panic: kernel diagnostic assertioWnA RN"lIwNGpc: ntde f>au=l 0te" df maimalepd(): fshilare e" t/sypyez katol lMeAr/P_Pm

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syzbot

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Jun 29, 2019, 10:11:06 AM6/29/19
to syzkaller-...@googlegroups.com
Hello,

syzbot found the following crash on:

HEAD commit: 4c749045 Revert previous and do the off == 1 case after we..
git tree: netbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=139faff3a00000
dashboard link: https://syzkaller.appspot.com/bug?extid=a03ca850816ef3fdb7f6

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

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+a03ca8...@syzkaller.appspotmail.com

[ 459.2732347] panic: kernel diagnostic assertioWnA RN"lIwNGpc: ntde f>au=l
0te" df maimalepd(): fshilare e" t/sypyez katol lMeAr/P_PmanRIaVgeArTsE/
n(peitdb sd31/k9e6r cnoelmm/asnyds /kseyzrn-e/kexrenc_uutiord.i1)n
f[
459.2[ 475392.324976]7 3o3.c1"] ,W lARiNnIe NG22:5 S P
[
[4 5495.92.9296677333311]] Lc pNuO1T :L OBWEeRgEiDn tONr
aSceYSbCacAkLL. .0 .[

459.2967331] -1232976 EXIT bca11750 7
[ 459.3132815] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.3132815] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.3241657] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.3241657] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.3353651] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.3353651] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.3462310] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.3462310[] 4 5WA9R.NI3N46G:2 3S1P0L] vNOpTani LcO(W)E aREtD ON TRAP
EXIT 6 0
[ 459.3595213] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.3648957] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.3648957] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 4[59 4.35795.536795356] 93ne] tbWAsdRN:INvpGa: niScPL+ 0NxO2T6 7L
[
459.3755693] OWERED ON TRAP EXIT 6 0
[ 459.3850434] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.3850434] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.3955115] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.3955115] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.4066656] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.4066656] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.4174190] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.4174190] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.4284304] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.4343491] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.4343491] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.4452315] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.4452315] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.4563330] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.[ 4545693.343056]3 3W3A0RN]I _NGGL:O BSPALL_ N_OsTu b_LODW_E6R5E53D5
_ON0 _TcpRuAP_ cEonXIfigT ur6 0e
[
459[. 445596.3437310]6 (15)6 a]t W ARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.4784695] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.4838364] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.4838364] WARNING: SPL NOT LOWERED ON TRAP EXIneTt 6b s0d[

45[9 .4458398.439654]08 :9_0G] LOWABARLN_I_NGsu:b _SDP_6L5 5NO35T
_LO0_WEcpRuE_cD oOnfN igTRuArPe
[
459.4950890] EXIT 6 0
[ 459.5061151] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.5061151] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.5168380] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.5168380] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.5276559] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.5276559] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.5387130] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.5738106] chglwpcnt() at WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.5940972] WARNING: SPL NOT LOWERED ON SYSCALL 0 -215627528 EXIT
f325c800 7
[ 459.5940972] netbsd:chglwpcnt+0x67
[ 459.6439535] WARNING: SPL NOT LOWERED ON SYSCALL 0 -215627528 EXIT
f325c800 7
[ 459.6840345] lwp_free() at WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.7042154] netbsd:lwp_free+0x10b
[ 459.7541744] WARNING: SPL NOT LOWERED ON SYSCALL 56 249 EXIT 4a011750 7
[ 459.7541744] WARNING: SPL NOT LOWERED ON SYSCALL 2519 1251561536 EXIT 0 7
[ 459.7716940] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.7769968] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.7769968] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.7876136] W[A R4N5I9N.G78:7 S6P1L3 6]N OlTw LpO_wWaEiREt(D )O Nat T
RAP EXIT 6 0
[ 459.7956737] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.7956737] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.8062114] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.[8 046529.11840]6 2W1A14RN]I nNeG:tb SsdP:L lNwpO_T waLiOtWE+0RxE1D
3fO
N[
459.8062114] TRAP EXIT 6 0
[ 459.8215015] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.8268416] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.8268416] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.8374075] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.8374075] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.8480250] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.8480250] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 459.8944546] exit_lwps() at netbsd:exit_lwps+0x205
sys/kern/kern_exit.c:633
[ 459.9946555] exit1() at netbsd:exit1+0x725 sys/kern/kern_exit.c:221
[ 460.0447664] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.0594104] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.0648004] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.0648004] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.0755536] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.0755536] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.0864517] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.0864517] WARNING: SPL NOsT yLs_OeWExRiEtD() O Nat TRAP EXIT 6 0
[ 460.0980935] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.0980935] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1088061] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[[ 4 64060..1010888080616]1 ]W nAeRNtbIsNGd:: sySPsL_ eNxOiTt +L0OxW77E[

