panic: kernel diagnostic assertion "TAILQ_EMPTY(&ifp->if_addrhooks)" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if.c", line 1177
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
156338 1680 0 0 0x1 0 dhclient
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff82207767,ffffffff82234f0d,499,ffffffff821f183f) at __assert+0x2b sys/kern/subr_prf.c:154
if_detach(ffff800000aed800) at if_detach+0x618 sys/net/if.c:1178
tun_clone_destroy(ffff800000aed800) at tun_clone_destroy+0x1c7 sys/net/if_tun.c:278
spec_close(ffff80002360d4b0) at spec_close+0x311 sys/kern/spec_vnops.c:555
VOP_CLOSE(fffffd80650e0d08,ce,fffffd807f7c6a80,ffff800020ab0290) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175
vn_closefile(fffffd807046c1e0,ffff800020ab0290) at vn_closefile+0xd8 vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd807046c1e0,ffff800020ab0290) at vn_closefile+0xd8 sys/kern/vfs_vnops.c:610
fdrop(fffffd807046c1e0,ffff800020ab0290) at fdrop+0xc2 sys/kern/kern_descrip.c:1273
closef(fffffd807046c1e0,ffff800020ab0290) at closef+0x11d sys/kern/kern_descrip.c:1257
fdfree(ffff800020ab0290) at fdfree+0x101 sys/kern/kern_descrip.c:1189
exit1(ffff800020ab0290,0,1) at exit1+0x32f sys/kern/kern_exit.c:196
sys_exit(ffff800020ab0290,ffff80002360d740,ffff80002360d790) at sys_exit+0x17 sys/kern/kern_exit.c:94
syscall(ffff80002360d810) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff80002360d810) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
end trace frame: 0xffff80002360d890, 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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
kernel diagnostic assertion "TAILQ_EMPTY(&ifp->if_addrhooks)" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if.c", line 1177
ddb{1}> 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
__assert(ffffffff82207767,ffffffff82234f0d,499,ffffffff821f183f) at __assert+0x2b sys/kern/subr_prf.c:154
if_detach(ffff800000aed800) at if_detach+0x618 sys/net/if.c:1178
tun_clone_destroy(ffff800000aed800) at tun_clone_destroy+0x1c7 sys/net/if_tun.c:278
spec_close(ffff80002360d4b0) at spec_close+0x311 sys/kern/spec_vnops.c:555
VOP_CLOSE(fffffd80650e0d08,ce,fffffd807f7c6a80,ffff800020ab0290) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175
vn_closefile(fffffd807046c1e0,ffff800020ab0290) at vn_closefile+0xd8 vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd807046c1e0,ffff800020ab0290) at vn_closefile+0xd8 sys/kern/vfs_vnops.c:610
fdrop(fffffd807046c1e0,ffff800020ab0290) at fdrop+0xc2 sys/kern/kern_descrip.c:1273
closef(fffffd807046c1e0,ffff800020ab0290) at closef+0x11d sys/kern/kern_descrip.c:1257
fdfree(ffff800020ab0290) at fdfree+0x101 sys/kern/kern_descrip.c:1189
exit1(ffff800020ab0290,0,1) at exit1+0x32f sys/kern/kern_exit.c:196
sys_exit(ffff800020ab0290,ffff80002360d740,ffff80002360d790) at sys_exit+0x17 sys/kern/kern_exit.c:94
