api: fix crash when cf removed
cf may be removed when:
1. linux_epoll_input_inline process two EPOLLIN events, firstly a normal
message, secondly reading 0 bytes because of socket client crash, then
cf removed without clear message added to pending event data vectors
before
2. clib_file_write called
Type: fix
@@ -148,6 +148,15 @@ vl_socket_api_send (vl_api_registration_t * rp, u8 * elem)
error = clib_file_write (cf);
unix_save_error (&unix_main, error);
+ /* Make sure cf not removed in clib_file_write */
+ cf = vl_api_registration_file (rp);
+ if (!cf)
+ {
+ clib_warning ("cf removed");
+ vl_msg_api_free ((void *) elem);
+ return;
+ }
+
/* If we didn't finish sending everything, wait for tx space */
if (vec_len (sock_rp->output_vector) > 0
&& !(cf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE))
@@ -629,8 +638,8 @@ vl_api_sock_init_shm_t_handler (vl_api_sock_init_shm_t * mp)
}
if (regp->registration_type != REGISTRATION_TYPE_SOCKET_SERVER)
{
- rv = -31; /* VNET_API_ERROR_INVALID_REGISTRATION */
- goto reply;
+ clib_warning ("Invalid registration");
+ return;
}
/*
@@ -704,6 +713,11 @@ reply:
/* Send the magic "here's your sign (aka fd)" socket message */
cf = vl_api_registration_file (regp);
+ if (!cf)
+ {
+ clib_warning ("cf removed");
+ return;
+ }
/* Wait for reply to be consumed before sending the fd */
while (tries-- > 0)
