Re: [Intel-wired-lan] [PATCH iwl-net v4] igc: Fix Kernel Panic during ndo_tx_timeout callback

["naamax.meir" <naamax.meir@linux.intel.com>]

On 7/7/2023 05:14, Muhammad Husaini Zulkifli wrote:
> The Xeon validation group has been carrying out some loaded tests
> with various HW configurations, and they have seen some transmit
> queue time out happening during the test. This will cause the
> reset adapter function to be called by igc_tx_timeout().
> Similar race conditions may arise when the interface is being brought
> down and up in igc_reinit_locked(), an interrupt being generated, and
> igc_clean_tx_irq() being called to complete the TX.
> 
> When the igc_tx_timeout() function is invoked, this patch will turn
> off all TX ring HW queues during igc_down() process. TX ring HW queues
> will be activated again during the igc_configure_tx_ring() process
> when performing the igc_up() procedure later.
> 
> This patch also moved existing igc_disable_tx_ring_hw() to avoid using
> forward declaration.
> 
> Kernel trace:
> [ 7678.747813] ------------[ cut here ]------------
> [ 7678.757914] NETDEV WATCHDOG: enp1s0 (igc): transmit queue 2 timed out
> [ 7678.770117] WARNING: CPU: 0 PID: 13 at net/sched/sch_generic.c:525 dev_watchdog+0x1ae/0x1f0
> [ 7678.784459] Modules linked in: xt_conntrack nft_chain_nat xt_MASQUERADE xt_addrtype nft_compat
> nf_tables nfnetlink br_netfilter bridge stp llc overlay dm_mod emrcha(PO) emriio(PO) rktpm(PO)
> cegbuf_mod(PO) patch_update(PO) se(PO) sgx_tgts(PO) mktme(PO) keylocker(PO) svtdx(PO) svfs_pci_hotplug(PO)
> vtd_mod(PO) davemem(PO) svmabort(PO) svindexio(PO) usbx2(PO) ehci_sched(PO) svheartbeat(PO) ioapic(PO)
> sv8259(PO) svintr(PO) lt(PO) pcierootport(PO) enginefw_mod(PO) ata(PO) smbus(PO) spiflash_cdf(PO) arden(PO)
> dsa_iax(PO) oobmsm_punit(PO) cpm(PO) svkdb(PO) ebg_pch(PO) pch(PO) sviotargets(PO) svbdf(PO) svmem(PO)
> svbios(PO) dram(PO) svtsc(PO) targets(PO) superio(PO) svkernel(PO) cswitch(PO) mcf(PO) pentiumIII_mod(PO)
> fs_svfs(PO) mdevdefdb(PO) svfs_os_services(O) ixgbe mdio mdio_devres libphy emeraldrapids_svdefs(PO)
> regsupport(O) libnvdimm nls_cp437 snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_intel
> snd_intel_dspcfg snd_hda_codec snd_hwdep x86_pkg_temp_thermal snd_hda_core snd_pcm snd_timer isst_if_mbox_pci
> [ 7678.784496]  input_leds isst_if_mmio sg snd isst_if_common soundcore wmi button sad9(O) drm fuse backlight
> configfs efivarfs ip_tables x_tables vmd sdhci led_class rtl8150 r8152 hid_generic pegasus mmc_block usbhid
> mmc_core hid megaraid_sas ixgb igb i2c_algo_bit ice i40e hpsa scsi_transport_sas e1000e e1000 e100 ax88179_178a
> usbnet xhci_pci sd_mod xhci_hcd t10_pi crc32c_intel crc64_rocksoft igc crc64 crc_t10dif usbcore
> crct10dif_generic ptp crct10dif_common usb_common pps_core
> [ 7679.200403] RIP: 0010:dev_watchdog+0x1ae/0x1f0
> [ 7679.210201] Code: 28 e9 53 ff ff ff 4c 89 e7 c6 05 06 42 b9 00 01 e8 17 d1 fb ff 44 89 e9 4c
> 89 e6 48 c7 c7 40 ad fb 81 48 89 c2 e8 52 62 82 ff <0f> 0b e9 72 ff ff ff 65 8b 05 80 7d 7c 7e
