Oct 23 21:30:48 kernel: CPU: 0 PID: 9962 Comm: lighttpd Tainted: P O 4.19.275 #1
Oct 23 21:30:48 kernel: Hardware name: Broadcom-v8A (DT)
Oct 23 21:30:48 kernel: pstate: 600b0010 (nZCv q A32 LE aif)
Oct 23 21:30:48 kernel: pc : 00000000f7211c5c
Oct 23 21:30:48 kernel: lr : 00000000f7211c54
Oct 23 21:30:48 kernel: sp : 00000000ff89d8d8
Oct 23 21:30:48 kernel: x12: 00000000f72291dc
Oct 23 21:30:48 kernel: x11: 0000000001f81b98 x10: 0000000001f09190
Oct 23 21:30:48 kernel: x9 : 0000000001f22b30 x8 : 0000000000000041
Oct 23 21:30:48 kernel: x7 : 00000000ffffffff x6 : 0000000000000000
Oct 23 21:30:48 kernel: x5 : 000000000204fdc8 x4 : 00000000020481d8
Oct 23 21:30:48 kernel: x3 : 0000000002047db0 x2 : 00000000020481e8
Oct 23 21:30:48 kernel: x1 : 000000000000000a x0 : 0000000000000000
Oct 23 21:42:19 wlceventd: wlceventd_proc_event(662): wl1: Disassoc 92:BC:11:DA:44:24, status: 0, reason: Disassociated because sending station is leaving (or has left) BSS (8), rssi:0
Oct 23 21:42:19 wlceventd: wlceventd_proc_event(645): wl1: Deauth_ind 92:BC:11:DA:44:24, status: 0, reason: Deauthenticated because sending station is leaving (or has left) IBSS or ESS (3), rssi:0
Oct 23 21:56:54 wlceventd: wlceventd_proc_event(645): wl1: Deauth_ind 02:EF:B1:F5:40:BD, status: 0, reason: Group key update timeout (10), rssi:-64
Oct 23 21:56:54 wlceventd: wlceventd_proc_event(645): wl1: Deauth_ind 02:EF:B1:F5:40:BD, status: 0, reason: Unspecified reason (1), rssi:-63
Oct 23 21:56:54 wlceventd: wlceventd_proc_event(685): wl1: Auth 02:EF:B1:F5:40:BD, status: Successful (0), rssi:-63
Oct 23 21:56:54 wlceventd: wlceventd_proc_event(722): wl1: Assoc 02:EF:B1:F5:40:BD, status: Successful (0), rssi:-63
Oct 23 21:58:02 kernel: CPU: 1 PID: 2861 Comm: lighttpd Tainted: P O 4.19.275 #1
Oct 23 21:58:02 kernel: Hardware name: Broadcom-v8A (DT)
Oct 23 21:58:02 kernel: pstate: 600b0010 (nZCv q A32 LE aif)
Oct 23 21:58:02 kernel: pc : 00000000f6a5bc5c
Oct 23 21:58:02 kernel: lr : 00000000f6a5bc54
Oct 23 21:58:02 kernel: sp : 00000000ff82fe58
Oct 23 21:58:02 kernel: x12: 00000000f6a731dc
Oct 23 21:58:02 kernel: x11: 000000000104aed8 x10: 0000000000fd3190
Oct 23 21:58:02 kernel: x9 : 0000000000fecb30 x8 : 0000000000000041
Oct 23 21:58:02 kernel: x7 : 00000000ffffffff x6 : 0000000000000000
Oct 23 21:58:02 kernel: x5 : 000000000102d760 x4 : 0000000001119978
Oct 23 21:58:02 kernel: x3 : 0000000001119438 x2 : 0000000001119988
Oct 23 21:58:02 kernel: x1 : 000000000000000a x0 : 0000000000000000 
目前觀測下來，只要 ping Internet 的 response time 爆高，Log 都會噴這段異常
看起來應該是 lighthttpd 服務的問題
用 lighttpd asus router 作為關鍵字搜尋可以得到許多結果。
不少裝置應該都有收到關於 lighttpd 服務的相關修復，不清楚這個 kernel 異常是否與這個 stack buffer overflow 有關。且目前看起來 RT-BE88U 沒有相關的修復。
