panic: [ 227.ADDR] vpanic() at netbsd:vpanic+0x91a

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syzbot

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Sep 13, 2020, 9:05:23 AM9/13/20
to syzkaller-...@googlegroups.com
Hello,

syzbot found the following issue on:

HEAD commit: 68ae015e Add missing prototypes for __bs_c(f,_bs_sm_?_swap)
git tree: netbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=138a0f71900000
kernel config: https://syzkaller.appspot.com/x/.config?x=739e57438eb9ed9e
dashboard link: https://syzkaller.appspot.com/bug?extid=bc493c8ca03ae8b37948
compiler: clang version 3.8.0-2ubuntu4 (tags/RELEASE_380/final)

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+bc493c...@syzkaller.appspotmail.com

48403] panic: [ 227.0548269] vpanic() at netbsd:vpanic+0x91a sys/kern/subr_prf.c:288
[ 227.1048265] kern_assert() at netbsd:kern_assert+0x214
[ 227.1648237] fixjobc() at netbsd:fixjobc+0x11fb sys/kern/kern_proc.c:1557
[ 227.2248234] exit1() at netbsd:exit1+0x1455 sys/kern/kern_exit.c:425
[ 227.2948214] sys_exit() at netbsd:sys_exit+0x1ca sys/kern/kern_exit.c:185
[ 227.3548281] syscall() at netbsd:syscall+0x42d sy_call sys/sys/syscallvar.h:65 [inline]
[ 227.3548281] syscall() at netbsd:syscall+0x42d sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 227.3548281] syscall() at netbsd:syscall+0x42d sys/arch/x86/x86/syscall.c:138
[ 227.3748294] --- syscall (number 1) ---
[ 227.3848364] netbsd:syscall+0x42d:
[ 227.3948243] cpu1: End traceback...
[ 227.3948243] fatal breakpoint trap in supervisor mode
[ 227.4048182] trap type 1 code 0 rip 0xffffffff8022286d cs 0x8 rflags 0x246 cr2 0xc000733000 ilevel 0 rsp 0xffff9c008efa69a0
[ 227.4148174] curlwp 0xffff9c00134e48c0 pid 13406.13406 lowest kstack 0xffff9c008ef9f2c0
Stopped in pid 13406.13406 (syz-executor.1) at netbsd:breakpoint+0x5: leave
?
breakpoint() at netbsd:breakpoint+0x5
vpanic() at netbsd:vpanic+0x91a sys/kern/subr_prf.c:288
kern_assert() at netbsd:kern_assert+0x214
fixjobc() at netbsd:fixjobc+0x11fb sys/kern/kern_proc.c:1557
exit1() at netbsd:exit1+0x1455 sys/kern/kern_exit.c:425
sys_exit() at netbsd:sys_exit+0x1ca sys/kern/kern_exit.c:185
syscall() at netbsd:syscall+0x42d sy_call sys/sys/syscallvar.h:65 [inline]
syscall() at netbsd:syscall+0x42d sy_invoke sys/sys/syscallvar.h:94 [inline]
syscall() at netbsd:syscall+0x42d sys/arch/x86/x86/syscall.c:138
--- syscall (number 1) ---
netbsd:syscall+0x42d:
Panic string: kernel diagnostic assertion "hispgrp->pg_jobc > 0" failed: file "/syzkaller/managers/netbsd-kmsan/kernel/sys/kern/kern_proc.c", line 1563
PID LID S CPU FLAGS STRUCT LWP * NAME WAIT
6438 12742 2 0 0 ffff9c00134c7780 syz-executor.3
6438 6438 2 0 10000000 ffff9c0013638140 syz-executor.3
6542 6542 3 0 80 ffff9c001283c8c0 syz-executor.1 parked
6550 6550 3 0 80 ffff9c001363b180 syz-executor.5 parked
