panic: kernel diagnostic assertion "(pg->pg_flags & (PQ_INACTIVE|PQ_ACTIVE)) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/uWvAmR/NIuvNmG_:p aSgeP.Lc "N,O Tl iLnOeW E1R3E0D9
ON SStYoSpCpeAdLL a t91 1232398232 EXIT 0 a
db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*409992 41320 0 0 0x4000000 0 syz-executor
511237 56813 0 0x2 0 1 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833b4474) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833f108e,ffffffff833e6fa0,51d,ffffffff83424d02) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageactivate(fffffd8008067790) at uvm_pageactivate+0x1e3 sys/uvm/uvm_page.c:1306
uvm_fault_lower_lookup(ffff80003c469360,ffff80003c469398,ffff80003c4692e0) at uvm_fault_lower_lookup+0x2a4 sys/uvm/uvm_fault.c:1248
uvm_fault_lower(ffff80003c469360,ffff80003c469398,ffff80003c4692e0) at uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334
uvm_fault(fffffd800f6ad7c0,200000002000,0,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
kpageflttrap(ffff80003c469510,200000002540) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283
kerntrap(ffff80003c469510) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_copyin() at _copyin+0x5b
sys_pwritev(ffff8000363dd780,ffff80003c469840,ffff80003c469790) at sys_pwritev+0x67 sys/kern/vfs_syscalls.c:3387
syscall(ffff80003c469840) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c469840) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xeed879d28e0, count: 1
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: kernel diagnostic assertion "(pg->pg_flags & (PQ_INACTIVE|PQ_ACTIVE)) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1309
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833b4474) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833f108e,ffffffff833e6fa0,51d,ffffffff83424d02) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageactivate(fffffd8008067790) at uvm_pageactivate+0x1e3 sys/uvm/uvm_page.c:1306
uvm_fault_lower_lookup(ffff80003c469360,ffff80003c469398,ffff80003c4692e0) at uvm_fault_lower_lookup+0x2a4 sys/uvm/uvm_fault.c:1248
uvm_fault_lower(ffff80003c469360,ffff80003c469398,ffff80003c4692e0) at uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334
uvm_fault(fffffd800f6ad7c0,200000002000,0,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
kpageflttrap(ffff80003c469510,200000002540) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283
kerntrap(ffff80003c469510) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_copyin() at _copyin+0x5b
sys_pwritev(ffff8000363dd780,ffff80003c469840,ffff80003c469790) at sys_pwritev+0x67 sys/kern/vfs_syscalls.c:3387
syscall(ffff80003c469840) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c469840) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xeed879d28e0, count: -14
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80003c469000
rbx 0xffffffff8389fe07 cpu_info_full_primary+0x2e07
rdx 0
rcx 0xffff8000363dd780
rax 0xffffffff8389eff0 cpu_info_full_primary+0x1ff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0xbc32de1861520de5
r11 0xc49116805f99c1df
r12 0xffffffff8389fc08 cpu_info_full_primary+0x2c08
r13 0
r14 0
r15 0x1
rip 0xffffffff8174fac5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80003c468ff0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor) tid=409992 pid=41320 tcnt=3 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=32, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000337d2d18,0xffffffff838d8230
process=0xffff8000337d7510 user=0xffff80003c464000, vmspace=0xfffffd800f6ad7c0
estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
41320 500611 76516 0 2 0 syz-executor
41320 284695 76516 0 2 0x4000c80 syz-executor
*41320 409992 76516 0 7 0x4000000 syz-executor
44486 305012 20909 0 2 0xc80 syz-executor
44486 40076 20909 0 3 0x4000080 kqread syz-executor
44486 391722 20909 0 3 0x4000080 fsleep syz-executor
14190 158848 10020 0 2 0xc80 syz-executor
14190 195831 10020 0 3 0x4000080 fifor syz-executor
14190 451743 10020 0 3 0x4000080 fsleep syz-executor
14190 228121 10020 0 3 0x4000080 fsleep syz-executor
60590 521820 18547 0 2 0xc80 syz-executor
60590 363857 18547 0 3 0x4000080 sbwait syz-executor
