UBSan: Undefined Behavior in config_detach_commit

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syzbot

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Aug 13, 2022, 6:57:21 PM8/13/22

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Hello,

syzbot found the following issue on:

HEAD commit: 030a646f9a17 Fix an inverted KASSERTMSG test from the #ifd..
git tree: netbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1109627b080000
kernel config: https://syzkaller.appspot.com/x/.config?x=1420f906d33d9f1f
dashboard link: https://syzkaller.appspot.com/bug?extid=d2df39bb3f72975c0a97
compiler: g++ (Debian 10.2.1-6) 10.2.1 20210110
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11d26b35080000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d2df39...@syzkaller.appspotmail.com

[ 213.2232134] panic: UBSan: Undefined Behavior in /syzkaller/managers/ci2-netbsd-kubsan/kernel/sys/kern/subr_autoconf.c:2185:2, member access within null pointer of type 'struct lwp'

[ 213.2401385] cpu0: Begin traceback...
[ 213.2618452] vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
[ 213.3318468] Report() at netbsd:Report+0x3b sys/../common/lib/libc/misc/ubsan.c:1352
[ 213.3918449] HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x1fb sys/../common/lib/libc/misc/ubsan.c:429
[ 213.4418429] config_detach_commit() at netbsd:config_detach_commit+0x242 sys/kern/subr_autoconf.c:2185
[ 213.5018455] cdev_detached() at netbsd:cdev_detached+0x15d sys/kern/subr_devsw.c:1384
[ 213.5518481] vdevgone() at netbsd:vdevgone+0x125 sys/kern/vfs_subr.c:524
[ 213.6018482] audiodetach() at netbsd:audiodetach+0xb8 sys/dev/audio/audio.c:1370
[ 213.6518459] config_detach() at netbsd:config_detach+0x497 sys/kern/subr_autoconf.c:2045
[ 213.7018446] config_detach_children() at netbsd:config_detach_children+0x83 sys/kern/subr_autoconf.c:2206
[ 213.7618476] pad_detach() at netbsd:pad_detach+0x87 sys/dev/pad/pad.c:251
[ 213.8118446] config_detach() at netbsd:config_detach+0x497 sys/kern/subr_autoconf.c:2045
[ 213.8618440] fops_pad_close() at netbsd:fops_pad_close+0xb7 pad_close sys/dev/pad/pad.c:423 [inline]
[ 213.8618440] fops_pad_close() at netbsd:fops_pad_close+0xb7 sys/dev/pad/pad.c:433
[ 213.9218454] closef() at netbsd:closef+0x1cd sys/kern/kern_descrip.c:832
[ 213.9718456] fd_free() at netbsd:fd_free+0x4dc sys/kern/kern_descrip.c:1571
[ 214.0218450] exit1() at netbsd:exit1+0x3a7 sys/kern/kern_exit.c:301
[ 214.0718435] sys_exit() at netbsd:sys_exit+0xd4 sys/kern/kern_exit.c:180
[ 214.1218454] syscall() at netbsd:syscall+0x2da sy_call sys/sys/syscallvar.h:65 [inline]
[ 214.1218454] syscall() at netbsd:syscall+0x2da sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 214.1218454] syscall() at netbsd:syscall+0x2da sys/arch/x86/x86/syscall.c:138
[ 214.1318440] --- syscall (number 1) ---
[ 214.1518464] netbsd:syscall+0x2da:
[ 214.1518464] cpu0: End traceback...
[ 214.1636964] fatal breakpoint trap in supervisor mode
[ 214.1636964] trap type 1 code 0 rip 0xffffffff80221ab5 cs 0x8 rflags 0x246 cr2 0x7d4950294000 ilevel 0 rsp 0xffff9182484194e0
[ 214.1798064] curlwp 0xffffd19c55c17640 pid 12089.12089 lowest kstack 0xffff9182484152c0
Stopped in pid 12089.12089 (syz-executor.1) at netbsd:breakpoint+0x5: leave
?
breakpoint() at netbsd:breakpoint+0x5
db_panic() at netbsd:db_panic+0xec sys/ddb/db_panic.c:69
vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
Report() at netbsd:Report+0x3b sys/../common/lib/libc/misc/ubsan.c:1352
HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x1fb sys/../common/lib/libc/misc/ubsan.c:429
config_detach_commit() at netbsd:config_detach_commit+0x242 sys/kern/subr_autoconf.c:2185
cdev_detached() at netbsd:cdev_detached+0x15d sys/kern/subr_devsw.c:1384
vdevgone() at netbsd:vdevgone+0x125 sys/kern/vfs_subr.c:524
audiodetach() at netbsd:audiodetach+0xb8 sys/dev/audio/audio.c:1370
config_detach() at netbsd:config_detach+0x497 sys/kern/subr_autoconf.c:2045
config_detach_children() at netbsd:config_detach_children+0x83 sys/kern/subr_autoconf.c:2206
pad_detach() at netbsd:pad_detach+0x87 sys/dev/pad/pad.c:251
config_detach() at netbsd:config_detach+0x497 sys/kern/subr_autoconf.c:2045
fops_pad_close() at netbsd:fops_pad_close+0xb7 pad_close sys/dev/pad/pad.c:423 [inline]
fops_pad_close() at netbsd:fops_pad_close+0xb7 sys/dev/pad/pad.c:433
closef() at netbsd:closef+0x1cd sys/kern/kern_descrip.c:832
fd_free() at netbsd:fd_free+0x4dc sys/kern/kern_descrip.c:1571
exit1() at netbsd:exit1+0x3a7 sys/kern/kern_exit.c:301
sys_exit() at netbsd:sys_exit+0xd4 sys/kern/kern_exit.c:180
syscall() at netbsd:syscall+0x2da sy_call sys/sys/syscallvar.h:65 [inline]
syscall() at netbsd:syscall+0x2da sy_invoke sys/sys/syscallvar.h:94 [inline]
syscall() at netbsd:syscall+0x2da sys/arch/x86/x86/syscall.c:138
--- syscall (number 1) ---
netbsd:syscall+0x2da:
Panic string: UBSan: Undefined Behavior in /syzkaller/managers/ci2-netbsd-kubsan/kernel/sys/kern/subr_autoconf.c:2185:2, member access within null pointer of type 'struct lwp'