> 89 c0 48 0f a3 05 0a c1
> [ 7679.245438] RSP: 0018:ffa00000001f7d90 EFLAGS: 00010282
> [ 7679.256021] RAX: 0000000000000000 RBX: ff11000109938440 RCX: 0000000000000000
> [ 7679.268710] RDX: ff11000361e26cd8 RSI: ff11000361e1b880 RDI: ff11000361e1b880
> [ 7679.281314] RBP: ffa00000001f7da8 R08: ff1100035f8fffe8 R09: 0000000000027ffb
> [ 7679.293840] R10: 0000000000001f0a R11: ff1100035f840000 R12: ff11000109938000
> [ 7679.306276] R13: 0000000000000002 R14: dead000000000122 R15: ffa00000001f7e18
> [ 7679.318648] FS:  0000000000000000(0000) GS:ff11000361e00000(0000) knlGS:0000000000000000
> [ 7679.332064] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 7679.342757] CR2: 00007ffff7fca168 CR3: 000000013b08a006 CR4: 0000000000471ef8
> [ 7679.354984] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [ 7679.367207] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400
> [ 7679.379370] PKRU: 55555554
> [ 7679.386446] Call Trace:
> [ 7679.393152]  <TASK>
> [ 7679.399363]  ? __pfx_dev_watchdog+0x10/0x10
> [ 7679.407870]  call_timer_fn+0x31/0x110
> [ 7679.415698]  expire_timers+0xb2/0x120
> [ 7679.423403]  run_timer_softirq+0x179/0x1e0
> [ 7679.431532]  ? __schedule+0x2b1/0x820
> [ 7679.439078]  __do_softirq+0xd1/0x295
> [ 7679.446426]  ? __pfx_smpboot_thread_fn+0x10/0x10
> [ 7679.454867]  run_ksoftirqd+0x22/0x30
> [ 7679.462058]  smpboot_thread_fn+0xb7/0x160
> [ 7679.469670]  kthread+0xcd/0xf0
> [ 7679.476097]  ? __pfx_kthread+0x10/0x10
> [ 7679.483211]  ret_from_fork+0x29/0x50
> [ 7679.490047]  </TASK>
> [ 7679.495204] ---[ end trace 0000000000000000 ]---
> [ 7679.503179] igc 0000:01:00.0 enp1s0: Register Dump
> [ 7679.511230] igc 0000:01:00.0 enp1s0: Register Name   Value
> [ 7679.519892] igc 0000:01:00.0 enp1s0: CTRL            181c0641
> [ 7679.528782] igc 0000:01:00.0 enp1s0: STATUS          40280683
> [ 7679.537551] igc 0000:01:00.0 enp1s0: CTRL_EXT        10000040
> [ 7679.546284] igc 0000:01:00.0 enp1s0: MDIC            180a3800
> [ 7679.554942] igc 0000:01:00.0 enp1s0: ICR             00000081
> [ 7679.563503] igc 0000:01:00.0 enp1s0: RCTL            04408022
> [ 7679.571963] igc 0000:01:00.0 enp1s0: RDLEN[0-3]      00001000 00001000 00001000 00001000
> [ 7679.583075] igc 0000:01:00.0 enp1s0: RDH[0-3]        00000068 000000b6 0000000f 00000031
> [ 7679.594162] igc 0000:01:00.0 enp1s0: RDT[0-3]        00000066 000000b2 0000000e 00000030
> [ 7679.605174] igc 0000:01:00.0 enp1s0: RXDCTL[0-3]     02040808 02040808 02040808 02040808
> [ 7679.616196] igc 0000:01:00.0 enp1s0: RDBAL[0-3]      1bb7c000 1bb7f000 1bb82000 0ef33000
> [ 7679.627242] igc 0000:01:00.0 enp1s0: RDBAH[0-3]      00000001 00000001 00000001 00000001
> [ 7679.638256] igc 0000:01:00.0 enp1s0: TCTL            a503f0fa
> [ 7679.646607] igc 0000:01:00.0 enp1s0: TDBAL[0-3]      2ba4a000 1bb6f000 1bb74000 1bb79000
> [ 7679.657609] igc 0000:01:00.0 enp1s0: TDBAH[0-3]      00000001 00000001 00000001 00000001
