From: Edward Adam Davis <eadavis@qq.com>
To: syzbot+78eccfb8b3c9a85fc6c5@syzkaller.appspotmail.com
Cc: linux-kernel@vger.kernel.org, linux-sound@vger.kernel.org,
perex@perex.cz, syzkaller-bugs@googlegroups.com, tiwai@suse.com
Subject: [PATCH] ALSA: line6: init buf to zero
Date: Wed, 24 Jul 2024 13:58:45 +0800 [thread overview]
Message-ID: <tencent_6ECFD36FE36EC96283A5C4587761F76F8605@qq.com> (raw)
In-Reply-To: <00000000000000949c061df288c5@google.com>
Syzbot report KMSAN uninit-value warnings.
When alloc buffer for midi_buffer->buf, init mem to 0.
Reported-and-tested-by: syzbot+78eccfb8b3c9a85fc6c5@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=78eccfb8b3c9a85fc6c5
Signed-off-by: Edward Adam Davis <eadavis@qq.com>
---
sound/usb/line6/midibuf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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;
--
2.43.0
next prev parent reply other threads:[~2024-07-24 6:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-23 23:29 [syzbot] [sound?] KMSAN: uninit-value in line6_midibuf_read syzbot
2024-07-24 0:56 ` Edward Adam Davis
2024-07-24 1:37 ` syzbot
2024-07-24 5:58 ` Edward Adam Davis [this message]
2024-07-24 7:22 ` [PATCH] ALSA: line6: init buf to zero Takashi Iwai
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