panic: pool_do_get: art_heap4 free list modified: page 0xfffffd8050e47000; item addr 0xfffffd8050e47000; offset 0x0=0x0 != 0x5852b347ed71b04f
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*160838 54516 0 0 0x4000000 0 syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8221a365) at panic+0x15c sys/kern/subr_prf.c:207
pool_do_get(ffffffff82540ae0,a,ffff80001e45d4e8) at pool_do_get+0x42a sys/kern/subr_pool.c:746
pool_get(ffffffff82540ae0,a) at pool_get+0xb5 sys/kern/subr_pool.c:581
art_table_get(ffff800000a07a80,fffffd805e2c1ee0,10) at art_table_get+0x12e sys/net/art.c:722
art_insert(ffff800000a07a80,fffffd805e2c2b60,ffff800000025254,20) at art_insert+0x155 sys/net/art.c:387
rtable_insert(6,ffff800000025250,0,ffff8000009e85e0,1,fffffd8054c89a88) at rtable_insert+0x2b4 sys/net/rtable.c:554
rtrequest(1,ffff80001e45d808,1,ffff80001e45d8d8,6) at rtrequest+0x8be sys/net/route.c:941
rt_ifa_add(ffff800000a27400,240404,ffff800000a27440,6) at rt_ifa_add+0x290 sys/net/route.c:1133
rt_ifa_addlocal(ffff800000a27400) at rt_ifa_addlocal+0x149 sys/net/route.c:1242
in6_update_ifa(ffff8000009e6800,ffff80001e45dcd0,0) at in6_update_ifa+0x13bb sys/netinet6/in6.c:723
in6_ioctl_change_ifaddr(8080691a,ffff80001e45dcd0,ffff8000009e6800) at in6_ioctl_change_ifaddr+0x40c sys/netinet6/in6.c:352
ifioctl(fffffd805d8ecd88,8080691a,ffff80001e45dcd0,ffff80001e447650) at ifioctl+0xe60 sys/net/if.c:2291
sys_ioctl(ffff80001e447650,ffff80001e45dde8,ffff80001e45de30) at sys_ioctl+0x5b9
end trace frame: 0xffff80001e45dea0, count: 0
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
pool_do_get: art_heap4 free list modified: page 0xfffffd8050e47000; item addr 0xfffffd8050e47000; offset 0x0=0x0 != 0x5852b347ed71b04f
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8221a365) at panic+0x15c sys/kern/subr_prf.c:207
pool_do_get(ffffffff82540ae0,a,ffff80001e45d4e8) at pool_do_get+0x42a sys/kern/subr_pool.c:746
pool_get(ffffffff82540ae0,a) at pool_get+0xb5 sys/kern/subr_pool.c:581
art_table_get(ffff800000a07a80,fffffd805e2c1ee0,10) at art_table_get+0x12e sys/net/art.c:722
art_insert(ffff800000a07a80,fffffd805e2c2b60,ffff800000025254,20) at art_insert+0x155 sys/net/art.c:387
rtable_insert(6,ffff800000025250,0,ffff8000009e85e0,1,fffffd8054c89a88) at rtable_insert+0x2b4 sys/net/rtable.c:554
rtrequest(1,ffff80001e45d808,1,ffff80001e45d8d8,6) at rtrequest+0x8be sys/net/route.c:941
rt_ifa_add(ffff800000a27400,240404,ffff800000a27440,6) at rt_ifa_add+0x290 sys/net/route.c:1133
rt_ifa_addlocal(ffff800000a27400) at rt_ifa_addlocal+0x149 sys/net/route.c:1242
in6_update_ifa(ffff8000009e6800,ffff80001e45dcd0,0) at in6_update_ifa+0x13bb sys/netinet6/in6.c:723
in6_ioctl_change_ifaddr(8080691a,ffff80001e45dcd0,ffff8000009e6800) at in6_ioctl_change_ifaddr+0x40c sys/netinet6/in6.c:352
ifioctl(fffffd805d8ecd88,8080691a,ffff80001e45dcd0,ffff80001e447650) at ifioctl+0xe60 sys/net/if.c:2291
sys_ioctl(ffff80001e447650,ffff80001e45dde8,ffff80001e45de30) at sys_ioctl+0x5b9
syscall(ffff80001e45deb0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc89f57eb60, count: -16
ddb> show registers
rdi 0xffffffff82063a77 db_enter+0x17
rsi 0x4a12 __ALIGN_SIZE+0x3a12
rbp 0xffff80001e45d350
rbx 0xffff80001e45d400
rdx 0x4a13 __ALIGN_SIZE+0x3a13
rcx 0xffff80001d413000
rax 0xffff80001d413000
r8 0xffff80001e45d310
r9 0x1
r10 0xffff8000009e75c0
r11 0x6ccaab48d1323b0d
r12 0x3000000008
r13 0xffff80001e45d360
r14 0x100
r15 0x1
