Patch "scsi: isci: avoid array subscript warning" has been added to the 4.9-stable tree

Patch "scsi: isci: avoid array subscript warning" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    scsi: isci: avoid array subscript warning

to the 4.9-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-isci-avoid-array-subscript-warning.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 5cfa2a3c7342bd0b50716c8bb32ee491af43c785 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Fri, 18 Nov 2016 17:14:01 +0100
Subject: scsi: isci: avoid array subscript warning

From: Arnd Bergmann <arnd@arndb.de>

commit 5cfa2a3c7342bd0b50716c8bb32ee491af43c785 upstream.

I'm getting a new warning with gcc-7:

isci/remote_node_context.c: In function 'sci_remote_node_context_destruct':
isci/remote_node_context.c:69:16: error: array subscript is above array bounds [-Werror=array-bounds]

This is odd, since we clearly cover all values for enum
scis_sds_remote_node_context_states here. Anyway, checking for an array
overflow can't harm and it makes the warning go away.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/scsi/isci/remote_node_context.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/scsi/isci/remote_node_context.c
+++ b/drivers/scsi/isci/remote_node_context.c
@@ -66,6 +66,9 @@ const char *rnc_state_name(enum scis_sds
 {
 	static const char * const strings[] = RNC_STATES;
 
+	if (state >= ARRAY_SIZE(strings))
+		return "UNKNOWN";
+
 	return strings[state];
 }
 #undef C


Patches currently in stable-queue which might be from arnd@arndb.de are

queue-4.9/staging-wilc1000-simplify-vif-ndev-accesses.patch
queue-4.9/scsi-isci-avoid-array-subscript-warning.patch