syscall(ffff80002360d810) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff80002360d810) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,1,0,1,0,7f7ffffe7694) at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe7660, count: -15
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002360d2b0
rbx 0xffff80002360d360
rdx 0xffff800020ab0290
rcx 0
rax 0
r8 0xffffffff819d4e5f kprintf+0x16f
r9 0x1
r10 0x25
r11 0xa922170da1f5c180
r12 0x3000000008
r13 0xffff80002360d2c0
r14 0x100
r15 0x1
rip 0xffffffff81b2bfb8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002360d2a0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=281864 stat=onproc
flags process=1008<EXITING,SINGLEEXIT> proc=2000<WEXIT>
pri=32, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020ace510,0xffffffff82642758
process=0xffff800020adc000 user=0xffff800023608000, vmspace=0xfffffd807f00b170
estcpu=36, cpticks=8, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
60974 97062 1 0 3 0x100083 ttyin getty
57651 454530 35416 0 3 0x82 nanosleep syz-executor.0
80195 460816 35416 0 3 0x2 biowait syz-executor.1
80802 260813 0 0 3 0x14200 acct acct
84186 38077 0 0 3 0x14200 bored sosplice
35416 65881 62860 0 3 0x82 thrsleep syz-fuzzer
35416 354015 62860 0 3 0x4000082 nanosleep syz-fuzzer
35416 333377 62860 0 3 0x4000082 thrsleep syz-fuzzer
35416 277262 62860 0 3 0x4000082 thrsleep syz-fuzzer
35416 155198 62860 0 3 0x4000082 thrsleep syz-fuzzer
35416 364327 62860 0 3 0x4000082 kqread syz-fuzzer
35416 11699 62860 0 3 0x4000082 thrsleep syz-fuzzer
35416 132086 62860 0 3 0x4000082 thrsleep syz-fuzzer
35416 312915 62860 0 3 0x4000082 nanosleep syz-fuzzer
35416 70560 62860 0 3 0x4000082 thrsleep syz-fuzzer
62860 66613 18506 0 3 0x10008a pause ksh
18506 396500 59830 0 3 0x92 select sshd
59830 100395 1 0 3 0x80 select sshd
26614 406415 36518 74 3 0x100092 bpf pflogd
36518 55228 1 0 3 0x80 netio pflogd
49961 41022 19717 73 3 0x100090 kqread syslogd
19717 406961 1 0 3 0x100082 netio syslogd
12878 75521 1 77 3 0x100090 poll dhclient
1680 156338 1 0 7 0x1 dhclient
28007 433717 0 0 3 0x14200 pgzero zerothread
56670 249586 0 0 3 0x14200 aiodoned aiodoned
23749 388677 0 0 3 0x14200 syncer update
37450 217353 0 0 3 0x14200 cleaner cleaner
56418 184889 0 0 3 0x14200 reaper reaper
74974 348477 0 0 3 0x14200 pgdaemon pagedaemon
46587 348523 0 0 3 0x14200 bored crynlk
33835 202235 0 0 3 0x14200 bored crypto
11811 42062 0 0 3 0x40014200 acpi0 acpi0
48269 113767 0 0 3 0x40014200 idle1
49839 79467 0 0 2 0x14200 softnet
49862 302135 0 0 3 0x14200 bored systqmp
40308 341350 0 0 2 0x14200 systq
31372 320086 0 0 3 0x40014200 bored softclock
43994 160201 0 0 3 0x40014200 idle0
83785 522646 0 0 3 0x14200 bored smr
1 213907 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 80195 (syz-executor.1) thread 0xffff800020acf658 (460816)
exclusive rrwlock inode r = 0 (0xfffffd806162c3d8)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:571
#5 vget+0x1c3 sys/kern/vfs_subr.c:672
#6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1323
#8 ufs_lookup+0x14b4 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91
