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kern/46462: Hang trying to run a disklabel on an inserted USB flash drive
>Number: 46462
>Category: kern
>Synopsis: Hang trying to run a disklabel on an inserted USB flash drive
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Thu May 17 22:35:00 +0000 2012
>Originator: Erik Berls
>Release:
>Organization:
NetBSD
>Environment:
amd64
>Description:
Plugging in a usb memory stick got me a hung proc.
These details are for rmind@
db> tr/t 0t3707
trace: pid 3707 lid 1 at 0xffffa00048ebc860
sleepq_block() at netbsd:sleepq_block+0xdd
turnstile_block() at netbsd:turnstile_block+0x2a3
mutex_vector_enter() at netbsd:mutex_vector_enter+0xf7
sdopen() at netbsd:sdopen+0x99
spec_open() at netbsd:spec_open+0x15e
VOP_OPEN() at netbsd:VOP_OPEN+0x29
vn_open() at netbsd:vn_open+0x13d
sys_open() at netbsd:sys_open+0xeb
syscall() at netbsd:syscall+0xb4
db>
db> ps/l
PID LID S CPU FLAGS STRUCT LWP * NAME WAIT
23700 1 3 0 84 ffffa00048245bc0 pickup kqueue
4394 1 3 0 84 ffffa00049fe9be0 csh ttyraw
3707 1 3 0 1000004 ffffa00048e1f7e0 disklabel tstile
3516 1 3 0 84 ffffa00048e0b7c0 tcsh pause
2981 1 3 0 84 ffffa00048e0b3e0 sshd select
3229 1 3 0 84 ffffa00048e0bba0 sshd netio
3222 1 3 0 84 ffffa00048f8dbc0 mountd select
1015 5 3 0 84 ffffa000488d5420 slave nfsd
4 3 0 84 ffffa000488d5be0 slave nfsd
3 3 0 84 ffffa00048e1f020 slave nfsd
2 3 0 84 ffffa00048e1fbc0 slave nfsd
1 3 0 84 ffffa000488d5800 master select
740 1 3 0 84 ffffa00048ccd000 ssh-agent select
639 1 3 0 84 ffffa00048982000 qmgr kqueue
558 1 3 0 84 ffffa00048192000 login wait
630 1 3 0 84 ffffa00048a14be0 cron nanoslp
618 1 3 0 80 ffffa00048a02400 inetd kqueue
601 1 3 0 84 ffffa00048a02bc0 master kqueue
372 1 3 0 84 ffffa000489827c0 sshd select
373 18 3 0 84 ffffa00048c76420 java parked
17 3 0 80 ffffa00048c76800 java select
16 3 0 84 ffffa00048c76be0 java parked
15 3 0 80 ffffa00048c0c020 java select
14 3 0 84 ffffa00048c0c400 java parked
13 5 0 4 ffffa00048c0c7e0 java
11 3 0 84 ffffa00048b3b000 java parked
10 3 0 84 ffffa00048b3b3e0 java parked
9 3 0 80 ffffa00048b3b7c0 java parked
8 3 0 84 ffffa00048b3bba0 java parked
7 3 0 84 ffffa00048a14040 java parked
6 3 0 80 ffffa00048a14420 java parked
5 3 0 80 ffffa00048a14800 java parked
4 3 0 80 ffffa00048332be0 java parked
3 3 0 84 ffffa00048a02020 java parked
2 3 0 80 ffffa00048a027e0 java select
1 3 0 80 ffffa000489823e0 java parked
297 1 3 0 84 ffffa00048982ba0 mdnsd select
303 1 3 0 84 ffffa00048912040 mDNSResponderPos select
275 2 3 0 84 ffffa00048895ba0 xenbackendd netio
1 3 0 84 ffffa00048332800 xenbackendd parked
262 2 3 0 84 ffffa00048895000 xenconsoled netio
1 3 0 84 ffffa0004890cbc0 xenconsoled select
254 63 5 0 4 ffffa00049bd7400 python2.6
7 3 0 84 ffffa00048912420 python2.6 select
6 3 0 80 ffffa00048912800 python2.6 select
5 3 0 84 ffffa00048912be0 python2.6 netio