PID LID S CPU FLAGS STRUCT LWP * NAME WAIT
1943 1947 3 1 180 ffffd19c56e805c0 syz-executor.5 parked
1943 12083 3 0 180 ffffd19c569002c0 syz-executor.5 parked
1943 12446 2 0 100 ffffd19c55b8e680 syz-executor.5
1943 1943 2 1 10000000 ffffd19c55c5b140 syz-executor.5
12089>12089 7 0 10040000 ffffd19c55c17640 syz-executor.1
1941 12207 3 1 180 ffffd19c55c8d1c0 syz-executor.3 parked
1941 2884 3 1 180 ffffd19c55c5b580 syz-executor.3 parked
1941 1941 2 1 10040000 ffffd19c558444c0 syz-executor.3
1237 1237 2 0 140 ffffd19c55824600 syz-executor.5
1235 >1235 7 1 40 ffffd19c538b70c0 syz-executor.2
1077 1077 2 0 140 ffffd19c549c2a00 syz-executor.1
1076 1076 3 1 40 ffffd19c5364c4c0 syz-executor.0 biowait
1151 1151 3 0 40 ffffd19c513dfa40 syz-executor.4 biowait
1000 1000 2 0 140 ffffd19c54055980 syz-executor.3
1103 1490 3 0 180 ffffd19c5592d280 syz-execprog parked
1103 323 3 1 180 ffffd19c533d5780 syz-execprog kqueue
1103 1186 3 0 180 ffffd19c538798c0 syz-execprog parked
1103 1236 3 0 180 ffffd19c5364c900 syz-execprog parked
1103 982 3 0 180 ffffd19c53879040 syz-execprog wait
1103 1129 3 0 180 ffffd19c52cc9b40 syz-execprog wait
1103 951 3 0 180 ffffd19c52cc92c0 syz-execprog wait
1103 1222 3 0 180 ffffd19c549c25c0 syz-execprog wait
1103 425 3 1 180 ffffd19c52a60280 syz-execprog parked
1103 1224 3 0 180 ffffd19c54055100 syz-execprog parked
1103 1080 3 1 180 ffffd19c52649240 syz-execprog wait
1103 843 3 1 1c0 ffffd19c52649ac0 syz-execprog wait
1103 1220 2 0 140 ffffd19c52649680 syz-execprog
1103 1103 3 0 180 ffffd19c549c2180 syz-execprog parked
1194 1194 3 1 180 ffffd19c538b7940 sshd select
1074 1074 3 0 180 ffffd19c54055540 getty nanoslp
941 941 3 0 180 ffffd19c53ee09c0 getty nanoslp
1259 1259 3 0 180 ffffd19c53ee0580 getty nanoslp
1258 1258 3 1 1c0 ffffd19c538b7500 getty ttyraw
1093 1093 3 1 180 ffffd19c53ee0140 sshd select
942 942 3 0 180 ffffd19c533d5bc0 powerd kqueue
688 688 3 1 180 ffffd19c53001b80 syslogd kqueue
600 600 3 1 180 ffffd19c533d5340 dhcpcd poll
602 602 3 1 180 ffffd19c52cc9700 dhcpcd poll
547 547 3 1 180 ffffd19c5364c080 dhcpcd poll
588 588 3 1 180 ffffd19c52a606c0 dhcpcd poll
289 289 3 0 180 ffffd19c53001740 dhcpcd poll
288 288 3 1 180 ffffd19c53001300 dhcpcd poll
351 351 3 1 180 ffffd19c52a60b00 dhcpcd poll
1 1 3 0 180 ffffd19c4a253540 init wait
0 967 3 0 200 ffffd19c52487200 physiod physiod
0 194 2 0 240 ffffd19c52487a80 ioflush
0 193 3 0 200 ffffd19c4a1da300 pooldrain pooldrain
0 192 3 1 200 ffffd19c52487640 pgdaemon pgdaemon
0 167 3 1 200 ffffd19c513df600 usb7 usbevt
0 166 3 0 200 ffffd19c513df1c0 usb6 usbevt
0 165 3 1 200 ffffd19c4e37aa00 usb5 usbevt
0 164 3 1 200 ffffd19c4e37a5c0 usb4 usbevt
0 31 3 1 200 ffffd19c4e37a180 usb3 usbevt
0 63 3 0 200 ffffd19c4b2ed9c0 usb2 usbevt
0 126 3 1 200 ffffd19c4b2ed580 usb1 usbevt
0 125 3 1 200 ffffd19c4b2ed140 usb0 usbevt
0 124 3 1 200 ffffd19c4a1da740 usbtask-dr usbtsk
0 123 3 1 200 ffffd19c49b426c0 usbtask-hc usbtsk
0 122 2 0 240 ffffd19c4a253980 npfgc0
0 121 3 1 200 ffffd19c4a253100 rt_free rt_free
0 120 3 1 200 ffffd19c4a24e940 unpgc unpgc
0 119 2 1 200 ffffd19c4a24e500 key_timehandler
0 118 3 1 200 ffffd19c4a24e0c0 icmp6_wqinput/1 icmp6_wqinput
0 117 3 0 200 ffffd19c4a229900 icmp6_wqinput/0 icmp6_wqinput
0 116 2 1 200 ffffd19c4a2294c0 nd6_timer
0 115 3 1 200 ffffd19c4a229080 carp6_wqinput/1 carp6_wqinput
0 114 3 0 200 ffffd19c4a21c8c0 carp6_wqinput/0 carp6_wqinput
0 113 3 1 200 ffffd19c4a21c480 carp_wqinput/1 carp_wqinput
0 112 3 0 200 ffffd19c4a21c040 carp_wqinput/0 carp_wqinput
0 111 3 1 200 ffffd19c4a1e7bc0 icmp_wqinput/1 icmp_wqinput
0 110 3 0 200 ffffd19c4a1e7780 icmp_wqinput/0 icmp_wqinput
0 109 2 1 200 ffffd19c4a1dab80 rt_timer
0 108 3 0 200 ffffd19c4a1e7340 vmem_rehash vmem_rehash
0 99 3 0 200 ffffd19c49b47b40 entbutler entropy
0 98 2 0 240 ffffd19c49b47700 viomb
0 97 3 1 200 ffffd19c49b472c0 vioif0_txrx/1 vioif0_txrx
0 96 3 0 200 ffffd19c49b42b00 vioif0_txrx/0 vioif0_txrx
0 29 3 1 200 ffffd19c49b42280 scsibus0 sccomp
0 28 3 0 200 ffffd19c485cbac0 pms0 pmsreset
0 27 3 1 200 ffffd19c485cb680 xcall/1 xcall
0 26 1 1 200 ffffd19c485cb240 softser/1
0 25 1 1 200 ffffd19c4858ea80 softclk/1
0 24 1 1 200 ffffd19c4858e640 softbio/1
0 23 1 1 200 ffffd19c4858e200 softnet/1
0 22 1 1 201 ffffd19d7692da40 idle/1
0 21 3 1 200 ffffd19d7692d600 lnxsyswq lnxsyswq
0 20 3 1 200 ffffd19d7692d1c0 lnxubdwq lnxubdwq
0 19 3 0 200 ffffd19d76934a00 lnxpwrwq lnxpwrwq
0 18 3 1 200 ffffd19d769345c0 lnxlngwq lnxlngwq
0 17 3 1 200 ffffd19d76934180 lnxhipwq lnxhipwq
0 16 3 1 200 ffffd19d769539c0 lnxrcugc lnxrcugc
0 15 3 0 200 ffffd19d76953580 sysmon smtaskq
0 14 3 1 200 ffffd19d76953140 pmfsuspend pmfsuspend
0 13 3 0 200 ffffd19d7695e980 pmfevent pmfevent
0 12 3 1 200 ffffd19d7695e540 sopendfree sopendfr
0 11 3 0 200 ffffd19d7695e100 iflnkst iflnkst
0 10 3 1 200 ffffd19d77995940 nfssilly nfssilly
0 9 3 0 200 ffffd19d77995500 vdrain vdrain
0 8 3 1 200 ffffd19d779950c0 modunload mod_unld
0 7 3 0 200 ffffd19d779ba900 xcall/0 xcall
0 6 1 0 200 ffffd19d779ba4c0 softser/0
0 5 1 0 200 ffffd19d779ba080 softclk/0
0 4 1 0 200 ffffd19d779eb8c0 softbio/0
0 3 1 0 200 ffffd19d779eb480 softnet/0
0 2 1 0 201 ffffd19d779eb040 idle/0
0 0 2 0 240 ffffffff86741940 swapper
[Locks tracked through LWPs]