460.1088061] RED ON TRAP EXIT 6 0
[ 460.1241057] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1293725] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1349395] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1349395] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1459649] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1459649] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1564413] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1564413] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1666340] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1666340] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1773246] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1773246] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1881098] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1881098] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.1991665] WARNING: SPL NOT LOWERED OsNy sScYaSlCl(AL)L a 0t 1 EXIT
4a987800 6
[ 460.2070947] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.2070947] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.2180025] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.2180025] WARNING: SPL NOT LOWERED OneNt TbRsdA:Ps EyXscITa ll6 +00x
[ 460.[2 146800.02235] 032a64c5
] [ WA4R6N0I.N23G:02 SP6L 4N5O] T- -LO- WEsRyEscD alOlN T(RnAuPmb EerX
I1T) 6-- 0-

[ 460.2412129] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.2474760] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.2474760] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.2585455] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.2585455] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.2694869] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
[ 460.2694869] WARNING: SPL NOT LOWERED ON T7RA7P86 fEXc1IT99 a66 0a
[
460.[26 9446806.92]81 :27
9[6] 4 6WA0.RN28I1NG27: 9S6]PL cNpuOT1 :L EOWnEdR EtDra cONeb
TaRAcPk ..EX.I
[ [4 64060.2.288121277969]6] T f6a ta0l
[
4[6 40.6208.129423798365] ] WbrAReNaIkpNoGi: SnPtL t NraOTp LinOW
EsuREpDer OviNs TorRA mP oEdeXI
[[ 46 406.029.42394833583] 5]T 6tr a0p
[
460[. 429604.3380356]98 1t2]y peWA R1 NcIoNGd:e S0 PrLi pN O0T
xLffOWfEffREffD fO80N2 T1RcAd1P d EcXIsT 06x 80 [
46[0 .436060.9831127]31 4r8f]l aWgAs R0NxI2NG46: ScrPL2 0NOxT7f
L7OffWEfeREdD2f Oa8N iTlReAvPe lEX I0Tx 86 r s0
p
[[ 4 4606.03.132737514618]5 ] 0WAxfRNfIffNG9:f0 1S7PbLc 3NOfT8c L0
O[
[ 44660.0.33227575661515] ]W EcuRErlD wpON 0TxRAffP fEfX9IfT0 016 320
5
[ 4[ 6406.302.3745601155]91 3] 4W8A0 RNpIiNd G3: 2S8P4.L1 N OloT weLsOWt
ERkEstD aOckN 0TxRAfPff f9EfXI0T17 6bc 308
[ 460[. 34406015.39150] 328c600]
Stopped in pid 3284.1 (syz-executor.2) at netbsd:breakpoint+0x5:
leave
?
breakpoint() at netbsd:breakpoint+0x5
db_panic() at netbsd:db_panic+0xf9 sys/ddb/db_panic.c:67
vpanic() at netbsd:vpanic+0x267 sys/kern/subr_prf.c:336
_GLOBAL__sub_D_65535_0_cpu_configure() at
netbsd:_GLOBAL__sub_D_65535_0_cpu_configure
