From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out162-62-57-252.mail.qq.com (out162-62-57-252.mail.qq.com [162.62.57.252]) (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 874A710A00 for ; Thu, 28 Dec 2023 22:06:15 +0000 (UTC) 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="tJEcP401" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qq.com; s=s201512; t=1703800865; bh=FbL3XUQGG36I/6CQH5chH65yLqnCzzZleBtliZ9ep7U=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=tJEcP401mJjpcbXt420oAZpUf1FU2VZx8zswdQH0x4WEFsc97949GCf6Dg+9O48WG tF+rX5VJjyLXIT47jlEin2LE7ZJbxStcAhqWo9jVIrzkMoyToZE2j6oF6bRsoZCP0B 7qGwSxpj1rTdx8+yQMAbVg3kRfkVCUcvejOsgiTs= Received: from pek-lxu-l1.wrs.com ([2408:8409:7810:45b:788d:ee9e:1fba:da17]) by newxmesmtplogicsvrszc5-1.qq.com (NewEsmtp) with SMTP id 431E6FF; Fri, 29 Dec 2023 06:01:03 +0800 X-QQ-mid: xmsmtpt1703800863tzhjl841d Message-ID: X-QQ-XMAILINFO: MeB5Wo+JmnrbHp8YhYt8pWysVqY3GasZv29YWYaWew/nKzDLAGXgaDJ5CvCkaR 3mYZFkcuVzwPo2b4UME4SEAQTfA57bazxtsI6vwJpC2SjLbMiKjrzrpuyjTPL/8UBgjUmX5g4P+B NUJKwXAxa+n+tbPJanGMJAKE1dB6VTEQD9DEYxz/1eBtfL4aI+xJOX0J3eO6zQbL9Vc/ovNez5ka 1c7YpQBwsTLtbNzay3GvE2O+izAGLkfOoPZ4IasOv95vAtbAyEktobET/V298kYsB6y4Hokx4guO 2sxO4toPPYvlsfoe9rxoT3XrxBg3hbxToPyD6xjR9xoU7f0mydiDNdxB4GtjfzlNui92jbfU027P VbMFoA5yKrRpgiGLhaE9ABmeLaWVR12u4+oAQi5bfxGchYeTDhceox3Zh+qTASOXlDhqlnzahR3X xcnuaw8pWireTRwcxTYHDn1Yky2fxBZ0xXYaRif5k9zkix5TbgPHiS8z7M03tLUR4OFeY5eFdk3A 8+DRg5tDYUV6fxZ1xpX1ue4uHHT9z3dJdoqYOgs4hE/tdfLTh2Gs8HAeUv3Bp66tpFrPbqIHhdOu 4Jgj5e4getyNtXhbvrBG96Cd7nJ4MP2k92RvmZh15IvNMZB9RKm+eWlp75jrR1OzZFFTCM5xitg9 onMog4s3OduCBDdoBXWNlPM23k/FIhG2bNN/7U4RWU4pQ2CTO7TLKp65elHYHK9C8NeFKndW1XWP FV39W1Rf9HCWVctxNfsCiLLi3ELdsvSqYAL1fQ8JoWP9T2WNQkXeZ5D02CVMdYNgrElWrXjvi4VG swBNHZD1QPlkvYUWkuwS7e/oHCxideSvtCB+Cp97vxTmHeQcRALKtOwwO5F/8Fe7FrwO97/MQz2h 9e41k4M2JqrJMFX5FzlSrt/OsqeFJEDxHKwNFgzKHNmZNHS796BDeD5bT41xWklWJlDS3AzKwR X-QQ-XMRINFO: MSVp+SPm3vtS1Vd6Y4Mggwc= From: Edward Adam Davis To: syzbot+55ad87f38795d6787521@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [hfs?] KMSAN: uninit-value in __hfsplus_ext_cache_extent Date: Fri, 29 Dec 2023 06:01:03 +0800 X-OQ-MSGID: <20231228220102.215226-2-eadavis@qq.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <0000000000002cf943060d8f4e3c@google.com> References: <0000000000002cf943060d8f4e3c@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 uninit-value in __hfsplus_ext_cache_extent #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git fbafc3e621c3 diff --git a/fs/hfsplus/bfind.c b/fs/hfsplus/bfind.c index ca2ba8c9f82e..9d4ffff6d42e 100644 --- a/fs/hfsplus/bfind.c +++ b/fs/hfsplus/bfind.c @@ -23,6 +23,7 @@ int hfs_find_init(struct hfs_btree *tree, struct hfs_find_data *fd) return -ENOMEM; fd->search_key = ptr; fd->key = ptr + tree->max_key_len + 2; + fd->key->ext.fork_type = 0; hfs_dbg(BNODE_REFS, "find_init: %d (%p)\n", tree->cnid, __builtin_return_address(0)); switch (tree->cnid) { diff --git a/fs/hfsplus/extents.c b/fs/hfsplus/extents.c index 3c572e44f2ad..6681e3a24f29 100644 --- a/fs/hfsplus/extents.c +++ b/fs/hfsplus/extents.c @@ -206,7 +206,7 @@ static inline int __hfsplus_ext_cache_extent(struct hfs_find_data *fd, static int hfsplus_ext_read_extent(struct inode *inode, u32 block) { struct hfsplus_inode_info *hip = HFSPLUS_I(inode); - struct hfs_find_data fd; + struct hfs_find_data fd = { 0 }; int res; if (block >= hip->cached_start &&