login: panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f203200+16 0x0!=0xa3d38739ca8f55c0
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*117407 30019 0 0 0 0K syz-executor.0
436636 66606 0 0x14000 0x200 1 zerothread
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82624688) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1789 [inline]
pool_cache_get(ffffffff82624688) at pool_cache_get+0x323 sys/kern/subr_pool.c:1892
pool_get() at pool_get+0x91 sys/kern/subr_pool.c:572
m_get(2,3) at m_get+0x4c sys/kern/uipc_mbuf.c:250
rt_ifa_del(ffff800000a92400,800100,ffff800000a92458,0) at rt_ifa_del+0x79 sys/net/route.c:1163
in_ioctl_sifaddr(8020690c,ffff800020b5fa00,ffff800000a68000,1) at in_ioctl_sifaddr+0x192 in_remove_prefix sys/netinet/in.c:738 [inline]
in_ioctl_sifaddr(8020690c,ffff800020b5fa00,ffff800000a68000,1) at in_ioctl_sifaddr+0x192 in_ifscrub sys/netinet/in.c:562 [inline]
in_ioctl_sifaddr(8020690c,ffff800020b5fa00,ffff800000a68000,1) at in_ioctl_sifaddr+0x192 sys/netinet/in.c:359
in_ioctl(8020690c,ffff800020b5fa00,ffff800000a68000,1) at in_ioctl+0x1e7 sys/netinet/in.c:231
ifioctl(fffffd806e97dc08,8020690c,ffff800020b5fa00,ffff800020abf650) at ifioctl+0xb64 sys/net/if.c:2202
sys_ioctl(ffff800020abf650,ffff800020b5fb18,ffff800020b5fb60) at sys_ioctl+0x5b9
syscall(ffff800020b5fbe0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020b5fbe0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,ffffffffffffff36,0,3,25189b8b010) at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffc7280, 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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f203200+16 0x0!=0xa3d38739ca8f55c0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82624688) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1789 [inline]
pool_cache_get(ffffffff82624688) at pool_cache_get+0x323 sys/kern/subr_pool.c:1892
pool_get() at pool_get+0x91 sys/kern/subr_pool.c:572
m_get(2,3) at m_get+0x4c sys/kern/uipc_mbuf.c:250
rt_ifa_del(ffff800000a92400,800100,ffff800000a92458,0) at rt_ifa_del+0x79 sys/net/route.c:1163
in_ioctl_sifaddr(8020690c,ffff800020b5fa00,ffff800000a68000,1) at in_ioctl_sifaddr+0x192 in_remove_prefix sys/netinet/in.c:738 [inline]
in_ioctl_sifaddr(8020690c,ffff800020b5fa00,ffff800000a68000,1) at in_ioctl_sifaddr+0x192 in_ifscrub sys/netinet/in.c:562 [inline]
in_ioctl_sifaddr(8020690c,ffff800020b5fa00,ffff800000a68000,1) at in_ioctl_sifaddr+0x192 sys/netinet/in.c:359
in_ioctl(8020690c,ffff800020b5fa00,ffff800000a68000,1) at in_ioctl+0x1e7 sys/netinet/in.c:231
ifioctl(fffffd806e97dc08,8020690c,ffff800020b5fa00,ffff800020abf650) at ifioctl+0xb64 sys/net/if.c:2202
sys_ioctl(ffff800020abf650,ffff800020b5fb18,ffff800020b5fb60) at sys_ioctl+0x5b9
syscall(ffff800020b5fbe0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020b5fbe0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,ffffffffffffff36,0,3,25189b8b010) at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffc7280, count: -12
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800020b5f4b0
rbx 0xffff800020b5f560
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffffffff819b183f kprintf+0x16f
r9 0x1
r10 0x227c3012a89f869b
r11 0x4a2c16fef9a4ba2f
r12 0x3000000008
r13 0xffff800020b5f4c0
r14 0x100
r15 0x1
rip 0xffffffff8195ee38 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020b5f4a0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.0) pid=117407 stat=onproc
