netdev - Re: Kernel warnings from tcp.c

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Message-ID: <20180829123540.09c167b6@xeon-e3>
Date:   Wed, 29 Aug 2018 12:35:40 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Adam Mitchell <adamhmitchell@...il.com>
Cc:     netdev@...r.kernel.org
Subject: Re: Kernel warnings from tcp.c

On Wed, 29 Aug 2018 14:38:38 -0400
Adam Mitchell <adamhmitchell@...il.com> wrote:

> Anyone with experience in tcp.c have an idea what's causing this on
> our busy database server?  Comes from this macro at line 2278:
>      WARN_ON(sock_owned_by_user(sk));
> 
> 
> [726780.788201] WARNING: CPU: 15 PID: 52245 at net/ipv4/tcp.c:2278
> tcp_close+0x40f/0x430
> 
> [726780.794947] Modules linked in: binfmt_misc nf_conntrack_netlink
> nfnetlink_queue tcp_diag inet_diag isofs ip6table_mangle ip6table_raw
> ip6table_nat nf_nat_ipv6 iptable_security xt_CT iptable_raw
> iptable_nat nf_nat_ipv4 nf_nat iptable_mangle xt_pkttype xt_NFLOG
> nfnetlink_log xt_u32 xt_multiport xt_set xt_conntrack
> ip_set_hash_netport ip_set_hash_ipport ip_set_hash_net ip_set_hash_ip
> ip_set nfnetlink nf_conntrack_proto_gre nf_conntrack_ipv6
> nf_defrag_ipv6 ip6table_filter ip6_tables xt_LOG nf_conntrack_tftp
> nf_conntrack_ftp nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack
> iptable_filter zfs(PO) zunicode(PO) zavl(PO) icp(PO) sb_edac
> intel_powerclamp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel
> pcbc aesni_intel crypto_simd glue_helper cryptd cirrus snd_seq
> zcommon(PO) ttm intel_rapl_perf snd_seq_device
> [726780.848696]  drm_kms_helper znvpair(PO) snd_pcm snd_timer spl(O)
> drm snd soundcore syscopyarea sysfillrect pcspkr sysimgblt input_leds
> fb_sys_fops i2c_piix4 ip_tables xfs libcrc32c ata_generic pata_acpi
> ata_piix xen_blkfront crc32c_intel libata ena(O) serio_raw floppy
> sunrpc
> [726780.863916] CPU: 15 PID: 52245 Comm: mysqld Tainted: P        W  O
>     4.16.13-1.el7.elrepo.x86_64 #1
>

Sorry, you have a tainted kernel with modules that are not upstream
therefore don't expect any support from kernel community