6534 6619 3 1 80 ffff9c001361b100 syz-executor.0 parked
6534 13348 3 0 80 ffff9c0013609940 syz-executor.0 parked
6534 6534 2 0 10040000 ffff9c0013609500 syz-executor.0
6383 6383 2 0 0 ffff9c001382a1c0 syz-executor.1
6435 >13757 7 0 40000 ffff9c001361b980 syz-executor.5
6435 6435 2 0 10040000 ffff9c00127301c0 syz-executor.5
12099 12099 3 1 80 ffff9c00134c7340 syz-executor.0 parked
13406>13406 7 1 10040000 ffff9c00134e48c0 syz-executor.1
6618 13896 3 0 80 ffff9c00134c7bc0 syz-executor.2 parked
6618 7122 2 1 40000 ffff9c00132276c0 syz-executor.2
6618 6618 2 0 10040000 ffff9c00136389c0 syz-executor.2
7759 13534 2 1 40000 ffff9c0013638580 syz-executor.4
7759 7759 2 1 10040000 ffff9c0013362700 syz-executor.4
3230 3230 3 0 80 ffff9c001295c780 syz-executor.2 parked
4270 4270 3 0 80 ffff9c00134e4040 syz-executor.2 parked
3057 3057 3 1 80 ffff9c0012946300 syz-executor.2 parked
4008 4008 3 0 80 ffff9c00133622c0 syz-executor.5 parked
10084 10084 3 0 80 ffff9c0012c22900 syz-executor.3 parked
2797 2797 3 1 80 ffff9c0013374b80 syz-executor.5 parked
2957 2957 3 0 80 ffff9c0012765200 syz-executor.3 parked
8403 8403 3 0 80 ffff9c00134ee900 syz-executor.1 parked
8157 8157 3 0 80 ffff9c001295cbc0 syz-executor.4 parked
7494 7494 3 0 80 ffff9c001311cac0 syz-executor.4 parked
8634 8634 3 0 80 ffff9c0013227b00 syz-executor.2 parked
2224 2224 3 0 80 ffff9c0013374740 syz-executor.0 parked
1697 1697 3 0 80 ffff9c0012c2a940 syz-executor.0 parked
1061 1061 3 1 80 ffff9c0013374300 syz-executor.2 parked
1063 1063 3 0 80 ffff9c0013362b40 syz-executor.5 parked
1168 1168 3 0 80 ffff9c0012730600 syz-executor.4 parked
1177 1177 3 0 80 ffff9c0013227280 syz-executor.0 parked
1020 1020 3 0 80 ffff9c0012765a80 syz-executor.5 parked
1018 1018 3 1 80 ffff9c001311c240 syz-executor.5 parked
1015 1015 3 0 80 ffff9c001283c480 syz-executor.5 parked
1329 1329 3 0 80 ffff9c00127b02c0 syz-executor.0 parked
7872 7872 3 1 80 ffff9c0012c2a0c0 syz-executor.4 parked
5961 5961 3 0 80 ffff9c0012730a40 syz-executor.3 parked
1730 1730 3 0 80 ffff9c0012765640 syz-executor.0 parked
7740 7740 3 0 80 ffff9c0012ce2180 syz-executor.3 parked
1705 1705 3 0 80 ffff9c0012ce2a00 syz-executor.0 parked
930 930 3 1 80 ffff9c0012c224c0 syz-executor.3 parked
7908 7908 3 0 80 ffff9c0012ce25c0 syz-executor.4 parked
641 641 3 1 80 ffff9c0012c22080 syz-executor.4 parked
640 640 3 1 80 ffff9c00127b0700 syz-executor.4 parked
644 644 3 1 80 ffff9c0012946b80 syz-executor.2 parked
1381 1381 3 1 80 ffff9c0012479980 syz-executor.2 parked
973 973 3 1 80 ffff9c0012787680 syz-executor.1 parked
7109 7109 3 0 80 ffff9c0012d00100 syz-executor.5 parked
6851 6851 3 0 80 ffff9c0012c879c0 syz-executor.2 parked
7870 7870 3 0 80 ffff9c0012c87580 syz-executor.4 parked
1460 1460 3 0 80 ffff9c0012c87140 syz-executor.5 parked
5811 5811 3 1 80 ffff9c0012946740 syz-executor.3 parked
