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| author | Tom Gundersen <teg@jklm.no> | 2014-09-13 20:41:35 +0200 |
|---|---|---|
| committer | Tom Gundersen <teg@jklm.no> | 2014-09-13 21:10:59 +0200 |
| commit | d1c457badfce0dc86b54b2cac2c5eec99d7bc65e (patch) | |
| tree | 4db548d82fee40439096a3e892f32317d8275322 /src/resolve | |
| parent | 124f09e8125e1eae5b058b1f287e72c85a46d557 (diff) | |
resolved: fall back to hardcoded ifindex when checking if a link is the loopback
Reported by Philippe De Swert <philippedeswert@gmail.com>.
Coverity CID#1237656
Diffstat (limited to 'src/resolve')
| -rw-r--r-- | src/resolve/resolved-manager.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/resolve/resolved-manager.c b/src/resolve/resolved-manager.c index f97989754d..00aaffe448 100644 --- a/src/resolve/resolved-manager.c +++ b/src/resolve/resolved-manager.c @@ -1687,6 +1687,9 @@ fail: return r; } +/* lo having ifindex 1 is hardcoded in the kernel */ +#define LOOPBACK_IFINDEX 1 + int manager_ifindex_is_loopback(Manager *m, int ifindex) { Link *l; assert(m); @@ -1695,7 +1698,10 @@ int manager_ifindex_is_loopback(Manager *m, int ifindex) { return -EINVAL; l = hashmap_get(m->links, INT_TO_PTR(ifindex)); - if (l->flags & IFF_LOOPBACK) + if (!l) + /* in case we don't yet track the link, rely on the hardcoded value */ + return ifindex == LOOPBACK_IFINDEX; + else if (l->flags & IFF_LOOPBACK) return 1; return 0; |