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path: root/drivers/staging/ozwpan/ozcdev.c
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Diffstat (limited to 'drivers/staging/ozwpan/ozcdev.c')
-rw-r--r--drivers/staging/ozwpan/ozcdev.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/staging/ozwpan/ozcdev.c b/drivers/staging/ozwpan/ozcdev.c
index 6ccb64fb078..6ce0af9977d 100644
--- a/drivers/staging/ozwpan/ozcdev.c
+++ b/drivers/staging/ozwpan/ozcdev.c
@@ -155,6 +155,9 @@ static ssize_t oz_cdev_write(struct file *filp, const char __user *buf,
struct oz_app_hdr *app_hdr;
struct oz_serial_ctx *ctx;
+ if (count > sizeof(ei->data) - sizeof(*elt) - sizeof(*app_hdr))
+ return -EINVAL;
+
spin_lock_bh(&g_cdev.lock);
pd = g_cdev.active_pd;
if (pd)