From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from xmbghk7.mail.qq.com (xmbghk7.mail.qq.com [43.163.128.44]) (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 93BAD199956 for ; Mon, 7 Oct 2024 10:53:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=43.163.128.44 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728298440; cv=none; b=B3veGsb4zNm2jTbgfHJl/MUwf4quWj22VHHGjIqhg5ZROUkKQdSeGmI1peGEgu+pF/hV8Zc7gmiHGQ5B6u64vMqRv8C4twLpPudYzCAX4qUjbjjLDW1MuA0+iRggpa449TBcaze6C7yIG86Gt4wVcJKuyydURROUBOqYoRp4Gjc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728298440; c=relaxed/simple; bh=peJIajO8WRJeQMbCxFDKR4/zxLRRqanCybsIDi+aK5c=; h=Message-ID:From:To:Cc:Subject:Date:In-Reply-To:References: MIME-Version; b=a8rPnav5oTSrDiqcTlHYDWJVOKeIBRG7Tw6Wbo0L16QCPqpVyPGaKNOlxuM96KKwWwqpV7PePAI50+tC/ma3WZRoXLlmxYgaB8D3OPGTjF4+KpbsUIrLGJKO9mEMhwj/qTAi3Kz+zKg6fkA0p5BA6VQPq9fD/tOc7y4TTDod3/I= 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=RAMVeHq0; arc=none smtp.client-ip=43.163.128.44 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="RAMVeHq0" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qq.com; s=s201512; t=1728298434; bh=NjCxvZLPN5Hbo5qzhGaTXISfrWcAhOb8lZVBjLDB6fQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=RAMVeHq0gt7kRwa4Nxvpd6cwXUIa6F7cqvt1zr20Evb5LoqlfiKxgZnc81W/VeZHD Pv2fvEhp0lPShTb9SK0dwKYXS/xCwd07hY7GogEbSn2P+4smlUeJmEKDwieggX7rhg ux80+PmCG6OH+9JhpCXT5Ca+oJzVcvk6pGCMgrc0= Received: from pek-lxu-l1.wrs.com ([111.198.224.50]) by newxmesmtplogicsvrsza15-1.qq.com (NewEsmtp) with SMTP id D748F098; Mon, 07 Oct 2024 18:53:52 +0800 X-QQ-mid: xmsmtpt1728298432t6vkrqgbv Message-ID: X-QQ-XMAILINFO: N7h1OCCDntujOt0xq9n2i0HPVknZU67nxAyAWtV8DMysSAC4cq55am0Wygzfti D7bgAxU4GbZYV695Hku4P/ECeQ0SIVFMznaSQMLGbXi0c6HLUkiSOHDraSlDVt5z/izMNm6fYTIz Uk61wsDPXcyohLcldlv2U6fBuiGmw+BCwDzTW1mkEQxotrV+o8IPZv1KI8v3EneuxEYwJVGQqgse QyGRYwvhl+rqwlc58hyRQ55alueVrPA64j9FNpw56LH6vf/5Mo79QynyD3XQAl6zlk1vT5s1AuIu aBGWhTrvgEpzloNBB3K3nyj0lrC7SOlVNy/takcOQHDVjbglmKFzuZamQbzlQxNIjbQg/Nsg1+Pa JHgCT/l8x2fI+aEkyV1gmm41fNYaJp47hUwqSxZQkF1MhDIQIYWTVnWnF3RXyeml1NU7rHrBt6pr 7/7IXywrTRrSWyQOZeLc85xiU6E83EcffdMEU100L/wx26ZkvlQUT6qaS5HuqCDNecJzVBl40ovD rOaNZ3MOIOxuu736yQpNVBEqTmBdhyR0I38yQasmZaAyjy0a13+E3iIeySFcoJW6yGWHffvyR4LM SdGJR1XqcjYRKg3PH0vAfC1SMJw0DmL6QZoaw34O3PMjQEGZ/bN4p8O4ktsR4nmiFsfw4MzR9aIK ZO8uiOHWAnJ4uLqDjYNAG8+9ugORFyWpAdxiNRJLuOmXlfUDYDDf6cp+/z0XavQf91HGeOzl6gSg MDH/JFdVQVIFvZggerBkM3rb3QqGACpreQHQ7JuFYhz6ooHvQCA9DWmXBgq/vqTRNShO64sMQ0e+ o/pnFOof20+6kZkwCcG9mV7Ue+6A8yaJet/ZN6CxxWoZmeQzrp19szPtp9h3Xbx/6EoLV7ljszSP poQK7+ZMSsI6aROvdJrxmh2I8P1SYcHpQG3NHSPIJSojZrGTmks1VfA5CGCscjOQ== X-QQ-XMRINFO: NS+P29fieYNw95Bth2bWPxk= From: Edward Adam Davis To: syzbot+6ea290ba76d8c1eb1ac2@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [bluetooth?] KMSAN: uninit-value in hci_rx_work Date: Mon, 7 Oct 2024 18:53:53 +0800 X-OQ-MSGID: <20241007105352.3364661-2-eadavis@qq.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <6703b264.050a0220.49194.0502.GAE@google.com> References: <6703b264.050a0220.49194.0502.GAE@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit set skb reserve memory to 0. #syz test diff --git a/drivers/bluetooth/hci_vhci.c b/drivers/bluetooth/hci_vhci.c index aa6af351d02d..b2e99a83d6c7 100644 --- a/drivers/bluetooth/hci_vhci.c +++ b/drivers/bluetooth/hci_vhci.c @@ -492,6 +492,7 @@ static inline ssize_t vhci_get_user(struct vhci_data *data, kfree_skb(skb); return -EFAULT; } + memset(skb + len, 0, BT_SKB_RESERVE); pkt_type = *((__u8 *) skb->data); skb_pull(skb, 1);