[ovs-dev] [PATCH] ofp-meter: Fix use-after-free for decoding meter mods.

[Ben Pfaff]

Found by libfuzzer-ngram.

Reported-by: Bhargava Shastry <bshastry at sect.tu-berlin.de>
Signed-off-by: Ben Pfaff <blp at ovn.org>
---
 lib/ofp-meter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ofp-meter.c b/lib/ofp-meter.c
index 204f035ec290..4f77f508d396 100644
--- a/lib/ofp-meter.c
+++ b/lib/ofp-meter.c
@@ -98,12 +98,12 @@ ofputil_decode_meter_mod(const struct ofp_header *oh,
             mm->meter.flags & OFPMF13_PKTPS) {
             return OFPERR_OFPMMFC_BAD_FLAGS;
         }
-        mm->meter.bands = bands->data;
 
         error = ofputil_pull_bands(&b, b.size, &mm->meter.n_bands, bands);
         if (error) {
             return error;
         }
+        mm->meter.bands = bands->data;
     }
     return 0;
 }
-- 
2.16.1