diff mbox series

[v9,22/33] scsi: sd: Fix scsi_mode_sense caller's sshdr use

Message ID 20230711214620.87232-23-michael.christie@oracle.com
State Superseded
Headers show
Series scsi: Allow scsi_execute users to control retries | expand

Commit Message

Mike Christie July 11, 2023, 9:46 p.m. UTC 
The sshdr passed into scsi_execute_cmd is only initialized if
scsi_execute_cmd returns >= 0, and scsi_mode_sense will convert all non
good statuses like check conditions to -EIO. This has scsi_mode_sense
callers that were possibly accessing an uninitialized sshdrs to only
access it if we got -EIO.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 drivers/scsi/sd.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index ab0d6b1835be..48b727b2bf1d 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -2967,7 +2967,7 @@  sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
 	}
 
 bad_sense:
-	if (scsi_sense_valid(&sshdr) &&
+	if (res == -EIO && scsi_sense_valid(&sshdr) &&
 	    sshdr.sense_key == ILLEGAL_REQUEST &&
 	    sshdr.asc == 0x24 && sshdr.ascq == 0x0)
 		/* Invalid field in CDB */
@@ -3015,7 +3015,7 @@  static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
 		sd_first_printk(KERN_WARNING, sdkp,
 			  "getting Control mode page failed, assume no ATO\n");
 
-		if (scsi_sense_valid(&sshdr))
+		if (res == -EIO && scsi_sense_valid(&sshdr))
 			sd_print_sense_hdr(sdkp, &sshdr);
 
 		return;