[Bug 208632] 11.0-CURRENT crashes after removing TP-LINK TL-WN725N USB Wi-Fi adapter (urtwn)

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208632

bsd at haps.ca changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bsd at haps.ca

--- Comment #4 from bsd at haps.ca ---
Should this be re-filed under FreeBSD Wireless?

I have the same issue with a vilros stick.  Occasionally the light goes out and
I lose connectivity (probably due to the fact that it's a crappy nano-sized
unit and there's loads of interference).  Pulling it out will cause a kernel
panic 8/10 times.

I'm running this on a thinkpad T440p, the wireless usb info is:
ugen0.2: <product 0x8176 vendor 0x0bda> at usbus0, cfg=0 md=HOST spd=HIGH
(480Mbps) pwr=ON (500mA)

(I can provide the full dump, but it looks like all the other dumps for that
product id.)

I'm running (from uname -a): 11.0-CURRENT FreeBSD 11.0-CURRENT #3 r300249
Kernel is GENERIC.

Please let me know if more details are required, I've gone ahead and attached
the crash info, the (what I think is) pertinent section of dmesg is:

=====================
urtwn0: <vendor 0x0bda product 0x8176, class 0/0, rev 2.00/2.00, addr 9> on
usbus0
urtwn0: MAC/BB RTL8188CUS, RF 6052 1T1R
urtwn0: enabling 11n
wlan0: Ethernet address: 00:13:ef:50:02:e4
ugen0.3: <vendor 0x0bda> at usbus0 (disconnected)
urtwn0: at uhub0, port 6, addr 9 (disconnected)


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x0
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff80b6d145
stack pointer           = 0x28:0xfffffe0454a136d0
frame pointer           = 0x28:0xfffffe0454a137d0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 5463 (wpa_supplicant)
trap number             = 12
panic: page fault
cpuid = 0
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0454a13260
vpanic() at vpanic+0x182/frame 0xfffffe0454a132e0
panic() at panic+0x43/frame 0xfffffe0454a13340
trap_fatal() at trap_fatal+0x351/frame 0xfffffe0454a133a0
trap_pfault() at trap_pfault+0x1fd/frame 0xfffffe0454a13400
trap() at trap+0x284/frame 0xfffffe0454a13610
calltrap() at calltrap+0x8/frame 0xfffffe0454a13610
--- trap 0xc, rip = 0xffffffff80b6d145, rsp = 0xfffffe0454a136e0, rbp =
0xfffffe0454a137d0 ---
ieee80211_ioctl() at ieee80211_ioctl+0x515/frame 0xfffffe0454a137d0
ifioctl() at ifioctl+0x10ea/frame 0xfffffe0454a13860
kern_ioctl() at kern_ioctl+0x246/frame 0xfffffe0454a138c0
sys_ioctl() at sys_ioctl+0x171/frame 0xfffffe0454a139a0
amd64_syscall() at amd64_syscall+0x2db/frame 0xfffffe0454a13ab0
Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe0454a13ab0
--- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x8015c29da, rsp =
0x7fffffffe928, rbp = 0x7fffffffe980 ---
Uptime: 1d8h37m35s
Dumping 1529 out of 16040
MB:..2%..11%..21%..31%..41%..51%..61%..71%..81%..92%Copyright (c) 1992-2016 The
FreeBSD Project.
=======================
etc.

Please let me know if further details are needed.
Bug 208605 is marked fixed, but it looks to be the same issue.

Thanks!

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