> [ 7679.668551] igc 0000:01:00.0 enp1s0: TDLEN[0-3]      00001000 00001000 00001000 00001000
> [ 7679.679470] igc 0000:01:00.0 enp1s0: TDH[0-3]        000000a7 0000002d 000000bf 000000d9
> [ 7679.690406] igc 0000:01:00.0 enp1s0: TDT[0-3]        000000a7 0000002d 000000bf 000000d9
> [ 7679.701264] igc 0000:01:00.0 enp1s0: TXDCTL[0-3]     02100108 02100108 02100108 02100108
> [ 7679.712123] igc 0000:01:00.0 enp1s0: Reset adapter
> [ 7683.085967] igc 0000:01:00.0 enp1s0: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
> [ 8086.945561] ------------[ cut here ]------------
> Entering kdb (current=0xffffffff8220b200, pid 0) on processor 0
> Oops: (null) due to oops @ 0xffffffff81573888
> RIP: 0010:dql_completed+0x148/0x160
> Code: c9 00 48 89 57 58 e9 46 ff ff ff 45 85 e4 41 0f 95 c4 41 39 db 0f 95
> c1 41 84 cc 74 05 45 85 ed 78 0a 44 89 c1 e9 27 ff ff ff <0f> 0b 01 f6 44 89
> c1 29 f1 0f 48 ca eb 8c cc cc cc cc cc cc cc cc
> RSP: 0018:ffa0000000003e00 EFLAGS: 00010287
> RAX: 000000000000006c RBX: ffa0000003eb0f78 RCX: ff11000109938000
> RDX: 0000000000000003 RSI: 0000000000000160 RDI: ff110001002e9480
> RBP: ffa0000000003ed8 R08: ff110001002e93c0 R09: ffa0000000003d28
> R10: 0000000000007cc0 R11: 0000000000007c54 R12: 00000000ffffffd9
> R13: ff1100037039cb00 R14: 00000000ffffffd9 R15: ff1100037039c048
> FS:  0000000000000000(0000) GS:ff11000361e00000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007ffff7fca168 CR3: 000000013b08a003 CR4: 0000000000471ef8
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400
> PKRU: 55555554
> Call Trace:
>   <IRQ>
>   ? igc_poll+0x1a9/0x14d0 [igc]
>   __napi_poll+0x2e/0x1b0
>   net_rx_action+0x126/0x250
>   __do_softirq+0xd1/0x295
>   irq_exit_rcu+0xc5/0xf0
>   common_interrupt+0x86/0xa0
>   </IRQ>
>   <TASK>
>   asm_common_interrupt+0x27/0x40
> RIP: 0010:cpuidle_enter_state+0xd3/0x3e0
> Code: 73 f1 ff ff 49 89 c6 8b 05 e2 ca a7 00 85 c0 0f 8f b3 02 00 00 31 ff e8 1b
> de 75 ff 80 7d d7 00 0f 85 cd 01 00 00 fb 45 85 ff <0f> 88 fd 00 00 00 49 63 cf
> 4c 2b 75 c8 48 8d 04 49 48 89 ca 48 8d
> RSP: 0018:ffffffff82203df0 EFLAGS: 00000202
> RAX: ff11000361e2a200 RBX: 0000000000000002 RCX: 000000000000001f
> RDX: 0000000000000000 RSI: 000000003cf3cf3d RDI: 0000000000000000
> RBP: ffffffff82203e28 R08: 0000075ae38471c8 R09: 0000000000000018
> R10: 000000000000031a R11: ffffffff8238dca0 R12: ffd1ffffff200000
> R13: ffffffff8238dca0 R14: 0000075ae38471c8 R15: 0000000000000002
>   cpuidle_enter+0x2e/0x50
>   call_cpuidle+0x23/0x40
>   do_idle+0x1be/0x220
>   cpu_startup_entry+0x20/0x30
>   rest_init+0xb5/0xc0
>   arch_call_rest_init+0xe/0x30
>   start_kernel+0x448/0x760
>   x86_64_start_kernel+0x109/0x150
>   secondary_startup_64_no_verify+0xe0/0xeb
>   </TASK>
> more>
> [0]kdb>
> 
> [0]kdb>
> [0]kdb> go
> Catastrophic error detected
> kdb_continue_catastrophic=0, type go a second time if you really want to
> continue
> [0]kdb> go
> Catastrophic error detected
> kdb_continue_catastrophic=0, attempting to continue
> [ 8086.955689] refcount_t: underflow; use-after-free.