60590 78282 18547 0 3 0x4000080 fsleep syz-executor
82740 100292 69472 0 2 0xc80 syz-executor
82740 375871 69472 0 3 0x4000080 kqsel syz-executor
82740 493849 69472 0 3 0x4000080 fsleep syz-executor
93499 332527 48055 0 2 0xc80 syz-executor
93499 262402 48055 0 3 0x4000080 piperd syz-executor
93499 498367 48055 0 3 0x4000080 fsleep syz-executor
56813 511237 10350 0 7 0x2 syz-executor
42375 332997 10350 0 2 0xc82 syz-executor
20909 144699 10350 0 2 0xc82 syz-executor
48055 40394 10350 0 2 0xc82 syz-executor
76516 321709 10350 0 2 0xc82 syz-executor
69472 237695 10350 0 2 0xc82 syz-executor
18547 119602 10350 0 2 0xc82 syz-executor
10020 219147 10350 0 2 0xc82 syz-executor
10350 374171 63706 0 3 0x82 kqread syz-executor
63706 10769 35947 0 3 0x10008a sigsusp ksh
35947 28258 58977 0 3 0x98 kqread sshd-session
58977 405456 53637 0 3 0x92 kqread sshd-session
52573 46728 1 0 3 0x100083 ttyin getty
53637 110234 1 0 3 0x88 kqread sshd
19486 47847 90048 74 3 0x1100092 bpf pflogd
90048 27860 1 0 3 0x80 sbwait pflogd
3390 436213 62693 73 3 0x1100090 kqread syslogd
62693 64599 1 0 3 0x100082 sbwait syslogd
80282 455123 1 0 3 0x100080 kqread resolvd
48782 376855 34201 77 3 0x100092 kqread dhcpleased
82727 498832 34201 77 3 0x100092 kqread dhcpleased
34201 87308 1 0 3 0x80 kqread dhcpleased
19500 382637 0 0 3 0x14200 bored smr
22240 381972 0 0 2 0x14200 zerothread
72701 141733 0 0 3 0x14200 aiodoned aiodoned
44097 333886 0 0 3 0x14200 syncer update
69193 326112 0 0 3 0x14200 cleaner cleaner
26747 15090 0 0 2 0x14200 reaper
87973 462158 0 0 3 0x14200 pgdaemon pagedaemon
57371 242286 0 0 3 0x14200 bored viomb
27288 67953 0 0 3 0x40014200 acpi0 acpi0
75892 394189 0 0 3 0x40014200 idle1
46134 81855 0 0 3 0x14200 bored softnet1
5279 50428 0 0 3 0x14200 bored softnet0
7658 441000 0 0 3 0x14200 bored systqmp
15909 364070 0 0 3 0x14200 bored systq
90507 232840 0 0 3 0x14200 tmoslp softclockmp
95235 356086 0 0 3 0x40014200 tmoslp softclock
93630 43408 0 0 3 0x40014200 idle0
1 423711 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 41320 (syz-executor) thread 0xffff8000363dd780 (409992)
shared rwlock uobjlk r = 0 (0xfffffd8069ad7400)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1204
#3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334
#4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
#5 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283
#6 kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520
#7 alltraps_kern_meltdown+0x7b
#8 _copyin+0x5b
#9 sys_pwritev+0x67 sys/kern/vfs_syscalls.c:3387
#10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
#11 Xsyscall+0x128
shared rwlock vmmaplk r = 0 (0xfffffd800f6ad8c0)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880
#3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#5 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283
#6 kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520
#7 alltraps_kern_meltdown+0x7b
#8 _copyin+0x5b
#9 sys_pwritev+0x67 sys/kern/vfs_syscalls.c:3387
#10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
#11 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10201 11153K 11194K 166960K 11321 0
pcb 17 12K 12K 166960K 30 0
rtable 237 6K 7K 166960K 352 0
pf 35 17K 18K 166960K 48 0
ifaddr 43 7K 7K 166960K 46 0
ifgroup 55 2K 2K 166960K 57 0
sysctl 1 1K 9K 166960K 5 0
counters 70 37K 37K 166960K 72 0
ioctlops 0 0K 4K 166960K 1491 0
iov 0 0K 12K 166960K 3 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1344 84K 85K 166960K 1384 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 3 0
VM map 2 1K 1K 166960K 2 0
sem 2 0K 0K 166960K 2 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 93K 166960K 155 0
proc 70 115K 147K 166960K 531 0
subproc 72 4K 4K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
in_multi 99 7K 7K 166960K 99 0
ether_multi 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 49 228K 228K 166960K 49 0
exec 0 0K 1K 166960K 373 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 255 156K 161K 166960K 3172 0
UVM aobj 5 2K 2K 166960K 5 0
pinsyscall 42 84K 108K 166960K 1279 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
NDP 28 2K 2K 166960K 29 0
temp 38 8666K 8730K 166960K 4774 0
