panic: kernel diagnostic assertion "pg->wire_count != 0" failed: file "/syzkaller/managers/main/kernel/sys/uvm/uvm_page.c", line 1207
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*449449 30493 0 0 0x4000000 0 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834c01e5) at panic+0x1cf sys/kern/subr_prf.c:198
__assert(ffffffff834f9c10,ffffffff834df8b9,4b7,ffffffff8344ceb2) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageunwire(fffff2000712b880) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206
uvm_fault_unwire_locked(fffff2006d175b90,200000404000,200000405000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790
uvm_unmap_kill_entry_withlock(fffff2006d175b90,fffff2006d171ad8,1) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866
uvm_unmap_remove(fffff2006d175b90,200000404000,200000405000,ffff80003c8e14c0,0,1,fc2fdc90458125c1) at uvm_unmap_remove+0x6c2 sys/uvm/uvm_map.c:2008
uvm_map(fffff2006d175b90,ffff80003c8e1728,1000,fffff20068558dd0,0,0,5a01ec87f735ff35) at uvm_map+0x87d sys/uvm/uvm_map.c:1052
uvm_mmapfile(fffff2006d175b90,ffff80003c8e1728,1000,1,7,12,22024ebf063fd7ca,7,fffff2006d175b90,12) at uvm_mmapfile+0x40b sys/uvm/uvm_mmap.c:1139
sys_mmap(ffff80002a786fb0,ffff80003c8e1880,ffff80003c8e17d0) at sys_mmap+0xe6a sys/uvm/uvm_mmap.c:396
syscall(ffff80003c8e1880) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c8e1880) at syscall+0x962 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa13753f8a30, count: 3
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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: kernel diagnostic assertion "pg->wire_count != 0" failed: file "/syzkaller/managers/main/kernel/sys/uvm/uvm_page.c", line 1207
ddb> show kasan
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834c01e5) at panic+0x1cf sys/kern/subr_prf.c:198
__assert(ffffffff834f9c10,ffffffff834df8b9,4b7,ffffffff8344ceb2) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageunwire(fffff2000712b880) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206
uvm_fault_unwire_locked(fffff2006d175b90,200000404000,200000405000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790
uvm_unmap_kill_entry_withlock(fffff2006d175b90,fffff2006d171ad8,1) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866
uvm_unmap_remove(fffff2006d175b90,200000404000,200000405000,ffff80003c8e14c0,0,1,fc2fdc90458125c1) at uvm_unmap_remove+0x6c2 sys/uvm/uvm_map.c:2008
uvm_map(fffff2006d175b90,ffff80003c8e1728,1000,fffff20068558dd0,0,0,5a01ec87f735ff35) at uvm_map+0x87d sys/uvm/uvm_map.c:1052
uvm_mmapfile(fffff2006d175b90,ffff80003c8e1728,1000,1,7,12,22024ebf063fd7ca,7,fffff2006d175b90,12) at uvm_mmapfile+0x40b sys/uvm/uvm_mmap.c:1139
sys_mmap(ffff80002a786fb0,ffff80003c8e1880,ffff80003c8e17d0) at sys_mmap+0xe6a sys/uvm/uvm_mmap.c:396
syscall(ffff80003c8e1880) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c8e1880) at syscall+0x962 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa13753f8a30, count: -12
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80003c8e11f0
rbx 0xfffff2006d175b90
rdx 0
rcx 0
rax 0xffff80002a786fb0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x89dae3a403d36eab
r11 0x156e0a617ec65a10
r12 0
r13 0xffffffff8362e650 uvm_map_addr_RBT_INFO