> [ 8086.955697] WARNING: CPU: 0 PID: 0 at lib/refcount.c:28 refcount_warn_saturate+0xc2/0x110
> [ 8086.955706] Modules linked in: xt_conntrack nft_chain_nat xt_MASQUERADE xt_addrtype nft_compat
> nf_tables nfnetlink br_netfilter bridge stp llc overlay dm_mod emrcha(PO) emriio(PO) rktpm(PO)
> cegbuf_mod(PO) patch_update(PO) se(PO) sgx_tgts(PO) mktme(PO) keylocker(PO) svtdx(PO)
> svfs_pci_hotplug(PO) vtd_mod(PO) davemem(PO) svmabort(PO) svindexio(PO) usbx2(PO) ehci_sched(PO)
> svheartbeat(PO) ioapic(PO) sv8259(PO) svintr(PO) lt(PO) pcierootport(PO) enginefw_mod(PO) ata(PO)
> smbus(PO) spiflash_cdf(PO) arden(PO) dsa_iax(PO) oobmsm_punit(PO) cpm(PO) svkdb(PO) ebg_pch(PO)
> pch(PO) sviotargets(PO) svbdf(PO) svmem(PO) svbios(PO) dram(PO) svtsc(PO) targets(PO) superio(PO)
> svkernel(PO) cswitch(PO) mcf(PO) pentiumIII_mod(PO) fs_svfs(PO) mdevdefdb(PO) svfs_os_services(O)
> ixgbe mdio mdio_devres libphy emeraldrapids_svdefs(PO) regsupport(O) libnvdimm nls_cp437
> snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_intel snd_intel_dspcfg
> snd_hda_codec snd_hwdep x86_pkg_temp_thermal snd_hda_core snd_pcm snd_timer isst_if_mbox_pci
> [ 8086.955751]  input_leds isst_if_mmio sg snd isst_if_common soundcore wmi button sad9(O) drm
> fuse backlight configfs efivarfs ip_tables x_tables vmd sdhci led_class rtl8150 r8152 hid_generic
> pegasus mmc_block usbhid mmc_core hid megaraid_sas ixgb igb i2c_algo_bit ice i40e hpsa
> scsi_transport_sas e1000e e1000 e100 ax88179_178a usbnet xhci_pci sd_mod xhci_hcd t10_pi
> crc32c_intel crc64_rocksoft igc crc64 crc_t10dif usbcore crct10dif_generic ptp crct10dif_common
> usb_common pps_core
> [ 8086.955784] RIP: 0010:refcount_warn_saturate+0xc2/0x110
> [ 8086.955788] Code: 01 e8 82 e7 b4 ff 0f 0b 5d c3 cc cc cc cc 80 3d 68 c6 eb 00 00 75 81
> 48 c7 c7 a0 87 f6 81 c6 05 58 c6 eb 00 01 e8 5e e7 b4 ff <0f> 0b 5d c3 cc cc cc cc 80 3d
> 42 c6 eb 00 00 0f 85 59 ff ff ff 48
> [ 8086.955790] RSP: 0018:ffa0000000003da0 EFLAGS: 00010286
> [ 8086.955793] RAX: 0000000000000000 RBX: ff1100011da40ee0 RCX: ff11000361e1b888
> [ 8086.955794] RDX: 00000000ffffffd8 RSI: 0000000000000027 RDI: ff11000361e1b880
> [ 8086.955795] RBP: ffa0000000003da0 R08: 80000000ffff9f45 R09: ffa0000000003d28
> [ 8086.955796] R10: ff1100035f840000 R11: 0000000000000028 R12: ff11000319ff8000
> [ 8086.955797] R13: ff1100011bb79d60 R14: 00000000ffffffd6 R15: ff1100037039cb00
