Re: BUG: general protection fault in batadv_bla_del_backbone_claims

On Sunday, 25 August 2024 06:14:48 CEST Xingyu Li wrote:

In line 307 of net/batman-adv/bridge_loop_avoidance, when executing
"hash = backbone_gw->bat_priv->bla.claim_hash;", it does not check if
"backbone_gw->bat_priv==NULL".

Because it cannot be NULL unless something really, really, really bad 
happened. bat_priv will only be set when the gateway gets created using 
batadv_bla_get_backbone_gw(). It never gets unset during the lifetime on the 
backbone gateway.

Maybe Simon has more to say about that.

On Sunday, 25 August 2024 06:14:48 CEST Xingyu Li wrote:

RIP: 0010:batadv_bla_del_backbone_claims+0x4e/0x360

Which line would that be in your build?

On Sunday, 25 August 2024 06:14:48 CEST Xingyu Li wrote:

Syzkaller reproducer:

At the moment, I am unable to reproduce this crash with the provided 
reproducer.

Can you reproduce it with it? If you can, did you try to perform a bisect 
using the reproducer?

Kind regards,
	Sven