[QUEUED v20160420 10/19] intel_th: msu: Handle kstrndup() failure

From: Alexander Shishkin
Date: Wed Apr 20 2016 - 06:46:05 EST


Currently, the nr_pages attribute store does not check if kstrndup()
succeeded. Fix this.

Reported-by: Alan Cox <alan.cox@xxxxxxxxx>
Signed-off-by: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Reviewed-by: Laurent Fert <laurent.fert@xxxxxxxxx>
---
drivers/hwtracing/intel_th/msu.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/hwtracing/intel_th/msu.c b/drivers/hwtracing/intel_th/msu.c
index d9d6022c5a..747ccf84bd 100644
--- a/drivers/hwtracing/intel_th/msu.c
+++ b/drivers/hwtracing/intel_th/msu.c
@@ -1393,6 +1393,11 @@ nr_pages_store(struct device *dev, struct device_attribute *attr,
do {
end = memchr(p, ',', len);
s = kstrndup(p, end ? end - p : len, GFP_KERNEL);
+ if (!s) {
+ ret = -ENOMEM;
+ goto free_win;
+ }
+
ret = kstrtoul(s, 10, &val);
kfree(s);

--
2.8.0.rc3