#10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#11 namei+0x63c sys/kern/vfs_lookup.c:249
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd805ea0e3d0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:571
#5 vget+0x1c3 sys/kern/vfs_subr.c:672
#6 cache_lookup+0x2bb sys/kern/vfs_cache.c:224
#7 ufs_lookup+0x1bc sys/ufs/ufs/ufs_lookup.c:162
#8 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91
#9 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#10 namei+0x63c sys/kern/vfs_lookup.c:249
#11 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#13 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9630 6759K 9210K 78643K 55531 0 0
pcb 13 11K 13K 78643K 1752 0 0
rtable 106 13K 15K 78643K 5025 0 0
ifaddr 413 43K 44K 78643K 1670 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1899 0 0
iov 0 0K 60K 78643K 1757 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1232 77K 78K 78643K 14602 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 9K 78643K 91 0 0
VM map 68 34K 34K 78643K 93 0 0
sem 12 0K 1K 78643K 4454 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 5 13K 25K 78643K 7843 0 0
sigio 1 0K 0K 78643K 131 0 0
proc 62 63K 95K 78643K 3537 0 0
subproc 32 2K 2K 78643K 1003 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 1K 78643K 762 0 0
in_multi 18 1K 2K 78643K 1016 0 0
ether_multi 1 0K 0K 78643K 89 0 0
mrt 0 0K 0K 78643K 41 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 102 450K 450K 78643K 102 0 0
exec 0 0K 1K 78643K 1776 0 0
pfkey data 0 0K 4K 78643K 4 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 268 597K 602K 78643K 29613 0 0
UVM aobj 130 8K 8K 78643K 130 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 0K 78643K 1652 0 0
NDP 27 0K 1K 78643K 445 0 0
temp 187 3556K 4196K 78643K 266679 0 0
kqueue 0 0K 0K 78643K 82 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 193 0 188 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 785 0 783 1 0 1 1 0 8 0
rtentry 112 918 0 883 2 0 2 2 0 8 0
unpcb 120 12955 0 12938 46 43 3 5 0 8 2
syncache 264 41 0 41 19 18 1 1 0 8 1
tcpqe 32 107 0 107 13 13 0 1 0 8 0
tcpcb 544 4105 0 4097 53 51 2 14 0 8 1
ipq 40 3 0 3 2 2 0 1 0 8 0
ipqe 40 6 0 6 2 2 0 1 0 8 0
inpcb 280 15056 0 15045 56 53 3 9 0 8 2
rttmr 72 11 0 11 10 10 0 1 0 8 0
ip6q 72 4 0 4 3 3 0 1 0 8 0
ip6af 40 9 0 9 2 2 0 1 0 8 0
nd6 48 128 0 127 6 5 1 1 0 8 0
pkpcb 40 41 0 41 12 12 0 1 0 8 0
swfcl 56 10 0 0 1 0 1 1 0 8 0
ppxss 1128 182 0 182 25 24 1 1 0 8 1
pffrag 232 246 0 246 11 10 1 1 0 482 1
pffrnode 88 243 0 243 11 10 1 1 0 8 1
pffrent 40 9181 0 9181 11 10 1 1 0 8 1
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 24 724 0 654 1 0 1 1 0 8 0
pfstkey 112 725 0 655 4 1 3 4 0 8 0
pfstate 328 725 0 655 12 5 7 9 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 46 0 45 22 21 1 4 0 8 0
art_heap4 256 4034 0 3843 63 46 17 18 0 8 4
art_table 32 4080 0 3888 5 2 3 3 0 8 0
art_node 16 917 0 884 1 0 1 1 0 8 0
sysvmsgpl 40 87 0 47 1 0 1 1 0 8 0