chglwpcnt() at netbsd:chglwpcnt+0x67 sys/kern/kern_uidinfo.c:226
lwp_free() at netbsd:lwp_free+0x10b sys/kern/kern_lwp.c:1210
lwp_wait() at netbsd:lwp_wait+0x13f sys/kern/kern_lwp.c:565
exit_lwps() at netbsd:exit_lwps+0x205 sys/kern/kern_exit.c:633
exit1() at netbsd:exit1+0x725 sys/kern/kern_exit.c:221
sys_exit() at netbsd:sys_exit+0x77 sys/kern/kern_exit.c:179
syscall() at netbsd:syscall+0x3ac sy_call sys/sys/syscallvar.h:65 [inline]
syscall() at netbsd:syscall+0x3ac sy_invoke sys/sys/syscallvar.h:94 [inline]
syscall() at netbsd:syscall+0x3ac sys/arch/x86/x86/syscall.c:138
--- syscall (number 1) ---
7786fc199a6a:
ds 0
es 1
fs f3fd
gs 222a
rdi ffff9f000d935458
rsi ffff9f0013253768
rbp ffff9f017bc3f8c0
rbx ffff9f016d8a0000
rdx 2
rcx ffffffff80cd92ab db_panic+0xe5
rax 0
r8 4
r9 ffffffff82891e63 db_onpanic+0x3
r10 1ffffffff05123cc
r11 8000000000
r12 ffff9f016d8b2000
r13 ffffffff81f78ea0 __func__.6051+0x7e0
r14 ffff9f017bc3f950
r15 ffff9f016d8a0058
rip ffffffff8021cd1d breakpoint+0x5
cs 8
rflags 246
rsp ffff9f017bc3f8c0
ss 0
netbsd:breakpoint+0x5: leave
PID LID S CPU FLAGS STRUCT LWP * NAME WAIT
2519 > 1 7 0 0 ffff9f00136a86e0 syz-executor.0
4144 1 2 1 0 ffff9f0013360660 syz-executor.4
4017 4 2 0 0 ffff9f00132e3540 syz-executor.3
4017 3 3 1 80 ffff9f00132eb9a0 syz-executor.3 parked
4017 2 3 1 80 ffff9f0013355640 syz-executor.3 parked
4017 1 2 0 10000000 ffff9f0013411280 syz-executor.3
3284 3 5 1 100000 ffff9f001332b1a0 syz-executor.2
3284 > 1 7 1 10000000 ffff9f0013253480 syz-executor.2
3682 1 2 0 0 ffff9f00134116c0 syz-executor.5
3196 5 2 1 0 ffff9f00132f5580 syz-executor.1
3196 4 3 0 4 ffff9f00130a9ba0 syz-executor.1 vm_map
3196 3 2 0 0 ffff9f00132cd940 syz-executor.1
3196 2 3 0 80 ffff9f001332d600 syz-executor.1 parked
3196 1 2 0 10040000 ffff9f00132948e0 syz-executor.1
3588 1 2 0 0 ffff9f001332fa60 syz-executor.4
2173 1 3 1 80 ffff9f0013324180 syz-executor.1 nanoslp
620 1 3 1 80 ffff9f00132a0900 syz-executor.3 nanoslp
2477 1 3 1 80 ffff9f00132944a0 syz-executor.5 nanoslp
2485 1 3 1 80 ffff9f00133245c0 syz-executor.2 nanoslp
1230 1 2 0 0 ffff9f0013324a00 syz-executor.0
600 11 3 1 80 ffff9f0012a52b80 syz-fuzzer parked
600 10 2 1 0 ffff9f0012a11700 syz-fuzzer
600 9 3 1 80 ffff9f0012a38b60 syz-fuzzer parked
600 8 3 1 80 ffff9f00130a9760 syz-fuzzer parked
600 7 3 0 80 ffff9f00130a9320 syz-fuzzer parked
600 6 3 0 80 ffff9f0011fc76a0 syz-fuzzer parked
600 5 3 0 80 ffff9f0012a11b40 syz-fuzzer parked
600 4 3 1 80 ffff9f0011fc7ae0 syz-fuzzer parked
600 3 3 1 80 ffff9f001204eb00 syz-fuzzer parked
600 2 3 1 80 ffff9f0011fc7260 syz-fuzzer parked
600 1 3 1 80 ffff9f0012a38720 syz-fuzzer parked
371 1 3 1 80 ffff9f0011f5b200 sshd select
505 1 3 0 80 ffff9f0012a52740 getty nanoslp
581 1 3 1 80 ffff9f0011f73680 getty nanoslp
550 1 3 0 80 ffff9f0011f73ac0 getty nanoslp
570 1 3 0 80 ffff9f0011f73240 getty ttyraw
543 1 3 1 80 ffff9f00120c9b20 cron nanoslp
519 1 3 0 80 ffff9f0012a112c0 inetd kqueue
