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 BA711C10F1B for ; Tue, 27 Dec 2022 20:41:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232925AbiL0Ukt (ORCPT ); Tue, 27 Dec 2022 15:40:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48088 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232775AbiL0Uiy (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 C3A61E0E7; Tue, 27 Dec 2022 12:34:57 -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 E1E3161241; Tue, 27 Dec 2022 20:34:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A17BCC43392; Tue, 27 Dec 2022 20:34:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1672173290; bh=yz8ACh6OsI/ZD9bQhVfiEFQYhY+mPlVOWuQ7QbjLCG8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rF+HbN4vkaJkT44pYfxBi9OaIqb1g+OGP+0AQkevPJALr2wmfM6EFYueKFJC4TAg0 aUPECIsHWfgmbVho8ICgFaMx/hzt+uPt1K0zsWrvxstP+8NYpOymw2g9HTsJUivSVa nR4bMuTQKFntvVerKWtaW9h4EujRQz7U3FOOvEgOEiCfTvo78UNrwe3PqJuBpIdQ8n MltwWeslaMlqUzq4E8eh5vo/6eNQC69NjXTA9ZiilzeT+/neCUp6KCMnkk/yEGVC1K KzSw1Uw+EQBIDKRenZzuMbbdgdAFMwgn9twMGDETZWeZl0xjJ6QlEUn51ScY8Bzohe WtHoCdmvGNoGQ== 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 13/22] fs/ntfs3: Use __GFP_NOWARN allocation at wnd_init() Date: Tue, 27 Dec 2022 15:34:23 -0500 Message-Id: <20221227203433.1214255-13-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 0d0f659bf713662fabed973f9996b8f23c59ca51 ] syzbot is reporting too large allocation at wnd_init() [1], for a crafted filesystem can become wnd->nwnd close to UINT_MAX. Add __GFP_NOWARN in order to avoid too large allocation warning, than exhausting memory by using kvcalloc(). Link: https://syzkaller.appspot.com/bug?extid=fa4648a5446460b7b963 [1] Reported-by: syzot Signed-off-by: Tetsuo Handa Signed-off-by: Konstantin Komarov Signed-off-by: Sasha Levin --- fs/ntfs3/bitmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ntfs3/bitmap.c b/fs/ntfs3/bitmap.c index aa184407520f..021b5738eca3 100644 --- a/fs/ntfs3/bitmap.c +++ b/fs/ntfs3/bitmap.c @@ -666,7 +666,7 @@ int wnd_init(struct wnd_bitmap *wnd, struct super_block *sb, size_t nbits) if (!wnd->bits_last) wnd->bits_last = wbits; - wnd->free_bits = kcalloc(wnd->nwnd, sizeof(u16), GFP_NOFS); + wnd->free_bits = kcalloc(wnd->nwnd, sizeof(u16), GFP_NOFS | __GFP_NOWARN); if (!wnd->free_bits) return -ENOMEM; -- 2.35.1