[FS#3896] Kernel panic when starting hcxdumptool on mt76x2e wlan interface

Wed Jun 23 13:09:49 PDT 2021

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The following task has a new comment added:

FS#3896 - Kernel panic when starting hcxdumptool on mt76x2e wlan interface
User who did this - JuniorJPDJ (JuniorJPDJ)

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I managed to get full trace.
[code]
$ ssh root at 192.168.1.1 logread -f
Tue Jun 22 21:36:16 2021 kern.info kernel: [  810.158217] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready                                                                                                   
Tue Jun 22 21:36:16 2021 kern.info kernel: [  810.200262] device wlan1 entered promiscuous mode                                                                                                                      
Tue Jun 22 21:36:25 2021 kern.alert kernel: [  818.548196] CPU 1 Unable to handle kernel paging request at virtual address 00000010, epc == 86439038, ra == 86438dcc                                                 
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.569345] Oops[#1]:                                                                                                                                                  
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.573859] CPU: 1 PID: 9090 Comm: hcxdumptool Not tainted 5.4.124 #0                                                                                                  
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.586660] $ 0   : 00000000 00000001 00000000 00000004
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.597050] $ 4   : 87d3b02c 00000004 ffffffff 00000000
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.607441] $ 8   : 8730344e 00000000 00000002 0000001f
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.617830] $12   : 0000000a 8000001f 0000001e 0000001d
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.628219] $16   : 87d3b000 86471454 00000000 00000001
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.638608] $20   : 864981c0 00000002 00000000 00000000
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.648997] $24   : ffffffe0 00000001
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.659389] $28   : 87306000 87307bf0 00000000 86438dcc
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.669781] Hi    : 00000042
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.675496] Lo    : 0000000a
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.681356] epc   : 86439038 ieee80211_parse_tx_radiotap+0x36c/0x538 [mac80211]
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.695923] ra    : 86438dcc ieee80211_parse_tx_radiotap+0x100/0x538 [mac80211]
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.710451] Status: 11007c03      KERNEL EXL IE
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.718763] Cause : 40800008 (ExcCode 02)
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.726724] BadVA : 00000010
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.732440] PrId  : 0001992f (MIPS 1004Kc)
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.740572] Modules linked in: pppoe ppp_async iptable_nat xt_state xt_nat xt_conntrack xt_REDIRECT xt_MASQUERADE xt_FLOWOFFLOAD xt_CT wireguard rndis_host pppox ppp_g
eneric nf_nat nf_flow_table_hw nf_flow_table nf_conntrack mt76x2e mt76x2_common mt76x02_lib mt7603e mt76 mac80211 libchacha20poly1305 libblake2s ipt_REJECT cfg80211 cdc_ether xt_time xt_tcpudp xt_multiport xt_mark
 xt_mac xt_limit xt_comment xt_TCPMSS xt_LOG usbnet slhc poly1305_mips nf_reject_ipv4 nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 libcurve25519_generic libblake2s_generic iptable_mangle iptable_filter ip_tables crc_
ccitt compat chacha_mips ledtrig_usbport nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 ip6_udp_tunnel udp_tunnel sha256_generic libsha256 seqiv jitterentropy_rng drbg kpp hmac ghash_generic gf128mul gcm ctr cmac ccm leds_gpio xhci_plat_hcd xhci_pci xhci_mtk xhci_hcd gpio_button_hotplug usbcore nls_base usb_common miiTue Jun 22 21:36:25 2021 kern.warn kernel: [  818.909263] Process hcxdumptool (pid: 9090, threadinfo=b5cea4b7, task=2661394a, tls=77ee4ec8)Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.926211] Stack : 87307e04 86b067b0 869d9c80 00000000 81013d80 00000000 bfffffff 00000000Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.942828]         87303442 00000000 86bbe460 8730344e 00000008 8730344a 8730344c 0000000f
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.959444]         00000002 00000001 0000000c 0000001f 00000000 00000000 87d3b000 00000000
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.976060]         864f2000 864f2000 864981c0 807823c4 807d761a 80780000 80782ce4 8643a248
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  818.992678]         864f2050 8071da40 87d3b000 00000000 87d3b000 00000000 864f2000 00000000
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.009296]         ...
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.014157] Call Trace:
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.019060] [] ieee80211_parse_tx_radiotap+0x36c/0x538 [mac80211]
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.032967] [] ieee80211_monitor_start_xmit+0x68/0x2f8 [mac80211]
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.046859] [] dev_hard_start_xmit+0xbc/0x1ac
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.057248] [] __dev_queue_xmit+0x8b4/0xb14
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.067298] [] packet_sendmsg+0x10c0/0x1ac8
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.077363] [] sock_write_iter+0xb4/0x120
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.087070] [] __vfs_write+0x198/0x1f4
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.096254] [] vfs_write+0xb0/0x1cc
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.104916] [] ksys_write+0x64/0x10c
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.113761] [] syscall_common+0x34/0x58
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.123112] Code: 32420100  14400035  8fa2001c  1880006f  00151880  0075a821  8c420004  94430004
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.142502]
Tue Jun 22 21:36:25 2021 kern.warn kernel: [  819.145968] ---[ end trace d00727f8665d4cb7 ]---
[/code]
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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3896#comment9853

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