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network: Use local variables in networkUpdatePortBandwidth

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We go through the trouble of checking {old|new}Bandwidth[->in] and
storing the result in local @old_floor and @new_floor, but then
we don't use them. Instead we make derefs to the longer name. This
caused Coverity to note dereferencing newBandwidth->in without first
checking @newBandwidth like was done for new_floor could cause a
NULL dereference.

Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This commit is contained in:
John Ferlan 2019-11-12 16:15:04 -05:00
parent d70024d0a6
commit 10881fac46
1 changed files with 8 additions and 9 deletions
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17
src/network/bridge_driver.c
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@ -5380,19 +5380,18 @@ networkUpdatePortBandwidth(virNetworkObjPtr obj,
/* Okay, there are three possible scenarios: */
if (oldBandwidth && oldBandwidth->in && oldBandwidth->in->floor &&
newBandwidth->in && newBandwidth->in->floor) {
if (old_floor > 0 && new_floor > 0) {
/* Either we just need to update @floor .. */
if (virNetDevBandwidthUpdateRate(def->bridge,
*class_id,
def->bandwidth,
newBandwidth->in->floor) < 0)
new_floor) < 0)
return -1;
tmp_floor_sum = virNetworkObjGetFloorSum(obj);
tmp_floor_sum -= oldBandwidth->in->floor;
tmp_floor_sum += newBandwidth->in->floor;
tmp_floor_sum -= old_floor;
tmp_floor_sum += new_floor;
virNetworkObjSetFloorSum(obj, tmp_floor_sum);
new_rate -= tmp_floor_sum;
@ -5401,17 +5400,17 @@ networkUpdatePortBandwidth(virNetworkObjPtr obj,
virNetworkObjSaveStatus(driver->stateDir,
obj, network_driver->xmlopt) < 0) {
/* Ouch, rollback */
tmp_floor_sum -= newBandwidth->in->floor;
tmp_floor_sum += oldBandwidth->in->floor;
tmp_floor_sum -= new_floor;
tmp_floor_sum += old_floor;
virNetworkObjSetFloorSum(obj, tmp_floor_sum);
ignore_value(virNetDevBandwidthUpdateRate(def->bridge,
*class_id,
def->bandwidth,
oldBandwidth->in->floor));
old_floor));
return -1;
}
} else if (newBandwidth->in && newBandwidth->in->floor) {
} else if (new_floor > 0) {
/* .. or we need to plug in new .. */
if (networkPlugBandwidthImpl(obj, mac, newBandwidth,