System crashes at `efx_ptp_tx+0x2e`

Issue

• System crashed with the below log.

...
[98153.379995] oo:grep[186496]: Unknown option "EF_SO_TIMESTAMP_RESYNC_TIME=100000" identified
[98153.379999] oo:cut[186497]: Unknown option "EF_SO_TIMESTAMP_RESYNC_TIME=100000" identified
[98153.380000] oo:grep[186496]: Unknown option "EF_MULTICAST=1" identified
[98153.380004] oo:cut[186497]: Unknown option "EF_MULTICAST=1" identified
[98153.382784] oo:grep[186503]: Unknown option "EF_SO_TIMESTAMP_RESYNC_TIME=100000" identified
[98153.382788] oo:grep[186503]: Unknown option "EF_MULTICAST=1" identified
[98153.396382] oo:ps[186502]: Unknown option "EF_SO_TIMESTAMP_RESYNC_TIME=100000" identified
[98153.396386] oo:ps[186502]: Unknown option "EF_MULTICAST=1" identified
[98153.420752] oo:grep[186506]: Unknown option "EF_SO_TIMESTAMP_RESYNC_TIME=100000" identified
[98153.420756] oo:grep[186506]: Unknown option "EF_MULTICAST=1" identified
[98153.424749] oo:cut[186507]: Unknown option "EF_SO_TIMESTAMP_RESYNC_TIME=100000" identified
[98153.424752] oo:cut[186507]: Unknown option "EF_MULTICAST=1" identified
[98154.647520] [onload] [0]: unable to allocate huge page, using standard pages instead
[116150.609021] BUG: unable to handle kernel NULL pointer dereference at 0000000000000026
[116150.609034] IP: [<ffffffffa035478e>] efx_ptp_tx+0x2e/0x80 [sfc]
[116150.609035] PGD 83030f067 PUD 830fbd067 PMD 0 
[116150.609036] Oops: 0000 [#1] PREEMPT SMP 
[116150.609055] Modules linked in: mpt2sas scsi_transport_sas mptctl mptbase dell_rbu nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss oid_registry nfsv4 nfs fscache lockd sunrpc grace ipv6 iTCO_wdt iTCO_vendor_support mxm_wmi dcdbas pcspkr onload(O) onload_cplane(PO) sfc_char(O) sfc_resource(O) sfc_affinity(O) sfc(O) mtd mdio sb_edac edac_core sr_mod cdrom joydev shpchp ipmi_devintf ipmi_si ipmi_msghandler lpc_ich sg igb dca ptp pps_core acpi_power_meter hwmon ext4 jbd2 mbcache sd_mod crc_t10dif crct10dif_common usb_storage megaraid_sas aesni_intel ablk_helper cryptd lrw gf128mul glue_helper aes_x86_64 ahci libahci wmi mgag200 ttm drm_kms_helper drm i2c_algo_bit sysimgblt sysfillrect i2c_core syscopyarea dm_mirror dm_region_hash dm_log dm_mod
[116150.609057] CPU: 0 PID: 9250 Comm: sfptpd Tainted: P           O   ------------   3.10.0-327.rt56.198.el6rt.x86_64 #1
[116150.609057] Hardware name: Dell Inc. PowerEdge R630/02C2CP, BIOS 2.9.1 12/04/2018
[116150.609058] task: ffff8808313f98c0 ti: ffff8808302b4000 task.ti: ffff8808302b4000
[116150.609066] RIP: 0010:[<ffffffffa035478e>]  [<ffffffffa035478e>] efx_ptp_tx+0x2e/0x80 [sfc]
[116150.609067] RSP: 0018:ffff8808302b7878  EFLAGS: 00010296
[116150.609067] RAX: 0000000000000000 RBX: ffff880832200700 RCX: 0000000000000000
[116150.609068] RDX: 0000000000000024 RSI: 0000000000000000 RDI: ffff8808313f98c0