flags process=0 proc=0
pri=50, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff800020abf8c8,0xffffffff8265bb30
process=0xffff800020adc380 user=0xffff800020b5a000, vmspace=0xfffffd807f00b730
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*30019 117407 97149 0 7 0 syz-executor.0
97149 370765 97637 0 3 0x82 nanosleep syz-executor.0
97637 187212 1531 0 3 0x82 thrsleep syz-execprog
97637 166304 1531 0 3 0x4000082 nanosleep syz-execprog
97637 289893 1531 0 3 0x4000082 thrsleep syz-execprog
97637 521246 1531 0 3 0x4000082 thrsleep syz-execprog
97637 382467 1531 0 3 0x4000082 thrsleep syz-execprog
97637 166437 1531 0 3 0x4000082 thrsleep syz-execprog
97637 279762 1531 0 3 0x4000082 thrsleep syz-execprog
97637 512890 1531 0 3 0x4000082 nanosleep syz-execprog
97637 139529 1531 0 3 0x4000082 kqread syz-execprog
1531 2350 63782 0 3 0x10008a pause ksh
63782 88379 90105 0 3 0x92 select sshd
37455 121728 1 0 3 0x100083 ttyin getty
90105 484090 1 0 3 0x80 select sshd
66876 200702 70355 74 3 0x100092 bpf pflogd
70355 520872 1 0 3 0x80 netio pflogd
8612 99778 29908 73 3 0x100090 kqread syslogd
29908 138636 1 0 3 0x100082 netio syslogd
67370 84544 1 77 3 0x100090 poll dhclient
90856 7548 1 0 3 0x80 poll dhclient
66606 436636 0 0 7 0x14200 zerothread
94955 303282 0 0 3 0x14200 aiodoned aiodoned
80584 506105 0 0 3 0x14200 syncer update
62945 304798 0 0 3 0x14200 cleaner cleaner
17268 471267 0 0 3 0x14200 reaper reaper
19469 254963 0 0 3 0x14200 pgdaemon pagedaemon
46297 447110 0 0 3 0x14200 bored crynlk
55901 477784 0 0 3 0x14200 bored crypto
93787 463827 0 0 3 0x40014200 acpi0 acpi0
28552 508454 0 0 3 0x40014200 idle1
20967 480764 0 0 3 0x14200 bored softnet
63807 307762 0 0 3 0x14200 bored systqmp
19522 373346 0 0 3 0x14200 bored systq
39299 249518 0 0 3 0x40014200 bored softclock
36572 145400 0 0 3 0x40014200 idle0
43600 334759 0 0 3 0x14200 bored smr
1 272120 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 30019 (syz-executor.0) thread 0xffff800020abf650 (117407)
exclusive rwlock netlock r = 0 (0xffffffff82478e48)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 in_ioctl_sifaddr+0x69
#2 in_ioctl+0x1e7 sys/netinet/in.c:231
#3 ifioctl+0xb64 sys/net/if.c:2202
#4 sys_ioctl+0x5b9
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#6 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8263e9d8)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline]
#1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555
#2 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9457 6385K 6385K 78643K 10544 0 0
pcb 13 8K 8K 78643K 13 0 0
rtable 77 2K 2K 78643K 165 0 0
ifaddr 33 9K 9K 78643K 81 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1468 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1181 74K 74K 78643K 1186 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 1K 78643K 2 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 2 0K 0K 78643K 2 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 3 8K 12K 78643K 66 0 0
proc 59 63K 83K 78643K 384 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
in_multi 22 1K 1K 78643K 22 0 0
ether_multi 1 0K 0K 78643K 1 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 18 79K 79K 78643K 18 0 0
exec 0 0K 1K 78643K 199 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 73 12K 12K 78643K 1005 0 0
UVM aobj 2 2K 2K 78643K 2 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