4 3 0 84 ffffa0004890c020 python2.6 parked
3 3 0 84 ffffa0004890c400 python2.6 select
2 3 0 80 ffffa0004890c7e0 python2.6 socket
1 3 0 80 ffffa000488953e0 python2.6 select
251 1 3 0 80 ffffa000488957c0 python2.6 wait
235 1 3 0 84 ffffa00048332420 xenstored select
163 1 3 0 84 ffffa000482457e0 rpcbind select
76 1 2 0 4 ffffa00048245400 syslogd
1 1 3 0 84 ffffa0004545f7e0 init wait
0 59 3 0 204 ffffa00049c5b000 scsibus0 biowait
57 5 0 204 ffffa0004544f040 (zombie)
49 3 0 204 ffffa00048245020 physiod physiod
48 3 0 204 ffffa000481923e0 aiodoned aiodoned
47 3 0 204 ffffa000481927c0 ioflush syncer
46 3 0 204 ffffa00048192ba0 pgdaemon pgdaemon
45 3 0 204 ffffa00048188040 xbdbackd xbdbackd
44 3 0 204 ffffa00048188420 cryptoret
crypto_wait
43 3 0 204 ffffa0004545b7e0 ipmi0 ipmi0
42 3 0 204 ffffa0004545b020 ipmi ipmi_poll
40 3 0 204 ffffa0004545eba0 usb7 usbevt
39 3 0 204 ffffa0004545d040 usb6 usbevt
38 3 0 204 ffffa0004545d420 usb5 usbevt
37 3 0 204 ffffa0004545b400 usb4 usbevt
36 3 0 204 ffffa0004545d800 usb0 usbevt
35 3 0 204 ffffa0004545dbe0 usb3 usbevt
34 3 0 204 ffffa00048188800 usb2 usbevt
33 3 0 204 ffffa00048188be0 usbtask-dr usbtsk
32 3 0 204 ffffa0004545f020 usbtask-hc usbtsk
31 3 0 204 ffffa0004545f400 usb1 usbevt
30 3 0 204 ffffa0004545fbc0 unpgc unpgc
29 3 0 204 ffffa0004545e000 vmem_rehash
vmem_rehash
28 3 0 204 ffffa0004545e3e0 xenbus rdst
27 3 0 204 ffffa0004545e7c0 xenwatch evtsq
18 3 0 204 ffffa0004545bbc0 atabus3 atath
17 3 0 204 ffffa00045459000 atabus2 atath
16 3 0 204 ffffa000454593e0 atabus1 atath
15 3 0 204 ffffa000454597c0 atabus0 atath
14 3 0 284 ffffa00045459ba0 fw0_probe -
12 3 0 204 ffffa0004544f420 sysmon smtaskq
11 3 0 204 ffffa0004544f800 pmfevent pmfevent
10 3 0 204 ffffa0004544fbe0 nfssilly nfssilly
9 3 0 204 ffffa0004544c020 cachegc cachegc
8 3 0 204 ffffa0004544c400 vrele vrele
7 3 0 204 ffffa0004544c7e0 xcall/0 xcall
6 1 0 204 ffffa0004544cbc0 softser/0
5 1 0 204 ffffa0004544a000 softclk/0
4 1 0 204 ffffa0004544a3e0 softbio/0
3 1 0 204 ffffa0004544a7c0 softnet/0
> 2 7 0 205 ffffa0004544aba0 idle/0
1 3 0 204 ffffffff80b5a220 swapper schedule
db>
db> tr/t 0.59
trace: pid 0 lid 59 at 0xffffa00049c1b770
sleepq_block() at netbsd:sleepq_block+0xdd
cv_wait() at netbsd:cv_wait+0xf1
biowait() at netbsd:biowait+0x4f
read_sector() at netbsd:read_sector+0x23
scan_mbr() at netbsd:scan_mbr+0x40
readdisklabel() at netbsd:readdisklabel+0xfb
sdopen() at netbsd:sdopen+0x26a
spec_open() at netbsd:spec_open+0x29a
VOP_OPEN() at netbsd:VOP_OPEN+0x29
dkwedge_discover() at netbsd:dkwedge_discover+0xee
sdattach() at netbsd:sdattach+0x206
config_attach_loc() at netbsd:config_attach_loc+0x15a
scsi_probe_bus() at netbsd:scsi_probe_bus+0x4aa
scsibus_config() at netbsd:scsibus_config+0x5d
scsipi_completion_thread() at netbsd:scsipi_completion_thread+0x23
>How-To-Repeat:
>Fix:
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