483 1 3 0 80 ffff9f00120c92a0 sshd select
363 1 3 1 80 ffff9f0012a52300 powerd kqueue
342 1 3 1 80 ffff9f0012a382e0 syslogd kqueue
202 1 3 0 80 ffff9f001204e280 dhcpcd kqueue
219 1 3 0 80 ffff9f00120c96e0 dhcpcd kqueue
1 1 3 1 80 ffff9f0011f13620 init wait
0 58 3 0 204 ffff9f0011f5b640 physiod physiod
0 57 3 0 204 ffff9f0011f5e220 pooldrain pooldrain
0 56 3 0 204 ffff9f0011f5eaa0 aiodoned aiodoned
0 55 3 1 200 ffff9f0011f5e660 ioflush syncer
0 54 3 0 200 ffff9f0011f5ba80 pgdaemon pgdaemon
0 51 3 1 200 ffff9f0011f13a60 npfgc-0 npfgccv
0 50 3 0 204 ffff9f0011f131e0 rt_free rt_free
0 49 3 0 204 ffff9f0011dc7a40 unpgc unpgc
0 48 3 0 204 ffff9f0011dc7600 key_timehandler
key_timehandler
0 47 3 1 204 ffff9f0011db8160 icmp6_wqinput/1
icmp6_wqinput
0 46 3 0 204 ffff9f0011db85a0 icmp6_wqinput/0
icmp6_wqinput
0 45 3 1 204 ffff9f0011db89e0 nd6_timer nd6_timer
0 44 3 1 204 ffff9f0011db9180 carp6_wqinput/1
carp6_wqinput
0 43 3 0 204 ffff9f0011db95c0 carp6_wqinput/0
carp6_wqinput
0 42 3 1 204 ffff9f0011db9a00 carp_wqinput/1
carp_wqinput
0 41 3 0 204 ffff9f0011dba1a0 carp_wqinput/0
carp_wqinput
0 40 3 1 204 ffff9f0011dc71c0 icmp_wqinput/1
icmp_wqinput
0 39 3 0 204 ffff9f0011dbaa20 icmp_wqinput/0
icmp_wqinput
0 38 3 0 204 ffff9f000f6ea9c0 rt_timer rt_timer
0 37 3 0 204 ffff9f0011dba5e0 vmem_rehash vmem_rehash
0 27 3 0 204 ffff9f000f6ea580 scsibus0 sccomp
0 26 3 0 200 ffff9f000f6ea140 pms0 pmsreset
0 25 3 1 204 ffff9f000f6b39a0 xcall/1 xcall
0 24 1 1 200 ffff9f000f6b3560 softser/1
0 23 1 1 200 ffff9f000f6b3120 softclk/1
0 22 1 1 200 ffff9f000f6b0980 softbio/1
0 21 1 1 200 ffff9f000f6b0540 softnet/1
0 20 1 1 201 ffff9f000f6b0100 idle/1
0 19 3 0 204 ffff9f000de68960 lnxpwrwq lnxpwrwq
0 18 3 0 204 ffff9f000de68520 lnxlngwq lnxlngwq
0 17 3 0 204 ffff9f000de680e0 lnxsyswq lnxsyswq
0 16 3 0 204 ffff9f000de62940 lnxrcugc lnxrcugc
0 15 3 0 204 ffff9f000de62500 sysmon smtaskq
0 14 3 0 204 ffff9f000de620c0 pmfsuspend pmfsuspend
0 13 3 0 204 ffff9f000de58920 pmfevent pmfevent
0 12 3 0 204 ffff9f000de584e0 sopendfree sopendfr
0 11 3 0 204 ffff9f000de580a0 nfssilly nfssilly
0 10 3 1 200 ffff9f000de4e900 cachegc cachegc
0 9 3 0 204 ffff9f000de4e4c0 vdrain vdrain
0 8 3 0 200 ffff9f000de4e080 modunload mod_unld
0 7 3 0 204 ffff9f000de3f8e0 xcall/0 xcall
0 6 1 0 200 ffff9f000de3f4a0 softser/0
0 5 1 0 200 ffff9f000de3f060 softclk/0
0 4 1 0 200 ffff9f000de3a8c0 softbio/0
0 3 1 0 200 ffff9f000de3a480 softnet/0
0 2 1 0 201 ffff9f000de3a040 idle/0
0 1 3 1 200 ffffffff82959000 swapper uvm
[Locks tracked through LWPs]
Locks held by an LWP (syz-executor.2):
Lock 0 (initialized at fork1)
lock address : 0xffff9f001322dc80 type : sleep/adaptive
initialized : 0xffffffff81114adb
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
current cpu : 1 last held: 1
current lwp : 0xffff9f0013253480 last held: 0xffff9f0013253480
last locked* : 0xffffffff8112603b unlocked : 0xffffffff811251ad
owner field : 0xffff9f0013253480 wait/spin: 0/0