r14 0
r15 0x1
rip 0xffffffff82d67d75 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80003c8e11e0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor) tid=449449 pid=30493 tcnt=3 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=32, usrpri=62, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a787248,0xffff80002a74c2c0
process=0xffff80003a8cdfd0 user=0xffff80003c8dc000, vmspace=0xfffff2006d175b90
estcpu=12, cpticks=5, pctcpu=0.2, user=0, sys=5, intr=0
ddb> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
83697 33264 55007 0 3 0x1000 0x2000 suspend syz-executor
83697 421197 55007 0 2 0x1000 0x4080000 syz-executor
83697 190771 55007 0 3 0x1000 0x4080000 inode syz-executor
30493 159922 6596 0 2 0 0 syz-executor
*30493 449449 6596 0 7 0 0x4000000 syz-executor
30493 507080 6596 0 3 0 0x4000080 fsleep syz-executor
80866 15045 35691 0 3 0x2 0x80 piperd syz-executor
49999 317563 35691 0 3 0x2 0x80 piperd syz-executor
6596 64586 35691 0 3 0x2 0x80 nanoslp syz-executor
65885 274643 35691 0 3 0x2 0x80 wait syz-executor
57407 393345 35691 0 3 0x2 0x80 piperd syz-executor
55007 469577 35691 0 3 0x2 0x80 nanoslp syz-executor
35691 291742 75244 0 3 0x2 0x80 wait syz-executor
75244 517614 72203 0 3 0x100002 0x88 sigsusp ksh
72203 386645 59329 0 3 0x10 0x88 kqread sshd-session
59329 201540 85277 0 3 0x12 0x80 kqread sshd-session
22197 498447 1 0 3 0x100003 0x80 ttyin getty
85277 226092 1 0 3 0 0x88 kqread sshd
16982 219360 79983 73 3 0x1100010 0x80 kqread syslogd
79983 156629 1 0 3 0x100002 0x80 sbwait syslogd
25749 25081 1 0 3 0x100000 0x80 kqread resolvd
37393 520436 64826 77 3 0x100012 0x80 kqread dhcpleased
16352 179735 64826 77 3 0x100012 0x80 kqread dhcpleased
64826 437495 1 0 3 0 0x80 kqread dhcpleased
70442 108276 0 0 3 0x14000 0x200 bored smr
13287 6006 0 0 2 0x14000 0x200 zerothread
41368 470864 0 0 3 0x14000 0x200 aiodoned aiodoned
41277 321355 0 0 3 0x14000 0x200 syncer update
30649 242593 0 0 3 0x14000 0x200 cleaner cleaner
18368 99258 0 0 3 0x14000 0x200 reaper reaper
87538 257923 0 0 3 0x14000 0x200 pgdaemon pagedaemon
59254 152101 0 0 3 0x14000 0x200 bored viomb
94184 161393 0 0 3 0x14000 0x40000200 acpi0 acpi0
54201 205683 0 0 3 0x14000 0x200 bored softnet0
18004 117613 0 0 3 0x14000 0x200 smrbar systqmp
43308 11572 0 0 3 0x14000 0x200 bored systq
79425 84523 0 0 3 0x14000 0x40000200 tmoslp softclock
62422 175469 0 0 3 0x14000 0x40000200 idle0
1 151571 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11046 12099K 12319K 166960K 12240 0
pcb 17 14K 16K 166960K 108 0
rtable 179 5K 6K 166960K 584 0
pf 25 12K 12K 166960K 48 0
ifaddr 31 5K 7K 166960K 74 0
ifgroup 38 1K 2K 166960K 78 0
sysctl 3 1K 9K 166960K 7 0
counters 30 17K 17K 166960K 40 0
ioctlops 0 0K 4K 166960K 57 0
iov 0 0K 12K 166960K 5 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1323 83K 84K 166960K 1638 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 5 0
VM map 2 1K 1K 166960K 2 0
sem 27 1K 1K 166960K 144 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 13 45K 97K 166960K 329 0
proc 59 59K 124K 166960K 695 0
subproc 72 4K 4K 166960K 135 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 2 0K 0K 166960K 12 0
in_multi 66 4K 6K 166960K 179 0