[116150.609068] RBP: ffff8808302b7888 R08: ffff8808302b4000 R09: 0000000000000001
[116150.609069] R10: ffff8808305bbb00 R11: 0000000000000001 R12: ffff881036318000
[116150.609069] R13: ffff880830aa2000 R14: ffff881037c98000 R15: 0000000000000056
[116150.609070] FS:  00007fa1e3bec700(0000) GS:ffff88085e600000(0000) knlGS:0000000000000000
[116150.609070] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[116150.609071] CR2: 0000000000000026 CR3: 0000000832019000 CR4: 00000000003407f0
[116150.609071] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[116150.609072] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[116150.609072] Stack:
[116150.609074]  ffff880832200700 ffff881037c98940 ffff8808302b78b8 ffffffffa0344bb5
[116150.609075]  ffff8808302b78d8 ffff880832200700 ffff881036c30000 0000000000000000
[116150.609076]  ffff8808302b7938 ffffffff8151a79b ffff8808313f98c0 ffff8808302b7964
[116150.609077] Call Trace:
[116150.609085]  [<ffffffffa0344bb5>] efx_hard_start_xmit+0xa5/0xc0 [sfc]
[116150.609089]  [<ffffffff8151a79b>] dev_hard_start_xmit+0xab/0x1a0
[116150.609091]  [<ffffffff8153bf91>] sch_direct_xmit+0x101/0x200
[116150.609092]  [<ffffffff8151b9d7>] dev_queue_xmit+0x1c7/0x5c0
[116150.609094]  [<ffffffff81567613>] ip_finish_output+0x263/0x4e0
[116150.609095]  [<ffffffff81564eb1>] ? __ip_make_skb+0x2e1/0x3f0
[116150.609096]  [<ffffffff8156796b>] ip_mc_output+0xdb/0x250
[116150.609098]  [<ffffffff81565c5b>] ip_local_out_sk+0x3b/0x50
[116150.609099]  [<ffffffff81565c8a>] ip_send_skb+0x1a/0x50
[116150.609101]  [<ffffffff81590b9e>] udp_send_skb+0x11e/0x380
[116150.609102]  [<ffffffff81565540>] ? ip_append_page+0x430/0x430
[116150.609103]  [<ffffffff81591404>] udp_sendmsg+0x544/0x970
[116150.609106]  [<ffffffff812c45e0>] ? timerqueue_add+0x60/0xb0
[116150.609108]  [<ffffffff8159e74d>] inet_sendmsg+0x8d/0xd0
[116150.609110]  [<ffffffff814ff616>] sock_sendmsg+0xa6/0xd0
[116150.609114]  [<ffffffff81074ce5>] ? set_current_blocked+0x15/0x20
[116150.609118]  [<ffffffff811cbe57>] ? fget_light+0x97/0xf0
[116150.609119]  [<ffffffff814fccf9>] ? copy_from_user+0x9/0x10
[116150.609120]  [<ffffffff814ff774>] SYSC_sendto+0x134/0x180
[116150.609123]  [<ffffffff81148063>] ? context_tracking_user_exit+0x13/0x20
[116150.609126]  [<ffffffff81011349>] ? syscall_trace_enter+0x219/0x270
[116150.609127]  [<ffffffff814ff7ce>] SyS_sendto+0xe/0x10
[116150.609130]  [<ffffffff815fdca8>] tracesys+0xdd/0xe2
[116150.609140] Code: e5 41 54 53 0f 1f 44 00 00 4c 8b a7 20 0e 00 00 48 89 f3 49 8d 7c 24 68 e8 b0 31 1b e1 0f b7 93 c0 00 00 00 48 8b 83 e0 00 00 00 <66> 81 7c 10 02 01 3f 74 29 49 8b b4 24 48 02 00 00 49 8d 94 24 
[116150.609147] RIP  [<ffffffffa035478e>] efx_ptp_tx+0x2e/0x80 [sfc]
[116150.609147]  RSP <ffff8808302b7878>
[116150.609148] CR2: 0000000000000026
[116150.610118] ------------[ cut here ]------------
[116150.610118] kernel BUG at arch/x86/mm/pageattr.c:216!
