Re: [syzbot] [sound?] KMSAN: uninit-value in line6_midibuf_read
From: Edward Adam Davis
Date: Tue Jul 23 2024 - 21:04:38 EST
when alloc buffer for midi_buffer->buf, init mem to 0
#syz test: upstream 2c9b3512402e
diff --git a/sound/usb/line6/midibuf.c b/sound/usb/line6/midibuf.c
index e7f830f7526c..1b699cb3b38d 100644
--- a/sound/usb/line6/midibuf.c
+++ b/sound/usb/line6/midibuf.c
@@ -48,7 +48,7 @@ void line6_midibuf_reset(struct midi_buffer *this)
int line6_midibuf_init(struct midi_buffer *this, int size, int split)
{
- this->buf = kmalloc(size, GFP_KERNEL);
+ this->buf = kzalloc(size, GFP_KERNEL);
if (this->buf == NULL)
return -ENOMEM;