rip 0xffffffff82063a78 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80001e45d340
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.0) pid=160838 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=72, usrpri=72, nice=20
forw=0xffffffffffffffff, list=0xffff80001e4469f8,0xffffffff8254da30
process=0xffff8000ffff6378 user=0xffff80001e458000, vmspace=0xfffffd8052fb7998
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
54516 396563 21578 0 2 0 syz-executor.0
*54516 160838 21578 0 7 0x4000000 syz-executor.0
93409 211539 0 0 3 0x14200 bored sosplice
20107 228836 76824 0 2 0x2 syz-executor.1
21578 359878 76824 0 3 0x82 nanosleep syz-executor.0
76824 287292 59015 0 3 0x82 thrsleep syz-fuzzer
76824 393689 59015 0 3 0x4000082 nanosleep syz-fuzzer
76824 334426 59015 0 3 0x4000082 thrsleep syz-fuzzer
76824 268397 59015 0 3 0x4000082 thrsleep syz-fuzzer
76824 33844 59015 0 3 0x4000082 thrsleep syz-fuzzer
76824 339564 59015 0 3 0x4000082 kqread syz-fuzzer
76824 158530 59015 0 3 0x4000082 thrsleep syz-fuzzer
59015 280695 50484 0 3 0x10008a pause ksh
50484 999 71194 0 3 0x92 select sshd
65576 96732 1 0 3 0x100083 ttyin getty
71194 327943 1 0 3 0x80 select sshd
11676 421106 72986 73 3 0x100090 kqread syslogd
72986 519615 1 0 3 0x100082 netio syslogd
25941 68987 1 77 3 0x100090 poll dhclient
47911 473622 1 0 3 0x80 poll dhclient
57760 30217 0 0 2 0x14200 zerothread
34731 7479 0 0 3 0x14200 aiodoned aiodoned
12915 184898 0 0 3 0x14200 syncer update
65557 98224 0 0 3 0x14200 cleaner cleaner
4641 295820 0 0 3 0x14200 reaper reaper
28173 410484 0 0 3 0x14200 pgdaemon pagedaemon
43775 429855 0 0 3 0x14200 bored crynlk
32160 407833 0 0 3 0x14200 bored crypto
41612 57382 0 0 3 0x40014200 acpi0 acpi0
66545 215125 0 0 3 0x14200 bored softnet
20211 400451 0 0 3 0x14200 bored systqmp
79159 356625 0 0 3 0x14200 bored systq
80727 207186 0 0 3 0x40014200 bored softclock
66400 241846 0 0 3 0x40014200 idle0
58435 139567 0 0 3 0x14200 bored smr
1 449104 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9530 6371K 7338K 78643K 11317 0
pcb 13 8K 8K 78643K 81 0
rtable 102 4K 4K 78643K 301 0
ifaddr 102 19K 20K 78643K 154 0
counters 19 16K 16K 78643K 19 0
ioctlops 0 0K 2K 78643K 41 0
iov 0 0K 24K 78643K 84 0
mount 1 1K 1K 78643K 1 0
vnodes 1222 77K 77K 78643K 1468 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 5 0
VM map 2 0K 0K 78643K 2 0
sem 12 0K 0K 78643K 152 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1794 195K 288K 78643K 12646 0
file desc 5 13K 25K 78643K 345 0
sigio 0 0K 0K 78643K 14 0
proc 48 38K 63K 78643K 416 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 27 0
in_multi 98 4K 4K 78643K 141 0
ether_multi 1 0K 0K 78643K 7 0
mrt 0 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 90 397K 397K 78643K 90 0
exec 0 0K 1K 78643K 215 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 128 55K 55K 78643K 1768 0
UVM aobj 40 2K 2K 78643K 40 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 80 0
NDP 15 0K 0K 78643K 25 0
temp 145 3027K 3101K 78643K 20035 0
kqueue 0 0K 0K 78643K 2 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 6 0 2 1 0 1 1 0 8 0
rtpcb 80 61 0 59 1 0 1 1 0 8 0
rtentry 112 55 0 17 2 0 2 2 0 8 0
unpcb 120 241 0 233 1 0 1 1 0 8 0
syncache 264 5 0 5 2 2 0 1 0 8 0
tcpqe 32 1 0 1 1 1 0 1 0 8 0
tcpcb 544 249 0 245 4 1 3 3 0 8 2
ipq 40 5 0 5 2 1 1 1 0 8 1
ipqe 40 225 0 225 2 1 1 1 0 8 1
inpcb 280 570 0 562 5 1 4 4 0 8 3
