When binding or unbinding to an address family, the res_id is usually set
to zero. When logging instance 0 already exists and is owned by a different
process, this makes nfunl_recv_config return -EPERM without performing
the bind operation.
Since no operation on the foreign logging instance itself was requested,
this is incorrect. Move bind/unbind commands before the queue instance
permissions checks.
Also remove an incorrect comment.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
u_int16_t group_num = ntohs(nfmsg->res_id);
struct nfulnl_instance *inst;
struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
u_int16_t group_num = ntohs(nfmsg->res_id);
struct nfulnl_instance *inst;
+ struct nfulnl_msg_config_cmd *cmd = NULL;
+ if (nfula[NFULA_CFG_CMD]) {
+ u_int8_t pf = nfmsg->nfgen_family;
+ cmd = nla_data(nfula[NFULA_CFG_CMD]);
+
+ /* Commands without queue context */
+ switch (cmd->command) {
+ case NFULNL_CFG_CMD_PF_BIND:
+ return nf_log_register(pf, &nfulnl_logger);
+ case NFULNL_CFG_CMD_PF_UNBIND:
+ nf_log_unregister_pf(pf);
+ return 0;
+ }
+ }
+
inst = instance_lookup_get(group_num);
if (inst && inst->peer_pid != NETLINK_CB(skb).pid) {
ret = -EPERM;
goto out_put;
}
inst = instance_lookup_get(group_num);
if (inst && inst->peer_pid != NETLINK_CB(skb).pid) {
ret = -EPERM;
goto out_put;
}
- if (nfula[NFULA_CFG_CMD]) {
- u_int8_t pf = nfmsg->nfgen_family;
- struct nfulnl_msg_config_cmd *cmd;
-
- cmd = nla_data(nfula[NFULA_CFG_CMD]);
-
switch (cmd->command) {
case NFULNL_CFG_CMD_BIND:
if (inst) {
switch (cmd->command) {
case NFULNL_CFG_CMD_BIND:
if (inst) {
instance_destroy(inst);
goto out;
instance_destroy(inst);
goto out;
- case NFULNL_CFG_CMD_PF_BIND:
- ret = nf_log_register(pf, &nfulnl_logger);
- break;
- case NFULNL_CFG_CMD_PF_UNBIND:
- /* This is a bug and a feature. We cannot unregister
- * other handlers, like nfnetlink_inst can */
- nf_log_unregister_pf(pf);
- break;
default:
ret = -ENOTSUPP;
break;
default:
ret = -ENOTSUPP;
break;