diff --git a/include/net/genetlink.h b/include/net/genetlink.h index 9ab49bfeae78..51c4e811c01c 100644 --- a/include/net/genetlink.h +++ b/include/net/genetlink.h @@ -137,6 +137,7 @@ struct genl_info { possible_net_t _net; void * user_ptr[2]; struct netlink_ext_ack *extack; + struct mutex fslock; }; static inline struct net *genl_info_net(const struct genl_info *info) diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c index feb54c63a116..abf52285e26a 100644 --- a/net/netlink/genetlink.c +++ b/net/netlink/genetlink.c @@ -1105,6 +1105,7 @@ static int genl_family_rcv_msg_doit(const struct genl_family *family, info.extack = extack; genl_info_net_set(&info, net); memset(&info.user_ptr, 0, sizeof(info.user_ptr)); + mutex_init(&info.fslock); if (ops->pre_doit) { err = ops->pre_doit(ops, skb, &info); diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 34eb2c2cbcde..8d0ac4f699bd 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -1953,11 +1953,11 @@ int nfsd_nl_listener_set_doit(struct sk_buff *skb, struct genl_info *info) struct nfsd_net *nn; int err, rem; - mutex_lock(&nfsd_mutex); + mutex_lock(&info->fslock); err = nfsd_create_serv(net); if (err) { - mutex_unlock(&nfsd_mutex); + mutex_unlock(&info->fslock); return err; } @@ -2080,7 +2080,7 @@ int nfsd_nl_listener_set_doit(struct sk_buff *skb, struct genl_info *info) nfsd_destroy_serv(net); out_unlock_mtx: - mutex_unlock(&nfsd_mutex); + mutex_unlock(&info->fslock); return err; } @@ -2110,7 +2110,7 @@ int nfsd_nl_listener_get_doit(struct sk_buff *skb, struct genl_info *info) goto err_free_msg; } - mutex_lock(&nfsd_mutex); + mutex_lock(&info->fslock); nn = net_generic(genl_info_net(info), nfsd_net_id); /* no nfs server? Just send empty socket list */ @@ -2141,14 +2141,14 @@ int nfsd_nl_listener_get_doit(struct sk_buff *skb, struct genl_info *info) } spin_unlock_bh(&serv->sv_lock); out_unlock_mtx: - mutex_unlock(&nfsd_mutex); + mutex_unlock(&info->fslock); genlmsg_end(skb, hdr); return genlmsg_reply(skb, info); err_serv_unlock: spin_unlock_bh(&serv->sv_lock); - mutex_unlock(&nfsd_mutex); + mutex_unlock(&info->fslock); err_free_msg: nlmsg_free(skb);