nd6 48 6 0 4 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 0 1 1 0 8 1
ppxss 1128 3 0 3 2 2 0 1 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 288 0 82 16 1 15 15 0 8 0
art_heap4: pool(0xffffffff82540ae0:art_heap4): free list modified: page 0xfffffd8050e47000; item ordinal 0; addr 0xfffffd8050e47000 (p 0xfffffd8062b9f000); offset 0x0=0x0
pool(art_heap4): free list modified: page 0xfffffd8050e47000; item ordinal 0; addr 0xfffffd8050e47000 (p 0xfffffd8062b9f000); offset 0x0=0x0
art_heap4: pool(0xffffffff82540ae0:art_heap4): page inconsistency: page 0xfffffd8050e47000; item ordinal 1; addr 0xfd1fc5c07e7cbd3a
art_table 32 292 0 82 2 0 2 2 0 8 0
art_node 16 54 0 18 1 0 1 1 0 8 0
sysvmsgpl 40 38 0 16 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 150 0 140 1 0 1 1 0 8 0
shmpl 112 38 0 0 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 1936 0 540 46 0 46 46 0 8 0
ffsino 240 1936 0 540 83 0 83 83 0 8 0
nchpl 144 2652 0 1035 62 1 61 61 0 8 0
uvmvnodes 72 2143 0 0 39 0 39 39 0 8 0
vnodes 208 2143 0 0 113 0 113 113 0 8 0
namei 1024 7874 0 7874 1 0 1 1 0 8 1
vcpupl 1984 6 0 0 1 0 1 1 0 8 0
vmpool 528 6 0 0 1 0 1 1 0 8 0
scxspl 192 7829 0 7829 1 0 1 1 0 8 1
plimitpl 152 39 0 32 1 0 1 1 0 8 0
sigapl 432 516 0 503 2 0 2 2 0 8 0
futexpl 56 11114 0 11114 1 0 1 1 0 8 1
knotepl 112 141 0 122 1 0 1 1 0 8 0
kqueuepl 104 221 0 219 1 0 1 1 0 8 0
pipepl 128 392 0 373 3 1 2 2 0 8 1
fdescpl 424 517 0 503 2 0 2 2 0 8 0
filepl 120 4225 0 4129 6 1 5 5 0 8 2
lockfpl 104 129 0 128 1 0 1 1 0 8 0
lockfspl 48 49 0 48 1 0 1 1 0 8 0
sessionpl 112 17 0 7 1 0 1 1 0 8 0
pgrppl 48 19 0 9 1 0 1 1 0 8 0
ucredpl 96 443 0 436 1 0 1 1 0 8 0
zombiepl 144 505 0 505 1 0 1 1 0 8 1
processpl 872 534 0 505 4 0 4 4 0 8 0
procpl 632 1043 0 1007 4 0 4 4 0 8 0
sosppl 128 2 0 2 1 1 0 1 0 8 0
sockpl 384 884 0 866 8 1 7 7 0 8 5
mcl64k 65536 59 0 59 1 0 1 1 0 8 1
mcl16k 16384 6 0 6 3 2 1 1 0 8 1
mcl12k 12288 9 0 9 1 0 1 1 0 8 1
mcl9k 9216 11 0 11 1 0 1 1 0 8 1
mcl8k 8192 18 0 18 2 1 1 1 0 8 1
mcl4k 4096 47 0 47 1 0 1 1 0 8 1
mcl2k2 2112 1 0 1 1 1 0 1 0 8 0
mcl2k 2048 69249 0 69208 17 11 6 14 0 8 0
mtagpl 80 29 0 6 2 1 1 1 0 8 0
mbufpl 256 112844 0 112715 39 16 23 23 0 8 11
bufpl 280 7347 0 1328 430 0 430 430 0 8 0
anonpl 16 84722 0 64631 97 10 87 96 0 107 3
amapchunkpl 152 2935 0 2755 17 8 9 17 0 158 0
amappl16 192 4034 0 2948 62 4 58 62 0 8 3
amappl15 184 50 0 46 1 0 1 1 0 8 0
amappl14 176 28 0 23 1 0 1 1 0 8 0
amappl13 168 2 0 2 2 2 0 1 0 8 0
amappl12 160 12 0 9 2 1 1 1 0 8 0
amappl11 152 45 0 34 1 0 1 1 0 8 0
amappl10 144 181 0 176 1 0 1 1 0 8 0
amappl9 136 564 0 561 1 0 1 1 0 8 0
amappl8 128 125 0 96 1 0 1 1 0 8 0
amappl7 120 255 0 245 1 0 1 1 0 8 0
amappl6 112 61 0 55 1 0 1 1 0 8 0
amappl5 104 134 0 122 1 0 1 1 0 8 0
amappl4 96 732 0 703 1 0 1 1 0 8 0
amappl3 88 129 0 121 1 0 1 1 0 8 0
amappl2 80 3379 0 3309 3 1 2 3 0 8 0
amappl1 72 19123 0 18692 26 16 10 20 0 8 0
amappl 80 1267 0 1221 2 0 2 2 0 84 0
dma4096 4096 1 0 1 1 1 0 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 64 39 0 0 1 0 1 1 0 8 0
uaddrrnd 24 523 0 503 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 523 0 503 1 0 1 1 0 8 0
vmmpekpl 168 7702 0 7675 2 0 2 2 0 8 0
vmmpepl 168 70286 0 68074 144 39 105 136 0 357 7
vmsppl 272 522 0 503 2 0 2 2 0 8 0
pdppl 4096 1052 0 1012 7 1 6 6 0 8 0
pvpl 32 243970 0 221382 217 9 208 217 0 265 23
pmappl 200 522 0 503 2 0 2 2 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 184 0 35 6 1 5 5 0 8 0