panic: ifpanic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 683
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
94227 43572 0 0 0x4000000 0 syz-executor.1
*402738 43572 0 0 0x4000000 1 syz-executor.1
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(ffffffff82205e21,ffffffff821f1bbd,2ab,ffffffff821d425c) at __assert+0x2b sys/kern/subr_prf.c:154
proc_trampoline_mp() at proc_trampoline_mp+0x123
end trace frame: 0x0, count: 11
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
ifa_update_broadaddr does not support dynamic length
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(ffffffff82205e21,ffffffff821f1bbd,2ab,ffffffff821d425c) at __assert+0x2b sys/kern/subr_prf.c:154
proc_trampoline_mp() at proc_trampoline_mp+0x123
end trace frame: 0x0, count: -4
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff800021bc5310
rbx 0xffff800021bc53c0
rdx 0xffff800020b75658
rcx 0
rax 0
r8 0xffffffff8188b28f kprintf+0x16f
r9 0x1
r10 0x25
r11 0x66b17750e813f74b
r12 0x3000000008
r13 0xffff800021bc5320
r14 0x104
r15 0x1
rip 0xffffffff81bab4d8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800021bc5300
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.1) pid=402738 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020b75168,0xffffffff8264c6f8
process=0xffff800020addc00 user=0xffff800021bc0000, vmspace=0xfffffd807f00a170
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
70704 398074 83017 0 2 0 syz-executor.0
70704 313395 83017 0 3 0x4000080 fsleep syz-executor.0
43572 411584 11599 0 2 0 syz-executor.1
43572 94227 11599 0 7 0x4000000 syz-executor.1
*43572 402738 11599 0 7 0x4000000 syz-executor.1
11599 150172 98418 0 3 0x82 nanosleep syz-executor.1
1039 29270 0 0 3 0x14200 bored sosplice
83017 394919 98418 0 3 0x82 nanosleep syz-executor.0
98418 166280 36738 0 3 0x82 kqread syz-fuzzer
98418 288496 36738 0 3 0x4000082 thrsleep syz-fuzzer
98418 81338 36738 0 3 0x4000082 thrsleep syz-fuzzer
98418 139790 36738 0 3 0x4000082 thrsleep syz-fuzzer
98418 96517 36738 0 3 0x4000082 thrsleep syz-fuzzer
98418 68387 36738 0 3 0x4000082 thrsleep syz-fuzzer
98418 433030 36738 0 3 0x4000082 thrsleep syz-fuzzer
98418 267988 36738 0 3 0x4000082 thrsleep syz-fuzzer
98418 210406 36738 0 3 0x4000082 thrsleep syz-fuzzer
98418 398950 36738 0 3 0x4000082 thrsleep syz-fuzzer
36738 463431 81674 0 3 0x10008a pause ksh
81674 383875 32617 0 3 0x92 select sshd
34795 172335 1 0 3 0x100083 ttyin getty
32617 253247 1 0 3 0x80 select sshd
46435 182563 53261 74 3 0x100092 bpf pflogd
53261 136836 1 0 3 0x80 netio pflogd
36178 261778 23465 73 3 0x100090 kqread syslogd
23465 37969 1 0 3 0x100082 netio syslogd
77350 250418 1 77 3 0x100090 poll dhclient
68518 137321 1 0 3 0x80 poll dhclient
55612 87699 0 0 2 0x14200 zerothread
326 445560 0 0 3 0x14200 aiodoned aiodoned
70451 409195 0 0 3 0x14200 syncer update
65231 423782 0 0 3 0x14200 cleaner cleaner
95854 403348 0 0 3 0x14200 reaper reaper
15679 189472 0 0 3 0x14200 pgdaemon pagedaemon
78254 521636 0 0 3 0x14200 bored crynlk
64380 36383 0 0 3 0x14200 bored crypto
18604 521532 0 0 3 0x40014200 acpi0 acpi0
18204 259238 0 0 3 0x40014200 idle1
11850 466469 0 0 3 0x14200 bored softnet