1708 1708 3 0 80 ffff9c00125c4a40 syz-executor.0 parked
7595 7595 3 1 80 ffff9c00126dd200 syz-executor.2 parked
1066 1066 3 1 80 ffff9c0012d00540 syz-executor.1 parked
7588 7588 3 0 80 ffff9c001283c040 syz-executor.3 parked
408 408 3 1 80 ffff9c001295c340 syz-executor.3 parked
407 407 3 0 80 ffff9c00127ad280 syz-executor.4 parked
403 403 3 0 80 ffff9c0012c2a500 syz-executor.0 parked
396 396 3 1 80 ffff9c0012d00980 syz-executor.5 parked
394 394 3 1 80 ffff9c00127ad6c0 syz-executor.1 parked
7232 7232 3 1 80 ffff9c00126dda80 syz-executor.0 parked
6995 6995 3 0 80 ffff9c00127b0b40 syz-executor.2 parked
6346 6346 3 0 80 ffff9c00125b65c0 syz-executor.2 parked
5810 5810 3 0 80 ffff9c00127adb00 syz-executor.5 parked
5427 5427 3 0 80 ffff9c00125a4580 syz-executor.2 parked
5577 5577 3 1 80 ffff9c00125a49c0 syz-executor.0 parked
1873 1873 3 1 80 ffff9c0012787240 syz-executor.5 parked
1743 1743 3 0 80 ffff9c00125a4140 syz-executor.5 parked
1436 1436 3 1 80 ffff9c0012787ac0 syz-executor.5 parked
1324 1324 3 0 80 ffff9c00126dd640 syz-executor.1 parked
1383 1383 3 1 80 ffff9c00125c4600 syz-executor.1 parked
1382 1382 3 0 80 ffff9c00125b6a00 syz-executor.1 parked
290 290 3 1 80 ffff9c00125b6180 syz-executor.4 parked
1223 1223 3 0 80 ffff9c00125c41c0 syz-executor.1 parked
1072 1072 2 1 40 ffff9c0012479540 syz-executor.2
850 850 2 1 40 ffff9c0012479100 syz-executor.5
1071 1071 2 1 40 ffff9c0012372940 syz-executor.4
1078 1078 2 1 40 ffff9c0012372500 syz-executor.3
1081 1081 3 0 40 ffff9c00123720c0 syz-executor.1 tstile
1092 1092 2 0 40 ffff9c0012345900 syz-executor.0
1250 419 2 1 40 ffff9c00123454c0 syz-fuzzer
1250 1077 2 1 0 ffff9c0012345080 syz-fuzzer
1250 1076 3 0 80 ffff9c0011c128c0 syz-fuzzer parked
1250 1065 3 0 80 ffff9c0011c12480 syz-fuzzer parked
1250 1249 3 1 80 ffff9c0011c12040 syz-fuzzer parked
1250 945 3 0 80 ffff9c0011342680 syz-fuzzer parked
1250 1070 3 0 80 ffff9c0011342240 syz-fuzzer parked
1250 1064 2 1 40 ffff9c0011b26bc0 syz-fuzzer
1250 1250 3 0 80 ffff9c0011244a80 syz-fuzzer parked
1253 1253 3 0 80 ffff9c0011430b00 sshd select
938 938 3 1 80 ffff9c0011b26780 getty nanoslp
951 951 3 0 80 ffff9c0011244640 getty nanoslp
696 696 3 1 80 ffff9c0011244200 getty nanoslp
1090 1090 3 1 c0 ffff9c001120e5c0 getty ttyraw
941 941 3 1 80 ffff9c0011b26340 sshd select
982 982 3 0 80 ffff9c0011af7740 powerd kqueue
735 735 3 1 80 ffff9c0011556b40 syslogd kqueue
592 592 3 0 80 ffff9c00114306c0 dhcpcd poll
590 590 3 0 80 ffff9c0011af7b80 dhcpcd poll
589 589 3 0 80 ffff9c0011430280 dhcpcd poll
545 545 3 0 80 ffff9c0011af7300 dhcpcd poll
347 347 3 0 80 ffff9c0011556700 dhcpcd poll
346 346 3 1 80 ffff9c0011342ac0 dhcpcd poll
345 345 3 0 80 ffff9c00115562c0 dhcpcd poll
1 1 3 0 80 ffff9c0010eec900 init wait
0 4226 3 0 200 ffff9c001311c680 acctwatch actwat
