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b=n9QISdfkpHvAB+Ox7A0QTo648ioa34GG5uKdw9Th8+eOINHddLQqalZea4OF6+w2V qSVyWrwFRnzvovgSi3Zi1269oXW7hy7M1M4BG/k3KEZTuBJxuNIJM3KcBdhtmg0xwJ 5m4WhwQ0ZL9a/9fgNrf0JXvEU5ztq8WLclsSKIwU= Received: from pek-lxu-l1.wrs.com ([111.198.228.153]) by newxmesmtplogicsvrszc13-0.qq.com (NewEsmtp) with SMTP id 3B600C85; Tue, 28 May 2024 10:14:54 +0800 X-QQ-mid: xmsmtpt1716862494tkpl9v87b Message-ID: X-QQ-XMAILINFO: OZsapEVPoiO6a68qvbgUUYSm2DO+Ym3ySiJtxG+YNzVa1x57O+VNnpNEYpgWBF jQuIXFh5JnaXF+sNmUsyYyON9iHTX8iBTXKaYejKNcjAi7ba1dftilVtnNJNwJRERyzjoDoowHvi gU0hF/b4olF6qGDAyiJ/TMJ0CawkSjfiBZrJtwM9J1WGLt3ogIKf2eroWiytQuK9AM8c4zl22VyO diSIjI3laxcxyGBUKRKgRVFB4jxhfasIG/IMnR2c61UmaWXW59P9RjGkfpYE8Cax2TXuT4xBYzya uLORnwB1oQwkk896qOjmDJx/FZVV0bam1Zr54iVuTimwEpMPL0jU6iH1elOZHnG2ZoQcURcZlHlF yTq1+FzDhPqJCQg0+E4bxIPlie35xxiE4CywAESVz8n9LXejEHK+xs694eCsZLrn0DvQT1H7WP58 vxc3oaDroOtxmY9Kg4NWwJu0fs1IGv+zXxKoFHqXnH7HDKFi+oKf+HNunrdbJiJXiPFa+Pwdn5RW RLiXWCMhZluAhcAhZV0Algo8v58A/XWA/tfwvfnrQgEZQGlLksic+Dn8K6RWChCfDiYTCrft1cA7 fJ1LBnRNH/eg5TC9GqorPUFd7R9pYDwvmn7cFZVCmn7XreNdUT6pTkjxXno+UW1j5aRNqGoluxxZ +5a7cYaHf/+hGuu2Z/F4lKBOE0stUIh86gaJ1TmKWmM5BQgGcZUKNzSwQVh3Blxkh+oWiYndyuio 0EQ4AA0x4/pJxofB4/b6j3cPHdfvIhUDWNXjJ3NxokjUfgolW15qsgQTE4jjc5DEW5IzIl5R+P9V W1bcQ7PXVAcFjPXY/7+0IDNBtC2rcqC/gSjN8a8C1mtbQMrcQ/uhIZ843aNkQRsy3N7mwN4qnYQ3 5pwCjKQ801VlhpyT5I0q8CHXcbng7AYXSi25vCI0Gfhu6x6IuVam23yjW/hgzqeA== X-QQ-XMRINFO: OD9hHCdaPRBwq3WW+NvGbIU= From: Edward Adam Davis To: syzbot+71bfed2b2bcea46c98f2@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [nfc?] [net?] KMSAN: uninit-value in nci_ntf_packet (2) Date: Tue, 28 May 2024 10:14:54 +0800 X-OQ-MSGID: <20240528021453.1105390-2-eadavis@qq.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <0000000000007018c0061964aa67@google.com> References: <0000000000007018c0061964aa67@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 please test uv in nci_ntf_packet #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 614da38e2f7a diff --git a/drivers/nfc/virtual_ncidev.c b/drivers/nfc/virtual_ncidev.c index 590b038e449e..6b89d596ba9a 100644 --- a/drivers/nfc/virtual_ncidev.c +++ b/drivers/nfc/virtual_ncidev.c @@ -125,6 +125,10 @@ static ssize_t virtual_ncidev_write(struct file *file, kfree_skb(skb); return -EFAULT; } + if (strnlen(skb->data, count) != count) { + kfree_skb(skb); + return -EINVAL; + } nci_recv_frame(vdev->ndev, skb); return count;