From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 22EEB2AE66 for ; Tue, 12 Mar 2024 13:41:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710250877; cv=none; b=qHqCjSICxJYoT92IXPY+scRlozTEikZR2apDFOJntKlhD7NuZvlpB+i/ABerpUtx6z9DnHOChihvL0PIp167WcEB5G4GE255Mz2EL4BbWGVSuUxWcVIIKjKUv86D/VQeGkSGxbxSAK1IUJA6J0XSQ94mBvxesUahQeFEHpjRBHg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710250877; c=relaxed/simple; bh=PjY9Hx4tOJdG4XqfmaFoKDKo7zwgV5FzXjCGKYeM9Is=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=WB87vn59NWrZbq5ramDp8JQjCOK3IT8dPp6CXt7+DMwPqknY3jObpN7HO+jbKGPPndoufeucReWqMSlnvLhB5FIIqJZiQLacTrMz1Qmxdr9n8FG2xiIbXZ/plSCm0sULKxkL2kE3aNd92u5htZw1LUjl1AnM6S03LhdvMZZXpA8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.200 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f200.google.com with SMTP id e9e14a558f8ab-3665283d42cso24406915ab.2 for ; Tue, 12 Mar 2024 06:41:15 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1710250875; x=1710855675; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=s0AA3R38g+NMxfqYoN/vqX14LWr3c0ZeG2Q50m10+nM=; b=bbGNC7HzWxi/E9vq1gzgP4VsuSHHsx3SMlhXfrU/E3rywuA0UzOZwdWKW9Q2VLXvfR HJaroeIuXzajlK9NqHrjb37+fN5oUa1EjUr4KTKU/biS6pUU1naIIEyvG/+WYCVZowlX Zb2vdSo1jtOGOBlsoEXXAlqL2zeCeK5ak0PETlTiTg77pNk2NHracvmcK+NdopxsOKRo TzCkQL2ShLmZoj0U395hjFGksNrl/g82vEJgUlmSc1bF2bpxkjXQKZ1B3e8RQOvLOCs4 cZtJs1ssB2X64TaraJ95/F+nBKEiSNZQ3gP5IwC06xg6U/pnyKlsAMM2BEef7aBTuJpP RVoA== X-Gm-Message-State: AOJu0Ywd6MzWw2KkK5LHcjiQpAmQspGUdVgIP3J/LbJr7Wxxoe0K/uGl 6tXXvxeUhE6xxEGAorUifJ7Q58/vpunl8yP6DIcXR1vkpFZ33TynUbLveG/6vno6Rzr9AictSLE CBWWdaQE1JQzuLcOO6uQVBg36rvQdxjb9JhaV7tHdub1v8Y9nF+KuZdMXCw== X-Google-Smtp-Source: AGHT+IFsIUqg0/SLj0rWp59RR86LchZSPN/cneAudsbtNkUgubOuZvJ8R30cUXy3lWz6wFNUpQAp1VzQRsMkqNMut2W2DmxvfauX Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:20ec:b0:365:3db4:16eb with SMTP id q12-20020a056e0220ec00b003653db416ebmr14652ilv.3.1710250875148; Tue, 12 Mar 2024 06:41:15 -0700 (PDT) Date: Tue, 12 Mar 2024 06:41:15 -0700 In-Reply-To: <000000000000169132060fc66db3@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e3ef32061376cfac@google.com> Subject: Re: [syzbot] [PATCH] nfc: nci: Fix uninit-value in nci_dev_up From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: [PATCH] nfc: nci: Fix uninit-value in nci_dev_up Author: ryasuoka@redhat.com #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 9f8413c4a66f2fb776d3dc3c9ed20bf435eb305e diff --git a/net/nfc/nci/ntf.c b/net/nfc/nci/ntf.c index 994a0a1efb58..56624387e253 100644 --- a/net/nfc/nci/ntf.c +++ b/net/nfc/nci/ntf.c @@ -765,6 +765,9 @@ void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb) nci_opcode_oid(ntf_opcode), nci_plen(skb->data)); + if (!nci_plen(skb->data)) + goto end; + /* strip the nci control header */ skb_pull(skb, NCI_CTRL_HDR_SIZE);