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Commitfcb41decf6("config: enable some useful features on !SMALL_FLASH devices") enabled netns, which in turn lead to the crash in the flow offload target. When the flow offloading framework intends to delete a flow from the hardware table, it is necessary to retrieve the namespace from nf_flowtable->ft_net. However, no one ever wrote the namespace into nf_flowtable->ft_net in advance. So the framework will mistakenly use a NULL namespace to execute dev_get_by_index_rcu(net, ifindex), leading to the kernel panic. Ref: FS#2321 Fixes:fcb41decf6("config: enable some useful features on !SMALL_FLASH devices") Tested-by: Simon Tretter <simon@mediaarchitectu.re> Signed-off-by: HsiuWen Yen <y.hsiuwen@gmail.com> [merged patch into offload patch, fix for 4.19, SOB fix, commit subj/msg touches] Signed-off-by: Petr Štetiar <ynezz@true.cz>