Turnstile chain at 0xffffffff82b70640.
=> No active turnstile for this lock.

Locks held by an LWP (syz-executor.5):
Lock 0 (initialized at uvm_obj_init)
lock address : 0xffff9f000de36fc0 type : sleep/adaptive
initialized : 0xffffffff810c24a3
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 1
current cpu : 1 last held: 0
current lwp : 0xffff9f0013253480 last held: 0xffff9f00134116c0
last locked* : 0xffffffff810a734b unlocked : 0xffffffff810a4148
owner field : 000000000000000000 wait/spin: 0/0

Turnstile chain at 0xffffffff82b708c0.
=> No active turnstile for this lock.
Lock 1 (initialized at pmap_create)
lock address : 0xffff9f0011f1c6e0 type : sleep/adaptive
initialized : 0xffffffff8026ec67
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
current cpu : 1 last held: 0
current lwp : 0xffff9f0013253480 last held: 0xffff9f00134116c0
last locked* : 0xffffffff80271502 unlocked : 0xffffffff80270f5f
owner field : 000000000000000000 wait/spin: 0/0

Turnstile chain at 0xffffffff82b70700.
=> No active turnstile for this lock.

Locks held by an LWP (syz-executor.0):
Lock 0 (initialized at vcache_alloc)
lock address : 0xffff9f001361f738 type : sleep/adaptive
initialized : 0xffffffff8126e3fb
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
current cpu : 1 last held: 0
current lwp : 0xffff9f0013253480 last held: 0xffff9f0013324a00
last locked* : 0xffffffff8129d1d0 unlocked : 0xffffffff8129d203
owner/count : 0xffff9f0013324a00 flags : 0x0000000000000004

Turnstile chain at 0xffffffff82b707b0.
=> No active turnstile for this lock.
Lock 1 (initialized at vcache_alloc)
lock address : 0xffff9f00135595d0 type : sleep/adaptive
initialized : 0xffffffff8126e3fb
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
current cpu : 1 last held: 0
current lwp : 0xffff9f0013253480 last held: 0xffff9f0013324a00
last locked* : 0xffffffff8129d1d0 unlocked : 000000000000000000
owner/count : 0xffff9f0013324a00 flags : 0x0000000000000004

Turnstile chain at 0xffffffff82b708e0.
=> No active turnstile for this lock.


[Locks tracked through CPUs]

PAGE FLAG PQ UOBJECT UANON
0xffff9f0000014180 0048 0000 0x0 0x0
0xffff9f00000141f8 0048 0000 0x0 0x0
0xffff9f0000014270 0048 0000 0x0 0x0
0xffff9f00000142e8 0048 0000 0x0 0x0
0xffff9f0000014360 0048 0000 0x0 0x0
0xffff9f00000143d8 0040 0000 0x0 0x0
0xffff9f0000014450 0048 0000 0x0 0x0
0xffff9f00000144c8 0048 0000 0x0 0x0
0xffff9f0000014540 0040 0000 0x0 0x0
0xffff9f00000145b8 0040 0000 0x0 0x0
0xffff9f0000014630 0040 0000 0x0 0x0
0xffff9f00000146a8 0040 0000 0x0 0x0
0xffff9f0000014720 0040 0000 0x0 0x0
0xffff9f0000014798 0048 0000 0x0 0x0
0xffff9f0000014810 0048 0000 0x0 0x0
0xffff9f0000014888 0040 0000 0x0 0x0
0xffff9f0000014900 0048 0000 0x0 0x0
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0xffff9f00000284f0 0008 0000 0x0 0x0
0xffff9f0000028568 0008 0000 0x0 0x0
0xffff9f00000285e0 0008 0000 0x0 0x0
0xffff9f0000028658 0008 0000

---
This bug 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 bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

Maxime Villard

unread,
Jul 17, 2019, 4:56:15 AM7/17/19
to syzbot, syzkaller-...@googlegroups.com
Mark as invalid, it's an obfuscated duplicate of "assert failed: lwpcnt >= 0".

#syz invalid
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