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[v2] scsi: fix upper bounds check of sense key in scsi_sense_key_string()

Message ID 1471040407-5325-1-git-send-email-tyreld@linux.vnet.ibm.com (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Tyrel Datwyler Aug. 12, 2016, 10:20 p.m. UTC
Commit 655ee63cf371 added a "Completed" sense string with key 0xF to
snstext[], but failed to updated the upper bounds check of the sense key in
scsi_sense_key_string().

Fixes: 655ee63cf371 ("[SCSI] scsi constants: command, sense key + additional sense strings")
Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
---

Changes since v1:
 - Addressed Bart's comments
 - Moved opening function brace to match kernel style guidelines
 - Changed upperbounds check to use ARRAY_SIZE instead of fixed value

 drivers/scsi/constants.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Comments

Martin K. Petersen Aug. 16, 2016, 4:51 a.m. UTC | #1
>>>>> "Tyrel" == Tyrel Datwyler <tyreld@linux.vnet.ibm.com> writes:

Tyrel> Commit 655ee63cf371 added a "Completed" sense string with key 0xF
Tyrel> to snstext[], but failed to updated the upper bounds check of the
Tyrel> sense key in scsi_sense_key_string().

Applied to 4.8/scsi-fixes.
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Patch

diff --git a/drivers/scsi/constants.c b/drivers/scsi/constants.c
index 83458f7..6dc96c8 100644
--- a/drivers/scsi/constants.c
+++ b/drivers/scsi/constants.c
@@ -361,8 +361,9 @@  static const char * const snstext[] = {
 
 /* Get sense key string or NULL if not available */
 const char *
-scsi_sense_key_string(unsigned char key) {
-	if (key <= 0xE)
+scsi_sense_key_string(unsigned char key)
+{
+	if (key < ARRAY_SIZE(snstext))
 		return snstext[key];
 	return NULL;
 }