[Intel-wired-lan] [PATCH net] ice: Fix NULL pointer access, if PF doesn't support SRIOV_LAG

[Przemek Kitszel]

On 8/26/24 12:17, Thomas Bogendoerfer wrote:
> On Mon, 26 Aug 2024 11:41:19 +0200
> Jiri Pirko <jiri at resnulli.us> wrote:
> 
>> Mon, Aug 26, 2024 at 10:58:30AM CEST, tbogendoerfer at suse.de wrote:
>>> For PFs, which don't support SRIOV_LAG, there is no pf->lag struct
>>> allocated. So before accessing pf->lag a NULL pointer check is needed.
>>>
>>> Signed-off-by: Thomas Bogendoerfer <tbogendoerfer at suse.de>
>>
>> You need to add a "fixes" tag blaming the commit that introduced the
>> bug.

Would be also good to CC the author.

> 
> of course...
> 
> Fixes: 1e0f9881ef79 ("ice: Flesh out implementation of support for SRIOV on
> bonded interface")

the bug was introduced later, the tag should be:
Fixes: ec5a6c5f79ed ("ice: process events created by lag netdev event 
handler")

The mentioned commit extracted code into ice_lag_move_new_vf_nodes(),
and there is just one call to this function by now, just after
releasing lag_mutex, so would be good to change the semantics of
ice_lag_move_new_vf_nodes() to "only for lag-enabled flows, with
lag_mutex held", and fix the call to it to reflect that.

> 
> Should I resend the patch ?

sometimes that is not strictly needed, but after two possible tags
mentioned that's the best way :)

> 
> Thomas.
>