[116150.610119] invalid opcode: 0000 [#2] PREEMPT SMP 
[116150.610133] Modules linked in: mpt2sas scsi_transport_sas mptctl mptbase dell_rbu nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss oid_registry nfsv4 nfs fscache lockd sunrpc grace ipv6 iTCO_wdt iTCO_vendor_support mxm_wmi dcdbas pcspkr onload(O) onload_cplane(PO) sfc_char(O) sfc_resource(O) sfc_affinity(O) sfc(O) mtd mdio sb_edac edac_core sr_mod cdrom joydev shpchp ipmi_devintf ipmi_si ipmi_msghandler lpc_ich sg igb dca ptp pps_core acpi_power_meter hwmon ext4 jbd2 mbcache sd_mod crc_t10dif crct10dif_common usb_storage megaraid_sas aesni_intel ablk_helper cryptd lrw gf128mul glue_helper aes_x86_64 ahci libahci wmi mgag200 ttm drm_kms_helper drm i2c_algo_bit sysimgblt sysfillrect i2c_core syscopyarea dm_mirror dm_region_hash dm_log dm_mod
[116150.610134] CPU: 0 PID: 9250 Comm: sfptpd Tainted: P           O   ------------   3.10.0-327.rt56.198.el6rt.x86_64 #1
[116150.610134] Hardware name: Dell Inc. PowerEdge R630/02C2CP, BIOS 2.9.1 12/04/2018
[116150.610135] task: ffff8808313f98c0 ti: ffff8808302b4000 task.ti: ffff8808302b4000
[116150.610138] RIP: 0010:[<ffffffff8104e7d6>]  [<ffffffff8104e7d6>] change_page_attr_set_clr+0x4a6/0x4b0
[116150.610139] RSP: 0018:ffff8808302b6988  EFLAGS: 00010046
[116150.610139] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 0000000000000010
[116150.610140] RDX: 00000000000373da RSI: 0000000080000000 RDI: 0000000080000000
[116150.610140] RBP: ffff8808302b6a38 R08: 0000000000000001 R09: 0000000000000000
[116150.610141] R10: 0000000000000000 R11: 0000000040000004 R12: 0000000000000005
[116150.610141] R13: 0000000000000010 R14: 0000000000000000 R15: 0000000000000000
[116150.610142] FS:  00007fa1e3bec700(0000) GS:ffff88085e600000(0000) knlGS:0000000000000000
[116150.610142] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[116150.610142] CR2: 0000000000000026 CR3: 0000000832019000 CR4: 00000000003407f0
[116150.610143] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[116150.610143] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[116150.610144] Stack:
[116150.610145]  0000000000000000 0000000000000000 0000000000000010 0000000000000008
[116150.610146]  0000000000000000 0000000000000000 0000000000000000 0000000000000000
[116150.610148]  0000000000000010 0000000000000000 0000000500000001 00000000000373da
[116150.610148] Call Trace:
[116150.610150]  [<ffffffff8104eaba>] _set_pages_array+0xea/0x140
[116150.610152]  [<ffffffff8104eb23>] set_pages_array_wc+0x13/0x20
[116150.610156]  [<ffffffffa00b3b8e>] ttm_set_pages_caching+0x4e/0x80 [ttm]
[116150.610160]  [<ffffffffa00b4146>] ttm_alloc_new_pages+0xb6/0x180 [ttm]
