Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: v: stop OGMv2 on disabled interface When a batadv_hard_iface is disabled, its mesh_iface pointer is set to NULL. However, batadv_v_ogm_send_meshif() may still dispatch OGMs via batadv_v_ogm_queue_on_if() for interfaces that have since lost their mesh_iface association. This results in a NULL pointer dereference when batadv_v_ogm_queue_on_if() unconditionally calls netdev_priv() on the now NULL hard_iface->mesh_iface to retrieve the batadv_priv. It is necessary to ensure that the batadv_v_ogm_queue_on_if() checks that it is using the same mesh_iface for which batadv_v_ogm_send_meshif() was called.

References 8

• git.kernel.org https://git.kernel.org/stable/c/040fe8eb34624002071dd21de9824dfe668ce65d
• git.kernel.org https://git.kernel.org/stable/c/1be1e99cbd5b74a69d3f92200ca87cf1bce852db
• git.kernel.org https://git.kernel.org/stable/c/31dcb9711abd1dcd2080d9fac05c79dd9997d6bf
• git.kernel.org https://git.kernel.org/stable/c/4ff461af943efb5e74d09942d5ffee7644d1e1fe
• git.kernel.org https://git.kernel.org/stable/c/70c9f6ab0d8f785087fb74fb85464a9a5288bfdb
• git.kernel.org https://git.kernel.org/stable/c/aad70db50ea3d7dfe30e402b889ff075a293b287
• git.kernel.org https://git.kernel.org/stable/c/d7391a2b854a62235539c68e9cbf6fc7910a8e9a
• git.kernel.org https://git.kernel.org/stable/c/f8ce8b8331a1bc44ad4905886a482214d428b253

Remediation