Hi Xavier,

Thanks for v2!

On 12/3/25 3:54 PM, Xavier Simonart wrote:
> sb_port_group_lookup_by_name() can return NULL if the (stale) record
> it's searching for has been deleted in transactions that are processed
> in the current iteration.

Nit (but this can be addressed by whoever merges the patch): I'd add an
empty line here.

> This caused segfault such as:
> ovsdb_idl_row_is_synthetic (row=0x0) at lib/ovsdb-idl.c:2724
> ovsdb_idl_txn_delete (row_=0x0) at lib/ovsdb-idl.c:3834
> port_group_nb_port_group_handler (node=<optimized out>, data_=<optimized 
> out>) at northd/en-port-group.c:616
> ...
> 
> Signed-off-by: Xavier Simonart <[email protected]>
> Fixes: a1d82e9fa11e ("northd: Process port_group changes incrementally.")

Nit (but this can be addressed by whoever merges the patch): the
Signed-off-by should be the last line in the commit log.

> 
> ---
> -v2: based on Dumitru's feedback:
>      - Updated commit message.
>      - Update test case.
> ---
>  northd/en-port-group.c |  2 ++
>  tests/ovn-northd.at    | 27 +++++++++++++++++++++++++++
>  2 files changed, 29 insertions(+)
> 
> diff --git a/northd/en-port-group.c b/northd/en-port-group.c
> index 476c0a18d..d0b7961fb 100644
> --- a/northd/en-port-group.c
> +++ b/northd/en-port-group.c
> @@ -613,7 +613,9 @@ port_group_nb_port_group_handler(struct engine_node 
> *node, void *data_)
>          const struct sbrec_port_group *sb_pg =
>              sb_port_group_lookup_by_name(sbrec_port_group_by_name,
>                                           stale_sb_port_group_name);
> +        if (sb_pg) {
>              sbrec_port_group_delete(sb_pg);
> +        }
>      }
>  
>      sset_destroy(&stale_sb_port_groups);
> diff --git a/tests/ovn-northd.at b/tests/ovn-northd.at
> index 931064fe6..168e34f7e 100644
> --- a/tests/ovn-northd.at
> +++ b/tests/ovn-northd.at
> @@ -18914,3 +18914,30 @@ wait_row_count Igmp_Group 0 address=mrouters
>  OVN_CLEANUP_NORTHD
>  AT_CLEANUP
>  ])
> +
> +OVN_FOR_EACH_NORTHD_NO_HV([
> +AT_SETUP([port group segfault])
> +
> +ovn_start
> +
> +check ovn-nbctl ls-add sw0
> +check ovn-nbctl lsp-add sw0 sw0-port1 \
> +             -- lsp-set-addresses sw0-port1 "50:54:00:00:00:01 192.168.0.2"
> +
> +check ovn-nbctl pg-add pg1
> +check ovn-nbctl --wait=sb pg-set-ports pg1 sw0-port1
> +
> +sleep_sb
> +sleep_northd
> +check ovn-nbctl pg-del pg1
> +check ovn-nbctl pg-add pg1
> +check ovn-nbctl pg-set-ports pg1 sw0-port1
> +
> +wake_up_sb
> +wake_up_northd
> +check ovn-nbctl pg-del pg1
> +check ovn-nbctl --wait=sb sync
> +
> +OVN_CLEANUP_NORTHD
> +AT_CLEANUP
> +])

The change looks good to me, thanks!

Acked-by: Dumitru Ceara <[email protected]>

Regards,
Dumitru


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