****** LWP 12089.12089 (syz-executor.1) @ 0xffffd19c55c17640, l_stat=7

*** Locks held:

* Lock 0 (initialized at fork1)
lock address : 0xffffd19c55b72390 type : sleep/adaptive
initialized : 0xffffffff836c9d93
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffd19c55c17640 last held: 0xffffd19c55c17640
last locked* : 0xffffffff836c212d unlocked : 000000000000000000
owner/count : 0xffffd19c55c17640 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

* Lock 1 (initialized at config_init)
lock address : 0xffffffff86ca9b90 type : sleep/adaptive
initialized : 0xffffffff837cf1da
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffd19c55c17640 last held: 0xffffd19c55c17640
last locked* : 0xffffffff837d4380 unlocked : 0xffffffff837d4b04
owner field : 0xffffd19c55c17640 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 1235.1235 (syz-executor.2) @ 0xffffd19c538b70c0, l_stat=7

*** Locks held:

* Lock 0 (initialized at vcache_alloc)
lock address : 0xffffd19c56071500 type : sleep/adaptive
initialized : 0xffffffff839e89c1
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffffd19c538b70c0 last held: 0xffffd19c538b70c0
last locked* : 0xffffffff83a49230 unlocked : 0xffffffff83a493b4
owner/count : 0xffffd19c538b70c0 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

* Lock 1 (initialized at vcache_alloc)
lock address : 0xffffd19c55c3b2c0 type : sleep/adaptive
initialized : 0xffffffff839e89c1
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffffd19c538b70c0 last held: 0xffffd19c538b70c0
last locked* : 0xffffffff83a49230 unlocked : 0xffffffff83a493b4
owner/count : 0xffffd19c538b70c0 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 1076.1076 (syz-executor.0) @ 0xffffd19c5364c4c0, l_stat=3

*** Locks held:

* Lock 0 (initialized at vcache_alloc)
lock address : 0xffffd19c557de700 type : sleep/adaptive
initialized : 0xffffffff839e89c1
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffffd19c5364c4c0 last held: 0xffffd19c5364c4c0
last locked* : 0xffffffff83a49230 unlocked : 0xffffffff83a493b4
owner/count : 0xffffd19c5364c4c0 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

