linux-kernel - [PATCH AUTOSEL 4.19 1/4] ALSA: line6: Zero-initialize message buffers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240415100520.3127870-1-sashal@kernel.org>
Date: Mon, 15 Apr 2024 06:05:14 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Takashi Iwai <tiwai@...e.de>,
	syzbot+7fb05ccf7b3d2f9617b3@...kaller.appspotmail.com,
	Sasha Levin <sashal@...nel.org>,
	perex@...ex.cz,
	tiwai@...e.com,
	linux-sound@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 1/4] ALSA: line6: Zero-initialize message buffers

From: Takashi Iwai <tiwai@...e.de>

[ 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@...kaller.appspotmail.com
Closes: https://lore.kernel.org/r/00000000000084b18706150bcca5@google.com
Message-ID: <20240402063628.26609-1-tiwai@...e.de>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/usb/line6/driver.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/usb/line6/driver.c b/sound/usb/line6/driver.c
index 2399d500b8812..8970d4b3b42c3 100644
--- a/sound/usb/line6/driver.c
+++ b/sound/usb/line6/driver.c
@@ -216,7 +216,7 @@ 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;
 
@@ -694,7 +694,7 @@ 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;
 
@@ -703,7 +703,7 @@ 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;
 
-- 
2.43.0