> [ 8086.955798] FS:  0000000000000000(0000) GS:ff11000361e00000(0000) knlGS:0000000000000000
> [ 8086.955800] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 8086.955801] CR2: 00007ffff7fca168 CR3: 000000013b08a003 CR4: 0000000000471ef8
> [ 8086.955803] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [ 8086.955803] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400
> [ 8086.955804] PKRU: 55555554
> [ 8086.955805] Call Trace:
> [ 8086.955806]  <IRQ>
> [ 8086.955808]  tcp_wfree+0x112/0x130
> [ 8086.955814]  skb_release_head_state+0x24/0xa0
> [ 8086.955818]  napi_consume_skb+0x9c/0x160
> [ 8086.955821]  igc_poll+0x5d8/0x14d0 [igc]
> [ 8086.955835]  __napi_poll+0x2e/0x1b0
> [ 8086.955839]  net_rx_action+0x126/0x250
> [ 8086.955843]  __do_softirq+0xd1/0x295
> [ 8086.955846]  irq_exit_rcu+0xc5/0xf0
> [ 8086.955851]  common_interrupt+0x86/0xa0
> [ 8086.955857]  </IRQ>
> [ 8086.955857]  <TASK>
> [ 8086.955858]  asm_common_interrupt+0x27/0x40
> [ 8086.955862] RIP: 0010:cpuidle_enter_state+0xd3/0x3e0
> [ 8086.955866] Code: 73 f1 ff ff 49 89 c6 8b 05 e2 ca a7 00 85 c0 0f 8f b3 02 00 00 31 ff e8
> 1b de 75 ff 80 7d d7 00 0f 85 cd 01 00 00 fb 45 85 ff <0f> 88 fd 00 00 00 49 63 cf 4c 2b 75
> c8 48 8d 04 49 48 89 ca 48 8d
> [ 8086.955867] RSP: 0018:ffffffff82203df0 EFLAGS: 00000202
> [ 8086.955869] RAX: ff11000361e2a200 RBX: 0000000000000002 RCX: 000000000000001f
> [ 8086.955870] RDX: 0000000000000000 RSI: 000000003cf3cf3d RDI: 0000000000000000
> [ 8086.955871] RBP: ffffffff82203e28 R08: 0000075ae38471c8 R09: 0000000000000018
> [ 8086.955872] R10: 000000000000031a R11: ffffffff8238dca0 R12: ffd1ffffff200000
> [ 8086.955873] R13: ffffffff8238dca0 R14: 0000075ae38471c8 R15: 0000000000000002
> [ 8086.955875]  cpuidle_enter+0x2e/0x50
> [ 8086.955880]  call_cpuidle+0x23/0x40
> [ 8086.955884]  do_idle+0x1be/0x220
> [ 8086.955887]  cpu_startup_entry+0x20/0x30
> [ 8086.955889]  rest_init+0xb5/0xc0
> [ 8086.955892]  arch_call_rest_init+0xe/0x30
> [ 8086.955895]  start_kernel+0x448/0x760
> [ 8086.955898]  x86_64_start_kernel+0x109/0x150
> [ 8086.955900]  secondary_startup_64_no_verify+0xe0/0xeb
> [ 8086.955904]  </TASK>
> [ 8086.955904] ---[ end trace 0000000000000000 ]---
> [ 8086.955912] ------------[ cut here ]------------
> [ 8086.955913] kernel BUG at lib/dynamic_queue_limits.c:27!
