From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out162-62-57-210.mail.qq.com (out162-62-57-210.mail.qq.com [162.62.57.210]) (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 E9B93824A3 for ; Wed, 6 Nov 2024 06:40:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=162.62.57.210 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730875235; cv=none; b=bonZ4+EX8J1DObWwyPYRGM5/oPMrOndaLIoEYHk8i+J16xQSFFRH/OcZJZ0w46akyDgciWluX9Uoo28UbWGV3vBwqcu8i3GXEi4X90asbIZxadChONREOY9W1MfcrjsVUXxKKYi/yV5BWF1y+mWbPG2671z+pHHrKBv0WE0DktQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730875235; c=relaxed/simple; bh=rz9S3ScpICYzE+0PGpF+JEkPkOVUE3qh6SphvrTPkIs=; h=Message-ID:From:To:Cc:Subject:Date:In-Reply-To:References: MIME-Version; b=oat2cUR15Hpd4Qvm+F5Q3ZvLsf9LMCOW+nRPzVZ8NoVNNVN53S29iCfc+jKdLyD/PH+g/EdaIjWAjfwx2ZtUXcHAulQlV9Uws9MC2CGEBXgsRZCvOMfXluL9taUEAH49Cdd3ZA6PgEoAVy1xDkHvIfmcvRKb6SmGA6UPOWDfe3g= 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=MXoHcu3W; arc=none smtp.client-ip=162.62.57.210 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="MXoHcu3W" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qq.com; s=s201512; t=1730875212; bh=aYZep8nd9xbQMiAZljVVU/z/rQgJ00os6jqqil7+Yug=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=MXoHcu3WOzEp+e6FyztDbXdqBAUOHivW7s/NvQi66giIkp75MFmmkzShsDb3LSAoP S8hgCkJXoiXo4VuwreHDiTuwnREWgF3aI0dfVyn2UrqMHW7Obyu6JBe7Oc/p+XyyyS psdHiBd5TrFHeOIojPMbaz8u5TyaFm98AZ3zsryQ= Received: from pek-lxu-l1.wrs.com ([111.198.227.254]) by newxmesmtplogicsvrszb20-0.qq.com (NewEsmtp) with SMTP id 7EF9B233; Wed, 06 Nov 2024 14:31:47 +0800 X-QQ-mid: xmsmtpt1730874707tvf178do1 Message-ID: X-QQ-XMAILINFO: OGZxhFXqN7PJO9fwN0NmcXGeuJ6O3N/FXdmxc249bYjKYvjMH5z93ggepz2Htz qHg5NSL+x3P+MD/lsfms1hqIc32hyQVe+TRptdicGOpDUx3iopa7665QbOpBN7lCw4D9sTWxYQgd 9Eh8oS/D5ECRHYUzVPzA9CvJDkdDpRFWGo9fD79twTSDdyKUydUrjU/ajvp8jC2h1P3w8nEiifke X++Kn0Fzn2WH25WHBRJVyhgsgYJ40MzNQ3g9GZJUTv/p3SsVSn0Xvy1v+8TAmhh+Qph39uMQkwae hX4NC/Su19yoROhVvvfMBQsZHTD2YYlMLMK3EZjqM0TZ0mZhRlSZzoSSuOloU6DH7Bu3EndxqVuu 67nwdgzgY7/F2FBX6tQjKYbRF538KN+A42yP9X+BCgetzJmcCT0IAn5psMLPC5pXVZz6rjLHb8uf Cnl3KfzF/qz0WyouJzyhIU0IkCr8MZ3p7gPAhpfNj7+UA+UVEXLoBhvf+jSYQNcKFDjc11qPtniD JWOAtFpPxSkNZjhmFwhUCZwZQD7pFEfOfjMsrlI8p55JprigIVu3OXkDlJLSkrX2EMrBx+k/FePz 0jMvA2SMdjk/yiclLZEGZr6YD61Dk2JcUxIaRbcmtbuMrXdhV/L8sKRlpLapEsrIqTSbpPQuiSkx Q2Wf6bBgfedO5ZKh14gseWk+xj75UaVz+JFBuTCjjkNh7CANDCKmWXCdQvuyF7BbpaPDWRdjA7DM 8RpJf7PQ2Mk+Z3cBF9XBSNfFpxgiZDjDH9oVFLmrQSWKt1Pq+6/K4l3UpvRz1FFegA4wyQiRUJ02 0Etj7DjbOFokE3nvX4pKm542+xBn29tlZn7fuXlsngsyJQwGrKhBL3Y3WPRdTwEkXtYcUYzRD6cK Gq0OLAMaBQDK6I/2sUtLaxr4WuKh8NqazcvvjqCFHc X-QQ-XMRINFO: MSVp+SPm3vtS1Vd6Y4Mggwc= From: Edward Adam Davis To: syzbot+968ecf5dc01b3e0148ec@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [hfs?] KMSAN: uninit-value in hfsplus_cat_bin_cmp_key Date: Wed, 6 Nov 2024 14:31:48 +0800 X-OQ-MSGID: <20241106063147.2500734-2-eadavis@qq.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <672af85a.050a0220.2edce.151c.GAE@google.com> References: <672af85a.050a0220.2edce.151c.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 bnode's record key length is smaller than 8? #syz test diff --git a/fs/hfsplus/bfind.c b/fs/hfsplus/bfind.c index 901e83d65d20..70deb143e518 100644 --- a/fs/hfsplus/bfind.c +++ b/fs/hfsplus/bfind.c @@ -116,7 +116,8 @@ int __hfs_brec_find(struct hfs_bnode *bnode, struct hfs_find_data *fd, rec = (e + b) / 2; len = hfs_brec_lenoff(bnode, rec, &off); keylen = hfs_brec_keylen(bnode, rec); - if (keylen == 0) { + printk("keylen: %u, off: %u, key: %p, %s\n", keylen, off, fd->key, __func__); + if (keylen < 8) { res = -EINVAL; goto fail; }