netdev - Re: Urgent Bug Report Kernel crash 6.5.2

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Date: Mon, 18 Sep 2023 10:09:40 +0200
From: Eric Dumazet <edumazet@...gle.com>
To: Martin Zaharinov <micron10@...il.com>
Cc: Paolo Abeni <pabeni@...hat.com>, netdev <netdev@...r.kernel.org>, 
	patchwork-bot+netdevbpf@...nel.org, Jakub Kicinski <kuba@...nel.org>, 
	Stephen Hemminger <stephen@...workplumber.org>, kuba+netdrv@...nel.org, dsahern@...il.com, 
	Florian Westphal <fw@...len.de>, Pablo Neira Ayuso <pablo@...filter.org>
Subject: Re: Urgent Bug Report Kernel crash 6.5.2

On Sun, Sep 17, 2023 at 1:55 PM Martin Zaharinov <micron10@...il.com> wrote:
>
> Hi Eric
> is it possible bug to come from this patch : https://patchwork.kernel.org/project/netdevbpf/cover/20230911170531.828100-1-edumazet@google.com/
>
>

Everything is possible, but this is not in 6.5 kernels.

I would suggest you start a bisection.

> m.
>
> > On 17 Sep 2023, at 14:40, Martin Zaharinov <micron10@...il.com> wrote:
> >
> > One more in changelog for kernel 6.5 : https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5
> >
> > I see have many bug reports with :
> >
> > Sep 17 11:43:11  [127675.395289][    C2]  ? process_backlog+0x10c/0x230
> > Sep 17 11:43:11  [127675.395386][    C2]  ? __napi_poll+0x20/0x180
> > Sep 17 11:43:11  [127675.395478][    C2]  ? net_rx_action+0x2a4/0x390
> >
> >
> > In all server have simple nftables rulls , ethernet card is intel xl710 or 82599. its a very simple config.
> >
> > m.
> >
> >
> >
> >
> >> On 16 Sep 2023, at 12:04, Martin Zaharinov <micron10@...il.com> wrote:
> >>
> >> Hi Paolo
> >>
> >> in first report machine dont have out of tree module
> >>
> >> this bug is come after move from kernel 6.2 to 6.3
> >>
> >> m.
> >>
> >> On Sat, Sep 16, 2023, 11:27 Paolo Abeni <pabeni@...hat.com> wrote:
> >> On Sat, 2023-09-16 at 02:11 +0300, Martin Zaharinov wrote:
> >>> one more log:
> >>>
> >>> Sep 12 07:37:29  [151563.298466][    C5] ------------[ cut here ]------------
> >>> Sep 12 07:37:29  [151563.298550][    C5] rcuref - imbalanced put()
> >>> Sep 12 07:37:29  [151563.298564][ C5] WARNING: CPU: 5 PID: 0 at lib/rcuref.c:267 rcuref_put_slowpath (lib/rcuref.c:267 (discriminator 1))
> >>> Sep 12 07:37:29  [151563.298724][    C5] Modules linked in: nft_limit nf_conntrack_netlink vlan_mon(O) pppoe pppox ppp_generic slhc nft_ct nft_nat nft_chain_nat nf_tables netconsole coretemp bonding i40e nf_nat_sip nf_conntrack_sip nf_nat_pptp nf_conntrack_pptp nf_nat_tftp nf_conntrack_tftp nf_nat_ftp nf_conntrack_ftp nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_xnatlog(O) ipmi_si ipmi_devintf ipmi_msghandler rtc_cmos [last unloaded: BNGBOOT(O)]
> >>> Sep 12 07:37:29  [151563.298894][    C5] CPU: 5 PID: 0 Comm: swapper/5 Tainted: G           O       6.5.2 #1
> >>
> >>
> >> You have out-of-tree modules taint in all the report you shared. Please
> >> try to reproduce the issue with such taint, thanks!
> >>
> >> Paolo
> >>
> >
>