From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794061495; b=mIqhTR2Q+SnUuhdcA62nx42LWmfP1eSVaZsEr4610xoAsi21p3dT7zTwiC2Xb95PJX2B k9OUjADV2VTojtHJeVVQo41GAL7Fez9O5NxAuId/HQtqKaMLbUVxGNrGzQxcQN9i55sMh n+RBLzZ4s4MSpMTFsJzxY9tErehu/7k4GYcght98vFvifVmhsdc6c01BzXmGQL1C5+oxf WXYti9dnu8GVolFE1PvgK8nslzHQu30LT8x93ZKwdzPUoKkjQKYRJePzHmJDjfHgHbevE J+rcp+NTzu1A/nWdILzdXCSyELbH3ISF0kNqBfRcSweT22o6rFEjNfoAtFMrbwbJuEw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794061495; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=pAlKWXTqmX7llaOd9x7e9LMcRcYFBk7Mkox6k3Aj3f0=; b=AqnM20BMajEYcM4fNjA+QrAvqnZ9T5O84qk7Hagz5ML15zLy+b8US2YR9iFJFBxNmpZO DweJqbLtyiPhP1hR+0x2uk0ubnyyvQRXb9dlRiDdBazH07a0vBWogt0Q5sV/yjQWfEjnp Fk/St+QVfA8q+OyOz556hkP3QwefgXvnue4hLir4yDzGnfJVvx+X0oKjuZfFkorud3bz/ vdWZ6+A9mghlz2nF6KzkGbrmvNFTDp8lmZ5peiKdIyLD6XJZ6R8RaYbXLU8fVEAZgvMNk +d4etF4fpR9TnxkKRyHHI7Mo0/Mq6vCFZAgJP9R0f2d5L9logrZbTa3o988GSO+fmPQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=mh8UKPIX; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2607B606A331; Sat, 7 Nov 2026 14:24:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=mh8UKPIX Received: by smtp.kernel.org (Postfix) with ESMTPSA id BF0E41F0089F; Sat, 7 Nov 2026 14:24:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794061495; bh=pAlKWXTqmX7llaOd9x7e9LMcRcYFBk7Mkox6k3Aj3f0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=mh8UKPIX9UEtUUPWu9PHCTqw8IjGGkhqhLDoWeXkC8bw1+uniTlKktuPKXpVJSiOq HW6gbk9mwsa9m8usHhrxoYIUoc24tng26VDMGkhs2S4ari5bA8+bxVKFYW95njy42o cyKph/a5qqw1fq3UkbQ+VJz1qIQrmVb0pBYS+0ss= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, DaeMyung Kang , Namjae Jeon Subject: [PATCH 6.12 0591/1536] ksmbd: return end of file for reads past a named streams data Date: Sat, 7 Nov 2026 08:43:27 -0500 Message-ID: <20261107135014.132585102@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134957.653319350@linuxfoundation.org> References: <20261107134957.653319350@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: DaeMyung Kang commit 626611dc22a3b63b3264a7a797d9dbc530234fcd upstream. A READ on a non-empty named stream at or beyond its end fails with STATUS_INVALID_PARAMETER. ksmbd_vfs_stream_read() returns -EINVAL when the offset is not below the stream length, and smb2_read() maps -EINVAL to that status. smb2_read() already turns a zero-byte read into STATUS_END_OF_FILE, the status a regular file returns at its end, and an empty stream already takes that path. Return 0 instead of -EINVAL so that non-empty streams do the same. Clients that read a stream until end of file otherwise get an error once they have read all of its data. The buffered copychunk path converts a zero-byte source read to -EIO, as it does for a regular file that shrinks during copying. Fixes: 2ae1a6cc4302 ("cifsd: fix potential read overflow in ksmbd_vfs_stream_read()") Cc: stable@vger.kernel.org Signed-off-by: DaeMyung Kang Signed-off-by: Namjae Jeon Signed-off-by: Greg Kroah-Hartman --- fs/smb/server/vfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/smb/server/vfs.c +++ b/fs/smb/server/vfs.c @@ -299,7 +299,7 @@ static int ksmbd_vfs_stream_read(struct return (int)v_len; if (v_len <= *pos) { - count = -EINVAL; + count = 0; goto free_buf; }