Patch "ALSA: line6: Zero-initialize message buffers" has been added to the 5.4-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    ALSA: line6: Zero-initialize message buffers

to the 5.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     alsa-line6-zero-initialize-message-buffers.patch
and it can be found in the queue-5.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 9f12510524a9176bdfe1bd357d3358f744638d75
Author: Takashi Iwai <tiwai@xxxxxxx>
Date:   Tue Apr 2 08:36:25 2024 +0200

    ALSA: line6: Zero-initialize message buffers
    
    [ Upstream commit c4e51e424e2c772ce1836912a8b0b87cd61bc9d5 ]
    
    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@xxxxxxxxxxxxxxxxxxxxxxxxx
    Closes: https://lore.kernel.org/r/00000000000084b18706150bcca5@xxxxxxxxxx
    Message-ID: <20240402063628.26609-1-tiwai@xxxxxxx>
    Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/sound/usb/line6/driver.c b/sound/usb/line6/driver.c
index 22104cb84b1ca..efa8fb59d3ad2 100644
--- a/sound/usb/line6/driver.c
+++ b/sound/usb/line6/driver.c
@@ -201,7 +201,7 @@ 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;
 
@@ -679,7 +679,7 @@ 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;
 
@@ -688,7 +688,7 @@ 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;