From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f198.google.com (mail-oi1-f198.google.com [209.85.167.198]) (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 41A513537C7 for ; Fri, 17 Apr 2026 16:20:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776442858; cv=none; b=L+r3IAZbl6m9XxV6fL3FuhB+Wy8VRcm9TWLjkRf6SG8yjwqUjhqMzZ9urdnQ78osnvqDvhKPPMKoe4jGnTLiJaIcDPc8N+GMtSrWxlFDl67PHspUIhVAcLKhrHMNr29ALhaSUI5R6YFCEUJPXkguN57wJqdlExgb+M6KOVJPWgE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776442858; c=relaxed/simple; bh=wLnBJ+V3rw23nIjjlUKeaPqrOGWCygNYmlfoMHo85+Q=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=VsJmDgXuPbDJ5DAfzSm14eYA7xUvr7T79fYnndyk3VoW3N/CedVss+LwdLmhIq113cPSGncgB0nUeu73gf1OPT+NFU+Wqh/0wsGfrZTnnc3APcQxodHdsY/ntZz2IPH4Gt4PZ71Z9Mggbq572N2P7/i6/Ck/f9AaxAl7v2HvvA4= 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=209.85.167.198 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-oi1-f198.google.com with SMTP id 5614622812f47-46f083f82c7so3330291b6e.1 for ; Fri, 17 Apr 2026 09:20:55 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776442854; x=1777047654; 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=OEBr4HXKCjPBKpnF/WKizHoU0a0uD2VvleYgEuWRDYo=; b=FrBQk7obu5trjFbK+tWt/wTcUqu1CcvgoFXYLI9/jMwwwSFEldrHw9gW49eSRMWY4D VagVw39XrbsZJWGOCBDK7PZcqjniACEBVssxJUyP1ABHobDLhVCAwMnVW9IB6n9jtOHU EIkCUfTPcRzjT/L6YdEvolj5KSe34kuo9YMoEZRIMCjLcJPijhBNho/N8QdTQwkMggEf xGIe+2MGXUmGk01QQ9RDhBEWLsXYHrIYKyQipLUH5WgYLbCrCSqtMyX8Zc66XQTb1Fkb dbAo8iitqhxnfHKbM6CebhJAe8Mkg6Wjs/SSzWojTZs93jJBW29WDjTSRS9C/OpO/RgK YR/Q== X-Gm-Message-State: AOJu0YwnGEArQFNhjx/AloPDdiGAT6FXllL+fld1IvMvPjWI1h6CcZjA b74qaADhHBiF/26E6HFUV9ZoE7Mkx6ujWAvqd4ntYaSrvA09OGZztGZLugDYHkuwPQxg630uzm3 kfEbqQEha+649hpECtPIkX5JSeOpfFeNEeIlXePeeJNv1goMFU0MLTGhvwFc= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2c09:b0:687:7968:76fb with SMTP id 006d021491bc7-694636b04c6mr1183904eaf.9.1776442853841; Fri, 17 Apr 2026 09:20:53 -0700 (PDT) Date: Fri, 17 Apr 2026 09:20:53 -0700 In-Reply-To: <0000000000001db56d06076f6861@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69e25de5.a00a0220.1bd0ca.000a.GAE@google.com> Subject: Forwarded: Re: [syzbot] KMSAN: uninit-value in hfsplus_cat_read_inode From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [syzbot] KMSAN: uninit-value in hfsplus_cat_read_inode Author: tristmd@gmail.com #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master >>From c548b434d782cb365bfeae52c7278548b16d6e85 Mon Sep 17 00:00:00 2001 From: Tristan Madani Date: Fri, 17 Apr 2026 16:15:17 +0000 Subject: [PATCH] hfsplus: initialize subfolders field when HAS_FOLDER_COUNT is not set hfsplus_cat_read_inode() only initializes the subfolders field when the HFSPLUS_HAS_FOLDER_COUNT flag is set. When it is not set, the field retains stale data from previous use, which KMSAN detects as uninit-value during rename operations. Add an else branch to zero-initialize subfolders when the flag is not set. Reported-by: syzbot+93f4402297a457fc6895@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=93f4402297a457fc6895 Signed-off-by: Tristan Madani --- fs/hfsplus/inode.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c index d05891e..356847a 100644 --- a/fs/hfsplus/inode.c +++ b/fs/hfsplus/inode.c @@ -592,6 +592,8 @@ int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd) if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) { HFSPLUS_I(inode)->subfolders = be32_to_cpu(folder->subfolders); + } else { + HFSPLUS_I(inode)->subfolders = 0; } inode->i_op = &hfsplus_dir_inode_operations; inode->i_fop = &hfsplus_dir_operations; -- 2.47.3