From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D8536C53210 for ; Tue, 27 Dec 2022 20:41:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232936AbiL0UlA (ORCPT ); Tue, 27 Dec 2022 15:41:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48168 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232776AbiL0Uiy (ORCPT ); Tue, 27 Dec 2022 15:38:54 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4949BE0ED; Tue, 27 Dec 2022 12:34:58 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 0AFF56123D; Tue, 27 Dec 2022 20:34:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BF6F3C433D2; Tue, 27 Dec 2022 20:34:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1672173291; bh=0jM4yyYc3KaGukPdVUK0l6Bb0E5LPX33NldHIMw5RAw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S33Gw8Fkr+IrsMwYR2vkuDsyyvFSQF59pFWkZHhp2Sji0IpuTCcILr5Y/3JG1vWBc u451POcONqw2jtv9prt3IKuk7edsnvn1gKGBKewrtGYNAFaEZYTyAjX81f9WYG1CFi 4vk8QuGrn9g7a+g5dc+mUpi77hHOVSiKBIqBwatjLDSkd/RzhIIDUvYoAd9ubZp/uq lyaQDRptdE200DGtCO6qoEltT5Ux+W1WF8qHHFzMHAvTeCsGtjpRfn4n+ZVg0fF0aY VKA3Fjlr2HJyna32ZEqGiv3ed1XiPNrV0IdmZ3m7+AwvbRa9pRCIAzzxTcmyBD5SIz sSv6eWuwjGhzg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tetsuo Handa , syzot , Konstantin Komarov , Sasha Levin , ntfs3@lists.linux.dev Subject: [PATCH AUTOSEL 5.15 14/22] fs/ntfs3: Use __GFP_NOWARN allocation at ntfs_fill_super() Date: Tue, 27 Dec 2022 15:34:24 -0500 Message-Id: <20221227203433.1214255-14-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221227203433.1214255-1-sashal@kernel.org> References: <20221227203433.1214255-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tetsuo Handa [ Upstream commit 59bfd7a483da36bd202532a3d9ea1f14f3bf3aaf ] syzbot is reporting too large allocation at ntfs_fill_super() [1], for a crafted filesystem can contain bogus inode->i_size. Add __GFP_NOWARN in order to avoid too large allocation warning, than exhausting memory by using kvmalloc(). Link: https://syzkaller.appspot.com/bug?extid=33f3faaa0c08744f7d40 [1] Reported-by: syzot Signed-off-by: Tetsuo Handa Signed-off-by: Konstantin Komarov Signed-off-by: Sasha Levin --- fs/ntfs3/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c index 25a9b3691033..0d1093e9682f 100644 --- a/fs/ntfs3/super.c +++ b/fs/ntfs3/super.c @@ -1136,7 +1136,7 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc) goto put_inode_out; } bytes = inode->i_size; - sbi->def_table = t = kmalloc(bytes, GFP_NOFS); + sbi->def_table = t = kmalloc(bytes, GFP_NOFS | __GFP_NOWARN); if (!t) { err = -ENOMEM; goto put_inode_out; -- 2.35.1