* Lock 1 (initialized at vcache_alloc)
lock address : 0xffffd19c53d0a980 type : sleep/adaptive
initialized : 0xffffffff839e89c1
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffffd19c5364c4c0 last held: 0xffffd19c5364c4c0
last locked* : 0xffffffff83a49230 unlocked : 0xffffffff83a493b4
owner/count : 0xffffd19c5364c4c0 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

* Lock 2 (initialized at genfs_node_init)
lock address : 0xffffd19c558b3ec0 type : sleep/adaptive
initialized : 0xffffffff83a496a3
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffffd19c5364c4c0 last held: 0xffffd19c5364c4c0
last locked* : 0xffffffff833bf6e0 unlocked : 000000000000000000
owner/count : 0xffffd19c5364c4c0 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 1151.1151 (syz-executor.4) @ 0xffffd19c513dfa40, l_stat=3

*** Locks held:

* Lock 0 (initialized at vcache_alloc)
lock address : 0xffffd19c558749c0 type : sleep/adaptive
initialized : 0xffffffff839e89c1
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffd19c513dfa40 last held: 0xffffd19c513dfa40
last locked* : 0xffffffff83a49230 unlocked : 0xffffffff83a493b4
owner/count : 0xffffd19c513dfa40 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

* Lock 1 (initialized at vcache_alloc)
lock address : 0xffffd19c53df3980 type : sleep/adaptive
initialized : 0xffffffff839e89c1
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffd19c513dfa40 last held: 0xffffd19c513dfa40
last locked* : 0xffffffff83a49230 unlocked : 0xffffffff83a493b4
owner/count : 0xffffd19c513dfa40 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 602.602 (dhcpcd) @ 0xffffd19c52cc9700, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff86bd7a80 type : sleep/adaptive
initialized : 0xffffffff83706cc7
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 0
relevant lwp : 0xffffd19c52cc9700 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 547.547 (dhcpcd) @ 0xffffd19c5364c080, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff86bd7a80 type : sleep/adaptive
initialized : 0xffffffff83706cc7
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 0
relevant lwp : 0xffffd19c5364c080 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 288.288 (dhcpcd) @ 0xffffd19c53001300, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff86bd7a80 type : sleep/adaptive
initialized : 0xffffffff83706cc7
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 0
relevant lwp : 0xffffd19c53001300 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 351.351 (dhcpcd) @ 0xffffd19c52a60b00, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff86bd7a80 type : sleep/adaptive
initialized : 0xffffffff83706cc7
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 0
relevant lwp : 0xffffd19c52a60b00 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 0.11 (iflnkst) @ 0xffffd19d7695e100, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff86bd7a80 type : sleep/adaptive
initialized : 0xffffffff83706cc7
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffd19d7695e100 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 0.5 (softclk/0) @ 0xffffd19d779ba080, l_stat=1

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff86bd7a80 type : sleep/adaptive
initialized : 0xffffffff83706cc7
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffd19d779ba080 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 0.0 (swapper) @ 0xffffffff86741940, l_stat=2

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff86bd7a80 type : sleep/adaptive
initialized : 0xffffffff83706cc7
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffffff86741940 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

[Locks tracked through CPUs]

******* Locks held on cpu0:

* Lock 0 (initialized at main)
lock address : 0xffffffff86bd7980 type : spin
initialized : 0xffffffff83ff4956
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffd19c55c17640 last held: 0xffffd19c55c17640
last locked* : 0xffffffff837702de unlocked : 0xffffffff83674542
curcpu holds : 3 wanted by: 000000000000000000

* Lock 1 (initialized at kprintf_init)
lock address : 0xffffffff86cbb6e8 type : spin
initialized : 0xffffffff838516b3
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffd19c55c17640 last held: 0xffffd19c55c17640
last locked* : 0xffffffff83851741 unlocked : 0xffffffff838517bc
owner field : 0x0000000000000800 wait/spin: 0/1

