From: Takashi Iwai Date: Tue, 2 Apr 2024 06:36:25 +0000 (+0200) Subject: ALSA: line6: Zero-initialize message buffers X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c4e51e424e2c772ce1836912a8b0b87cd61bc9d5;p=linux.git ALSA: line6: Zero-initialize message buffers For shutting up spurious KMSAN uninit-value warnings, just replace kmalloc() calls with kzalloc() for the buffers used for communications. There should be no real issue with the original code, but it's still better to cover. Reported-by: syzbot+7fb05ccf7b3d2f9617b3@syzkaller.appspotmail.com Closes: https://lore.kernel.org/r/00000000000084b18706150bcca5@google.com Message-ID: <20240402063628.26609-1-tiwai@suse.de> Signed-off-by: Takashi Iwai --- diff --git a/sound/usb/line6/driver.c b/sound/usb/line6/driver.c index b67617b68e509..f4437015d43a7 100644 --- a/sound/usb/line6/driver.c +++ b/sound/usb/line6/driver.c @@ -202,7 +202,7 @@ int line6_send_raw_message_async(struct usb_line6 *line6, const char *buffer, struct urb *urb; /* create message: */ - msg = kmalloc(sizeof(struct message), GFP_ATOMIC); + msg = kzalloc(sizeof(struct message), GFP_ATOMIC); if (msg == NULL) return -ENOMEM; @@ -688,7 +688,7 @@ static int line6_init_cap_control(struct usb_line6 *line6) int ret; /* initialize USB buffers: */ - line6->buffer_listen = kmalloc(LINE6_BUFSIZE_LISTEN, GFP_KERNEL); + line6->buffer_listen = kzalloc(LINE6_BUFSIZE_LISTEN, GFP_KERNEL); if (!line6->buffer_listen) return -ENOMEM; @@ -697,7 +697,7 @@ static int line6_init_cap_control(struct usb_line6 *line6) return -ENOMEM; if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) { - line6->buffer_message = kmalloc(LINE6_MIDI_MESSAGE_MAXLEN, GFP_KERNEL); + line6->buffer_message = kzalloc(LINE6_MIDI_MESSAGE_MAXLEN, GFP_KERNEL); if (!line6->buffer_message) return -ENOMEM;