From: Jan Beulich <[email protected]>
Acked-by: Ian Campbell <[email protected]>
Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Jan Beulich <[email protected]>
[v1: Rebased on upstream]
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
---
drivers/xen/xenbus/xenbus_dev_frontend.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/xen/xenbus/xenbus_dev_frontend.c
b/drivers/xen/xenbus/xenbus_dev_frontend.c
index 89f7625..ac72702 100644
--- a/drivers/xen/xenbus/xenbus_dev_frontend.c
+++ b/drivers/xen/xenbus/xenbus_dev_frontend.c
@@ -458,7 +458,7 @@ static ssize_t xenbus_file_write(struct file *filp,
goto out;
/* Can't write a xenbus message larger we can buffer */
- if ((len + u->len) > sizeof(u->u.buffer)) {
+ if (len > sizeof(u->u.buffer) - u->len) {
/* On error, dump existing buffer */
u->len = 0;
rc = -EINVAL;
--
1.7.7.6
--
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