From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 9CDD520493E; Mon, 28 Oct 2024 10:53:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730112828; cv=none; b=gWS+YP10NqfVBGcT5BTx2OYem3xTNHOxb36UV/bEJ3yC8eEr8H9rcWZZxQllBFJ9CWgWrv+ZOSJrDUK+z7aMoiMiuXE4NPcPtO/1wxsllZL+sNzHEnBfRZax+wpFeCajuNoJQKZ8v+DdOfchDVD0Y3q/bUJg9fWOoLIWvdItwoI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730112828; c=relaxed/simple; bh=iY6hqw+w+5Uk+0uOnHmszNCdRWJRxWBSunc10i/cPdg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SeUYgopsfk7zd5korW6Alhvp8PvtG6B/O6tBsd7N7OW9Y08hfqGeswr4LketkwqEo2y+lw7heCwpRJbFodHqXvcRZy9SBlt7Lla7pLgmA46Asbc8itmUEs7YH0s1lkimEt/4oqlSO/767HsZMW/X9llLXMplzFbxSy+2dyka4m4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=BjCGw/5U; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="BjCGw/5U" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 22959C4CEC3; Mon, 28 Oct 2024 10:53:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730112828; bh=iY6hqw+w+5Uk+0uOnHmszNCdRWJRxWBSunc10i/cPdg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BjCGw/5UXSp2S1lyEGWe4JY0iWeJiXkmgRxiwR4eKwGbEdRlTbNTlnvMjKl+8CLF5 7Ms3XXIqR0l91ubrIFLTtOTak0LAzqDtr33GwlahTY8I783xjBKIfzOWP7pmCu6TSw DuIlnBqz65KAfSnehqivcjQGRWDfeghU/EIQpBPtckwB+bCy2aG1Fr4OxW8vCePsj/ 6r9wxSBl3vlayFPkdvtir7rU5nlQaOXRTUVku4MiHX++X1fRQWART7a9VHPjoDnjNO FqcKxZqg1OFuU1VbK9zknrWC7WP6oQUwkFKYD9gHYWtZCIM1BfHe4F3zIdwQcElFJe zXX+yYYJe9Zmw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Alessandro Zanni , syzbot+6c55f725d1bdc8c52058@syzkaller.appspotmail.com, Jan Kara , Christian Brauner , Sasha Levin , mark@fasheh.com, jlbec@evilplan.org, joseph.qi@linux.alibaba.com, ocfs2-devel@lists.linux.dev Subject: [PATCH AUTOSEL 4.19 2/3] fs: Fix uninitialized value issue in from_kuid and from_kgid Date: Mon, 28 Oct 2024 06:53:42 -0400 Message-ID: <20241028105343.3560809-2-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241028105343.3560809-1-sashal@kernel.org> References: <20241028105343.3560809-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 4.19.322 Content-Transfer-Encoding: 8bit From: Alessandro Zanni [ Upstream commit 15f34347481648a567db67fb473c23befb796af5 ] ocfs2_setattr() uses attr->ia_mode, attr->ia_uid and attr->ia_gid in a trace point even though ATTR_MODE, ATTR_UID and ATTR_GID aren't set. Initialize all fields of newattrs to avoid uninitialized variables, by checking if ATTR_MODE, ATTR_UID, ATTR_GID are initialized, otherwise 0. Reported-by: syzbot+6c55f725d1bdc8c52058@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=6c55f725d1bdc8c52058 Signed-off-by: Alessandro Zanni Link: https://lore.kernel.org/r/20241017120553.55331-1-alessandro.zanni87@gmail.com Reviewed-by: Jan Kara Signed-off-by: Christian Brauner Signed-off-by: Sasha Levin --- fs/ocfs2/file.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index a6f486f4138f5..2ad01ff8c1a8e 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -1143,9 +1143,12 @@ int ocfs2_setattr(struct dentry *dentry, struct iattr *attr) trace_ocfs2_setattr(inode, dentry, (unsigned long long)OCFS2_I(inode)->ip_blkno, dentry->d_name.len, dentry->d_name.name, - attr->ia_valid, attr->ia_mode, - from_kuid(&init_user_ns, attr->ia_uid), - from_kgid(&init_user_ns, attr->ia_gid)); + attr->ia_valid, + attr->ia_valid & ATTR_MODE ? attr->ia_mode : 0, + attr->ia_valid & ATTR_UID ? + from_kuid(&init_user_ns, attr->ia_uid) : 0, + attr->ia_valid & ATTR_GID ? + from_kgid(&init_user_ns, attr->ia_gid) : 0); /* ensuring we don't even attempt to truncate a symlink */ if (S_ISLNK(inode->i_mode)) -- 2.43.0