The kzalloc can be failed when memory is not enough
to allocate. When kzalloc failed, it need to return
error code with ENOMEM
Signed-off-by: Daeseok Youn <[email protected]>
---
drivers/staging/dgnc/dgnc_tty.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c
index 074988d..e97faaa 100644
--- a/drivers/staging/dgnc/dgnc_tty.c
+++ b/drivers/staging/dgnc/dgnc_tty.c
@@ -1106,6 +1106,14 @@ static int dgnc_tty_open(struct tty_struct *tty, struct file *file)
if (!ch->ch_wqueue)
ch->ch_wqueue = kzalloc(WQUEUESIZE, GFP_KERNEL);
+ if (!ch->ch_rqueue || !ch->ch_equeue || !ch->ch_wqueue) {
+ kfree(ch->ch_rqueue);
+ kfree(ch->ch_equeue);
+ kfree(ch->ch_wqueue);
+
+ return -ENOMEM;
+ }
+
spin_lock_irqsave(&ch->ch_lock, flags);
ch->ch_flags &= ~(CH_OPENING);
--
1.9.1