> [ 8086.955918] invalid opcode: 0000 [#1] SMP
> [ 8086.955922] RIP: 0010:dql_completed+0x148/0x160
> [ 8086.955925] Code: c9 00 48 89 57 58 e9 46 ff ff ff 45 85 e4 41 0f 95 c4 41 39 db
> 0f 95 c1 41 84 cc 74 05 45 85 ed 78 0a 44 89 c1 e9 27 ff ff ff <0f> 0b 01 f6 44 89
> c1 29 f1 0f 48 ca eb 8c cc cc cc cc cc cc cc cc
> [ 8086.955927] RSP: 0018:ffa0000000003e00 EFLAGS: 00010287
> [ 8086.955928] RAX: 000000000000006c RBX: ffa0000003eb0f78 RCX: ff11000109938000
> [ 8086.955929] RDX: 0000000000000003 RSI: 0000000000000160 RDI: ff110001002e9480
> [ 8086.955930] RBP: ffa0000000003ed8 R08: ff110001002e93c0 R09: ffa0000000003d28
> [ 8086.955931] R10: 0000000000007cc0 R11: 0000000000007c54 R12: 00000000ffffffd9
> [ 8086.955932] R13: ff1100037039cb00 R14: 00000000ffffffd9 R15: ff1100037039c048
> [ 8086.955933] FS:  0000000000000000(0000) GS:ff11000361e00000(0000) knlGS:0000000000000000
> [ 8086.955934] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 8086.955935] CR2: 00007ffff7fca168 CR3: 000000013b08a003 CR4: 0000000000471ef8
> [ 8086.955936] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [ 8086.955937] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400
> [ 8086.955938] PKRU: 55555554
> [ 8086.955939] Call Trace:
> [ 8086.955939]  <IRQ>
> [ 8086.955940]  ? igc_poll+0x1a9/0x14d0 [igc]
> [ 8086.955949]  __napi_poll+0x2e/0x1b0
> [ 8086.955952]  net_rx_action+0x126/0x250
> [ 8086.955956]  __do_softirq+0xd1/0x295
> [ 8086.955958]  irq_exit_rcu+0xc5/0xf0
> [ 8086.955961]  common_interrupt+0x86/0xa0
> [ 8086.955964]  </IRQ>
> [ 8086.955965]  <TASK>
> [ 8086.955965]  asm_common_interrupt+0x27/0x40
> [ 8086.955968] RIP: 0010:cpuidle_enter_state+0xd3/0x3e0
> [ 8086.955971] Code: 73 f1 ff ff 49 89 c6 8b 05 e2 ca a7 00 85 c0 0f 8f b3 02 00 00
> 31 ff e8 1b de 75 ff 80 7d d7 00 0f 85 cd 01 00 00 fb 45 85 ff <0f> 88 fd 00 00 00
> 49 63 cf 4c 2b 75 c8 48 8d 04 49 48 89 ca 48 8d
> [ 8086.955972] RSP: 0018:ffffffff82203df0 EFLAGS: 00000202
> [ 8086.955973] RAX: ff11000361e2a200 RBX: 0000000000000002 RCX: 000000000000001f
> [ 8086.955974] RDX: 0000000000000000 RSI: 000000003cf3cf3d RDI: 0000000000000000
> [ 8086.955974] RBP: ffffffff82203e28 R08: 0000075ae38471c8 R09: 0000000000000018
> [ 8086.955975] R10: 000000000000031a R11: ffffffff8238dca0 R12: ffd1ffffff200000
> [ 8086.955976] R13: ffffffff8238dca0 R14: 0000075ae38471c8 R15: 0000000000000002
> [ 8086.955978]  cpuidle_enter+0x2e/0x50
> [ 8086.955981]  call_cpuidle+0x23/0x40
> [ 8086.955984]  do_idle+0x1be/0x220
> [ 8086.955985]  cpu_startup_entry+0x20/0x30
> [ 8086.955987]  rest_init+0xb5/0xc0
> [ 8086.955990]  arch_call_rest_init+0xe/0x30
> [ 8086.955992]  start_kernel+0x448/0x760
> [ 8086.955994]  x86_64_start_kernel+0x109/0x150
> [ 8086.955996]  secondary_startup_64_no_verify+0xe0/0xeb
> [ 8086.955998]  </TASK>
> [ 8086.955999] Modules linked in: xt_conntrack nft_chain_nat xt_MASQUERADE xt_addrtype
> nft_compat nf_tables nfnetlink br_netfilter bridge stp llc overlay dm_mod emrcha(PO) emriio(PO)