kqueue 16 26K 26K 166960K 25 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 36 0 33 1 0 1 1 0 8 0
rtentry 176 111 0 1 5 0 5 5 0 8 0
unpcb 144 52 0 29 1 0 1 1 0 8 0
syncache 336 3 0 3 1 0 1 1 0 8 1
tcpcb 736 13 0 9 1 0 1 1 0 8 0
arp 136 18 0 0 1 0 1 1 0 8 0
inpcb 328 82 0 71 2 0 2 2 0 8 1
nd6 152 24 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1192 1 0 1 1 0 1 1 0 8 1
pfstscr 40 1 0 0 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 19 0 0 1 0 1 1 0 8 0
pfstkey 128 19 0 0 1 0 1 1 0 8 0
pfstate 448 18 0 0 2 0 2 2 0 8 0
pfrule 1344 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 453 0 0 29 0 29 29 0 8 0
art_table 40 454 0 0 5 0 5 5 0 8 0
art_node 32 111 0 11 1 0 1 1 0 8 0
shmpl 112 2 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1606 0 87 96 0 96 96 0 8 0
ffsino 296 1606 0 87 118 0 118 118 0 8 0
nchpl 144 1823 0 112 64 0 64 64 0 8 0
vnodes 216 1702 0 0 95 0 95 95 0 8 0
namei 1024 5525 0 5525 1 0 1 1 0 8 1
percpumem 16 51 0 1 1 0 1 1 0 8 0
kstatmem 264 28 0 2 2 0 2 2 0 8 0
scxspl 216 5955 0 5955 3 1 2 2 1 8 2
plimitpl 152 32 0 13 1 0 1 1 0 8 0
sigapl 424 463 0 415 7 0 7 7 0 8 1
knotepl 120 64 0 0 2 0 2 2 0 8 0
kqueuepl 224 25 0 11 1 0 1 1 0 8 0
pipepl 344 121 0 93 3 0 3 3 0 8 0
fdescpl 528 447 0 416 3 0 3 3 0 8 0
filepl 160 1615 0 1379 11 0 11 11 0 8 0
lockfpl 104 11 0 8 1 0 1 1 0 8 0
lockfspl 48 7 0 4 1 0 1 1 0 8 0
sessionpl 144 22 0 13 1 0 1 1 0 8 0
pgrppl 48 31 0 14 1 0 1 1 0 8 0
ucredpl 104 141 0 127 1 0 1 1 0 8 0
zombiepl 144 417 0 415 1 0 1 1 0 8 0
processpl 1232 463 0 415 5 0 5 5 0 8 0
procpl 664 513 0 452 6 0 6 6 0 8 0
sockpl 752 170 0 132 5 0 5 5 0 8 0
mcl64k 65536 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 109 0 0 14 0 14 14 0 8 0
mcl2k 2048 25 0 0 4 0 4 4 0 8 0
mtagpl 96 1 0 0 1 0 1 1 0 8 0
mbufpl 256 154 0 0 10 0 10 10 0 8 0
bufpl 280 2348 0 130 159 0 159 159 0 8 0
anonpl 32 5477 0 0 45 0 45 45 0 246 0
amapchunkpl 152 9178 0 8532 32 0 32 32 0 158 4
amappl16 200 2017 0 2000 5 0 5 5 0 8 3
amappl15 192 9 0 8 1 0 1 1 0 8 0
amappl14 184 51 0 51 1 0 1 1 0 8 1
amappl13 176 442 0 441 1 0 1 1 0 8 0
amappl12 168 868 0 824 3 0 3 3 0 8 0
amappl11 160 6 0 6 1 0 1 1 0 8 1
amappl10 152 47 0 33 1 0 1 1 0 8 0
amappl9 144 249 0 249 1 0 1 1 0 8 1
amappl8 136 25 0 23 1 0 1 1 0 8 0
amappl7 128 80 0 79 1 0 1 1 0 8 0
amappl6 120 281 0 268 1 0 1 1 0 8 0
amappl5 112 74 0 64 1 0 1 1 0 8 0
amappl4 104 409 0 380 1 0 1 1 0 8 0
amappl3 96 1469 0 1356 5 1 4 4 0 8 1
amappl2 88 520 0 464 2 0 2 2 0 8 0
amappl1 80 9219 0 8628 15 0 15 15 0 8 1
amappl 88 2447 0 2269 5 0 5 5 0 92 0
uvmvnodes 80 99 0 0 3 0 3 3 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 4 0 0 1 0 1 1 0 8 0
uaddrrnd 24 447 0 416 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 447 0 416 1 0 1 1 0 8 0
vmmpekpl 168 5484 0 5446 2 0 2 2 0 8 0
vmmpepl 168 36862 0 34953 87 0 87 87 0 357 1
vmsppl 488 446 0 415 5 0 5 5 0 8 0
rwobjpl 80 13788 0 12765 25 1 24 24 0 8 1
pdppl 4096 901 0 830 97 12 85 85 0 8 14
pvpl 32 11508 0 0 93 0 93 93 0 265 0
pmappl 256 446 0 415 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 267 0 14 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833b4474) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833f108e,ffffffff833e6fa0,51d,ffffffff83424d02) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageactivate(fffffd8008067790) at uvm_pageactivate+0x1e3 sys/uvm/uvm_page.c:1306
uvm_fault_lower_lookup(ffff80003c469360,ffff80003c469398,ffff80003c4692e0) at uvm_fault_lower_lookup+0x2a4 sys/uvm/uvm_fault.c:1248
uvm_fault_lower(ffff80003c469360,ffff80003c469398,ffff80003c4692e0) at uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334
uvm_fault(fffffd800f6ad7c0,200000002000,0,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
kpageflttrap(ffff80003c469510,200000002540) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283
kerntrap(ffff80003c469510) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_copyin() at _copyin+0x5b
sys_pwritev(ffff8000363dd780,ffff80003c469840,ffff80003c469790) at sys_pwritev+0x67 sys/kern/vfs_syscalls.c:3387
syscall(ffff80003c469840) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c469840) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xeed879d28e0, count: -14
ddb{0}> machine ddbcpu 1