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 A544428EE for ; Mon, 2 Jan 2023 11:28:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2D72FC433EF; Mon, 2 Jan 2023 11:28:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672658927; bh=RkxLZ62SkT2nkSHzCdxMHLC2+CuVdCg78Uv/39ImUDk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s3tLFRxpa7rgy7MYyyy225TarJIQ2sNbP95vdx9dQFHU4o4OWtt4eIBH/VorJjv7+ xmKGFte1plxRNNUiT+w99DdtmOnw0+QX8YzSk4aRJ9vSflRH3sVb4abOhQGekML80y RXuJB0wVabtdseqbA3zOP4SXds/+NuRkCTOwCaEU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzot , Tetsuo Handa , Konstantin Komarov , Sasha Levin Subject: [PATCH 6.0 35/74] fs/ntfs3: Use __GFP_NOWARN allocation at wnd_init() Date: Mon, 2 Jan 2023 12:22:08 +0100 Message-Id: <20230102110553.583846890@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230102110552.061937047@linuxfoundation.org> References: <20230102110552.061937047@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 087282cb130b..bb29bc1782fb 100644 --- a/fs/ntfs3/bitmap.c +++ b/fs/ntfs3/bitmap.c @@ -661,7 +661,7 @@ 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