[116150.610164]  [<ffffffffa00b42b4>] ttm_page_pool_fill_locked.clone.1+0xa4/0x150 [ttm]
[116150.610167]  [<ffffffffa00b43b0>] ttm_page_pool_get_pages.clone.2+0x50/0x100 [ttm]
[116150.610171]  [<ffffffffa00b44fb>] ttm_get_pages.clone.0+0x9b/0x200 [ttm]
[116150.610174]  [<ffffffffa00b46ec>] ttm_pool_populate+0x8c/0xf0 [ttm]
[116150.610178]  [<ffffffffa00b0574>] ? ttm_mem_reg_ioremap+0x64/0x100 [ttm]
[116150.610181]  [<ffffffffa00f9f4e>] mgag200_ttm_tt_populate+0xe/0x10 [mgag200]
[116150.610185]  [<ffffffffa00b0bc0>] ttm_bo_move_memcpy+0x530/0x570 [ttm]
[116150.610188]  [<ffffffffa00ac72c>] ? ttm_tt_init+0x8c/0xb0 [ttm]
[116150.610190]  [<ffffffff811832e6>] ? __vmalloc_node_range+0x86/0xd0
[116150.610194]  [<ffffffffa00f9e78>] mgag200_bo_move+0x18/0x20 [mgag200]
[116150.610197]  [<ffffffffa00acdd9>] ttm_bo_handle_move_mem+0x299/0x650 [ttm]
[116150.610201]  [<ffffffffa00af5de>] ttm_bo_validate+0x1de/0x1f0 [ttm]
[116150.610204]  [<ffffffffa00fa043>] mgag200_bo_push_sysram+0x83/0xd0 [mgag200]
[116150.610207]  [<ffffffffa00f6dbf>] mga_crtc_do_set_base.clone.0+0x7f/0x1e0 [mgag200]
[116150.610210]  [<ffffffffa00f7a61>] mga_crtc_mode_set+0xb41/0xe60 [mgag200]
[116150.610212]  [<ffffffff815f5940>] ? rt_spin_unlock+0x40/0x40
[116150.610223]  [<ffffffffa006fe98>] ? drm_mode_create+0x48/0x70 [drm]
[116150.610227]  [<ffffffffa00c4999>] drm_crtc_helper_set_mode+0x389/0x5d0 [drm_kms_helper]
[116150.610232]  [<ffffffffa00c5a49>] drm_crtc_helper_set_config+0x879/0xae0 [drm_kms_helper]
[116150.610234]  [<ffffffff815f59de>] ? _mutex_trylock+0xe/0x10
[116150.610242]  [<ffffffffa006c1e6>] drm_mode_set_config_internal+0x66/0x110 [drm]
[116150.610247]  [<ffffffffa00d0841>] drm_fb_helper_pan_display+0x111/0x160 [drm_kms_helper]
[116150.610249]  [<ffffffff8131f0c6>] fb_pan_display+0xe6/0x140
[116150.610251]  [<ffffffff81330d4a>] bit_update_start+0x2a/0x60
[116150.610252]  [<ffffffff8132cf56>] fbcon_switch+0x386/0x530
[116150.610254]  [<ffffffff81395a89>] redraw_screen+0x179/0x240
[116150.610256]  [<ffffffff8132cb1a>] fbcon_blank+0x21a/0x2d0
[116150.610258]  [<ffffffff810724f6>] ? mod_timer+0x156/0x290
[116150.610259]  [<ffffffff81396568>] do_unblank_screen+0xa8/0x1d0
[116150.610261]  [<ffffffff813966a0>] unblank_screen+0x10/0x20
[116150.610263]  [<ffffffff812cae1d>] bust_spinlocks+0x1d/0x40
[116150.610264]  [<ffffffff815f72d0>] oops_end+0x40/0xf0
[116150.610265]  [<ffffffff8104b9fe>] no_context+0x11e/0x1f0
[116150.610267]  [<ffffffff8104bbed>] __bad_area_nosemaphore+0x11d/0x220
[116150.610268]  [<ffffffff8104bd03>] bad_area_nosemaphore+0x13/0x20
[116150.610270]  [<ffffffff815f977f>] __do_page_fault+0x11f/0x4b0
[116150.610271]  [<ffffffff815f9bcd>] do_page_fault+0x2d/0x80
[116150.610272]  [<ffffffff815f65f2>] page_fault+0x22/0x30
