OpenWrt/LEDE Project

  • Status Unconfirmed
  • Percent Complete
    0%
  • Task Type Bug Report
  • Category Base system
  • Assigned To No-one
  • Operating System All
  • Severity Critical
  • Priority Very Low
  • Reported Version Trunk
  • Due in Version Undecided
  • Due Date Undecided
  • Private
Attached to Project: OpenWrt/LEDE Project
Opened by Bartosz Markocki - 16.05.2018

FS#1550 - Unable to handle kernel paging request causes router to reboot

- Device problem occurs on
Xiaomi mi router 3G (R3G)

- Software versions of OpenWrt/LEDE release, packages, etc.
Latest trunk (r6893-bfbdeeb) custom build

- Steps to reproduce
Did not notice there is a pattern here.

- The issue
The kernel crash causes the router to reboot. Here are two traces I was able to catch

May 13 07:24:52 router kernel: [82948.434471] CPU 1 Unable to handle kernel paging request at virtual address 07407800, epc == 80136a70, ra == 8013694c
May 13 07:24:52 router kernel: [82948.445103] Oops[#1]:
May 13 07:24:52 router kernel: [82948.447387] CPU: 1 PID: 1977 Comm: kworker/u8:1 Not tainted 4.14.37 #0
May 13 07:24:52 router kernel: [82948.453909] Workqueue: writeback wb_workfn (flush-8:0)
May 13 07:24:52 router kernel: [82948.459046] task: 8ff3ddc0 task.stack: 8dd62000
May 13 07:24:52 router kernel: [82948.463565] $ 0 : 00000000 00000001 00000000 812286b0
May 13 07:24:52 router kernel: [82948.468800] $ 4 : 805aa44c 00000001 00000001 07407800
May 13 07:24:52 router kernel: [82948.474019] $ 8 : 000facb3 000facb2 00000002 00064000
May 13 07:24:52 router kernel: [82948.479248] $12 : 00000009 0004001a fffeffff 00001000
May 13 07:24:52 router kernel: [82948.484473] $16 : 8fc02c00 000001b8 01011200 8022b6f0
May 13 07:24:52 router kernel: [82948.489695] $20 : 8ebb0000 8006a664 8e56d81c 01400000
May 13 07:24:52 router kernel: [82948.494913] $24 : 81196320 00000000
May 13 07:24:52 router kernel: [82948.500133] $28 : 8dd62000 8dd63950 8fd77d40 8013694c
May 13 07:24:52 router kernel: [82948.505351] Hi : 00000000
May 13 07:24:52 router kernel: [82948.508214] Lo : 00840480
May 13 07:24:52 router kernel: [82948.511113] epc : 80136a70 kmalloc+0x1f8/0x2ec
May 13 07:24:52 router kernel: [82948.515887] ra : 8013694c
kmalloc+0xd4/0x2ec
May 13 07:24:52 router kernel: [82948.520568] Status: 11007c03#011KERNEL EXL IE May 13 07:24:52 router kernel: [82948.524750] Cause : 40800008 (ExcCode 02)
May 13 07:24:52 router kernel: [82948.528740] BadVA : 07407800
May 13 07:24:52 router kernel: [82948.531605] PrId : 0001992f (MIPS 1004Kc)
