ipv4: Fix crashes in fib_rules_tclass().
All paths assume, when CONFIG_IP_MULTIPLE_TABLES is enabled, that any
successful call to fib_lookup() will initialize the fib_result->r
value to something.
We violated that expectation in the new fib_lookup() fast path.
Reported-by: Or Gerlitz <ogerlitz@mellanox.com>
Tested-by: Eric Dumazet <eric.dumazet@gmail.com>
Tested-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 539c672..000c467 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -230,6 +230,7 @@
struct fib_result *res)
{
if (!net->ipv4.fib_has_custom_rules) {
+ res->r = NULL;
if (net->ipv4.fib_local &&
!fib_table_lookup(net->ipv4.fib_local, flp, res,
FIB_LOOKUP_NOREF))