[116150.610280]  [<ffffffffa035478e>] ? efx_ptp_tx+0x2e/0x80 [sfc]
[116150.610288]  [<ffffffffa0354780>] ? efx_ptp_tx+0x20/0x80 [sfc]
[116150.610295]  [<ffffffffa0344bb5>] efx_hard_start_xmit+0xa5/0xc0 [sfc]
[116150.610296]  [<ffffffff8151a79b>] dev_hard_start_xmit+0xab/0x1a0
[116150.610297]  [<ffffffff8153bf91>] sch_direct_xmit+0x101/0x200
[116150.610299]  [<ffffffff8151b9d7>] dev_queue_xmit+0x1c7/0x5c0
[116150.610300]  [<ffffffff81567613>] ip_finish_output+0x263/0x4e0
[116150.610301]  [<ffffffff81564eb1>] ? __ip_make_skb+0x2e1/0x3f0
[116150.610302]  [<ffffffff8156796b>] ip_mc_output+0xdb/0x250
[116150.610304]  [<ffffffff81565c5b>] ip_local_out_sk+0x3b/0x50
[116150.610305]  [<ffffffff81565c8a>] ip_send_skb+0x1a/0x50
[116150.610306]  [<ffffffff81590b9e>] udp_send_skb+0x11e/0x380
[116150.610307]  [<ffffffff81565540>] ? ip_append_page+0x430/0x430
[116150.610308]  [<ffffffff81591404>] udp_sendmsg+0x544/0x970
[116150.610310]  [<ffffffff812c45e0>] ? timerqueue_add+0x60/0xb0
[116150.610311]  [<ffffffff8159e74d>] inet_sendmsg+0x8d/0xd0
[116150.610313]  [<ffffffff814ff616>] sock_sendmsg+0xa6/0xd0
[116150.610315]  [<ffffffff81074ce5>] ? set_current_blocked+0x15/0x20
[116150.610317]  [<ffffffff811cbe57>] ? fget_light+0x97/0xf0
[116150.610318]  [<ffffffff814fccf9>] ? copy_from_user+0x9/0x10
[116150.610319]  [<ffffffff814ff774>] SYSC_sendto+0x134/0x180
[116150.610321]  [<ffffffff81148063>] ? context_tracking_user_exit+0x13/0x20
[116150.610322]  [<ffffffff81011349>] ? syscall_trace_enter+0x219/0x270
[116150.610323]  [<ffffffff814ff7ce>] SyS_sendto+0xe/0x10
[116150.610325]  [<ffffffff815fdca8>] tracesys+0xdd/0xe2
[116150.610335] Code: ff 48 8b 85 58 ff ff ff e9 1a fc ff ff 0f 0b eb fe 0f 0b eb fe be ba 00 00 00 48 c7 c7 39 94 7f 81 e8 2f fc 00 00 e9 0e ff ff ff <0f> 0b eb fe 66 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 
[116150.610337] RIP  [<ffffffff8104e7d6>] change_page_attr_set_clr+0x4a6/0x4b0
[116150.610337]  RSP <ffff8808302b6988>
[116151.920063] ---[ end trace 0000000000000002 ]---
[116151.996418] NOHZ: local_softirq_pending 102
[116151.998580] NOHZ: local_softirq_pending 102
[116151.999153] NOHZ: local_softirq_pending 102
[116151.999158] NOHZ: local_softirq_pending 102
[116151.999581] NOHZ: local_softirq_pending 102
[116151.999582] NOHZ: local_softirq_pending 102
[116151.999660] NOHZ: local_softirq_pending 102
[116152.000165] NOHZ: local_softirq_pending 102
[116152.000179] NOHZ: local_softirq_pending 102
[116152.000186] NOHZ: local_softirq_pending 102
[116152.021326] [sched_delayed] sched: RT throttling activated
[116174.183697] TCP: request_sock_TCP: Possible SYN flooding on port 7003. Sending cookies.  Check SNMP counters.