On Thu, Aug 18, 2022 at 10:20 PM Ales Musil wrote:
>
>
>
> On Fri, Aug 19, 2022 at 4:08 AM Han Zhou wrote:
>>
>> Fix the problem introduced by commit e52c245136, reported by ASAN for
test case:
>> "options:activation-strategy for logical port"
>>
>> ==1480622==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x6110c7d0 at pc 0x004fbd91 bp 0x7ffec4244630 sp 0x7ffec4243de0
>> READ of size 168 at 0x6110c7d0 thread T0
>> #0 0x4fbd90 in __interceptor_memcpy.part.0
(/home/hanzhou/src/ovn/_build_as/controller/ovn-controller+0x4fbd90)
>> #1 0x73457f in ofpbuf_put
/home/hanzhou/src/ovs/_build/../lib/ofpbuf.c:431:5
>> #2 0x73457f in ofpbuf_put
/home/hanzhou/src/ovs/_build/../lib/ofpbuf.c:424:1
>> #3 0x72ba29 in ofpprop_put
/home/hanzhou/src/ovs/_build/../lib/ofp-prop.c:294:5
>> #4 0x7046e7 in encode_CONTROLLER
/home/hanzhou/src/ovs/_build/../lib/ofp-actions.c:914:13
>> #5 0x7046e7 in encode_ofpact
/home/hanzhou/src/ovs/_build/../lib/ofp-actions.c:8890:9
>> #6 0x705878 in ofpacts_put_openflow_instructions
/home/hanzhou/src/ovs/_build/../lib/ofp-actions.c:8943:17
>> #7 0x716287 in ofputil_encode_flow_mod
/home/hanzhou/src/ovs/_build/../lib/ofp-flow.c:426:9
>> #8 0x5c5978 in encode_flow_mod
/home/hanzhou/src/ovn/_build_as/../controller/ofctrl.c:1893:12
>> #9 0x5c5978 in add_flow_mod
/home/hanzhou/src/ovn/_build_as/../controller/ofctrl.c:1912:26
>> #10 0x5c5978 in installed_flow_add
/home/hanzhou/src/ovn/_build_as/../controller/ofctrl.c:2254:5
>> #11 0x5bfd62 in update_installed_flows_by_track
/home/hanzhou/src/ovn/_build_as/../controller/ofctrl.c:2484:17
>> #12 0x5bc5b9 in ofctrl_put
/home/hanzhou/src/ovn/_build_as/../controller/ofctrl.c:2715:13
>> #13 0x600e97 in main
/home/hanzhou/src/ovn/_build_as/../controller/ovn-controller.c:4186:25
>> #14 0x7f7ae80ce1a1 in __libc_start_main (/lib64/libc.so.6+0x281a1)
>> #15 0x49432d in _start
(/home/hanzhou/src/ovn/_build_as/controller/ovn-controller+0x49432d)
>>
>> Fixes: e52c245136 ("physical.c: Fix bug of wrong use in vm migration")
>> Signed-off-by: Han Zhou
>> ---
>> controller/physical.c | 3 ++-
>> 1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/controller/physical.c b/controller/physical.c
>> index 552837bcd..c14a752f0 100644
>> --- a/controller/physical.c
>> +++ b/controller/physical.c
>> @@ -1001,6 +1001,7 @@ setup_rarp_activation_strategy(const struct
sbrec_port_binding *binding,
>>
>> load_logical_ingress_metadata(binding, zone_ids, );
>>
>> +size_t ofs = ofpacts.size;
>> struct ofpact_controller *oc = ofpact_put_CONTROLLER();
>> oc->max_len = UINT16_MAX;
>> oc->reason = OFPR_ACTION;
>> @@ -1011,7 +1012,7 @@ setup_rarp_activation_strategy(const struct
sbrec_port_binding *binding,
>> ofpbuf_put(, , sizeof ah);
>>
>> ofpacts.header = oc;
>> -oc->userdata_len = ofpacts.size - (sizeof *oc);
>> +oc->userdata_len = ofpacts.size - (ofs + sizeof *oc);
>> ofpact_finish_CONTROLLER(, );
>> put_resubmit(OFTABLE_LOG_INGRESS_PIPELINE, );
>>
>> --
>> 2.30.2
>>
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>>
>
> Hi Han,
>
> the fix is actually a bit more complex as Dumitru mentioned on the first
patch [0].
> The result of the conversation is v2 [1].
Sorry that I didn't notice your patch, and I thought it was just a simple
regression without carefully looking at the original problem. I am replying
to your patch.
Thanks,
Han
>
> Thanks,
> Ales
>
> [0] https://mail.openvswitch.org/pipermail/ovs-dev/2022-August/397165.html
> [1]
https://patchwork.ozlabs.org/project/ovn/patch/20220818094110.160733-1-amu...@redhat.com/
>
>
> --
>
> Ales Musil
>
> Senior Software Engineer - OVN Core
>
> Red Hat EMEA
>
> amu...@redhat.comIM: amusil
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