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Fix a potential null pointer acceess issue. #1854

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It's possible that c-ares calls the callback function immediately in ares_gethostbyname, which may free the server
structure in that callback function.
This commit is contained in:
Max Lv
2017-12-27 21:47:28 -08:00
parent a18b2e5eb0
commit 57ab828ba1
1 changed files with 2 additions and 2 deletions
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src/server.c
+2 -2
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@@ -903,6 +903,8 @@ server_recv_cb(EV_P_ ev_io *w, int revents)
ev_io_start(EV_A_ & remote->send_ctx->io);
}
} else {
ev_io_stop(EV_A_ & server_recv_ctx->io);
query_t *query = ss_malloc(sizeof(query_t));
memset(query, 0, sizeof(query_t));
query->server = server;
@@ -920,8 +922,6 @@ server_recv_cb(EV_P_ ev_io *w, int revents)
close_and_free_server(EV_A_ server);
return;
}
ev_io_stop(EV_A_ & server_recv_ctx->io);
}
return;