panic: ifa_update_broadaddr does not supportpanic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 690 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *112593 42900 0 0 0 1 syz-executor.0 447139 28331 0 0 0x4000000 0 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(ffffffff82207063,ffffffff821f426b,2b2,ffffffff821d50d4) 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(ffffffff82207063,ffffffff821f426b,2b2,ffffffff821d50d4) 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 0xffff800021f9f2d0 rbx 0xffff800021f9f380 rdx 0xffff800020ab13d8 rcx 0 rax 0 r8 0xffffffff81ddb9af kprintf+0x16f r9 0x1 r10 0x25 r11 0xadd5e64f5fc2cf57 r12 0x3000000008 r13 0xffff800021f9f2e0 r14 0x104 r15 0x1 rip 0xffffffff81dad8c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021f9f2c0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=112593 stat=onproc flags process=0 proc=0 pri=78, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab0018,0xffffffff8264f2c0 process=0xffff800020adc000 user=0xffff800021f9a000, vmspace=0xfffffd807f00aa10 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *42900 112593 9791 0 7 0 syz-executor.0 28331 367886 96050 0 3 0x80 fsleep syz-executor.1 28331 447139 96050 0 7 0x4000000 syz-executor.1 96050 295175 1800 0 3 0x82 nanosleep syz-executor.1 9791 323806 1800 0 2 0x2 syz-executor.0 2883 270228 0 0 3 0x14200 bored sosplice 1800 231894 87231 0 3 0x82 thrsleep syz-fuzzer 1800 359186 87231 0 3 0x4000082 nanosleep syz-fuzzer 1800 467038 87231 0 3 0x4000082 thrsleep syz-fuzzer 1800 148525 87231 0 3 0x4000082 thrsleep syz-fuzzer 1800 285306 87231 0 3 0x4000082 thrsleep syz-fuzzer 1800 294611 87231 0 3 0x4000082 nanosleep syz-fuzzer 1800 242738 87231 0 3 0x4000082 thrsleep syz-fuzzer 1800 56315 87231 0 2 0x4000082 syz-fuzzer 1800 137444 87231 0 3 0x4000082 thrsleep syz-fuzzer 1800 214020 87231 0 3 0x4000082 thrsleep syz-fuzzer 87231 197270 10470 0 3 0x10008a pause ksh 10470 409917 29215 0 3 0x92 select sshd 62914 238763 1 0 3 0x100083 ttyin getty 29215 79743 1 0 3 0x80 select sshd 92467 142684 83618 74 3 0x100092 bpf pflogd 83618 130686 1 0 3 0x80 netio pflogd 53867 113123 70789 73 3 0x100090 kqread syslogd 70789 81227 1 0 3 0x100082 netio syslogd 2936 519209 1 77 3 0x100090 poll dhclient 42094 374067 1 0 3 0x80 poll dhclient 11229 202155 0 0 3 0x14200 pgzero zerothread 83914 176917 0 0 3 0x14200 aiodoned aiodoned 57207 296821 0 0 3 0x14200 syncer update 92500 507695 0 0 3 0x14200 cleaner cleaner 75074 89343 0 0 3 0x14200 reaper reaper 27043 148841 0 0 3 0x14200 pgdaemon pagedaemon 35431 376558 0 0 3 0x14200 bored crynlk 66557 459519 0 0 3 0x14200 bored crypto 85390 218828 0 0 3 0x40014200 acpi0 acpi0 37976 502579 0 0 3 0x40014200 idle1 67218 121104 0 0 3 0x14200 bored softnet 44976 464567 0 0 3 0x14200 bored systqmp 95902 103093 0 0 3 0x14200 bored systq 41400 89415 0 0 3 0x40014200 bored softclock 40797 471248 0 0 3 0x40014200 idle0 69925 178399 0 0 3 0x14200 bored smr 1 406366 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 28331 (syz-executor.1) thread 0xffff800020ab0018 (447139) exclusive rwlock netlock r = 0 (0xffffffff82494028) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 in_ioctl+0x142 #2 ifioctl+0xb64 sys/net/if.c:2202 #3 sys_ioctl+0x5b9 #4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82676c08) #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 Process 9791 (syz-executor.0) thread 0xffff800020ab09f8 (323806) exclusive rrwlock inode r = 0 (0xfffffd806f83ea30) #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_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1164 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2983 #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 exclusive rrwlock inode r = 0 (0xfffffd807b6f6708) #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:562 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2968 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9555 6627K 7624K 78643K 13758 0 0 pcb 13 8K 8K 78643K 115 0 0 rtable 105 4K 4K 78643K 642 0 0 ifaddr 68 14K 15K 78643K 215 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1508 0 0 iov 0 0K 16K 78643K 105 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1228 77K 