0 860 3 1 200 ffff9c001120ea00 physiod physiod
0 166 3 0 200 ffff9c0011217600 ioflush syncer
0 167 3 0 200 ffff9c0011217a40 pooldrain pooldrain
0 165 3 1 200 ffff9c00112171c0 pgdaemon pgdaemon
0 160 3 1 200 ffff9c001120e180 usb7 usbevt
0 31 3 1 200 ffff9c00111749c0 usb6 usbevt
0 63 3 0 200 ffff9c0011174580 usb5 usbevt
0 126 3 0 240 ffff9c0011174140 usb4 tstile
0 125 3 1 200 ffff9c00110c1980 usb3 usbevt
0 124 3 1 200 ffff9c00110c1540 usb2 usbevt
0 123 3 1 200 ffff9c00110c1100 usb1 usbevt
0 122 3 1 200 ffff9c00110ae940 usb0 usbevt
0 121 3 1 200 ffff9c00110ae500 usbtask-dr usbtsk
0 120 3 1 200 ffff9c00110ae0c0 usbtask-hc usbtsk
0 119 3 0 200 ffff9c000f433ac0 npfgc0 npfgcw
0 118 3 1 200 ffff9c0010eec4c0 rt_free rt_free
0 117 3 1 200 ffff9c0010eec080 unpgc unpgc
0 116 3 0 200 ffff9c0010ee88c0 key_timehandler key_timehandler
0 115 3 1 200 ffff9c0010ee8480 icmp6_wqinput/1 icmp6_wqinput
0 114 3 0 200 ffff9c0010ee8040 icmp6_wqinput/0 icmp6_wqinput
0 113 3 0 200 ffff9c0010eddbc0 nd6_timer nd6_timer
0 112 3 1 200 ffff9c0010edd780 carp6_wqinput/1 carp6_wqinput
0 111 3 0 200 ffff9c0010edd340 carp6_wqinput/0 carp6_wqinput
0 110 3 1 200 ffff9c0010ce0b80 carp_wqinput/1 carp_wqinput
0 109 3 0 200 ffff9c0010ce0740 carp_wqinput/0 carp_wqinput
0 108 3 1 200 ffff9c0010ce0300 icmp_wqinput/1 icmp_wqinput
0 107 3 0 200 ffff9c001081db00 icmp_wqinput/0 icmp_wqinput
0 106 3 0 200 ffff9c0010cde700 rt_timer rt_timer
0 105 3 1 200 ffff9c0010cde2c0 vmem_rehash vmem_rehash
0 104 3 1 200 ffff9c0010cdeb40 entbutler entropy
0 30 3 1 200 ffff9c001081d6c0 vioif0_txrx/1 vioif0_txrx
0 29 3 0 200 ffff9c001081d280 vioif0_txrx/0 vioif0_txrx
0 27 3 0 200 ffff9c000f433680 scsibus0 sccomp
0 26 3 0 200 ffff9c000f433240 pms0 pmsreset
0 25 3 1 200 ffff9c000f423a80 xcall/1 xcall
0 24 1 1 200 ffff9c000f423640 softser/1
0 23 1 1 200 ffff9c000f423200 softclk/1
0 22 1 1 200 ffff9c000f421a40 softbio/1
0 21 1 1 200 ffff9c000f421600 softnet/1
0 20 1 1 201 ffff9c000f4211c0 idle/1
0 19 3 1 200 ffff9c000e29da00 lnxpwrwq lnxpwrwq
0 18 3 1 200 ffff9c000e29d5c0 lnxlngwq lnxlngwq
0 17 3 1 200 ffff9c000e29d180 lnxsyswq lnxsyswq
0 16 3 1 200 ffff9c000e2979c0 lnxrcugc lnxrcugc
0 15 3 0 200 ffff9c000e297580 sysmon smtaskq
0 14 3 1 200 ffff9c000e297140 pmfsuspend pmfsuspend
0 13 3 0 200 ffff9c000e293980 pmfevent pmfevent
0 12 3 0 200 ffff9c000e293540 sopendfree sopendfr
0 11 3 0 200 ffff9c000e293100 iflnkst iflnkst
0 10 3 0 200 ffff9c000e28a940 nfssilly nfssilly
0 9 3 0 200 ffff9c000e28a500 vdrain vdrain
0 8 3 0 200 ffff9c000e28a0c0 modunload mod_unld
0 7 3 0 200 ffff9c000dc87900 xcall/0 xcall
0 6 1 0 200 ffff9c000dc874c0 softser/0
0 5 1 0 200 ffff9c000dc87080 softclk/0
0 4 1 0 200 ffff9c000dc858c0 softbio/0
0 3 1 0 200 ffff9c000dc85480 softnet/0
0 2 1 0 201 ffff9c000dc85040 idle/0
0 0 3 0 200 ffffffff8624f440 swapper uvm
[Locks tracked through LWPs]

