Dear Debian Kernel Team, on my Sophos UTM 425 I've experienced a network crash, machine was still working and could be rebooted from the console. Due to the lack of more info and the fact that it happened only once I will not open a bug report unless you instruct me to do so. In the hope it could be somehow useful.
Best regards, Tito System Events =-=-=-=-=-=-= Jun 23 23:59:37 cerberus kernel: [1383075.334182] ------------[ cut here ]------------ Jun 23 23:59:37 cerberus kernel: [1383075.334192] WARNING: CPU: 0 PID: 0 at /build/linux-6WgLIg/linux-4.9.88/net/sched/sch_generic.c:316 dev_watchdog+0x233/0x240 Jun 23 23:59:37 cerberus kernel: [1383075.334193] NETDEV WATCHDOG: eth0 (igb): transmit queue 2 timed out Jun 23 23:59:37 cerberus kernel: [1383075.334193] Modules linked in: xt_REDIRECT nf_nat_redirect xt_nat tun xt_geoip(O) xt_NFQUEUE nf_log_ipv4 nf_log_common xt_tcpudp ip6table_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 nf_nat_ftp iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat xt_TCPMSS xt_LOG ipt_REJECT nf_reject_ipv4 iptable_mangle xt_multiport xt_state xt_limit xt_conntrack nf_conntrack_ftp nf_conntrack ip6table_filter ip6_tables iptable_filter ip_tables x_tables bridge stp llc sch_fq_codel nfnetlink_queue nfnetlink nct6775 hwmon_vid intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm arc4 rt2800usb rt2x00usb rt2800lib rt2x00lib irqbypass crct10dif_pclmul mac80211 iTCO_wdt crc32_pclmul ghash_clmulni_intel ppdev iTCO_vendor_support cfg80211 intel_cstate intel_uncore crc_ccitt rfkill intel_rapl_perf Jun 23 23:59:37 cerberus kernel: [1383075.334223] joydev evdev i915 video drm_kms_helper drm sg pcspkr serio_raw parport_pc lpc_ich shpchp parport mfd_core button ext4 crc16 jbd2 fscrypto ecb mbcache raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c crc32c_generic raid0 multipath linear hid_generic usbhid hid raid1 md_mod sd_mod crc32c_intel ahci libahci aesni_intel libata aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd i2c_i801 scsi_mod i2c_smbus psmouse ehci_pci ehci_hcd usbcore igb usb_common i2c_algo_bit dca ptp pps_core Jun 23 23:59:37 cerberus kernel: [1383075.334252] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G O 4.9.0-6-amd64 #1 Debian 4.9.88-1+deb9u1 Jun 23 23:59:37 cerberus kernel: [1383075.334253] Hardware name: Sophos UTM/To be filled by O.E.M., BIOS 4.6.4 11/08/2011 Jun 23 23:59:37 cerberus kernel: [1383075.334254] 0000000000000000 ffffffff96b2f774 ffff9231c0203e20 0000000000000000 Jun 23 23:59:37 cerberus kernel: [1383075.334256] ffffffff96878a5e 0000000000000002 ffff9231c0203e78 ffff9231a8e7c000 Jun 23 23:59:37 cerberus kernel: [1383075.334258] 0000000000000000 ffff9231ada84940 0000000000000008 ffffffff96878adf Jun 23 23:59:37 cerberus kernel: [1383075.334260] Call Trace: Jun 23 23:59:37 cerberus kernel: [1383075.334261] <IRQ> Jun 23 23:59:37 cerberus kernel: [1383075.334264] [<ffffffff96b2f774>] ? dump_stack+0x5c/0x78 Jun 23 23:59:37 cerberus kernel: [1383075.334267] [<ffffffff96878a5e>] ? __warn+0xbe/0xe0 Jun 23 23:59:37 cerberus kernel: [1383075.334269] [<ffffffff96878adf>] ? warn_slowpath_fmt+0x5f/0x80 Jun 23 23:59:37 cerberus kernel: [1383075.334271] [<ffffffff96d356c3>] ? dev_watchdog+0x233/0x240 Jun 23 23:59:37 cerberus kernel: [1383075.334273] [<ffffffff96d35490>] ? dev_deactivate_queue.constprop.26+0x60/0x60 Jun 23 23:59:37 cerberus kernel: [1383075.334275] [<ffffffff968e65e2>] ? call_timer_fn+0x32/0x120 Jun 23 23:59:37 cerberus kernel: [1383075.334277] [<ffffffff968e6957>] ? run_timer_softirq+0x1d7/0x420 Jun 23 23:59:37 cerberus kernel: [1383075.334279] [<ffffffff968f7950>] ? tick_sched_do_timer+0x30/0x30 Jun 23 23:59:37 cerberus kernel: [1383075.334281] [<ffffffff968f7360>] ? tick_sched_handle.isra.12+0x20/0x50 Jun 23 23:59:37 cerberus kernel: [1383075.334282] [<ffffffff968f7988>] ? tick_sched_timer+0x38/0x70 Jun 23 23:59:37 cerberus kernel: [1383075.334284] [<ffffffff96e15eba>] ? __do_softirq+0x10a/0x29e Jun 23 23:59:37 cerberus kernel: [1383075.334286] [<ffffffff9687ebbe>] ? irq_exit+0xae/0xb0 Jun 23 23:59:37 cerberus kernel: [1383075.334287] [<ffffffff96e15984>] ? smp_apic_timer_interrupt+0x44/0x50 Jun 23 23:59:37 cerberus kernel: [1383075.334289] [<ffffffff96e14276>] ? apic_timer_interrupt+0x96/0xa0 Jun 23 23:59:37 cerberus kernel: [1383075.334289] <EOI> Jun 23 23:59:37 cerberus kernel: [1383075.334291] [<ffffffff96cd5c8f>] ? cpuidle_enter_state+0x9f/0x2d0 Jun 23 23:59:37 cerberus kernel: [1383075.334293] [<ffffffff968bb804>] ? cpu_startup_entry+0x154/0x240 Jun 23 23:59:37 cerberus kernel: [1383075.334295] [<ffffffff9753df5e>] ? start_kernel+0x447/0x467 Jun 23 23:59:37 cerberus kernel: [1383075.334296] [<ffffffff9753d120>] ? early_idt_handler_array+0x120/0x120 Jun 23 23:59:37 cerberus kernel: [1383075.334298] [<ffffffff9753d408>] ? x86_64_start_kernel+0x14c/0x170 Jun 23 23:59:37 cerberus kernel: [1383075.334298] ---[ end trace b3d101e108856a5b ]--- Jun 23 23:59:37 cerberus kernel: [1383075.334375] igb 0000:01:00.0 eth0: Reset adapter Jun 23 23:59:39 cerberus kernel: [1383077.222473] igb 0000:01:00.0 eth0: igb: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX Jun 24 00:00:22 cerberus ifplugd(eth0)[2279]: Link beat lost. Jun 24 00:00:26 cerberus ifplugd(eth0)[2279]: Link beat detected. Jun 24 00:00:26 cerberus kernel: [1383124.516604] igb 0000:01:00.0 eth0: Reset adapter Jun 24 00:00:43 cerberus ifplugd(eth0)[2279]: Link beat lost. Jun 24 00:00:46 cerberus ifplugd(eth0)[2279]: Link beat detected. Jun 24 00:01:03 cerberus ifplugd(eth0)[2279]: Link beat lost. Jun 24 00:01:06 cerberus ifplugd(eth0)[2279]: Link beat detected. Jun 24 00:01:18 cerberus kernel: [1383176.519167] igb 0000:01:00.0 eth0: igb: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
