linux-kernel - Re: [syzbot] [usb?] KMSAN: uninit-value in bcmp (3)

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Message-ID: <ZwLA_mQtFM-hTGxD@iZbp1asjb3cy8ks0srf007Z>
Date: Mon, 7 Oct 2024 00:55:26 +0800
From: Qianqiang Liu <qianqiang.liu@....com>
To: syzbot <syzbot+0399100e525dd9696764@...kaller.appspotmail.com>
Cc: gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [usb?] KMSAN: uninit-value in bcmp (3)

#syz test

diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c
index 6d28467ce352..ad2a9c09987c 100644
--- a/drivers/usb/misc/iowarrior.c
+++ b/drivers/usb/misc/iowarrior.c
@@ -832,9 +832,8 @@ static int iowarrior_probe(struct usb_interface *interface,
 			 iowarrior_callback, dev,
 			 dev->int_in_endpoint->bInterval);
 	/* create an internal buffer for interrupt data from the device */
-	dev->read_queue =
-	    kmalloc_array(dev->report_size + 1, MAX_INTERRUPT_BUFFER,
-			  GFP_KERNEL);
+	dev->read_queue = kcalloc(dev->report_size + 1, MAX_INTERRUPT_BUFFER,
+				  GFP_KERNEL);
 	if (!dev->read_queue)
 		goto error;
 	/* Get the serial-number of the chip */

-- 
Best,
Qianqiang Liu