ether_multi 1 0K 0K 166960K 1 0
mrt 0 0K 0K 166960K 6 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 211 943K 943K 166960K 211 0
exec 0 0K 1K 166960K 457 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 200 151K 160K 166960K 4296 0
UVM aobj 6 2K 4K 166960K 7 0
pinsyscall 34 68K 96K 166960K 1611 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 2 0
NDP 8 0K 2K 166960K 48 0
temp 38 9114K 9178K 166960K 10856 0
kqueue 13 20K 26K 166960K 40 0
SYN cache 2 16K 16K 166960K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 55 0 52 1 0 1 1 0 8 0
rtentry 136 190 0 112 4 0 4 4 0 8 0
unpcb 144 85 0 70 1 0 1 1 0 8 0
syncache 336 6 0 6 1 0 1 1 0 8 1
tcpqe 32 3 0 3 1 0 1 1 0 8 1
tcpcb 736 115 0 106 7 0 7 7 0 8 6
arp 96 33 0 21 1 0 1 1 0 8 0
inpcb 328 315 0 301 13 3 10 13 0 8 8
nd6 112 46 0 31 1 0 1 1 0 8 0
pkpcb 40 1 0 1 1 0 1 1 0 8 1
kcovpl 48 15 0 7 1 0 1 1 0 8 0
pfosfp 40 2 0 1 1 0 1 1 0 8 0
pfosfpen 112 2 0 1 1 0 1 1 0 8 0
pftag 88 1 0 0 1 0 1 1 0 8 0
pfqueue 320 1 0 0 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 765 0 398 32 0 32 32 0 8 8
art_table 40 766 0 398 6 0 6 6 0 8 1
art_node 32 190 0 110 1 0 1 1 0 8 0
sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1
semapl 72 142 0 117 1 0 1 1 0 8 0
shmpl 120 4 0 1 1 0 1 1 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 1862 0 387 93 0 93 93 0 8 0
ffsino 256 1862 0 387 93 0 93 93 0 8 0
nchpl 144 2183 0 469 64 0 64 64 0 8 0
vnodes 216 2072 0 0 116 0 116 116 0 8 0
namei 1024 8653 0 8653 4 0 4 4 0 8 4
kstatmem 264 37 0 20 2 0 2 2 0 8 0
scxspl 216 7610 0 7610 3 0 3 3 1 8 3
plimitpl 152 51 0 34 1 0 1 1 0 8 0
sigapl 424 610 0 572 6 0 6 6 0 8 1
knotepl 120 5403 0 5356 2 0 2 2 0 8 0
kqueuepl 184 51 0 42 1 0 1 1 0 8 0
pipepl 304 149 0 122 3 0 3 3 0 8 0
fdescpl 448 597 0 572 5 0 5 5 0 8 1
filepl 120 2937 0 2723 15 0 15 15 0 8 5
lockfpl 104 49 0 45 1 0 1 1 0 8 0
lockfspl 48 24 0 21 1 0 1 1 0 8 0
sessionpl 144 37 0 29 1 0 1 1 0 8 0
pgrppl 48 52 0 36 1 0 1 1 0 8 0
ucredpl 104 682 0 670 1 0 1 1 0 8 0
zombiepl 144 576 0 572 1 0 1 1 0 8 0
processpl 1160 610 0 572 4 0 4 4 0 8 0
procpl 664 775 0 733 6 0 6 6 0 8 1
sosppl 176 2 0 2 1 0 1 1 0 8 1
sockpl 552 460 0 428 13 2 11 13 0 8 8
mcl64k 65536 1 0 1 1 0 1 1 0 8 1
mcl16k 16384 1 0 1 1 0 1 1 0 8 1
mcl8k 8192 8 0 8 1 0 1 1 0 8 1
mcl4k 4096 2590 0 2535 14 0 14 14 0 8 6
mcl2k 2048 389 0 389 4 0 4 4 0 8 4
mextrefs 64 109 0 109 1 0 1 1 0 8 1
mtagpl 96 4 0 4 1 0 1 1 0 8 1
mbufpl 256 5788 0 5675 17 0 17 17 0 8 2
bufpl 272 2674 0 103 172 0 172 172 0 8 0
anonpl 24 103193 0 95899 44 0 44 44 0 187 0
amapchunkpl 152 12133 0 11602 25 0 25 25 0 158 4
amappl16 200 1441 0 1287 9 0 9 9 0 8 0
amappl15 192 5 0 5 1 0 1 1 0 8 1
amappl14 184 491 0 490 1 0 1 1 0 8 0
amappl13 176 221 0 210 1 0 1 1 0 8 0
amappl12 168 863 0 839 2 0 2 2 0 8 0
amappl11 160 9 0 9 1 0 1 1 0 8 1
amappl10 152 65 0 55 1 0 1 1 0 8 0
amappl9 144 270 0 270 1 0 1 1 0 8 1
amappl8 136 119 0 118 1 0 1 1 0 8 0
amappl7 128 153 0 142 1 0 1 1 0 8 0
amappl6 120 220 0 219 1 0 1 1 0 8 0
amappl5 112 87 0 80 1 0 1 1 0 8 0
amappl4 104 295 0 280 1 0 1 1 0 8 0
amappl3 96 2158 0 2087 3 0 3 3 0 8 0
amappl2 88 682 0 618 2 0 2 2 0 8 0
amappl1 80 11320 0 10784 14 0 14 14 0 8 1
amappl 88 3473 0 3335 5 0 5 5 0 92 1
uvmvnodes 80 102 0 0 3 0 3 3 0 8 0