> rktpm(PO) cegbuf_mod(PO) patch_update(PO) se(PO) sgx_tgts(PO) mktme(PO) keylocker(PO) svtdx(PO)
> svfs_pci_hotplug(PO) vtd_mod(PO) davemem(PO) svmabort(PO) svindexio(PO) usbx2(PO) ehci_sched(PO)
> svheartbeat(PO) ioapic(PO) sv8259(PO) svintr(PO) lt(PO) pcierootport(PO) enginefw_mod(PO) ata(PO)
> smbus(PO) spiflash_cdf(PO) arden(PO) dsa_iax(PO) oobmsm_punit(PO) cpm(PO) svkdb(PO) ebg_pch(PO)
> pch(PO) sviotargets(PO) svbdf(PO) svmem(PO) svbios(PO) dram(PO) svtsc(PO) targets(PO) superio(PO)
> svkernel(PO) cswitch(PO) mcf(PO) pentiumIII_mod(PO) fs_svfs(PO) mdevdefdb(PO) svfs_os_services(O)
> ixgbe mdio mdio_devres libphy emeraldrapids_svdefs(PO) regsupport(O) libnvdimm nls_cp437
> snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_intel snd_intel_dspcfg
> snd_hda_codec snd_hwdep x86_pkg_temp_thermal snd_hda_core snd_pcm snd_timer isst_if_mbox_pci
> [ 8086.956029]  input_leds isst_if_mmio sg snd isst_if_common soundcore wmi button sad9(O) drm
> fuse backlight configfs efivarfs ip_tables x_tables vmd sdhci led_class rtl8150 r8152 hid_generic
> pegasus mmc_block usbhid mmc_core hid megaraid_sas ixgb igb i2c_algo_bit ice i40e hpsa
> scsi_transport_sas e1000e e1000 e100 ax88179_178a usbnet xhci_pci sd_mod xhci_hcd t10_pi
> crc32c_intel crc64_rocksoft igc crc64 crc_t10dif usbcore crct10dif_generic ptp crct10dif_common
> usb_common pps_core
> [16762.543675] INFO: NMI handler (kgdb_nmi_handler) took too long to run: 8675587.593 msecs
> [16762.543678] INFO: NMI handler (kgdb_nmi_handler) took too long to run: 8675587.595 msecs
> [16762.543673] INFO: NMI handler (kgdb_nmi_handler) took too long to run: 8675587.495 msecs
> [16762.543679] INFO: NMI handler (kgdb_nmi_handler) took too long to run: 8675587.599 msecs
> [16762.543678] INFO: NMI handler (kgdb_nmi_handler) took too long to run: 8675587.598 msecs
> [16762.543690] INFO: NMI handler (kgdb_nmi_handler) took too long to run: 8675587.605 msecs
> [16762.543684] INFO: NMI handler (kgdb_nmi_handler) took too long to run: 8675587.599 msecs
> [16762.543693] INFO: NMI handler (kgdb_nmi_handler) took too long to run: 8675587.613 msecs
> [16762.543784] ---[ end trace 0000000000000000 ]---
> [16762.849099] RIP: 0010:dql_completed+0x148/0x160
> PANIC: Fatal exception in interrupt
> 
> Fixes: 9b275176270e ("igc: Add ndo_tx_timeout support")
> Tested-by: Alejandra Victoria Alcaraz <alejandra.victoria.alcaraz@intel.com>
> Signed-off-by: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@intel.com>
> ---
> V3 -> V4 : Changed the commit message
> V2 -> V3 : Fixed kernel test robot warning about missing prototype of "igc_disable_tx_ring_hw"
> V1 -> V2 : Removed forward declaration function suggested by Vinicius
> ---
>   drivers/net/ethernet/intel/igc/igc_main.c | 40 ++++++++++++++++-------
>   1 file changed, 28 insertions(+), 12 deletions(-)

Tested-by: Naama Meir <naamax.meir@linux.intel.com>
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