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 793A58495 for ; 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> Precedence: bulk X-Mailing-List: ntfs3@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore 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 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