****** LWP 6383.6383 (syz-executor.1) @ 0xffff9c001382a1c0, l_stat=2

*** Locks held:

* Lock 0 (initialized at pmap_ctor)
lock address : 0xffff9c00130f0c40 type : sleep/adaptive
initialized : 0xffffffff817e3990
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff9c001382a1c0 last held: 0xffff9c001382a1c0
last locked* : 0xffffffff817feb3b unlocked : 0xffffffff818048de
owner field : 0xffff9c001382a1c0 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 6435.6435 (syz-executor.5) @ 0xffff9c00127301c0, l_stat=2

*** Locks held:

* Lock 0 (initialized at amap_ctor)
lock address : 0xffff9c001246ad00 type : sleep/adaptive
initialized : 0xffffffff84a416b0
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff9c00127301c0 last held: 0xffff9c00127301c0
last locked* : 0xffffffff84a778d7 unlocked : 0xffffffff84a878e5
owner/count : 000000000000000000 flags : 000000000000000000
Turnstile: no active turnstile for this lock.

*** Locks wanted:

* Lock 0 (initialized at pmap_ctor)
lock address : 0xffff9c00130f0a80 type : sleep/adaptive
initialized : 0xffffffff817e3990
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 1
relevant cpu : 0 last held: 0
relevant lwp : 0xffff9c00127301c0 last held: 000000000000000000
last locked : 0xffffffff817feb3b unlocked*: 0xffffffff818048de
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 13406.13406 (syz-executor.1) @ 0xffff9c00134e48c0, l_stat=7

*** Locks held:

* Lock 0 (initialized at fork1)
lock address : 0xffff9c001372ef90 type : sleep/adaptive
initialized : 0xffffffff84c34ac2
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffff9c00134e48c0 last held: 0xffff9c00134e48c0
last locked* : 0xffffffff84c264bf unlocked : 000000000000000000
owner/count : 0xffff9c00134e48c0 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

* Lock 1 (initialized at procinit)
lock address : 0xffffffff862cf600 type : sleep/adaptive
initialized : 0xffffffff84cb7185
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffff9c00134e48c0 last held: 0xffff9c00134e48c0
last locked* : 0xffffffff84c2683a unlocked : 0xffffffff84c2f446
owner field : 0xffff9c00134e48c0 wait/spin: 1/0
Turnstile:
=> 0 waiting readers:
=> 1 waiting writers: 0xffff9c00123720c0

*** Locks wanted: none

****** LWP 7759.13534 (syz-executor.4) @ 0xffff9c0013638580, l_stat=2

*** Locks held:

* Lock 0 (initialized at vhci_attach)
lock address : 0xffff9c000e1336d8 type : sleep/adaptive
initialized : 0xffffffff8215e1e6
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffff9c0013638580 last held: 0xffff9c0013638580
last locked* : 0xffffffff8215a21b unlocked : 0xffffffff8215adc2
owner field : 0xffff9c0013638580 wait/spin: 1/0
Turnstile:
=> 0 waiting readers:
=> 1 waiting writers: 0xffff9c0011174140

