rxrpc: Fix checker warnings and errors
Fix various issues detected by checker.
Errors:
(*) rxrpc_discard_prealloc() should be using rcu_assign_pointer to set
call->socket.
Warnings:
(*) rxrpc_service_connection_reaper() should be passing NULL rather than 0 to
trace_rxrpc_conn() as the where argument.
(*) rxrpc_disconnect_client_call() should get its net pointer via the
call->conn rather than call->sock to avoid a warning about accessing
an RCU pointer without protection.
(*) Proc seq start/stop functions need annotation as they pass locks
between the functions.
False positives:
(*) Checker doesn't correctly handle of seq-retry lock context balance in
rxrpc_find_service_conn_rcu().
(*) Checker thinks execution may proceed past the BUG() in
rxrpc_publish_service_conn().
(*) Variable length array warnings from SKCIPHER_REQUEST_ON_STACK() in
rxkad.c.
Signed-off-by: David Howells <[email protected]>
diff --git a/net/rxrpc/proc.c b/net/rxrpc/proc.c
index f79f260..7e45db0 100644
--- a/net/rxrpc/proc.c
+++ b/net/rxrpc/proc.c
@@ -29,6 +29,8 @@ static const char *const rxrpc_conn_states[RXRPC_CONN__NR_STATES] = {
* generate a list of extant and dead calls in /proc/net/rxrpc_calls
*/
static void *rxrpc_call_seq_start(struct seq_file *seq, loff_t *_pos)
+ __acquires(rcu)
+ __acquires(rxnet->call_lock)
{
struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
@@ -45,6 +47,8 @@ static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
+ __releases(rxnet->call_lock)
+ __releases(rcu)
{
struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
@@ -135,6 +139,7 @@ const struct file_operations rxrpc_call_seq_fops = {
* generate a list of extant virtual connections in /proc/net/rxrpc_conns
*/
static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
+ __acquires(rxnet->conn_lock)
{
struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
@@ -151,6 +156,7 @@ static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
}
static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
+ __releases(rxnet->conn_lock)
{
struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