90727 482807 0 0 3 0x14200 bored systqmp
93020 269464 0 0 3 0x14200 bored systq
53816 163486 0 0 3 0x40014200 bored softclock
31104 218087 0 0 3 0x40014200 idle0
14007 369304 0 0 3 0x14200 bored smr
1 317542 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 70704 (syz-executor.0) thread 0xffff800020b75168 (313395)
exclusive rrwlock inode r = 0 (0xfffffd8061e30b40)
#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 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140
#4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1352
#5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392
#6 ufs_makeinode+0xaa sys/ufs/ufs/ufs_vnops.c:1832
#7 ufs_create+0x41 sys/ufs/ufs/ufs_vnops.c:152
#8 VOP_CREATE+0xc0 sys/kern/vfs_vops.c:113
#9 vn_open+0x2b4 sys/kern/vfs_vnops.c:125
#10 doopenat+0x28b sys/kern/vfs_syscalls.c:1157
#11 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#11 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#12 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806ac61098)
#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:574
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 vn_open+0x1c2 sys/kern/vfs_vnops.c:116
#8 doopenat+0x28b sys/kern/vfs_syscalls.c:1157
#9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#10 Xsyscall+0x128
Process 43572 (syz-executor.1) thread 0xffff800020b74a00 (94227)
exclusive rwlock netlock r = 0 (0xffffffff824e8728)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 in_ioctl_change_ifaddr+0x3f
#2 in_ioctl+0x205 sys/netinet/in.c:234
#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 (0xffffffff8266bc58)
#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{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9537 6664K 6851K 78643K 11220 0 0
pcb 13 8K 8K 78643K 70 0 0
rtable 90 3K 4K 78643K 358 0 0
ifaddr 54 12K 13K 78643K 118 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1517 0 0
iov 0 0K 16K 78643K 57 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1219 77K 77K 78643K 1501 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 5K 78643K 7 0 0
VM map 3 1K 1K 78643K 3 0 0
sem 12 0K 0K 78643K 172 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 6 17K 25K 78643K 284 0 0
sigio 0 0K 0K 78643K 7 0 0
proc 61 63K 95K 78643K 491 0 0
subproc 32 2K 2K 78643K 51 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 0K 78643K 155 0 0
in_multi 23 1K 2K 78643K 44 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 102 450K 450K 78643K 102 0 0
exec 0 0K 1K 78643K 236 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 107 38K 39K 78643K 1906 0 0
UVM aobj 30 2K 2K 78643K 32 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 74 0 0
NDP 11 0K 0K 78643K 32 0 0
temp 164 3559K 3623K 78643K 7593 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 8 0 3 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 27 0 25 1 0 1 1 0 8 0
rtentry 112 62 0 27 2 0 2 2 0 8 0
unpcb 120 175 0 165 1 0 1 1 0 8 0
syncache 264 5 0 5 2 2 0 1 0 8 0
tcpqe 32 69 0 69 1 1 0 1 0 8 0
tcpcb 544 214 0 210 3 2 1 2 0 8 0
inpcb 280 577 0 569 3 1 2 3 0 8 1
ip6q 72 2 0 2 1 1 0 1 0 8 0
ip6af 40 6 0 6 1 1 0 1 0 8 0