dma4096 4096 1 0 1 1 0 1 1 0 8 1
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 0 1 1 0 8 1
dma128 128 253 0 253 1 0 1 1 0 8 1
dma64 64 6 0 6 1 0 1 1 0 8 1
dma32 32 9 0 9 1 0 1 1 0 8 1
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 6 0 1 1 0 1 1 0 8 0
uaddrrnd 24 597 0 572 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 597 0 572 1 0 1 1 0 8 0
vmmpekpl 168 6691 0 6653 2 0 2 2 0 8 0
vmmpepl 168 47571 0 45865 83 0 83 83 0 357 4
vmsppl 368 596 0 572 4 0 4 4 0 8 1
rwobjpl 40 16153 0 15106 11 0 11 11 0 8 0
pdppl 4096 1200 0 1144 98 32 66 82 0 8 10
pvpl 32 270709 0 259016 97 0 97 97 0 265 2
pmappl 216 596 0 572 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 554 0 32 15 0 15 15 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834c01e5) at panic+0x1cf sys/kern/subr_prf.c:198
__assert(ffffffff834f9c10,ffffffff834df8b9,4b7,ffffffff8344ceb2) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageunwire(fffff2000712b880) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206
uvm_fault_unwire_locked(fffff2006d175b90,200000404000,200000405000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790
uvm_unmap_kill_entry_withlock(fffff2006d175b90,fffff2006d171ad8,1) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866
uvm_unmap_remove(fffff2006d175b90,200000404000,200000405000,ffff80003c8e14c0,0,1,fc2fdc90458125c1) at uvm_unmap_remove+0x6c2 sys/uvm/uvm_map.c:2008
uvm_map(fffff2006d175b90,ffff80003c8e1728,1000,fffff20068558dd0,0,0,5a01ec87f735ff35) at uvm_map+0x87d sys/uvm/uvm_map.c:1052
uvm_mmapfile(fffff2006d175b90,ffff80003c8e1728,1000,1,7,12,22024ebf063fd7ca,7,fffff2006d175b90,12) at uvm_mmapfile+0x40b sys/uvm/uvm_mmap.c:1139
sys_mmap(ffff80002a786fb0,ffff80003c8e1880,ffff80003c8e17d0) at sys_mmap+0xe6a sys/uvm/uvm_mmap.c:396
syscall(ffff80003c8e1880) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c8e1880) at syscall+0x962 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa13753f8a30, count: -12
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834c01e5) at panic+0x1cf sys/kern/subr_prf.c:198
__assert(ffffffff834f9c10,ffffffff834df8b9,4b7,ffffffff8344ceb2) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageunwire(fffff2000712b880) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206
uvm_fault_unwire_locked(fffff2006d175b90,200000404000,200000405000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790
uvm_unmap_kill_entry_withlock(fffff2006d175b90,fffff2006d171ad8,1) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866
uvm_unmap_remove(fffff2006d175b90,200000404000,200000405000,ffff80003c8e14c0,0,1,fc2fdc90458125c1) at uvm_unmap_remove+0x6c2 sys/uvm/uvm_map.c:2008
uvm_map(fffff2006d175b90,ffff80003c8e1728,1000,fffff20068558dd0,0,0,5a01ec87f735ff35) at uvm_map+0x87d sys/uvm/uvm_map.c:1052
uvm_mmapfile(fffff2006d175b90,ffff80003c8e1728,1000,1,7,12,22024ebf063fd7ca,7,fffff2006d175b90,12) at uvm_mmapfile+0x40b sys/uvm/uvm_mmap.c:1139
sys_mmap(ffff80002a786fb0,ffff80003c8e1880,ffff80003c8e17d0) at sys_mmap+0xe6a sys/uvm/uvm_mmap.c:396
syscall(ffff80003c8e1880) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c8e1880) at syscall+0x962 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa13753f8a30, count: -12