May 13 07:24:52 router kernel: [82948.535679] Modules linked in: pppoe ppp_async pppox ppp_generic nf_conntrack_ipv6 mt76x2e mt7603e mt76 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE cfg80211 cdc_ether xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state xt_recent xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_hl xt_helper xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_HL xt_FLOWOFFLOAD xt_DSCP xt_CLASSIFY usbnet slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_flow_table_hw nf_flow_table nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack libcrc32c iptable_mangle iptable_filter ipt_ECN ip_tables crc_ccitt compat ledtrig_usbport xt_set ip_set_list_set ip_set_hash_netiface ip_set_hash_netport
May 13 07:24:52 router kernel: [82948.606444] ip_set_hash_netnet ip_set_hash_net ip_set_hash_netportnet ip_set_hash_mac ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_hash_ipport ip_set_hash_ipmark ip_set_hash_ip ip_set_bitmap_port ip_set_bitmap_ipmac ip_set_bitmap_ip ip_set nfnetlink ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables x_tables vfat fat nls_utf8 nls_iso8859_1 nls_cp437 usb_storage leds_gpio xhci_mtk xhci_plat_hcd xhci_pci xhci_hcd sd_mod scsi_mod gpio_button_hotplug ext4 jbd2 mbcache usbcore nls_base usb_common mii crc32c_generic
May 13 07:24:52 router kernel: [82948.655996] Process kworker/u8:1 (pid: 1977, threadinfo=8dd62000, task=8ff3ddc0, tls=00000000)
May 13 07:24:52 router kernel: [82948.664578] Stack : 01011200 00400000 8006a664 8f0c719c 00000001 00000000 8fd33300 01011200
May 13 07:24:52 router kernel: [82948.672925] 8fe74850 01011200 00000001 00400000 8006a664 8022b6f0 8fe74850 01011200
May 13 07:24:52 router kernel: [82948.681267] 01411200 8fdf9e00 01011200 01411200 8e56d800 800ecd30 8fe74850 01011200
May 13 07:24:52 router kernel: [82948.689609] 01411200 8fdf9d00 01400000 00400000 8006a664 800ecd30 00060000 00000001
May 13 07:24:52 router kernel: [82948.697952] 8dd63a48 8fe74850 00000000 8fe74850 00000001 8fe74850 00000000 8fe74878
May 13 07:24:52 router kernel: [82948.706292] ...
May 13 07:24:52 router kernel: [82948.708733] Call Trace:
May 13 07:24:52 router kernel: [82948.711201] [<80136a70>] __kmalloc+0x1f8/0x2ec
May 13 07:24:52 router kernel: [82948.715643] [<8022b6f0>] alloc_request_size+0x2c/0x7c
May 13 07:24:52 router kernel: [82948.720708] [<800ecd30>] mempool_alloc+0x6c/0×178 May 13 07:24:52 router kernel: [82948.725402] [<8022cf88>] get_request+0×360/0x76c
May 13 07:24:52 router kernel: [82948.730005] [<802303c4>] blk_queue_bio+0x1cc/0×430 May 13 07:24:52 router kernel: [82948.734781] [<8022e3cc>] generic_make_request+0xd8/0×288 May 13 07:24:52 router kernel: [82948.740078] [<8022e6a0>] submit_bio+0×124/0×164 May 13 07:24:52 router kernel: [82948.744663] [<8f1c3014>] ext4_io_submit+0×50/0×64 [ext4]
May 13 07:24:52 router kernel: [82948.749989] [<8f1a5994>] ext4_mark_inode_dirty+0xeac/0×1368 [ext4]
May 13 07:24:52 router kernel: [82948.756166] Code: 32428000 8e020014 00e23821 <8ce20000> 1000002c cc400000 1280ffbc 00000000 8e060010
May 13 07:24:52 router kernel: [82948.765910]
May 13 07:24:52 router kernel: [82948.767638] —[ end trace e8f9893fb33e6a26 ]—