*** Locks wanted: none

****** LWP 590.590 (dhcpcd) @ 0xffff9c0011af7b80, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff862cf540 type : sleep/adaptive
initialized : 0xffffffff84c8db03
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff9c0011af7b80 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 589.589 (dhcpcd) @ 0xffff9c0011430280, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff862cf540 type : sleep/adaptive
initialized : 0xffffffff84c8db03
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff9c0011430280 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 346.346 (dhcpcd) @ 0xffff9c0011342ac0, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff862cf540 type : sleep/adaptive
initialized : 0xffffffff84c8db03
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 0
relevant lwp : 0xffff9c0011342ac0 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 345.345 (dhcpcd) @ 0xffff9c00115562c0, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff862cf540 type : sleep/adaptive
initialized : 0xffffffff84c8db03
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff9c00115562c0 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) @ 0xffff9c000e293100, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff862cf540 type : sleep/adaptive
initialized : 0xffffffff84c8db03
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff9c000e293100 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 0.6 (softser/0) @ 0xffff9c000dc874c0, l_stat=1

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at main)
lock address : 0xffffffff862cf440 type : spin
initialized : 0xffffffff84b8dcbb
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 1
relevant cpu : 0 last held: 0
relevant lwp : 0xffff9c000dc874c0 last held: 000000000000000000
last locked : 0xffffffff84d379d0 unlocked*: 0xffffffff84d37a39
curcpu holds : 0 wanted by: 000000000000000000

****** LWP 0.5 (softclk/0) @ 0xffff9c000dc87080, l_stat=1

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff862cf540 type : sleep/adaptive
initialized : 0xffffffff84c8db03
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff9c000dc87080 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 com_attach_subr)
lock address : 0xffff9c0010ccff40 type : spin
initialized : 0xffffffff81f2e8e9
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff9c001361b980 last held: 0xffff9c000dc874c0
last locked* : 0xffffffff81f3fb22 unlocked : 0xffffffff81f445ba
owner field : 0x0000000000000800 wait/spin: 0/1

