Panic from wpa_supplicant in uma_large_free()

[David Wolfskill]

After updating HEAD to around r187816 (I'm still using CVS), I get the
following on my laptop (which makes an attempt to use wpa_supplicant):

<118>/dev/ad0s4e: FILE SYSTEM CLEAN; SKIPPING CHECKS
<118>/dev/ad0s4e: clean, 836915 free (2867 frags, 104256 blocks, 0.3% fragmentation)
wlan0: bpf attached
wlan0: Ethernet address: 00:05:3c:09:86:46
wlan0: bpf attached
<118>Starting wpa_supplicant.
<118>ioctl[SIOCG80211, op 98, len 32]: Bad address
<118>/etc/rc.d/wpa_supplicant: WARNING: failed to start wpa_supplicant
<118>Starting Network: lo0.
<118>ifconfig:
<118>create: bad value
<118>
<118>Starting wpa_supplicant.


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0xbfdb9858
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc0a507f5
stack pointer           = 0x28:0xc4b60a60
frame pointer           = 0x28:0xc4b60a70
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 863 (wpa_supplicant)

db> bt
Tracing pid 863 tid 100055 td 0xc520a480
uma_large_free(c5334e20,c0b14908,20,e,c5334dc0,...) at uma_large_free+0x35
free(c5334dc0,c0ca6660,c0,c5334dd0,c5334de0,...) at free+0xdb
ieee80211_ioctl_getdevcaps(c4b60ae8,c0805bbc,c4e75a9c,1,c4d20340,...) at ieee80211_ioctl_getdevcaps+0xda
ieee80211_ioctl_get80211(c0bca91c,c0bb5139,3,c520a480,c4b60b68,...) at ieee80211_ioctl_get80211+0x930
ieee80211_ioctl(c51a8c00,c01c69eb,c5334de0,c0e6b644,c51a8c00,...) at ieee80211_ioctl+0x2b7
in_control(c532b930,c01c69eb,c5334de0,c51a8c00,c520a480,...) at in_control+0xe0a
ifioctl(c532b930,c01c69eb,c5334de0,c520a480,c01c69eb,...) at ifioctl+0x322
soo_ioctl(c51fe700,c01c69eb,c5334de0,c4d3c900,c520a480,...) at soo_ioctl+0x397
kern_ioctl(c520a480,3,c01c69eb,c5334de0,184d9e0,...) at kern_ioctl+0x1dd
ioctl(c520a480,c4b60cf8,c,c0b8dabb,c0ca1db0,...) at ioctl+0x134
syscall(c4b60d38) at syscall+0x2a3
Xint0x80_syscall() at Xint0x80_syscall+0x20
--- syscall (54, FreeBSD ELF32, ioctl), eip = 0x28372c23, esp = 0xbfbfec9c, ebp = 0xbfbfece8 ---
db> 

My build machine -- which does not attempt to use wpa_supplicant
-- is using a copy of the same sources, did not show a problem, and
had no trouble with its (fxp) NIC:

freebeast(8.0-C)[1] uname -a
FreeBSD freebeast.catwhisker.org 8.0-CURRENT FreeBSD 8.0-CURRENT #240: Wed Jan 28 07:07:31 PST 2009     root at freebeast.catwhisker.org:/common/S4/obj/usr/src/sys/FREEBEAST  i386
freebeast(8.0-C)[2] netstat -nif inet
Name    Mtu Network       Address              Ipkts Ierrs    Opkts Oerrs  Coll
fxp0   1500 172.16.8.0/24 172.16.8.10            111     -       88     -     -
lo0   16384 127.0.0.0/8   127.0.0.1                4     -        4     -     -
freebeast(8.0-C)[3] 

And it shows that wpa_supplicant was rebuilt today:

freebeast(8.0-C)[3] ls -lT `which wpa_supplicant`
-r-xr-xr-x  1 root  wheel  272248 Jan 28 09:43:25 2009 /usr/sbin/wpa_supplicant
freebeast(8.0-C)[4] 

Since I used the same sources for each machine, and the same commands
to perform the source upgrade (from yesterday's HEAD), I believe
wpa_supplicant on the laptop was also updated today, per Sam's
message.

Peace,
david
-- 
David H. Wolfskill				david at catwhisker.org
Depriving a girl or boy of an opportunity for education is evil.

See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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