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 0484336124; Wed, 30 Jul 2025 09:41:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753868506; cv=none; b=ltJr7eR5JwDQ27wMy/vNwJYnGkkeRGy9nzOoSdOEi05DmqWdYGU/pQVoGpg/FtD8PVhUclkPfPg8iLt+BHKyi/NCEsq7VvgjJZcphlWRoH26B4Lxg5pG+MulZIqg3P9cKQvwMtiDR1KsQ7qqZ0Unv4pde051UG02zo+XQv+nl7c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753868506; c=relaxed/simple; bh=NBbO+TIM8NLj72+UkXFmKQJ3L4JlUkWnrr4cBgcscEE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dd+Po7xJBXYodQ7170yOg0Ofkt3bU+2+ghg4WWrRR4X2DsLLu8RtgmEKXMIKKWmPvUSjYNV/KwD1E6MH0L6ibfNV76K5PghVCTK4uCVpVKO5I4W5mMeGE9fuqFBDXo7y0B2j8EEZ+gCHWeFQNh8SnteViiBZlKnnSrf7pQA5vyA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=b2qOuENB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="b2qOuENB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 848D1C4CEE7; Wed, 30 Jul 2025 09:41:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1753868505; bh=NBbO+TIM8NLj72+UkXFmKQJ3L4JlUkWnrr4cBgcscEE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b2qOuENB4x8oVn+3EdyNXmX99cocqJNQGIIZDUXRMNy1CctbC6Bz7USwifeh+Yw6H R4u20X8jLO8f+dJu8jfd+BeU4ITEvNBFNaYtJldPsLmbSnNVB+B83DoVyNgwmERuaC OAqWSOUUJ1MkTYdtvkjySwHSsi7LxuO4wZKRBPwc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stefan Metzmacher , Namjae Jeon , Steve French Subject: [PATCH 6.6 68/76] ksmbd: add free_transport ops in ksmbd connection Date: Wed, 30 Jul 2025 11:36:01 +0200 Message-ID: <20250730093229.504744410@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250730093226.854413920@linuxfoundation.org> References: <20250730093226.854413920@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Namjae Jeon commit a89f5fae998bdc4d0505306f93844c9ae059d50c upstream. free_transport function for tcp connection can be called from smbdirect. It will cause kernel oops. This patch add free_transport ops in ksmbd connection, and add each free_transports for tcp and smbdirect. Fixes: 21a4e47578d4 ("ksmbd: fix use-after-free in __smb2_lease_break_noti()") Reviewed-by: Stefan Metzmacher Signed-off-by: Namjae Jeon Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman --- fs/smb/server/connection.c | 2 +- fs/smb/server/connection.h | 1 + fs/smb/server/transport_rdma.c | 10 ++++++++-- fs/smb/server/transport_tcp.c | 3 ++- 4 files changed, 12 insertions(+), 4 deletions(-) --- a/fs/smb/server/connection.c +++ b/fs/smb/server/connection.c @@ -40,7 +40,7 @@ void ksmbd_conn_free(struct ksmbd_conn * kvfree(conn->request_buf); kfree(conn->preauth_info); if (atomic_dec_and_test(&conn->refcnt)) { - ksmbd_free_transport(conn->transport); + conn->transport->ops->free_transport(conn->transport); kfree(conn); } } --- a/fs/smb/server/connection.h +++ b/fs/smb/server/connection.h @@ -132,6 +132,7 @@ struct ksmbd_transport_ops { void *buf, unsigned int len, struct smb2_buffer_desc_v1 *desc, unsigned int desc_len); + void (*free_transport)(struct ksmbd_transport *kt); }; struct ksmbd_transport { --- a/fs/smb/server/transport_rdma.c +++ b/fs/smb/server/transport_rdma.c @@ -158,7 +158,8 @@ struct smb_direct_transport { }; #define KSMBD_TRANS(t) ((struct ksmbd_transport *)&((t)->transport)) - +#define SMBD_TRANS(t) ((struct smb_direct_transport *)container_of(t, \ + struct smb_direct_transport, transport)) enum { SMB_DIRECT_MSG_NEGOTIATE_REQ = 0, SMB_DIRECT_MSG_DATA_TRANSFER @@ -409,6 +410,11 @@ err: return NULL; } +static void smb_direct_free_transport(struct ksmbd_transport *kt) +{ + kfree(SMBD_TRANS(kt)); +} + static void free_transport(struct smb_direct_transport *t) { struct smb_direct_recvmsg *recvmsg; @@ -455,7 +461,6 @@ static void free_transport(struct smb_di smb_direct_destroy_pools(t); ksmbd_conn_free(KSMBD_TRANS(t)->conn); - kfree(t); } static struct smb_direct_sendmsg @@ -2301,4 +2306,5 @@ static struct ksmbd_transport_ops ksmbd_ .read = smb_direct_read, .rdma_read = smb_direct_rdma_read, .rdma_write = smb_direct_rdma_write, + .free_transport = smb_direct_free_transport, }; --- a/fs/smb/server/transport_tcp.c +++ b/fs/smb/server/transport_tcp.c @@ -93,7 +93,7 @@ static struct tcp_transport *alloc_trans return t; } -void ksmbd_free_transport(struct ksmbd_transport *kt) +static void ksmbd_tcp_free_transport(struct ksmbd_transport *kt) { struct tcp_transport *t = TCP_TRANS(kt); @@ -659,4 +659,5 @@ static struct ksmbd_transport_ops ksmbd_ .read = ksmbd_tcp_read, .writev = ksmbd_tcp_writev, .disconnect = ksmbd_tcp_disconnect, + .free_transport = ksmbd_tcp_free_transport, };