Patch "bus: arm-ccn: Check memory allocation failure" has been added to the 4.9-stable tree

Patch "bus: arm-ccn: Check memory allocation failure" 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

    bus: arm-ccn: Check memory allocation failure

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:
     bus-arm-ccn-check-memory-allocation-failure.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 24771179c5c138f0ea3ef88b7972979f62f2d5db Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Sun, 27 Aug 2017 11:06:50 +0100
Subject: bus: arm-ccn: Check memory allocation failure

From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

commit 24771179c5c138f0ea3ef88b7972979f62f2d5db upstream.

Check memory allocation failures and return -ENOMEM in such cases

This avoids a potential NULL pointer dereference.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/bus/arm-ccn.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/bus/arm-ccn.c
+++ b/drivers/bus/arm-ccn.c
@@ -1271,6 +1271,10 @@ static int arm_ccn_pmu_init(struct arm_c
 		int len = snprintf(NULL, 0, "ccn_%d", ccn->dt.id);
 
 		name = devm_kzalloc(ccn->dev, len + 1, GFP_KERNEL);
+		if (!name) {
+			err = -ENOMEM;
+			goto error_choose_name;
+		}
 		snprintf(name, len + 1, "ccn_%d", ccn->dt.id);
 	}
 
@@ -1318,6 +1322,7 @@ static int arm_ccn_pmu_init(struct arm_c
 
 error_pmu_register:
 error_set_affinity:
+error_choose_name:
 	ida_simple_remove(&arm_ccn_pmu_ida, ccn->dt.id);
 	for (i = 0; i < ccn->num_xps; i++)
 		writel(0, ccn->xp[i].base + CCN_XP_DT_CONTROL);


Patches currently in stable-queue which might be from christophe.jaillet@wanadoo.fr are

queue-4.9/bus-arm-ccn-check-memory-allocation-failure.patch