semupl 112 3 0 3 2 2 0 1 0 8 0
semapl 112 4452 0 4442 1 0 1 1 0 8 0
shmpl 112 128 0 0 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 14616 0 13164 47 0 47 47 0 8 0
ffsino 272 14616 0 13164 98 1 97 97 0 8 0
nchpl 144 27397 0 26869 61 41 20 61 0 8 0
uvmvnodes 72 7045 0 0 129 0 129 129 0 8 0
vnodes 208 7045 0 0 371 0 371 371 0 8 0
namei 1024 102437 0 102437 3 2 1 1 0 8 1
percpumem 16 30 0 0 1 0 1 1 0 8 0
vcpupl 1984 66 0 0 9 0 9 9 0 8 0
vmpool 552 91 0 25 5 0 5 5 0 8 0
scsiplug 64 17 0 17 13 13 0 1 0 8 0
scxspl 192 92402 0 92401 62 59 3 6 0 8 2
plimitpl 152 703 0 695 1 0 1 1 0 8 0
sigapl 432 7878 0 7863 4 2 2 3 0 8 0
futexpl 56 289062 0 289062 2 1 1 1 0 8 1
knotepl 112 1888 0 1869 6 5 1 3 0 8 0
kqueuepl 104 2717 0 2715 11 10 1 4 0 8 0
pipepl 160 5180 0 5161 26 24 2 2 0 8 1
fdescpl 488 7879 0 7863 3 0 3 3 0 8 0
filepl 152 87168 0 87066 96 89 7 14 0 8 2
lockfpl 104 9190 0 9189 1 0 1 1 0 8 0
lockfspl 48 2648 0 2647 1 0 1 1 0 8 0
sessionpl 112 83 0 72 1 0 1 1 0 8 0
pgrppl 48 189 0 178 1 0 1 1 0 8 0
ucredpl 96 7762 0 7753 1 0 1 1 0 8 0
zombiepl 144 7867 0 7866 2 1 1 1 0 8 0
processpl 896 7899 0 7866 5 1 4 5 0 8 0
procpl 632 25720 0 25678 5 0 5 5 0 8 0
srpgc 64 98 0 98 25 24 1 1 0 8 1
sosppl 128 261 0 261 26 25 1 1 0 8 1
sockpl 384 29079 0 29049 175 164 11 20 0 8 6
mcl64k 65536 528 0 0 61 33 28 33 0 8 1
mcl16k 16384 26 0 0 3 1 2 3 0 8 0
mcl12k 12288 33 0 0 2 0 2 2 0 8 0
mcl9k 9216 33 0 0 3 1 2 2 0 8 0
mcl8k 8192 25 0 0 3 0 3 3 0 8 0
mcl4k 4096 25 0 0 3 0 3 3 0 8 0
mcl2k2 2112 14 0 0 1 0 1 1 0 8 0
mcl2k 2048 259 0 0 24 12 12 24 0 8 0
mtagpl 80 200 0 0 2 0 2 2 0 8 0
mbufpl 256 1011 0 0 48 0 48 48 0 8 0
bufpl 256 31007 0 23393 476 0 476 476 0 8 0
anonpl 16 1014813 0 980925 297 146 151 154 0 124 12
amapchunkpl 152 61041 0 60346 122 91 31 41 0 158 2
amappl16 192 41456 0 39976 260 177 83 87 0 8 7
amappl15 184 668 0 668 6 6 0 1 0 8 0
amappl14 176 1595 0 1589 1 0 1 1 0 8 0
amappl13 168 1056 0 1056 5 5 0 1 0 8 0
amappl12 160 637 0 627 1 0 1 1 0 8 0
amappl11 152 2281 0 2265 1 0 1 1 0 8 0
amappl10 144 433 0 429 1 0 1 1 0 8 0
amappl9 136 2627 0 2623 1 0 1 1 0 8 0
amappl8 128 2310 0 2230 3 0 3 3 0 8 0
amappl7 120 686 0 676 1 0 1 1 0 8 0
amappl6 112 2111 0 2096 1 0 1 1 0 8 0
amappl5 104 1562 0 1547 1 0 1 1 0 8 0
amappl4 96 8042 0 8008 1 0 1 1 0 8 0
amappl3 88 2143 0 2128 1 0 1 1 0 8 0
amappl2 80 59980 0 59893 3 0 3 3 0 8 0
amappl1 72 188880 0 188444 26 15 11 20 0 8 0
amappl 80 27101 0 27014 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 17 0 17 1 1 0 1 0 8 0
aobjpl 64 129 0 0 3 0 3 3 0 8 0
uaddrrnd 24 7970 0 7863 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 7970 0 7863 1 0 1 1 0 8 0
vmmpekpl 168 66476 0 66426 3 0 3 3 0 8 0
vmmpepl 168 1031821 0 1028895 420 243 177 181 0 357 38
vmsppl 368 7878 0 7863 2 0 2 2 0 8 0
pdppl 4096 15947 0 15842 17 3 14 14 0 8 0
pvpl 32 2611111 0 2585856 472 235 237 248 0 265 23
pmappl 232 7969 0 7888 5 0 5 5 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 883 0 173 21 0 21 21 0 8 0