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nwfilter: Alter virNWFilterSnoopReqLeaseDel logic

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Move the fetch of @ipAddrLeft to after the goto skip_instantiate
and remove the (req->binding) guard since we know that as long
as req->binding is created, then req->threadkey is filled in.

Found by Coverity

Signed-off-by: John Ferlan <jferlan@redhat.com>
ACKed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
John Ferlan 2018-09-27 20:36:58 -04:00
parent f0982d5faa
commit 3a286a4e26
1 changed files with 4 additions and 5 deletions
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9
src/nwfilter/nwfilter_dhcpsnoop.c
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@ -846,7 +846,6 @@ virNWFilterSnoopReqLeaseDel(virNWFilterSnoopReqPtr req,
int ret = 0; int ret = 0;
virNWFilterSnoopIPLeasePtr ipl; virNWFilterSnoopIPLeasePtr ipl;
char *ipstr = NULL; char *ipstr = NULL;
int ipAddrLeft = 0;
/* protect req->start, req->ifname and the lease */ /* protect req->start, req->ifname and the lease */
virNWFilterSnoopReqLock(req); virNWFilterSnoopReqLock(req);
@ -867,13 +866,13 @@ virNWFilterSnoopReqLeaseDel(virNWFilterSnoopReqPtr req,
if (update_leasefile) if (update_leasefile)
virNWFilterSnoopLeaseFileSave(ipl); virNWFilterSnoopLeaseFileSave(ipl);
if (req->binding)
ipAddrLeft = virNWFilterIPAddrMapDelIPAddr(req->binding->portdevname, ipstr);
if (!req->threadkey || !instantiate) if (!req->threadkey || !instantiate)
goto skip_instantiate; goto skip_instantiate;
if (ipAddrLeft) { /* Assumes that req->binding is valid since req->threadkey
* is only generated after req->binding is filled in during
* virNWFilterDHCPSnoopReq processing */
if ((virNWFilterIPAddrMapDelIPAddr(req->binding->portdevname, ipstr)) > 0) {
ret = virNWFilterInstantiateFilterLate(req->driver, ret = virNWFilterInstantiateFilterLate(req->driver,
req->binding, req->binding,
req->ifindex); req->ifindex);