I'm running OVS 2.7.0 on a Linux 3.10.0 kernel. I found a ovs crash. I doubt it's caused by use-after-free set match->flow = NULL in minimatch_destroy function with following stack:
(gdb) bt #0 0x00007ff273b71197 in raise () from /usr/lib64/libc.so.6 #1 0x00007ff273b72888 in abort () from /usr/lib64/libc.so.6 #2 0x0000000000787289 in PAT_abort () #3 0x00000000007843cd in patchIllInsHandler () #4 <signal handler called> #5 0x00000000004cbfae in miniflow_n_values (flow=0x0) at lib/flow.h:540 #6 0x00000000004cc95f in minimask_hash (mask=0x0, basis=0) at lib/classifier-private.h:321 #7 0x00000000004cf613 in find_subtable (cls=0x38ad6e8, mask=0x0) at lib/classifier.c:1406 #8 0x00000000004cefa7 in classifier_find_rule_exactly (cls=0x38ad6e8, target=0x7ff118025500, version=18446744073709551615) at lib/classifier.c:1178 #9 0x000000000047bcaf in collect_rules_strict (ofproto=0x389bc30, criteria=0x7ff1180254f8, rules=0x7ff118025588) at ofproto/ofproto.c:4253 #10 0x000000000047eba3 in modify_flow_start_strict (ofproto=0x389bc30, ofm=0x7ff1180254f0) at ofproto/ofproto.c:5492 #11 0x0000000000482c9f in ofproto_flow_mod_start (ofproto=0x389bc30, ofm=0x7ff1180254f0) at ofproto/ofproto.c:7506 #12 0x000000000047dc01 in ofproto_flow_mod_learn_start (ofm=0x7ff1180254f0) at ofproto/ofproto.c:5088 #13 0x000000000047dd4b in ofproto_flow_mod_learn (ofm=0x7ff1180254f0, keep_ref=true) at ofproto/ofproto.c:5140 #14 0x00000000004b55d4 in xlate_push_stats_entry (entry=0x7ff118015148, stats=0x7ff11d6675f0) at ofproto/ofproto-dpif-xlate-cache.c:130 #15 0x00000000004b57b6 in xlate_push_stats (xcache=0x7ff1180254a0, stats=0x7ff11d6675f0) at ofproto/ofproto-dpif-xlate-cache.c:183 #16 0x00000000004a312f in revalidate_ukey (udpif=0x38a5260, ukey=0x7ff0fc015910, stats=0x7ff11d668260, odp_actions=0x7ff11d66a3d0, reval_seq=25145760, recircs=0x7ff11d66a3b0) at ofproto/ofproto-dpif-upcall.c:2134 #17 0x00000000004a3d76 in revalidate (revalidator=0x4cdda08) at ofproto/ofproto-dpif-upcall.c:2428 #18 0x00000000004a0528 in udpif_revalidator (arg=0x4cdda08) at ofproto/ofproto-dpif-upcall.c:954 #19 0x000000000058f811 in ovsthread_wrapper (aux_=0x55088a0) at lib/ovs-thread.c:682 #20 0x00007ff27549adc5 in start_thread () from /usr/lib64/libpthread.so.0 Any idea about this? Thanks, Yunjian
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