Denys Fedoryshchenko <nuclear...@nuclearcat.com> wrote:
> Hi,
>
> I am trying to upgrade kernel 4.11.8 to 4.12.3 (it is a nat/router, handling
> approx 2gbps of pppoe users traffic) and noticed that after while server
> rebooting(i have set reboot on panic and etc).
> I can't run serial console, and in pstore / netconsole there is nothing.
> Best i got is some very short message about softlockup in ipmi, but as
> storage very limited there - it is near useless.
>
> By preliminary testing (can't do it much, as it's production) - it seems
> following lines causing issue, they worked in 4.11.8 and no more in 4.12.3.
Wild guess here, does this help?
diff --git a/net/netfilter/nf_conntrack_helper.c
b/net/netfilter/nf_conntrack_helper.c
--- a/net/netfilter/nf_conntrack_helper.c
+++ b/net/netfilter/nf_conntrack_helper.c
@@ -266,6 +266,8 @@ int __nf_ct_try_assign_helper(struct nf_conn *ct, struct
nf_conn *tmpl,
help = nf_ct_helper_ext_add(ct, helper, flags);
if (help == NULL)
return -ENOMEM;
+ if (!nf_ct_ext_add(ct, NF_CT_EXT_NAT, flags));
+ return -ENOMEM;
} else {
/* We only allow helper re-assignment of the same sort since
* we cannot reallocate the helper extension area.
