From: Craig Dillabaugh <[email protected]>
Date: Mon, 26 Mar 2018 14:58:32 -0400
> Fixes a bug in the tcf_dump_walker function that can cause some actions
> to not be reported when dumping a large number of actions. This issue
> became more aggrevated when cookies feature was added. In particular
> this issue is manifest when large cookie values are assigned to the
> actions and when enough actions are created that the resulting table
> must be dumped in multiple batches.
>
> The number of actions returned in each batch is limited by the total
> number of actions and the memory buffer size. With small cookies
> the numeric limit is reached before the buffer size limit, which avoids
> the code path triggering this bug. When large cookies are used buffer
> fills before the numeric limit, and the erroneous code path is hit.
>
> For example after creating 32 csum actions with the cookie
> aaaabbbbccccdddd
...
> Note that the action with index 27 is omitted from the report.
>
> Fixes: 4b3550ef530c ("[NET_SCHED]: Use nla_nest_start/nla_nest_end")"
> Signed-off-by: Craig Dillabaugh <[email protected]>
Applied and queued up for -stable.
