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 AB73228EE for ; Mon, 2 Jan 2023 11:29:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0734FC433D2; Mon, 2 Jan 2023 11:29:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672658956; bh=eyeVpSgs7yyNN4VmDie4YgP3ASJGu3G+9zEUJiQqs5M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=L1vsgR8aulcDi9A14ymAS7rynYqabj2oYh7tQJz+sBSdqQkimuGM+EnyR8n92uj9w KDfPGqnOOtYOwKeMaG9BPrven43NXaJ1Xk1nzawpy0rPccD65CZbz1kzJQ6i3kCXS2 PsGb7DD7RVpMCea2rB/YaKhwaNoir8PDfqU6He10= 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 36/74] fs/ntfs3: Use __GFP_NOWARN allocation at ntfs_fill_super() Date: Mon, 2 Jan 2023 12:22:09 +0100 Message-Id: <20230102110553.635406796@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 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 94f9e4b775a7..8e2fe0f69203 100644 --- a/fs/ntfs3/super.c +++ b/fs/ntfs3/super.c @@ -1141,7 +1141,7 @@ 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