PAGE FLAG PQ UOBJECT UANON
0xffff918000007180 0045 00000000 0x0 0x0
0xffff918000007200 0045 00000000 0x0 0x0
0xffff918000007280 0045 00000000 0x0 0x0
0xffff918000007300 0045 00000000 0x0 0x0
0xffff918000007380 0045 00000000 0x0 0x0
0xffff918000007400 0045 00000000 0x0 0x0
0xffff918000007480 0045 00000000 0x0 0x0
0xffff918000007500 0045 00000000 0x0 0x0
0xffff918000007580 0045 00000000 0x0 0x0
0xffff918000007600 0045 00000000 0x0 0x0
0xffff918000007680 0045 00000000 0x0 0x0
0xffff918000007700 0041 00000000 0x0 0x0
0xffff918000007780 0041 00000000 0x0 0x0
0xffff918000007800 0041 00000000 0x0 0x0
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0xffff918000015800 0041 00000000 0x0 0x0
0xffff918000015880 0041 00000000 0x0 0x0
0xffff918000015900 0001 00000000 0x0 0x0
0xffff918000015980 0001 00000000 0x0 0x0
0xffff918000015a00 0001 00000000 0x0 0x0
0xffff918000015a80 0001 00000000 0x0 0x0
0xffff918000015b00 0001 00000000 0x0 0x0
0xffff918000015b80 0001 00000000 0x0 0x0
0xffff918000015c00 0001 00000000 0x0 0x0
0xffff918000015c80 0001 00000000 0x0 0x0
0xffff918000015d00 0001 00000000 0x0 0x0
0xffff918000015d80 0001 00000000 0x0 0x0
0xffff918000015e00 0001 00000000 0x0 0x0
0xffff918000015e80 0001 00000000 0x0 0x0
0xffff918000015f00 0001 00000000 0x0 0x0
0xffff918000015f80 0001 00000000 0x0 0x0
0xffff918000016000 0001 00000000 0x0 0x0
0xffff918000016080 0001 00000000 0x0 0x0
0xffff918000016100 0001 00000000 0x0 0x0
0xffff918000016180 0001 00000000 0x0 0x0
0xffff918000016200 0001 00000000 0x0 0x0
0xffff918000016280 0001 00000000 0x0 0x0
0xffff918000016300 0001 00000000 0x0 0x0
0xffff918000016380 0001 00000000 0x0 0x0
0xffff918000016400 0001 00000000 0x0 0x0
0xffff918000016480 0001 00000000 0x0 0x0
0xffff918000016500 0001 00000000 0x0 0x0
0xffff918000016580 0001 00000000 0x0 0x0
0xffff918000016600 0001 00000000 0x0 0x0
0xffff918000016680 0001 00000000 0x0 0x0
0xffff918000016700 0001 00000000 0x0 0x0
0xffff918000016780 0001 00000000 0x0 0x0
0xffff918000016800 0001 00000000 0x0 0x0
0xffff918000016880 0001 00000000 0x0 0x0
0xffff918000016900 0001 00000000 0x0 0x0
0xffff918000016980 0001 00000000 0x0 0x0
0xffff918000016a00 0001 00000000 0x0 0x0
0xffff918000016a80 0001 00000000 0x0 0x0
0xffff918000016b00 0001 00000000 0x0 0x0
0xffff918000016b80 0001 00000000 0x0 0x0
0xffff918000016c00 0001 00000000 0x0 0x0
0xffff918000016c80 0001 00000000 0x0 0x0
0xffff918000016d00 0001 00000000 0x0 0x0
0xffff918000016d80 0001 00000000 0x0 0x0
0xffff918000016e00 0001 00000000 0x0 0x0
0xffff918000016e80 0001 00000000 0x0 0x0
0xffff918000016f00 0001 00000000 0x0 0x0
0xffff918000016f80 0001 00000000 0x0 0x0
0xffff918000017000 0001 00000000 0x0 0x0
0xffff918000017080 0001 00000000 0x0 0x0
0xffff918000017100 0001 00000000 0x0 0x0
0xffff918000017180 0001 00000000 0x0 0x0
0xffff918000017200 0001 00000000 0x0 0x0
0xffff918000017280 0001 00000000 0x0 0x0
0xffff918000017300 0001 00000000 0x0 0x0
0xffff918000017380 0001 00000000 0x0 0x0
0xffff918000017400 0041 00000000 0x0 0x0
0xffff918000017480 0041 00000000 0x0 0x0
0xffff918000017500 0041 00000000 0x0 0x0
0xffff918000017580 0041 00000000 0x0 0x0
0xffff918000017600 0041 00000000 0x0 0x0
0xffff918000017680 0041 00000000 0x0 0x0
0xffff918000017700 0041 00000000 0x0 0x0
0xffff918000017780 0041 00000000 0x0 0x0
0xffff918000017800 0041 00000000 0x0 0x0
0xffff918000017880 0041 00000000 0x0 0x0
0xffff918000017900 0041 00000000 0x0 0x0
0xffff918000017980 0041 00000000 0x0 0x0
0xffff918000017a00 0041 00000000 0x0 0x0
0xffff918000017a80 0041 00000000 0x0 0x0
0xffff918000017b00 0041 00000000 0x0 0x0
0xffff918000017b80 0041 00000000 0x0 0x0
0xffff918000017c00 0041 00000000 0x0 0x0
0xffff918000017c80 0041 00000000 0x0 0x0
0xffff918000017d00 0041 00000000 0x0 0x0
0xffff918000017d80 0041 00000000 0x0 0x0
0xffff918000017e00 0041 00000000 0x0 0x0
0xffff918000017e80 0041 00000000 0x0 0x0
0xffff918000017f00 0041 00000000 0x0 0x0
0xffff918000017f80 0041 00000000 0x0 0x0
0xffff918000018000 0041 00000000 0x0 0x0
0xffff918000018080 0041 00000000 0x0 0x0
0xffff918000018100 0041 00000000 0x0 0x0
0xffff918000018180 0041 00000000 0x0 0x0
0xffff918000018200 0041 00000000 0x0 0x0
0xffff918000018280 0041 00000000 0x0 0x0
0xffff918000018300 0041 00000000 0x0 0x0
0xffff918000018380 0041 00000000 0x0 0x0
0xffff918000018400 0041 00000000 0x0 0x0
0xffff918000018480 0041 00000000 0x0 0x0
0xffff918000018500 0041 00000000 0x0 0x0
0xffff918000018580 0041 00000000 0x0 0x0
0xffff918000018600 0041 00000000 0x0 0x0
0xffff918000018680 0041 00000000 0x0 0x0
0xffff918000018700 0041 00000000 0x0 0x0
0xffff918000018780 0041 00000000 0x0 0x0
0xffff918000018800 0041 00000000 0x0 0x0
0xffff918000018880 0041 00000000 0x0 0x0
0xffff918000018900 0041 00000000 0x0 0x0
0xffff918000018980 0041 00000000 0x0 0x0
0xffff918000018a00 0001 00000000 0x0 0x0
0xffff918000018a80 0001 00000000 0x0 0x0
0xffff918000018b00 0001 00000000 0x0 0x0
0xffff918000018b80 0001 00000000 0x0 0x0
0xffff918000018c00 0001 00000000 0x0 0x0
0xffff918000018c80 0001 00000000 0x0 0x0
0xffff918000018d00 0001 00000000 0x0 0x0
0xffff918000018d80 0001 00000000 0x0 0x0
0xffff918000018e00 0001 00000000 0x0 0x0
0xffff918000018e80 0001 00000000 0x0 0x0
0xffff918000018f00 0001 00000000 0x0 0x0
0xffff918000018f80 0001 00000000 0x0 0x0
0xffff918000019000 0001 00000000 0x0 0x0
0xffff918000019080 0001 00000000 0x0 0x0
0xffff918000019100 0001 00000000 0x0 0x0
0xffff918000019180 0001 00000000 0x0 0x0
0xffff918000019200 0001 00000000 0x0 0x0
0xffff918000019280 0001 00000000 0x0 0x0
0xffff918000019300 0001 00000000 0x0 0x0
0xffff918000019380 0001 00000000 0x0 0x0
0xffff918000019400 0001 00000000 0x0 0x0
0xffff918000019480 0001 00000000 0x0 0x0
0xffff918000019500 0001 00000000 0x0 0x0
0xffff918000019580 0001 00000000 0x0 0x0
0xffff918000019600 0001 00000000 0x0 0x0
0xffff918000019680 0001 00000000 0x0 0x0
0xffff918000019700 0001 00000000 0x0 0x0
0xffff918000019780 0001 00000000 0x0 0x0
0xffff918000019800 0001 00000000 0x0 0x0
0xffff918000019880 0001 00000000 0x0 0x0
0xffff918000019900 0001 00000000 0x0 0x0
0xffff918000019980 0001 00000000 0x0 0x0
0xffff918000019a00 0001 00000000 0x0 0x0
0xffff918000019a80 0001 00000000 0x0 0x0
0xffff918000019b00 0001 00000000 0x0

