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zebra: Fix prefix2str buf and some invalid data output in zebra_mpls.c

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There are several places where prefix2str was used to convert
a prefix but they were debug guarded and the buffer was
used for flog_err/warn.  This would lead to corrupt data
being output in the failure cases if debugs were not turned
on.

Modify the code in zebra_mpls.c to not use prefix2str

Signed-off-by: Donald Sharp <sharpd@nvidia.com>
This commit is contained in:
Donald Sharp 2020-10-26 09:29:52 -04:00
parent 2919eea86a
commit b467b4b462
1 changed files with 12 additions and 31 deletions
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43
zebra/zebra_mpls.c
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@ -331,7 +331,6 @@ static void fec_evaluate(struct zebra_vrf *zvrf)
zebra_fec_t *fec;
uint32_t old_label, new_label;
int af;
char buf[BUFSIZ];
for (af = AFI_IP; af < AFI_MAX; af++) {
if (zvrf->fec_table[af] == NULL)
@ -348,9 +347,6 @@ static void fec_evaluate(struct zebra_vrf *zvrf)
|| fec->label_index == MPLS_INVALID_LABEL_INDEX)
continue;
if (IS_ZEBRA_DEBUG_MPLS)
prefix2str(&rn->p, buf, BUFSIZ);
/* Save old label, determine new label. */
old_label = fec->label;
new_label =
@ -364,8 +360,8 @@ static void fec_evaluate(struct zebra_vrf *zvrf)
if (IS_ZEBRA_DEBUG_MPLS)
zlog_debug(
"Update fec %s new label %u upon label block",
buf, new_label);
"Update fec %pRN new label %u upon label block",
rn, new_label);
fec->label = new_label;
fec_update_clients(fec);
@ -494,8 +490,7 @@ static void fec_print(zebra_fec_t *fec, struct vty *vty)
char buf[BUFSIZ];
rn = fec->rn;
prefix2str(&rn->p, buf, BUFSIZ);
vty_out(vty, "%s\n", buf);
vty_out(vty, "%pRN\n", rn);
vty_out(vty, " Label: %s", label2str(fec->label, buf, BUFSIZ));
if (fec->label_index != MPLS_INVALID_LABEL_INDEX)
vty_out(vty, ", Label Index: %u", fec->label_index);
@ -2244,7 +2239,6 @@ int zebra_mpls_fec_register(struct zebra_vrf *zvrf, struct prefix *p,
{
struct route_table *table;
zebra_fec_t *fec;
char buf[BUFSIZ];
bool new_client;
bool label_change = false;
uint32_t old_label;
@ -2255,14 +2249,11 @@ int zebra_mpls_fec_register(struct zebra_vrf *zvrf, struct prefix *p,
if (!table)
return -1;
if (IS_ZEBRA_DEBUG_MPLS)
prefix2str(p, buf, BUFSIZ);
if (label != MPLS_INVALID_LABEL && have_label_index) {
flog_err(
EC_ZEBRA_FEC_LABEL_INDEX_LABEL_CONFLICT,
"Rejecting FEC register for %s with both label %u and Label Index %u specified, client %s",
buf, label, label_index,
"Rejecting FEC register for %pFX with both label %u and Label Index %u specified, client %s",
p, label, label_index,
zebra_route_string(client->proto));
return -1;
}
@ -2274,8 +2265,8 @@ int zebra_mpls_fec_register(struct zebra_vrf *zvrf, struct prefix *p,
if (!fec) {
flog_err(
EC_ZEBRA_FEC_ADD_FAILED,
"Failed to add FEC %s upon register, client %s",
buf, zebra_route_string(client->proto));
"Failed to add FEC %pFX upon register, client %s",
p, zebra_route_string(client->proto));
return -1;
}
@ -2301,7 +2292,7 @@ int zebra_mpls_fec_register(struct zebra_vrf *zvrf, struct prefix *p,
listnode_add(fec->client_list, client);
if (IS_ZEBRA_DEBUG_MPLS)
zlog_debug("FEC %s label%s %u %s by client %s%s", buf,
zlog_debug("FEC %pFX label%s %u %s by client %s%s", p,
have_label_index ? " index" : "",
have_label_index ? label_index : label,
new_client ? "registered" : "updated",
@ -2352,15 +2343,11 @@ int zebra_mpls_fec_unregister(struct zebra_vrf *zvrf, struct prefix *p,
{
struct route_table *table;
zebra_fec_t *fec;
char buf[BUFSIZ];
table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))];
if (!table)
return -1;
if (IS_ZEBRA_DEBUG_MPLS)
prefix2str(p, buf, BUFSIZ);
fec = fec_find(table, p);
if (!fec) {
flog_err(EC_ZEBRA_FEC_RM_FAILED,
@ -2372,7 +2359,7 @@ int zebra_mpls_fec_unregister(struct zebra_vrf *zvrf, struct prefix *p,
listnode_delete(fec->client_list, client);
if (IS_ZEBRA_DEBUG_MPLS)
zlog_debug("FEC %s unregistered by client %s", buf,
zlog_debug("FEC %pFX unregistered by client %s", p,
zebra_route_string(client->proto));
/* If not a configured entry, delete the FEC if no other clients. Before
@ -2513,7 +2500,6 @@ int zebra_mpls_static_fec_add(struct zebra_vrf *zvrf, struct prefix *p,
{
struct route_table *table;
zebra_fec_t *fec;
char buf[BUFSIZ];
mpls_label_t old_label;
int ret = 0;
@ -2521,9 +2507,6 @@ int zebra_mpls_static_fec_add(struct zebra_vrf *zvrf, struct prefix *p,
if (!table)
return -1;
if (IS_ZEBRA_DEBUG_MPLS)
prefix2str(p, buf, BUFSIZ);
/* Update existing FEC or create a new one. */
fec = fec_find(table, p);
if (!fec) {
@ -2536,7 +2519,7 @@ int zebra_mpls_static_fec_add(struct zebra_vrf *zvrf, struct prefix *p,
}
if (IS_ZEBRA_DEBUG_MPLS)
zlog_debug("Add fec %s label %u", buf, in_label);
zlog_debug("Add fec %pFX label %u", p, in_label);
} else {
fec->flags |= FEC_FLAG_CONFIGURED;
if (fec->label == in_label)
@ -2546,7 +2529,7 @@ int zebra_mpls_static_fec_add(struct zebra_vrf *zvrf, struct prefix *p,
/* Label change, update clients. */
old_label = fec->label;
if (IS_ZEBRA_DEBUG_MPLS)
zlog_debug("Update fec %s new label %u", buf, in_label);
zlog_debug("Update fec %pFX new label %u", p, in_label);
fec->label = in_label;
fec_update_clients(fec);
@ -2569,7 +2552,6 @@ int zebra_mpls_static_fec_del(struct zebra_vrf *zvrf, struct prefix *p)
struct route_table *table;
zebra_fec_t *fec;
mpls_label_t old_label;
char buf[BUFSIZ];
table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))];
if (!table)
@ -2577,9 +2559,8 @@ int zebra_mpls_static_fec_del(struct zebra_vrf *zvrf, struct prefix *p)
fec = fec_find(table, p);
if (!fec) {
prefix2str(p, buf, BUFSIZ);
flog_err(EC_ZEBRA_FEC_RM_FAILED,
"Failed to find FEC %s upon delete", buf);
"Failed to find FEC %pFX upon delete", p);
return -1;
}