and the second case

May 15 15:52:16 router kernel: [67618.480256] CPU 0 Unable to handle kernel paging request at virtual address 07402800, epc == 80136784, ra == 800ecd30
May 15 15:52:16 router kernel: [67618.490997] Oops[#1]:
May 15 15:52:16 router kernel: [67618.493275] CPU: 0 PID: 14159 Comm: kworker/u8:1 Not tainted 4.14.37 #0
May 15 15:52:16 router kernel: [67618.499875] Workqueue: writeback wb_workfn (flush-8:0)
May 15 15:52:16 router kernel: [67618.504997] task: 8c3276c0 task.stack: 8b656000
May 15 15:52:16 router kernel: [67618.509500] $ 0 : 00000000 00000001 00000000 8121a6c0
May 15 15:52:16 router kernel: [67618.514709] $ 4 : 805aa44c 00000001 00000001 07402800
May 15 15:52:16 router kernel: [67618.519918] $ 8 : 00005ddf 00005dde 8fb9b6a0 00000120
May 15 15:52:16 router kernel: [67618.525127] $12 : 8000001f 00000010 00000124 00000001
May 15 15:52:16 router kernel: [67618.530336] $16 : 8fd4a200 01011200 800ecd30 8b0e0000
May 15 15:52:16 router kernel: [67618.535545] $20 : 00400000 8006a664 8fd4981c 80660000
May 15 15:52:16 router kernel: [67618.540754] $24 : ffffffe0 ffff0000
May 15 15:52:16 router kernel: [67618.545963] $28 : 8b656000 8b657970 8f1c2c24 800ecd30
May 15 15:52:16 router kernel: [67618.551174] Hi : 00000000
May 15 15:52:16 router kernel: [67618.554035] Lo : 008402f0
May 15 15:52:16 router kernel: [67618.556924] epc : 80136784 kmem_cache_alloc+0x13c/0×230 May 15 15:52:16 router kernel: [67618.562323] ra : 800ecd30 mempool_alloc+0x6c/0×178 May 15 15:52:16 router kernel: [67618.567345] Status: 11008403#011KERNEL EXL IE May 15 15:52:16 router kernel: [67618.571515] Cause : 40800008 (ExcCode 02)
May 15 15:52:16 router kernel: [67618.575499] BadVA : 07402800
May 15 15:52:16 router kernel: [67618.578361] PrId : 0001992f (MIPS 1004Kc)
May 15 15:52:16 router kernel: [67618.582431] Modules linked in: pppoe ppp_async pppox ppp_generic nf_conntrack_ipv6 mt76x2e mt7603e mt76 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE cfg80211 cdc_ether xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state xt_recent xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_hl xt_helper xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_HL xt_FLOWOFFLOAD xt_DSCP xt_CLASSIFY usbnet slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_flow_table_hw nf_flow_table nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack libcrc32c iptable_mangle iptable_filter ipt_ECN ip_tables crc_ccitt compat ledtrig_usbport xt_set ip_set_list_set ip_set_hash_netiface ip_set_hash_netport
May 15 15:52:16 router kernel: [67618.653177] ip_set_hash_netnet ip_set_hash_net ip_set_hash_netportnet ip_set_hash_mac ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_hash_ipport ip_set_hash_ipmark ip_set_hash_ip ip_set_bitmap_port ip_set_bitmap_ipmac ip_set_bitmap_ip ip_set nfnetlink ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables x_tables vfat fat nls_utf8 nls_iso8859_1 nls_cp437 usb_storage leds_gpio xhci_mtk xhci_plat_hcd xhci_pci xhci_hcd sd_mod scsi_mod gpio_button_hotplug ext4 jbd2 mbcache usbcore nls_base usb_common mii crc32c_generic
May 15 15:52:16 router kernel: [67618.702675] Process kworker/u8:1 (pid: 14159, threadinfo=8b656000, task=8c3276c0, tls=00000000)
May 15 15:52:16 router kernel: [67618.711326] Stack : 8e648b20 8f147e00 8e648b20 01011200 00000001 8022b710 00000002 01011200
May 15 15:52:16 router kernel: [67618.719658] 01411200 8fd49800 01400000 00400000 8006a664 800ecd30 00000001 01011200
May 15 15:52:16 router kernel: [67618.727990] 01411200 8fd49700 01400000 00400000 8006a664 800ecd30 8e330030 8c499000
May 15 15:52:16 router kernel: [67618.736322] 8fd9f000 8b657a2c 01400000 8fd49800 01400000 01400000 8e47fa00 8d44d8f8
May 15 15:52:16 router kernel: [67618.744655] 80660000 80225974 8fd49600 00000100 01400000 8d48d7c0 8e47fa00 8fd49600
May 15 15:52:16 router kernel: [67618.752989] ...
May 15 15:52:16 router kernel: [67618.755425] Call Trace:
May 15 15:52:16 router kernel: [67618.757859] [<80136784>] kmem_cache_alloc+0x13c/0×230 May 15 15:52:16 router kernel: [67618.762897] [<800ecd30>] mempool_alloc+0x6c/0×178 May 15 15:52:16 router kernel: [67618.767596] [<80225974>] bvec_alloc+0xdc/0×154 May 15 15:52:16 router kernel: [67618.772020] [<80225b44>] bio_alloc_bioset+0×158/0×250 May 15 15:52:16 router kernel: [67618.777111] [<8f1c3358>] ext4_bio_write_page+0×320/0x5c4 [ext4]
May 15 15:52:16 router kernel: [67618.783028] [<8f19e3f4>] ext4_convert_inline_data+0×874/0x21a8 [ext4]
May 15 15:52:16 router kernel: [67618.789461] [<8f19e860>] ext4_convert_inline_data+0xce0/0x21a8 [ext4]
May 15 15:52:16 router kernel: [67618.795881] Code: 32228000 8e020014 00e23821 <8ce20000> 1000002d cc400000 1260ffbc 00000000 8e060010
May 15 15:52:16 router kernel: [67618.805607]
May 15 15:52:16 router kernel: [67618.807332] —[ end trace 3b32ff5399a1bc64 ]—


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