---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches

syzbot

unread,

Aug 14, 2022, 12:36:28 AM8/14/22

to syzkaller-...@googlegroups.com

syzbot has found a reproducer for the following issue on:

HEAD commit: 10849e7835aa pciconf: Skip callbacks for reserved ranges i..
git tree: netbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=15777485080000

kernel config: https://syzkaller.appspot.com/x/.config?x=1420f906d33d9f1f
dashboard link: https://syzkaller.appspot.com/bug?extid=d2df39bb3f72975c0a97
compiler: g++ (Debian 10.2.1-6) 10.2.1 20210110

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1344fec3080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17f89bdd080000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d2df39...@syzkaller.appspotmail.com

[ 37.3398917] panic: UBSan: Undefined Behavior in /syzkaller/managers/ci2-netbsd-kubsan/kernel/sys/kern/subr_autoconf.c:2185:2, member access within null pointer of type 'struct lwp'

[ 37.3592005] cpu1: Begin traceback...
[ 37.3792040] vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
[ 37.4492045] Report() at netbsd:Report+0x3b sys/../common/lib/libc/misc/ubsan.c:1352
[ 37.5092063] HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x1fb sys/../common/lib/libc/misc/ubsan.c:429
[ 37.5692073] config_detach_commit() at netbsd:config_detach_commit+0x242 sys/kern/subr_autoconf.c:2185
[ 37.6192057] cdev_detached() at netbsd:cdev_detached+0x15d sys/kern/subr_devsw.c:1384
[ 37.6692052] vdevgone() at netbsd:vdevgone+0x125 sys/kern/vfs_subr.c:524
[ 37.7192046] audiodetach() at netbsd:audiodetach+0xb8 sys/dev/audio/audio.c:1370
[ 37.7692071] config_detach() at netbsd:config_detach+0x497 sys/kern/subr_autoconf.c:2045
[ 37.8292050] config_detach_children() at netbsd:config_detach_children+0x83 sys/kern/subr_autoconf.c:2206
[ 37.8792042] pad_detach() at netbsd:pad_detach+0x87 sys/dev/pad/pad.c:251
[ 37.9392051] config_detach() at netbsd:config_detach+0x497 sys/kern/subr_autoconf.c:2045
[ 37.9892084] fops_pad_close() at netbsd:fops_pad_close+0xb7 pad_close sys/dev/pad/pad.c:423 [inline]
[ 37.9892084] fops_pad_close() at netbsd:fops_pad_close+0xb7 sys/dev/pad/pad.c:433
[ 38.0392036] closef() at netbsd:closef+0x1cd sys/kern/kern_descrip.c:832
[ 38.0992062] fd_free() at netbsd:fd_free+0x4dc sys/kern/kern_descrip.c:1571
[ 38.1492086] exit1() at netbsd:exit1+0x3a7 sys/kern/kern_exit.c:301
[ 38.1992056] sys_exit() at netbsd:sys_exit+0xd4 sys/kern/kern_exit.c:180
[ 38.2492053] syscall() at netbsd:syscall+0x2da sy_call sys/sys/syscallvar.h:65 [inline]
[ 38.2492053] syscall() at netbsd:syscall+0x2da sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 38.2492053] syscall() at netbsd:syscall+0x2da sys/arch/x86/x86/syscall.c:138
[ 38.2592056] --- syscall (number 1) ---
[ 38.2792049] netbsd:syscall+0x2da:
[ 38.2792049] cpu1: End traceback...
[ 38.2892079] fatal breakpoint trap in supervisor mode
[ 38.2892079] trap type 1 code 0 rip 0xffffffff80221ab5 cs 0x8 rflags 0x246 cr2 0x759f69de92a0 ilevel 0 rsp 0xffffbe02483ef4e0
[ 38.2992016] curlwp 0xffff97c7be1686c0 pid 971.971 lowest kstack 0xffffbe02483eb2c0
Stopped in pid 971.971 (syz-executor1356) at netbsd:breakpoint+0x5: leave

