[Bug 240060] Fatal trap 12: page fault while in kernel mode, wpa_supplicant

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240060

--- Comment #7 from Martin Filla <freebsd at sysctl.cz> ---
Today again kernel panic with usb wifi
Unread portion of the kernel message buffer:
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 74093 (wpa_supplicant)
trap number             = 12
panic: page fault
cpuid = 1
time = 1569163448
KDB: stack backtrace:
#0 0xffffffff80be78d7 at kdb_backtrace+0x67
#1 0xffffffff80b9b4b3 at vpanic+0x1a3
#2 0xffffffff80b9b303 at panic+0x43
#3 0xffffffff81074bff at trap_fatal+0x35f
#4 0xffffffff81074c59 at trap_pfault+0x49
#5 0xffffffff8107427e at trap+0x29e
#6 0xffffffff8104f625 at calltrap+0x8
#7 0xffffffff80c9ab6a at ifhwioctl+0xd4a
#8 0xffffffff80c9c0ff at ifioctl+0x45f
#9 0xffffffff80c04e9d at kern_ioctl+0x26d
#10 0xffffffff80c04bbe at sys_ioctl+0x15e
#11 0xffffffff810756d9 at amd64_syscall+0x369
#12 0xffffffff8104ff0d at fast_syscall_common+0x101
Uptime: 3h42m4s
Dumping 852 out of 7943 MB:..2%..12%..21%..31%..42%..51%..61%..72%..81%..91%

bt__curthread () at ./machine/pcpu.h:234
234     ./machine/pcpu.h: No such file or directory.
(kgdb) bt
#0  __curthread () at ./machine/pcpu.h:234
#1  doadump (textdump=<optimized out>) at /usr/src/sys/kern/kern_shutdown.c:366
#2  0xffffffff80b9b09b in kern_reboot (howto=260) at
/usr/src/sys/kern/kern_shutdown.c:446
#3  0xffffffff80b9b513 in vpanic (fmt=<optimized out>, ap=0xfffffe005f7fd500)
at /usr/src/sys/kern/kern_shutdown.c:872
#4  0xffffffff80b9b303 in panic (fmt=<unavailable>) at
/usr/src/sys/kern/kern_shutdown.c:799
#5  0xffffffff81074bff in trap_fatal (frame=0xfffffe005f7fd6f0, eva=0) at
/usr/src/sys/amd64/amd64/trap.c:929
#6  0xffffffff81074c59 in trap_pfault (frame=0xfffffe005f7fd6f0, usermode=0) at
/usr/src/sys/amd64/amd64/trap.c:765
#7  0xffffffff8107427e in trap (frame=0xfffffe005f7fd6f0) at
/usr/src/sys/amd64/amd64/trap.c:441
#8  <signal handler called>
#9  0xffffffff80ce4a9b in ieee80211_ioctl (ifp=0xfffff80151136800,
cmd=<optimized out>, data=<optimized out>) at
/usr/src/sys/net80211/ieee80211_ioctl.c:3543
#10 0xffffffff80c9ab6a in ifhwioctl (cmd=<optimized out>, ifp=<optimized out>,
data=0xfffffe005f7fda10 "wlan0", td=<optimized out>) at
/usr/src/sys/net/if.c:2704
#11 0xffffffff80c9c0ff in ifioctl (so=0xfffff801ea7106d0, cmd=2149607696,
data=<optimized out>, td=0xfffff801aec3a000) at /usr/src/sys/net/if.c:3124
#12 0xffffffff80c04e9d in fo_ioctl (fp=<optimized out>, com=<optimized out>,
active_cred=0x1, td=<optimized out>, data=<optimized out>) at
/usr/src/sys/sys/file.h:330
#13 kern_ioctl (td=0xfffff801aec3a000, fd=4, com=2149607696, data=0x0) at
/usr/src/sys/kern/sys_generic.c:800
#14 0xffffffff80c04bbe in sys_ioctl (td=0xfffff801aec3a000,
uap=0xfffff801aec3a3c0) at /usr/src/sys/kern/sys_generic.c:712
#15 0xffffffff810756d9 in syscallenter (td=<optimized out>) at
/usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:135
#16 amd64_syscall (td=0xfffff801aec3a000, traced=0) at
/usr/src/sys/amd64/amd64/trap.c:1076
#17 <signal handler called>
#18 0x00000008008d911a in ?? ()

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