This is a note to let you know that I've just added the patch titled
scsi_common: do not clobber fixed sense information
to the 4.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi_common-do-not-clobber-fixed-sense-information.patch
and it can be found in the queue-4.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ba08311647892cc7912de74525fd78416caf544a Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@xxxxxxx>
Date: Fri, 18 Mar 2016 14:55:38 +0100
Subject: scsi_common: do not clobber fixed sense information
From: Hannes Reinecke <hare@xxxxxxx>
commit ba08311647892cc7912de74525fd78416caf544a upstream.
For fixed sense the information field is 32 bits, to we need to truncate
the information field to avoid clobbering the sense code.
Fixes: a1524f226a02 ("libata-eh: Set 'information' field for autosense")
Signed-off-by: Hannes Reinecke <hare@xxxxxxxx>
Reviewed-by: Lee Duncan <lduncan@xxxxxxxx>
Reviewed-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
Reviewed-by: Ewan D. Milne <emilne@xxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/scsi_common.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
--- a/drivers/scsi/scsi_common.c
+++ b/drivers/scsi/scsi_common.c
@@ -278,8 +278,16 @@ int scsi_set_sense_information(u8 *buf,
ucp[3] = 0;
put_unaligned_be64(info, &ucp[4]);
} else if ((buf[0] & 0x7f) == 0x70) {
- buf[0] |= 0x80;
- put_unaligned_be64(info, &buf[3]);
+ /*
+ * Only set the 'VALID' bit if we can represent the value
+ * correctly; otherwise just fill out the lower bytes and
+ * clear the 'VALID' flag.
+ */
+ if (info <= 0xffffffffUL)
+ buf[0] |= 0x80;
+ else
+ buf[0] &= 0x7f;
+ put_unaligned_be32((u32)info, &buf[3]);
}
return 0;
Patches currently in stable-queue which might be from hare@xxxxxxx are
queue-4.5/scsi_common-do-not-clobber-fixed-sense-information.patch
queue-4.5/aic7xxx-fix-queue-depth-handling.patch
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