1234 1234 2 0 0 ffff97c7bd107a40 syz-executor1356
1237 >1237 7 0 0 ffff97c7bd01d140 syz-executor1356
1186 1186 2 0 0 ffff97c7be168b00 syz-executor1356
1101 1101 2 1 0 ffff97c7be42a2c0 syz-executor1356
1233 1233 2 0 0 ffff97c7be168280 syz-executor1356
971 > 971 7 1 0 ffff97c7be1686c0 syz-executor1356
1076 1076 2 1 140 ffff97c7bd11ca00 syz-executor1356
1054 1054 2 1 140 ffff97c7bb1ef600 syz-executor1356
1223 1223 2 1 140 ffff97c7bb45f680 syz-executor1356
1220 1220 2 1 140 ffff97c7bd1071c0 syz-executor1356
1194 1194 2 1 140 ffff97c7bd433a80 syz-executor1356
1221 1221 2 0 140 ffff97c7bb45fac0 syz-executor1356
1127 1127 3 0 180 ffff97c7bb7c3ac0 syz-executor1356 nanoslp
1077 1077 2 1 100 ffff97c7bb6ff280 sshd
1079 1079 3 0 180 ffff97c7bb7c3680 getty nanoslp
1071 1071 3 0 180 ffff97c7bb7c3240 getty nanoslp
1068 1068 3 0 180 ffff97c7bd433640 getty nanoslp
1073 1073 3 1 1c0 ffff97c7bb45f240 getty ttyraw
1067 1067 3 1 180 ffff97c7bd433200 sshd select
947 947 3 1 180 ffff97c7bd107600 powerd kqueue
688 688 3 0 180 ffff97c7bc2d3940 syslogd kqueue
600 600 3 0 180 ffff97c7bc41a040 dhcpcd poll
602 602 3 0 180 ffff97c7bba092c0 dhcpcd poll
547 547 3 0 180 ffff97c7bb96f300 dhcpcd poll
588 588 3 0 180 ffff97c7bba09b40 dhcpcd poll
289 289 3 0 180 ffff97c7bba09700 dhcpcd poll
288 288 3 0 180 ffff97c7bb6ff6c0 dhcpcd poll
351 351 3 0 180 ffff97c7bbad2340 dhcpcd poll
1 1 3 1 180 ffff97c7b3046940 init wait
0 936 3 0 200 ffff97c7bb1efa40 physiod physiod
0 194 3 0 200 ffff97c7bb25da80 pooldrain pooldrain
0 193 3 0 200 ffff97c7bb25d640 ioflush syncer
0 192 3 1 200 ffff97c7bb25d200 pgdaemon pgdaemon
0 167 3 1 200 ffff97c7bb1ef1c0 usb7 usbevt
0 166 3 0 200 ffff97c7b8192a00 usb6 usbevt
0 165 3 0 200 ffff97c7b81925c0 usb5 usbevt
0 164 3 0 200 ffff97c7b8192180 usb4 usbevt
0 31 3 0 200 ffff97c7b510d9c0 usb3 usbevt
0 63 3 0 200 ffff97c7b510d580 usb2 usbevt
0 126 3 0 200 ffff97c7b510d140 usb1 usbevt
0 125 3 0 200 ffff97c7b3090980 usb0 usbevt
0 124 3 1 200 ffff97c7b3090540 usbtask-dr usbtsk
0 123 3 1 200 ffff97c7b29426c0 usbtask-hc usbtsk
0 122 3 0 200 ffff97c7b3090100 npfgc0 npfgcw
0 121 3 1 200 ffff97c7b3046500 rt_free rt_free
0 120 3 1 200 ffff97c7b30460c0 unpgc unpgc
0 119 3 0 200 ffff97c7b3029900 key_timehandler key_timehandler
0 118 3 1 200 ffff97c7b2fda300 icmp6_wqinput/1 icmp6_wqinput
0 117 3 0 200 ffff97c7b2fda740 icmp6_wqinput/0 icmp6_wqinput
0 116 3 0 200 ffff97c7b30294c0 nd6_timer nd6_timer
0 115 3 1 200 ffff97c7b3029080 carp6_wqinput/1 carp6_wqinput
0 114 3 0 200 ffff97c7b301c8c0 carp6_wqinput/0 carp6_wqinput
0 113 3 1 200 ffff97c7b301c480 carp_wqinput/1 carp_wqinput
0 112 3 0 200 ffff97c7b301c040 carp_wqinput/0 carp_wqinput
0 111 3 1 200 ffff97c7b2fe7bc0 icmp_wqinput/1 icmp_wqinput
0 110 3 0 200 ffff97c7b2fe7780 icmp_wqinput/0 icmp_wqinput
0 109 3 0 200 ffff97c7b2fdab80 rt_timer rt_timer
0 108 3 0 200 ffff97c7b2fe7340 vmem_rehash vmem_rehash
0 99 3 0 200 ffff97c7b2947b40 entbutler entropy
0 98 3 1 200 ffff97c7b2947700 viomb balloon
0 97 3 1 200 ffff97c7b29472c0 vioif0_txrx/1 vioif0_txrx
0 96 3 0 200 ffff97c7b2942b00 vioif0_txrx/0 vioif0_txrx
0 29 3 1 200 ffff97c7b2942280 scsibus0 sccomp
0 28 3 0 200 ffff97c7b13cbac0 pms0 pmsreset
0 27 3 1 200 ffff97c7b13cb680 xcall/1 xcall
0 26 1 1 200 ffff97c7b13cb240 softser/1
0 25 1 1 200 ffff97c7b138ea80 softclk/1
0 24 1 1 200 ffff97c7b138e640 softbio/1
0 23 1 1 200 ffff97c7b138e200 softnet/1
0 22 1 1 201 ffff97c8df72da40 idle/1
0 21 3 1 200 ffff97c8df72d600 lnxsyswq lnxsyswq
0 20 3 1 200 ffff97c8df72d1c0 lnxubdwq lnxubdwq
0 19 3 0 200 ffff97c8df734a00 lnxpwrwq lnxpwrwq
0 18 3 1 200 ffff97c8df7345c0 lnxlngwq lnxlngwq
0 17 3 1 200 ffff97c8df734180 lnxhipwq lnxhipwq
0 16 3 1 200 ffff97c8df7539c0 lnxrcugc lnxrcugc
0 15 3 0 200 ffff97c8df753580 sysmon smtaskq
0 14 3 1 200 ffff97c8df753140 pmfsuspend pmfsuspend
0 13 3 0 200 ffff97c8df75e980 pmfevent pmfevent
0 12 3 1 200 ffff97c8df75e540 sopendfree sopendfr
0 11 3 1 200 ffff97c8df75e100 iflnkst iflnkst
0 10 3 1 200 ffff97c8e0795940 nfssilly nfssilly
0 9 3 0 200 ffff97c8e0795500 vdrain vdrain
0 8 3 1 200 ffff97c8e07950c0 modunload mod_unld
0 7 3 0 200 ffff97c8e07ba900 xcall/0 xcall
0 6 1 0 200 ffff97c8e07ba4c0 softser/0
0 > 5 7 0 200 ffff97c8e07ba080 softclk/0
0 4 1 0 200 ffff97c8e07eb8c0 softbio/0
0 3 1 0 200 ffff97c8e07eb480 softnet/0
0 2 1 0 201 ffff97c8e07eb040 idle/0
0 0 3 0 200 ffffffff86741940 swapper uvm
[Locks tracked through LWPs]

