From patchwork Wed Jul 24 05:58:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Edward Adam Davis X-Patchwork-Id: 13740610 Received: from out203-205-221-192.mail.qq.com (out203-205-221-192.mail.qq.com [203.205.221.192]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF26A535A3; Wed, 24 Jul 2024 06:05:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.205.221.192 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721801125; cv=none; b=r2L6eSDAV1pDVz4U7dFED4KyB0fmxPO5GM/t+YN3evZgWmr7/56ZsgQ/6/ZAqPutIuJjNXDnL2nSUo5rd7o+lr/C2KuQmOGDrrnAG+kT0msqj1DoZCFRUbBTe5nIIyt19ZmJ12YFRJpjHcbwY9JGD+cB7MlUXZEib6p7Fp4uFZA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721801125; c=relaxed/simple; bh=FbTT5VQ7RFZRhoZk1QUz96CANhgfKYhBvl45FNtMJBE=; h=Message-ID:From:To:Cc:Subject:Date:In-Reply-To:References: MIME-Version; b=ZDOMAs91hEe444zNLpd+Bzh/0mPYkzd+3QRHw90/Sqm7wfcUkrTufQ7RbupOZh/sOxLKeIlvLPi3BIZmYSDBZAIDMMfoc4z8QpkJ4C9U+hM8wi56Ogotq7O1Q6Vf9TEfQdCjYN95RaKFmyKtBFZ24kZMCMF1WpoD6EIvztGuBgw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com; spf=pass smtp.mailfrom=qq.com; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b=R7O0kUVQ; arc=none smtp.client-ip=203.205.221.192 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=qq.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b="R7O0kUVQ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qq.com; s=s201512; t=1721801119; bh=1RSHqUJ8TkszS0AbgUKN3N8zWa79Ibn+2Eb9XNn4CRk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=R7O0kUVQkOTkY+T9qQw1QejAvkCoQyGroUJx6R8z2YwS8qoH1kKgpEcgM1Z153CRm m/yee+qtEK6Vl+AsHpUwmoU3ykzqzoe+vdzahhjNsQEdzk+HLcLp36jYWijqh27YOx 4vx2PRwU0oOpnoi1XFBYZdMiBOXyAlQsulVPWAUw= Received: from pek-lxu-l1.wrs.com ([111.198.228.103]) by newxmesmtplogicsvrszb16-1.qq.com (NewEsmtp) with SMTP id EAC81231; Wed, 24 Jul 2024 13:58:44 +0800 X-QQ-mid: xmsmtpt1721800724tfru4517l Message-ID: X-QQ-XMAILINFO: MBjwNRQMz5zUrP9bRe4eogkJm3QJ025y1nm+TzdY0ETtFH/Pg8tIjAb1Fp3t3I FtuFJ/VStqZYIVSROvkNCuEmEVXGKSa67r0Bv/Uf3nTfWbUuNSyGYK92kC4qf1G9f4MDRWIch7f3 qQyOBFFKwp6fOBmaxhCYane5PMqsZieRVZvHN4XvPiQGo95IB73fus5qMl5E5cUogIX38HsyAlrI 4NGhLqax+P4i27zueGnqt7rjv6q7GKxJVYZ1adJ+NxFAsvK8dvy4WNl9gnObjnSEOr9a73+Uo68O 4Ua9PT0JFbMO0ayMt0mlAzC5EjLZyrsnlaPlXeNHatQozYfcBjzL2NKrwp++5uWTsJZqsn/gGoK5 gwHIMGJv3BhpOoshP5YtOZn9pNfgt04Ez2vlgnklEMLFZ2Fo/EPjyyPBHxgolf+VvZYG/w/ELKGS Vrd5azWq2zT8fMG9YGvhc+aNLfgPj82KVly+p/3d00t6HJEMwzXEum64i1cxtiGVQifhmmv9/qTN V2Z987EREhuJetJMqQ82cXMzwh/OYm3g4dpZd434iRB9AYnkNP8mR25RMIE6x9+V722lhTlNvuUC 5HVwPf39703x3SIB0ef11JTqV5EQ8W3B5tk/eb2dphpFyxXLT4o1wwzCju+4nLooXK1gqAqzPWDR aETKdqZFYPmVesJNd7uell5tjWFDJwPOTJ43qEvFhoVXf509HwuKH2AGOY48bxYEx4PAerySSbJ3 O0fFew0S+Rk6+rxa3iJf8gnbnktwY4R9CHmBk1CzOalLXaKAsocmzXg6HTllPyRwsP9N0w/nIXy6 bd4KeVdmRhsQxXu4tL0rNzr++39zA0Aa4ZFsFa/Rr/vu7PqeWP7mfK92RWRheY9U3sVCjIHNKx3u tr2+klFWLy4uolKbtORUSZwqjHWf5u78sFaCw2nyU1gk+B3yDzlXmo3Yh/Zh1a9Q== X-QQ-XMRINFO: MPJ6Tf5t3I/ycC2BItcBVIA= From: Edward Adam Davis 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 X-OQ-MSGID: <20240724055844.1337846-2-eadavis@qq.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <00000000000000949c061df288c5@google.com> References: <00000000000000949c061df288c5@google.com> Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 --- 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;