tc: f_u32: fix json object leak

Previously, the code returned directly within the switch statement in
the functions print_{ipv4, ipv6}. While this approach was functional,
after the commit 721435dc, we can no longer return directly because we
need to close the match object. To resolve this issue, replace the return
statement with break.

Fixes: 721435dcfd92 ("tc: u32: add json support in `print_raw`, `print_ipv4`, `print_ipv6`")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

diff --git a/tc/f_u32.c b/tc/f_u32.c
index de2d0c9efdad60353797dffeec186f93f46a063c..936dbd65d57e2f328b8d3e14324a4251bd52bf22 100644 (file)
--- a/tc/f_u32.c
+++ b/tc/f_u32.c
@@ -828,12 +828,12 @@ static void print_ipv4(FILE *f, const struct tc_u32_key *key)
                        print_nl();
                        print_uint(PRINT_ANY, "ip_ihl", "  match IP ihl %u",
                                   ntohl(key->val) >> 24);
-                       return;
+                       break;
                case 0x00ff0000:
                        print_nl();
                        print_0xhex(PRINT_ANY, "ip_dsfield", "  match IP dsfield %#x",
                                    ntohl(key->val) >> 16);
-                       return;
+                       break;
                }
                break;
        case 8:
@@ -841,7 +841,6 @@ static void print_ipv4(FILE *f, const struct tc_u32_key *key)
                        print_nl();
                        print_int(PRINT_ANY, "ip_protocol", "  match IP protocol %d",
                                  ntohl(key->val) >> 16);
-                       return;
                }
                break;
        case 12:
@@ -864,7 +863,6 @@ static void print_ipv4(FILE *f, const struct tc_u32_key *key)
                                print_string(PRINT_ANY, "address", "%s", addr);
                                print_int(PRINT_ANY, "prefixlen", "/%d", bits);
                                close_json_object();
-                               return;
                        }
                }
                break;
@@ -874,19 +872,19 @@ static void print_ipv4(FILE *f, const struct tc_u32_key *key)
                case 0x0000ffff:
                        print_uint(PRINT_ANY, "dport", "match dport %u",
                                   ntohl(key->val) & 0xffff);
-                       return;
+                       break;
                case 0xffff0000:
                        print_nl();
                        print_uint(PRINT_ANY, "sport", "  match sport %u",
                                   ntohl(key->val) >> 16);
-                       return;
+                       break;
                case 0xffffffff:
                        print_nl();
                        print_uint(PRINT_ANY, "dport", "  match dport %u, ",
                                   ntohl(key->val) & 0xffff);
                        print_uint(PRINT_ANY, "sport", "match sport %u",
                                   ntohl(key->val) >> 16);
-                       return;
+                       break;
                }
                /* XXX: Default print_raw */
        }
@@ -905,12 +903,12 @@ static void print_ipv6(FILE *f, const struct tc_u32_key *key)
                        print_nl();
                        print_uint(PRINT_ANY, "ip_ihl", "  match IP ihl %u",
                                   ntohl(key->val) >> 24);
-                       return;
+                       break;
                case 0x00ff0000:
                        print_nl();
                        print_0xhex(PRINT_ANY, "ip_dsfield", "  match IP dsfield %#x",
                                    ntohl(key->val) >> 16);
-                       return;
+                       break;
                }
                break;
        case 8:
@@ -918,7 +916,6 @@ static void print_ipv6(FILE *f, const struct tc_u32_key *key)
                        print_nl();
                        print_int(PRINT_ANY, "ip_protocol", "  match IP protocol %d",
                                  ntohl(key->val) >> 16);
-                       return;
                }
                break;
        case 12:
@@ -941,7 +938,6 @@ static void print_ipv6(FILE *f, const struct tc_u32_key *key)
                                print_string(PRINT_ANY, "address", "%s", addr);
                                print_int(PRINT_ANY, "prefixlen", "/%d", bits);
                                close_json_object();
-                               return;
                        }
                }
                break;
@@ -952,11 +948,11 @@ static void print_ipv6(FILE *f, const struct tc_u32_key *key)
                        print_nl();
                        print_uint(PRINT_ANY, "sport", "  match sport %u",
                                   ntohl(key->val) & 0xffff);
-                       return;
+                       break;
                case 0xffff0000:
                        print_uint(PRINT_ANY, "dport", "match dport %u",
                                   ntohl(key->val) >> 16);
-                       return;
+                       break;
                case 0xffffffff:
                        print_nl();
                        print_uint(PRINT_ANY, "sport", "  match sport %u, ",
@@ -964,7 +960,7 @@ static void print_ipv6(FILE *f, const struct tc_u32_key *key)
                        print_uint(PRINT_ANY, "dport", "match dport %u",
                                   ntohl(key->val) >> 16);
 
-                       return;
+                       break;
                }
                /* XXX: Default print_raw */
        }