NDP 5 0K 0K 78643K 7 0 0
temp 48 3546K 3610K 78643K 3433 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 4 0 1 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 17 0 15 1 0 1 1 0 8 0
rtentry 112 34 0 4 1 0 1 1 0 8 0
unpcb 120 29 0 19 1 0 1 1 0 8 0
syncache 264 5 0 5 2 1 1 1 0 8 1
tcpcb 544 8 0 5 1 0 1 1 0 8 0
inpcb 280 82 0 75 1 0 1 1 0 8 0
nd6 48 2 0 0 1 0 1 1 0 8 0
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 11 0 0 1 0 1 1 0 8 0
pfstkey 112 11 0 0 1 0 1 1 0 8 0
pfstate 328 11 0 0 1 0 1 1 0 8 0
pfrule 1360 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 256 167 0 2 11 0 11 11 0 8 0
art_table 32 168 0 2 2 0 2 2 0 8 0
art_node 16 33 0 6 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 1470 0 68 46 0 46 46 0 8 0
ffsino 272 1470 0 68 94 0 94 94 0 8 0
nchpl 144 1757 0 146 60 0 60 60 0 8 0
uvmvnodes 72 1480 0 0 27 0 27 27 0 8 0
vnodes 208 1480 0 0 78 0 78 78 0 8 0
namei 1024 4334 0 4334 2 1 1 1 0 8 1
percpumem 16 30 0 0 1 0 1 1 0 8 0
scxspl 192 4554 0 4554 8 1 7 7 0 8 7
plimitpl 152 15 0 8 1 0 1 1 0 8 0
sigapl 432 274 0 260 2 0 2 2 0 8 0
knotepl 112 39 0 28 1 0 1 1 0 8 0
kqueuepl 104 2 0 0 1 0 1 1 0 8 0
pipepl 112 154 0 141 2 1 1 1 0 8 0
fdescpl 488 275 0 260 3 0 3 3 0 8 0
filepl 152 1217 0 1158 3 0 3 3 0 8 0
lockfpl 104 5 0 4 1 0 1 1 0 8 0
lockfspl 48 3 0 2 1 0 1 1 0 8 0
sessionpl 112 19 0 9 1 0 1 1 0 8 0
pgrppl 48 19 0 9 1 0 1 1 0 8 0
ucredpl 96 52 0 43 1 0 1 1 0 8 0
zombiepl 144 260 0 260 2 1 1 1 0 8 1
processpl 896 290 0 260 4 0 4 4 0 8 0
procpl 632 298 0 260 4 0 4 4 0 8 0
sockpl 384 128 0 109 2 0 2 2 0 8 0
mcl4k 4096 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 73 0 0 10 0 10 10 0 8 1
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 102 0 0 6 0 6 6 0 8 0
mbufpl: pool(0xffffffff82624688:mbufpl): free list modified: page 0xfffffd806d737000; item ordinal 0; addr 0xfffffd806d737600 (p 0xfffffd806d89d000); offset 0x0=0x0
pool(mbufpl): free list modified: page 0xfffffd806d737000; item ordinal 0; addr 0xfffffd806d737600 (p 0xfffffd806d89d000); offset 0x0=0x0
mbufpl: pool(0xffffffff82624688:mbufpl): page inconsistency: page 0xfffffd806d737000; item ordinal 1; addr 0x156ebcb75fa1cf1c
bufpl 256 5935 0 1315 289 0 289 289 0 8 0
anonpl 16 23447 0 21619 15 2 13 13 0 124 5
amapchunkpl 152 815 0 747 5 0 5 5 0 158 1
amappl16 192 352 0 301 3 0 3 3 0 8 0
amappl15 184 2 0 1 1 0 1 1 0 8 0
amappl14 176 27 0 23 2 1 1 1 0 8 0
amappl12 160 51 0 49 2 1 1 1 0 8 0
amappl11 152 47 0 32 1 0 1 1 0 8 0
amappl10 144 11 0 8 1 0 1 1 0 8 0
amappl9 136 459 0 454 1 0 1 1 0 8 0
amappl8 128 126 0 116 1 0 1 1 0 8 0
amappl7 120 32 0 29 1 0 1 1 0 8 0
amappl6 112 75 0 67 1 0 1 1 0 8 0
amappl5 104 177 0 161 1 0 1 1 0 8 0
amappl4 96 499 0 471 1 0 1 1 0 8 0
amappl3 88 166 0 158 1 0 1 1 0 8 0
amappl2 80 1050 0 986 4 1 3 3 0 8 1
amappl1 72 15696 0 15270 25 7 18 20 0 8 8
amappl 80 527 0 497 1 0 1 1 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 17 0 17 1 1 0 1 0 8 0
aobjpl 64 1 0 0 1 0 1 1 0 8 0
uaddrrnd 24 275 0 260 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 275 0 260 1 0 1 1 0 8 0
vmmpekpl 168 6506 0 6482 2 0 2 2 0 8 0
vmmpepl 168 34732 0 33747 88 8 80 80 0 357 37
vmsppl 368 274 0 260 2 0 2 2 0 8 0
pdppl 4096 557 0 520 6 0 6 6 0 8 1
pvpl 32 117544 0 113287 118 3 115 115 0 265 80
pmappl 232 274 0 260 1 0 1 1 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 430 0 4 13 0 13 13 0 8 0