-27 11:17:11 +1000 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-09-28 02:19:45 -0400 |
| commit | 7ef55f6744c45e3d7c85a3f74ada39b67ac741dd (patch) | |
| tree | 2e0bdfe88b70eed41d5f8468fa47c8b72dc6f25e /drivers/scsi/NCR5380.c | |
| parent | 070356513963be6196142acff56acc8359069fa1 (diff) | |
| download | lwn-7ef55f6744c45e3d7c85a3f74ada39b67ac741dd.tar.gz lwn-7ef55f6744c45e3d7c85a3f74ada39b67ac741dd.zip | |
scsi: NCR5380: Check for invalid reselection target
The X3T9.2 specification (draft) says, under "6.1.4.1 RESELECTION", that "the
initiator shall not respond to a RESELECTION phase if other than two SCSI ID
bits are on the DATA BUS." This issue (too many bits set) has been observed in
the wild, so add a check.
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/NCR5380.c')
| -rw-r--r-- | drivers/scsi/NCR5380.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c index e96a48b9e86c..3058b68b6740 100644 --- a/drivers/scsi/NCR5380.c +++ b/drivers/scsi/NCR5380.c @@ -2016,6 +2016,11 @@ static void NCR5380_reselect(struct Scsi_Host *instance) NCR5380_write(MODE_REG, MR_BASE); target_mask = NCR5380_read(CURRENT_SCSI_DATA_REG) & ~(hostdata->id_mask); + if (!target_mask || target_mask & (target_mask - 1)) { + shost_printk(KERN_WARNING, instance, + "reselect: bad target_mask 0x%02x\n", target_mask); + return; + } dsprintk(NDEBUG_RESELECTION, instance, "reselect\n"); |