****** LWP 1234.1234 (syz-executor1356) @ 0xffff97c7bd107a40, l_stat=2

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at pmap_ctor)
lock address : 0xffff97c7bbb0ab80 type : sleep/adaptive
initialized : 0xffffffff80ffd55d

shared holds : 0 exclusive: 0

shares wanted: 0 exclusive: 1

relevant cpu : 0 last held: 0

relevant lwp : 0xffff97c7bd107a40 last held: 000000000000000000
last locked : 0xffffffff80fffc66 unlocked*: 0xffffffff81000343
owner field : 0xffff97c7bd107a40 wait/spin: 0/0

Turnstile: no active turnstile for this lock.

****** LWP 1237.1237 (syz-executor1356) @ 0xffff97c7bd01d140, l_stat=7

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at pmap_ctor)
lock address : 0xffff97c7bc3c7180 type : sleep/adaptive
initialized : 0xffffffff80ffd55d

shared holds : 0 exclusive: 0

shares wanted: 0 exclusive: 1

relevant cpu : 0 last held: 0

relevant lwp : 0xffff97c7bd01d140 last held: 000000000000000000
last locked : 0xffffffff80ffd13b unlocked*: 0xffffffff80ffd328

owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 1101.1101 (syz-executor1356) @ 0xffff97c7be42a2c0, l_stat=2

*** Locks held:

* Lock 0 (initialized at fork1)

lock address : 0xffff97c7bd8ffe90 type : sleep/adaptive

initialized : 0xffffffff836c9d93
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0

relevant cpu : 1 last held: 1

relevant lwp : 0xffff97c7be42a2c0 last held: 0xffff97c7be42a2c0

last locked* : 0xffffffff836c212d unlocked : 000000000000000000

owner/count : 0xffff97c7be42a2c0 flags : 0x0000000000000004

Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 971.971 (syz-executor1356) @ 0xffff97c7be1686c0, l_stat=7

*** Locks held:

* Lock 0 (initialized at fork1)

lock address : 0xffff97c7bd8ff790 type : sleep/adaptive

initialized : 0xffffffff836c9d93
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0

relevant cpu : 1 last held: 1

relevant lwp : 0xffff97c7be1686c0 last held: 0xffff97c7be1686c0

last locked* : 0xffffffff836c212d unlocked : 000000000000000000

owner/count : 0xffff97c7be1686c0 flags : 0x0000000000000004

Turnstile: no active turnstile for this lock.

* Lock 1 (initialized at config_init)
lock address : 0xffffffff86ca9b90 type : sleep/adaptive
initialized : 0xffffffff837cf1da
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0

relevant cpu : 1 last held: 1

relevant lwp : 0xffff97c7be1686c0 last held: 0xffff97c7be1686c0

last locked* : 0xffffffff837d4380 unlocked : 0xffffffff837d4b04

owner field : 0xffff97c7be1686c0 wait/spin: 0/0

Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 688.688 (syslogd) @ 0xffff97c7bc2d3940, l_stat=3

*** Locks held:

* Lock 0 (initialized at vcache_alloc)

lock address : 0xffff97c7bd820980 type : sleep/adaptive

initialized : 0xffffffff839e89c1
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0

relevant lwp : 0xffff97c7bc2d3940 last held: 0xffff97c7bc2d3940

last locked* : 0xffffffff83a49230 unlocked : 0xffffffff83a493b4

owner/count : 000000000000000000 flags : 000000000000000000

Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 602.602 (dhcpcd) @ 0xffff97c7bba092c0, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff86bd7a80 type : sleep/adaptive
initialized : 0xffffffff83706cc7
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0

relevant lwp : 0xffff97c7bba092c0 last held: 000000000000000000