From: Namjae Jeon <linkinjeon@kernel.org> stable inclusion from stable-v6.6.103 commit d9e157fcfebc126cd19b2333a6417a840c24e529 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICT9UF CVE: CVE-2025-38501 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- commit c0d41112f1a5828c194b59cca953114bc3776ef2 upstream. Update the connection tracking logic to handle both IPv4 and IPv6 address families. Cc: stable@vger.kernel.org Fixes: e6bb91939740 ("ksmbd: limit repeated connections from clients with the same IP") Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Yongjian Sun <sunyongjian1@huawei.com> --- fs/smb/server/connection.h | 7 ++++++- fs/smb/server/transport_tcp.c | 26 +++++++++++++++++++++++--- 2 files changed, 29 insertions(+), 4 deletions(-) diff --git a/fs/smb/server/connection.h b/fs/smb/server/connection.h index 70edeff46165..143f10afc6f5 100644 --- a/fs/smb/server/connection.h +++ b/fs/smb/server/connection.h @@ -45,7 +45,12 @@ struct ksmbd_conn { struct mutex srv_mutex; int status; unsigned int cli_cap; - __be32 inet_addr; + union { + __be32 inet_addr; +#if IS_ENABLED(CONFIG_IPV6) + u8 inet6_addr[16]; +#endif + }; char *request_buf; struct ksmbd_transport *transport; struct nls_table *local_nls; diff --git a/fs/smb/server/transport_tcp.c b/fs/smb/server/transport_tcp.c index 84bc283e5689..7012a50f9bcb 100644 --- a/fs/smb/server/transport_tcp.c +++ b/fs/smb/server/transport_tcp.c @@ -87,7 +87,14 @@ static struct tcp_transport *alloc_transport(struct socket *client_sk) return NULL; } +#if IS_ENABLED(CONFIG_IPV6) + if (client_sk->sk->sk_family == AF_INET6) + memcpy(&conn->inet6_addr, &client_sk->sk->sk_v6_daddr, 16); + else + conn->inet_addr = inet_sk(client_sk->sk)->inet_daddr; +#else conn->inet_addr = inet_sk(client_sk->sk)->inet_daddr; +#endif conn->transport = KSMBD_TRANS(t); KSMBD_TRANS(t)->conn = conn; KSMBD_TRANS(t)->ops = &ksmbd_tcp_transport_ops; @@ -227,7 +234,6 @@ static int ksmbd_kthread_fn(void *p) { struct socket *client_sk = NULL; struct interface *iface = (struct interface *)p; - struct inet_sock *csk_inet; struct ksmbd_conn *conn; int ret; @@ -250,13 +256,27 @@ static int ksmbd_kthread_fn(void *p) /* * Limits repeated connections from clients with the same IP. */ - csk_inet = inet_sk(client_sk->sk); down_read(&conn_list_lock); list_for_each_entry(conn, &conn_list, conns_list) - if (csk_inet->inet_daddr == conn->inet_addr) { +#if IS_ENABLED(CONFIG_IPV6) + if (client_sk->sk->sk_family == AF_INET6) { + if (memcmp(&client_sk->sk->sk_v6_daddr, + &conn->inet6_addr, 16) == 0) { + ret = -EAGAIN; + break; + } + } else if (inet_sk(client_sk->sk)->inet_daddr == + conn->inet_addr) { + ret = -EAGAIN; + break; + } +#else + if (inet_sk(client_sk->sk)->inet_daddr == + conn->inet_addr) { ret = -EAGAIN; break; } +#endif up_read(&conn_list_lock); if (ret == -EAGAIN) continue; -- 2.39.2