[Devel] [PATCH RH7] netfilter: drop/reaquire nfnl_lock on request_module() in nft_log module

[Andrey Ryabinin]

On 7/16/20 8:21 PM, Konstantin Khorenko wrote:

> If nc->call_batch() == nf_tables_newrule(), it means
> nc == nf_tables_cb[NFT_MSG_NEWRULE]
> 
> nc == &ss->cb[cb_id]
> => ss == nf_tables_subsys
> 
> and we know that nf_tables_subsys.subsys_id = NFNL_SUBSYS_NFTABLES
> 
> 
> static const struct nfnetlink_subsystem nf_tables_subsys = {
>         .name           = "nf_tables",
>         .subsys_id      = NFNL_SUBSYS_NFTABLES,
>         .cb             = nf_tables_cb,
> ...
> 
> 
> Proven?
> 

Seems ok.
FTR I was thinking about 'request_module_nowait(); return -EAGAIN;' as an alternative.