77K 78643K 2218 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 8 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 228 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 644 0 0 sigio 0 0K 0K 78643K 12 0 0 proc 60 63K 95K 78643K 656 0 0 subproc 32 2K 2K 78643K 102 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 48 0 0 in_multi 29 1K 2K 78643K 113 0 0 ether_multi 1 0K 0K 78643K 5 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 54 238K 238K 78643K 54 0 0 exec 0 0K 1K 78643K 324 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 101 21K 30K 78643K 3185 0 0 UVM aobj 28 4K 4K 78643K 30 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 222 0 0 NDP 15 0K 0K 78643K 66 0 0 temp 192 3556K 3624K 78643K 19853 0 0 kqueue 0 0K 0K 78643K 2 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 15 0 9 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 67 0 65 1 0 1 1 0 8 0 rtentry 112 104 0 63 2 0 2 2 0 8 0 unpcb 120 287 0 277 1 0 1 1 0 8 0 syncache 264 11 0 11 5 4 1 1 0 8 1 tcpqe 32 5868 0 5868 2 1 1 1 0 8 1 tcpcb 544 319 0 312 1 0 1 1 0 8 0 inpcb 280 877 0 867 4 2 2 2 0 8 1 rttmr 72 1 0 0 1 0 1 1 0 8 0 nd6 48 15 0 12 1 0 1 1 0 8 0 ppxss 1128 24 0 24 2 1 1 1 0 8 1 pffrag 232 6 0 6 3 3 0 1 0 482 0 pffrnode 88 6 0 6 3 3 0 1 0 8 0 pffrent 40 55 0 55 3 3 0 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 65 0 25 1 0 1 1 0 8 0 pfstkey 112 65 0 25 2 0 2 2 0 8 0 pfstate 328 65 0 25 4 0 4 4 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 256 496 0 271 18 2 16 16 0 8 0 art_table 32 497 0 271 2 0 2 2 0 8 0 art_node 16 100 0 62 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 11 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 226 0 216 1 0 1 1 0 8 0 shmpl 112 28 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2372 0 969 46 0 46 46 0 8 0 ffsino 272 2372 0 969 95 0 95 95 0 8 0 nchpl 144 3610 0 3158 61 36 25 61 0 8 3 uvmvnodes 72 3255 0 0 60 0 60 60 0 8 0 vnodes 208 3255 0 0 172 0 172 172 0 8 0 namei 1024 11492 0 11492 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 10682 0 10682 12 10 2 7 0 8 2 plimitpl 152 51 0 43 1 0 1 1 0 8 0 sigapl 432 832 0 816 3 1 2 3 0 8 0 futexpl 56 14820 0 14819 1 0 1 1 0 8 0 knotepl 112 200 0 181 1 0 1 1 0 8 0 kqueuepl 104 125 0 123 1 0 1 1 0 8 0 pipepl 112 454 0 435 2 1 1 1 0 8 0 fdescpl 488 833 0 816 3 0 3 3 0 8 0 filepl 152 6371 0 6267 8 3 5 6 0 8 0 lockfpl 104 236 0 235 1 0 1 1 0 8 0 lockfspl 48 82 0 81 1 0 1 1 0 8 0 sessionpl 112 22 0 11 1 0 1 1 0 8 0 pgrppl 48 32 0 21 1 0 1 1 0 8 0 ucredpl 96 559 0 550 1 0 1 1 0 8 0 zombiepl 144 816 0 816 3 2 1 1 0 8 1 processpl 896 849 0 816 4 0 4 4 0 8 0 procpl 632 2212 0 2169 5 0 5 5 0 8 1 srpgc 64 4 0 4 2 1 1 1 0 8 1 sosppl 128 12 0 12 2 1 1 1 0 8 1 sockpl 384 1240 0 1218 6 3 3 4 0 8 0 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 12 0 0 2 0 2 2 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 173 0 0 21 0 21 21 0 8 0 mtagpl 80 153 0 0 3 0 3 3 0 8 0 mbufpl 256 442 0 0 27 1 26 26 0 8 0 bufpl 256 8888 0 1840 441 0 441 441 0 8 0 anonpl 16 115203 0 98190 100 22 78 86 0 124 7 amapchunkpl 152 5962 0 5848 19 13 6 12 0 158 0 amappl16 192 4552 0 3586 69 18 51 61 0 8 2 amappl15 184 223 0 223 1 1 0 1 0 8 0 amappl14 176 82 0 77 2 1 1 1 0 8 0 amappl13 168 17 0 16 2 1 1 1 0 8 0 amappl12 160 16 0 16 2 2 0 1 0 8 0 amappl11 152 67 0 51 1 0 1 1 0 8 0 amappl10 144 241 0 236 1 0 1 1 0 8 0 amappl9 136 756 0 749 1 0 1 1 0 8 0 amappl8 128 294 0 269 1 0 1 1 0 8 0 amappl7 120 286 0 280 1 0 1 1 0 8 0 amappl6 112 75 0 66 1 0 1 1 0 8 0 amappl5 104 180 0 165 1 0 1 1 0 8 0 amappl4 96 1109 0 1077 1 0 1 1 0 8 0 amappl3 88 139 0 134 1 0 1 1 0 8 0 amappl2 80 5704 0 5633 4 2 2 3 0 8 0 amappl1 72 28778 0 28334 26 16 10 20 0 8 0 amappl 80 2534 0 2494 2 1 1 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 29 0 2 1 0 1 1 0 8 0 uaddrrnd 24 833 0 816 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 833 0 816 1 0 1 1 0 8 0 vmmpekpl 168 10570 0 10538 2 0 2 2 0 8 0 vmmpepl 168 112705 0 110540 185 56 129 129 0 357 32 vmsppl 368 832 0 816 2 0 2 2 0 8 0 pdppl 4096 1673 0 1632 7 1 6 6 0 8 0 pvpl 32 332875 0 312652 229 34 195 203 0 265 29 pmappl 232 832 0 816 2 1 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 629 0 8 18 0 18 18 0 8 0