PAGE FLAG PQ UOBJECT UANON
0xffff9c0000017180 0041 00000000 0x0 0x0
0xffff9c0000017200 0041 00000000 0x0 0x0
0xffff9c0000017280 0041 00000000 0x0 0x0
0xffff9c0000017300 0041 00000000 0x0 0x0
0xffff9c0000017380 0041 00000000 0x0 0x0
0xffff9c0000017400 0041 00000000 0x0 0x0
0xffff9c0000017480 0041 00000000 0x0 0x0
0xffff9c0000017500 0041 00000000 0x0 0x0
0xffff9c0000017580 0041 00000000 0x0 0x0
0xffff9c0000017600 0041 00000000 0x0 0x0
0xffff9c0000017680 0041 00000000 0x0 0x0
0xffff9c0000017700 0041 00000000 0x0 0x0
0xffff9c0000017780 0041 00000000 0x0 0x0
0xffff9c0000017800 0041 00000000 0x0 0x0
0xffff9c0000017880 0041 00000000 0x0 0x0
0xffff9c0000017900 0041 00000000 0x0 0x0
0xffff9c0000017980 0041 00000000 0x0 0x0
0xffff9c0000017a00 0041 00000000 0x0 0x0
0xffff9c0000017a80 0041 00000000 0x0 0x0
0xffff9c0000017b00 0041 00000000 0x0 0x0
0xffff9c0000017b80 0001 00000000 0x0 0x0
0xffff9c0000017c00 0001 00000000 0x0 0x0
0xffff9c0000017c80 0001 00000000 0x0 0x0
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0xffff9c0000025c80 0001 00000000 0x0 0x0
0xffff9c0000025d00 0001 00000000 0x0 0x0
0xffff9c0000025d80 0001 00000000 0x0 0x0
0xffff9c0000025e00 0001 00000000 0x0 0x0
0xffff9c0000025e80 0001 00000000 0x0 0x0
0xffff9c0000025f00 0001 00000000 0x0 0x0
0xffff9c0000025f80 0001 00000000 0x0 0x0
0xffff9c0000026000 0001 00000000 0x0 0x0
0xffff9c0000026080 0001 00000000 0x0 0x0
0xffff9c0000026100 0001 00000000 0x0 0x0
0xffff9c0000026180 0001 00000000 0x0 0x0
0xffff9c0000026200 0001 00000000 0x0 0x0
0xffff9c0000026280 0001 00000000 0x0 0x0
0xffff9c0000026300 0001 00000000 0x0 0x0
0xffff9c0000026380 0001 00000000 0x0 0x0
0xffff9c0000026400 0001 00000000 0x0 0x0
0xffff9c0000026480 0001 00000000 0x0 0x0
0xffff9c0000026500 0001 00000000 0x0 0x0
0xffff9c0000026580 0001 00000000 0x0 0x0
0xffff9c0000026600 0001 00000000 0x0 0x0
0xffff9c0000026680 0001 00000000 0x0 0x0
0xffff9c0000026700 0001 00000000 0x0 0x0
0xffff9c0000026780 0001 00000000 0x0 0x0
0xffff9c0000026800 0001 00000000 0x0 0x0
0xffff9c0000026880 0001 00000000 0x0 0x0
0xffff9c0000026900 0001 00000000 0x0 0x0
0xffff9c0000026980 0001 00000000 0x0 0x0
0xffff9c0000026a00 0001 00000000 0x0 0x0
0xffff9c0000026a80 0001 00000000 0x0 0x0
0xffff9c0000026b00 0001 00000000 0x0 0x0
0xffff9c0000026b80 0001 00000000 0x0 0x0
0xffff9c0000026c00 0001 00000000 0x0 0x0
0xffff9c0000026c80 0001 00000000 0x0 0x0
0xffff9c0000026d00 0001 00000000 0x0 0x0
0xffff9c0000026d80 0001 00000000 0x0 0x0
0xffff9c0000026e00 0001 00000000 0x0 0x0
0xffff9c0000026e80 0001 00000000 0x0 0x0
0xffff9c0000026f00 0001 00000000 0x0 0x0
0xffff9c0000026f80 0001 00000000 0x0 0x0
0xffff9c0000027000 0001 00000000 0x0 0x0
0xffff9c0000027080 0001 00000000 0x0 0x0
0xffff9c0000027100 0001 00000000 0x0 0x0
0xffff9c0000027180 0001 00000000 0x0 0x0
0xffff9c0000027200 0001 00000000 0x0 0x0
0xffff9c0000027280 0001 00000000 0x0 0x0
0xffff9c0000027300 0001 00000000 0x0 0x0
0xffff9c0000027380 0001 00000000 0x0 0x0
0xffff9c0000027400 0001 00000000 0x0 0x0
0xffff9c0000027480 0001 00000000 0x0 0x0
0xffff9c0000027500 0001 00000000 0x0 0x0
0xffff9c0000027580 0001 00000000 0x0 0x0
0xffff9c0000027600 0001 00000000 0x0 0x0
0xffff9c0000027680 0001 00000000 0x0 0x0
0xffff9c0000027700 0001 00000000 0x0 0x0
