[PATCH 06/10] Drivers: hv: utils: use memdup_user in hvt_op_write
K. Y. Srinivasan
kys at microsoft.com
Thu Oct 8 02:01:45 UTC 2015
From: Olaf Hering <olaf at aepfle.de>
Use memdup_user to handle OOM.
Fixes: 14b50f80c32d ('Drivers: hv: util: introduce hv_utils_transport abstraction')
Signed-off-by: Olaf Hering <olaf at aepfle.de>
Signed-off-by: K. Y. Srinivasan <kys at microsoft.com>
---
drivers/hv/hv_utils_transport.c | 9 ++++-----
1 files changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/hv/hv_utils_transport.c b/drivers/hv/hv_utils_transport.c
index 1505ee6..24b2766 100644
--- a/drivers/hv/hv_utils_transport.c
+++ b/drivers/hv/hv_utils_transport.c
@@ -80,11 +80,10 @@ static ssize_t hvt_op_write(struct file *file, const char __user *buf,
hvt = container_of(file->f_op, struct hvutil_transport, fops);
- inmsg = kzalloc(count, GFP_KERNEL);
- if (copy_from_user(inmsg, buf, count)) {
- kfree(inmsg);
- return -EFAULT;
- }
+ inmsg = memdup_user(buf, count);
+ if (IS_ERR(inmsg))
+ return PTR_ERR(inmsg);
+
if (hvt->on_msg(inmsg, count))
return -EFAULT;
kfree(inmsg);
--
1.7.4.1
More information about the devel
mailing list