nd6 48 8 0 6 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 1 0 1 0 8 0
ppxss 1128 12 0 12 2 1 1 1 0 8 1
pffrag 232 6 0 6 2 1 1 1 0 482 1
pffrnode 88 6 0 6 2 1 1 1 0 8 1
pffrent 40 227 0 227 2 1 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 27 0 4 1 0 1 1 0 8 0
pfstkey 112 27 0 4 1 0 1 1 0 8 0
pfstate 328 27 0 4 2 0 2 2 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 256 298 0 124 15 4 11 15 0 8 0
art_table 32 299 0 124 2 0 2 2 0 8 0
art_node 16 61 0 29 1 0 1 1 0 8 0
sysvmsgpl 40 18 0 14 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 170 0 160 1 0 1 1 0 8 0
shmpl 112 30 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 1863 0 450 46 0 46 46 0 8 0
ffsino 272 1863 0 450 95 0 95 95 0 8 0
nchpl 144 2467 0 857 61 0 61 61 0 8 0
uvmvnodes 72 2084 0 0 38 0 38 38 0 8 0
vnodes 208 2084 0 0 110 0 110 110 0 8 0
namei 1024 7526 0 7526 1 0 1 1 0 8 1
percpumem 16 30 0 0 1 0 1 1 0 8 0
vcpupl 1984 1 0 0 1 0 1 1 0 8 0
vmpool 552 1 0 0 1 0 1 1 0 8 0
scxspl 192 6760 0 6760 8 6 2 7 0 8 2
plimitpl 152 32 0 24 1 0 1 1 0 8 0
sigapl 432 481 0 465 3 1 2 3 0 8 0
futexpl 56 7138 0 7137 1 0 1 1 0 8 0
knotepl 112 99 0 80 1 0 1 1 0 8 0
kqueuepl 104 76 0 74 1 0 1 1 0 8 0
pipepl 112 428 0 409 3 1 2 2 0 8 1
fdescpl 488 482 0 465 3 0 3 3 0 8 0
filepl 152 3999 0 3897 7 1 6 7 0 8 2
lockfpl 104 88 0 86 1 0 1 1 0 8 0
lockfspl 48 34 0 32 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 23 0 12 1 0 1 1 0 8 0
ucredpl 96 693 0 684 1 0 1 1 0 8 0
zombiepl 144 466 0 466 1 0 1 1 0 8 1
processpl 896 499 0 466 4 0 4 4 0 8 0
procpl 632 1097 0 1052 5 0 5 5 0 8 0
srpgc 64 4 0 4 1 1 0 1 0 8 0
sosppl 128 3 0 3 2 1 1 1 0 8 1
sockpl 384 784 0 764 6 2 4 6 0 8 2
mcl64k 65536 9 0 0 2 0 2 2 0 8 0
mcl12k 12288 4 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 5 0 0 1 0 1 1 0 8 0
mcl4k 4096 9 0 0 2 0 2 2 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 150 0 0 18 0 18 18 0 8 0
mtagpl 80 6 0 0 1 0 1 1 0 8 0
mbufpl 256 341 0 0 20 0 20 20 0 8 0
bufpl 256 6719 0 1314 338 0 338 338 0 8 0
anonpl 16 68211 0 48980 98 10 88 97 0 124 7
amapchunkpl 152 2754 0 2615 10 4 6 9 0 158 0
amappl16 192 2525 0 1405 68 11 57 68 0 8 1
amappl15 184 1 0 0 1 0 1 1 0 8 0
amappl14 176 230 0 226 1 0 1 1 0 8 0
amappl13 168 1 0 1 1 1 0 1 0 8 0
amappl12 160 48 0 45 1 0 1 1 0 8 0
amappl11 152 55 0 40 1 0 1 1 0 8 0
amappl10 144 14 0 10 1 0 1 1 0 8 0
amappl9 136 630 0 624 1 0 1 1 0 8 0
amappl8 128 186 0 163 1 0 1 1 0 8 0
amappl7 120 46 0 41 1 0 1 1 0 8 0
amappl6 112 74 0 64 1 0 1 1 0 8 0
amappl5 104 186 0 169 1 0 1 1 0 8 0
amappl4 96 505 0 474 1 0 1 1 0 8 0
amappl3 88 549 0 537 1 0 1 1 0 8 0
amappl2 80 2879 0 2798 3 1 2 3 0 8 0
amappl1 72 20598 0 20139 25 14 11 20 0 8 0
amappl 80 1363 0 1320 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 31 0 2 1 0 1 1 0 8 0
uaddrrnd 24 483 0 465 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 483 0 465 1 0 1 1 0 8 0
vmmpekpl 168 8090 0 8057 2 0 2 2 0 8 0
vmmpepl 168 67390 0 65023 154 13 141 142 0 357 38
vmsppl 368 481 0 465 2 0 2 2 0 8 0
pdppl 4096 973 0 931 6 0 6 6 0 8 0
pvpl 32 208398 0 186140 221 9 212 221 0 265 26
pmappl 232 482 0 465 2 0 2 2 0 8 1
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 511 0 9 15 0 15 15 0 8 0