0xffff9c0000027780 0001 00000000 0x0 0x0
0xffff9c0000027800 0001 00000000 0x0 0x0
0xffff9c0000027880 0001 00000000 0x0 0x0
0xffff9c0000027900 0001 00000000 0x0 0x0
0xffff9c0000027980 0001 00000000 0x0 0x0
0xffff9c0000027a00 0001 00000000 0x0 0x0
0xffff9c0000027a80 0001 00000000 0x0 0x0
0xffff9c0000027b00 0001 00000000 0x0 0x0
0xffff9c0000027b80 0001 00000000 0x0 0x0
0xffff9c0000027c00 0001 00000000 0x0 0x0
0xffff9c0000027c80 0001 00000000 0x0 0x0
0xffff9c0000027d00 0001 00000000 0x0 0x0
0xffff9c0000027d80 0001 00000000 0x0 0x0
0xffff9c0000027e00 0001 00000000 0x0 0x0
0xffff9c0000027e80 0001 00000000 0x0 0x0
0xffff9c0000027f00 0001 00000000 0x0 0x0
0xffff9c0000027f80 0001 00000000 0x0 0x0
0xffff9c0000028000 0001 00000000 0x0 0x0
0xffff9c0000028080 0001 00000000 0x0 0x0
0xffff9c0000028100 0001 00000000 0x0 0x0
0xffff9c0000028180 0001 00000000 0x0 0x0
0xffff9c0000028200 0001 00000000 0x0 0x0
0xffff9c0000028280 0001 00000000 0x0 0x0
0xffff9c0000028300 0001 00000000 0x0 0x0
0xffff9c0000028380 0001 00000000 0x0 0x0
0xffff9c0000028400 0001 00000000 0x0 0x0
0xffff9c0000028480 0001 00000000 0x0 0x0
0xffff9c0000028500 0001 00000000 0x0 0x0
0xffff9c0000028580 0001 00000000 0x0 0x0
0xffff9c0000028600 0001 00000000 0x0 0x0
0xffff9c0000028680 0001 00000000 0x0 0x0
0xffff9c0000028700 0001 00000000 0x0 0x0
0xffff9c0000028780 0001 00000000 0x0 0x0
0xffff9c0000028800 0001 00000000 0x0 0x0
0xffff9c0000028880 0001 00000000 0x0 0x0
0xffff9c0000028900 0001 00000000 0x0 0x0
0xffff9c0000028980 0001 00000000 0x0 0x0
0xffff9c0000028a00 0001 00000000 0x0 0x0
0xffff9c0000028a80 0001 00000000 0x0 0x0
0xffff9c0000028b00 0001 00000000 0x0 0x0
0xffff9c0000028b80 0001 00000000 0x0 0x0
0xffff9c0000028c00 0001 00000000 0x0 0x0
0xffff9c0000028c80 0001 00000000 0x0 0x0
0xffff9c0000028d00 0001 00000000 0x0 0x0
0xffff9c0000028d80 0001 00000000 0x0 0x0
0xffff9c0000028e00 0001 00000000 0x0 0x0
0xffff9c0000028e80 0001 00000000 0x0 0x0
0xffff9c0000028f00 0001 00000000 0x0 0x0
0xffff9c0000028f80 0001 00000000 0x0 0x0
0xffff9c0000029000 0001 00000000 0x0 0x0
0xffff9c0000029080 0001 00000000 0x0 0x0
0xffff9c0000029100 0001 00000000 0x0 0x0
0xffff9c0000029180 0001 00000000 0x0 0x0
0xffff9c0000029200 0001 00000000 0x0 0x0
0xffff9c0000029280 0001 00000000 0x0 0x0
0xffff9c0000029300 0001 00000000 0x0 0x0
0xffff9c0000029380 0001 00000000 0x0 0x0
0xffff9c0000029400 0001 00000000 0x0 0x0
0xffff9c0000029480 0001 00000000 0x0 0x0
0xffff9c0000029500 0001 00000000 0x0 0x0
0xffff9c0000029580 0001 00000000 0x0 0x0
0xffff9c0000029600 0001 00000000 0x0 0x0
0xffff9c0000029680 0001 00000000 0x0 0x0
0xffff9c0000029700 0001 00000000 0x0 0x0
0xffff9c0000029780 0001 00000000 0x0 0x0
0xffff9c0000029800 0001 00000000 0x0 0x0
0xffff9c0000029880 0001 00000000 0x0 0x0
0xffff9c0000029900 0001 00000000 0x0 0x0
0xffff9c0000029980 0001 00000000 0x0 0x0
0xffff9c0000029a00 0001 00000000 0x0 0x0
0xffff9c0000029a80 0001 00000000 0x0 0x0
0xffff9c0000029b00 0001 00000000 0x0 0x0
0xffff9c0000029b80 0001 00000000

---
This report is generated by a bot. It may contain errors.
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syzbot

unread,
Dec 12, 2020, 8:05:07 AM12/12/20
to syzkaller-...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
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