infiniband: avoid dereferencing uninitialized dst on error path
With commit eea40b8f624f ("infiniband: call ipv6 route lookup
via the stub interface"), if the route lookup fails due to
ipv6 being disabled, the dst variable is left untouched, and
the following dst_release() may access uninitialized memory.
Since ipv6_dst_lookup() always sets dst to NULL in case of
lookup failure with ipv6 enabled, fix the above just
returning the error code if the lookup fails.
Fixes: eea40b8f624 ("infiniband: call ipv6 route lookup via the stub interface")
Reported-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
index 523d243..02971e2 100644
--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -446,7 +446,7 @@
ret = ipv6_stub->ipv6_dst_lookup(addr->net, NULL, &dst, &fl6);
if (ret < 0)
- goto put;
+ return ret;
rt = (struct rt6_info *)dst;
if (ipv6_addr_any(&fl6.saddr)) {