panic: pianfiac_:u pkdeartnee_lb drioaadgandodsrt dioces a nsots serutpipoonr t"!_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 *203282 72985 60929 0x10 0x4000000 1 syz-executor.1 302500 62951 0 0 0x4000000 0 syz-executor.0 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(ffffffff82206dbe,ffffffff821f5e72,2ab,ffffffff821d72f2) 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(ffffffff82206dbe,ffffffff821f5e72,2ab,ffffffff821d72f2) 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 0xffff800022bf1000 rbx 0xffff800022bf10b0 rdx 0xffff800020a5e9e8 rcx 0 rax 0 r8 0xffffffff816ab13f kprintf+0x16f r9 0x1 r10 0x25 r11 0xc0667b8762335027 r12 0x3000000008 r13 0xffff800022bf1010 r14 0x104 r15 0x1 rip 0xffffffff821156a8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022bf0ff0 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=203282 stat=onproc flags process=10 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020a5ec60,0xffffffff82675698 process=0xffff800020a8b190 user=0xffff800022bec000, vmspace=0xfffffd806e7c48a8 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 72985 361625 52547 60929 2 0x10 syz-executor.1 72985 433175 52547 60929 3 0x4000090 fsleep syz-executor.1 72985 444598 52547 60929 3 0x4000090 fsleep syz-executor.1 *72985 203282 52547 60929 7 0x4000010 syz-executor.1 62951 106497 33098 0 2 0 syz-executor.0 62951 184906 33098 0 3 0x4000080 poll syz-executor.0 62951 302500 33098 0 7 0x4000000 syz-executor.0 33098 323856 88397 0 3 0x82 nanosleep syz-executor.0 52547 363153 88397 0 3 0x82 nanosleep syz-executor.1 52246 371256 1 0 3 0x100083 ttyin getty 41708 296959 0 0 3 0x14200 bored sosplice 88397 303157 18134 0 3 0x82 thrsleep syz-fuzzer 88397 93027 18134 0 3 0x4000082 thrsleep syz-fuzzer 88397 235497 18134 0 3 0x4000082 thrsleep syz-fuzzer 88397 67203 18134 0 3 0x4000082 thrsleep syz-fuzzer 88397 185729 18134 0 3 0x4000082 thrsleep syz-fuzzer 88397 7358 18134 0 3 0x4000082 thrsleep syz-fuzzer 88397 440686 18134 0 3 0x4000082 kqread syz-fuzzer 88397 16532 18134 0 3 0x4000082 thrsleep syz-fuzzer 88397 182456 18134 0 3 0x4000082 thrsleep syz-fuzzer 88397 386483 18134 0 3 0x4000082 thrsleep syz-fuzzer 18134 299063 51814 0 3 0x10008a pause ksh 51814 11110 93746 0 3 0x92 select sshd 93746 315719 1 0 3 0x80 select sshd 50151 102243 39972 74 3 0x100092 bpf pflogd 39972 457673 1 0 3 0x80 netio pflogd 35716 359731 96658 73 3 0x100090 kqread syslogd 96658 261445 1 0 3 0x100082 netio syslogd 54860 432984 1 77 3 0x100090 poll dhclient 25324 269877 1 0 3 0x80 poll dhclient 69966 436211 0 0 2 0x14200 zerothread 17230 221754 0 0 3 0x14200 aiodoned aiodoned 39173 228904 0 0 3 0x14200 syncer update 96185 481272 0 0 3 0x14200 cleaner cleaner 70441 340180 0 0 3 0x14200 reaper reaper 61303 3437 0 0 3 0x14200 pgdaemon pagedaemon 8503 138972 0 0 3 0x14200 bored crynlk 15036 317355 0 0 3 0x14200 bored crypto 18580 456254 0 0 3 0x40014200 acpi0 acpi0 64196 69732 0 0 3 0x40014200 idle1 34711 125848 0 0 3 0x14200 bored softnet 45172 458320 0 0 3 0x14200 bored systqmp 6700 411560 0 0 3 0x14200 bored systq 61155 424354 0 0 3 0x40014200 bored softclock 4847 138160 0 0 3 0x40014200 idle0 97956 240469 0 0 3 0x14200 bored smr 1 331657 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 62951 (syz-executor.0) thread 0xffff800020a5ec60 (302500) exclusive rwlock netlock r = 0 (0xffffffff82500b58) #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 (0xffffffff82671c60) #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 9591 6448K 7001K 78643K 14628 0 0 pcb 13 8K 8K 78643K 332 0 0 rtable 101 5K 6K 78643K 1574 0 0 ifaddr 85 17K 17K 78643K 425 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1544 0 0 iov 0 0K 16K 78643K 315 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1212 76K 77K 78643K 2730 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 22 0 0 VM map 10 5K 5K 78643K 12 0 0 sem 12 1K 1K 78643K 362 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 1707 0 0 sigio 0 0K 0K 78643K 16 0 0 proc 64 75K 95K 78643K 1147 0 0 subproc 32 2K 2K 78643K 255 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 135 0 0 in_multi 23 1K 2K 78643K 259 0 0 ether_multi 1 0K 0K 78643K 13 0 0 mrt 0 0K 0K 78643K 6 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 78 344K 344K 78643K 78 0 0 exec 0 0K 1K 78643K 578 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 123 58K 64K 78643K 7347 0 0 UVM aobj 104 3K 3K 78643K 106 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 317 0 0 NDP 21 0K 1K 78643K 140 0 0 temp 234 3561K 3639K 78643K 53438 0 0 kqueue 0 0K 0K 78643K 22 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 63 0 60 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 179 0 177 1 0 1 1 0 8 0 rtentry 112 281 0 245 2 0 2 2 0 8 0 unpcb 120 840 0 827 1 0 1 1 0 8 0 syncache 264 16 0 16 9 9 0 1 0 8 0 tcpqe 32 19 0 19 5 5 0 1 0 8 0 tcpcb 544 540 0 536 2 1 1 2 0 8 0 inpcb 280 1895 0 1887 22 20 2 3 0 8 1 rttmr 72 4 0 3 3 2 1 1 0 8 0 ip6q 72 3 0 3 1 1 0 1 0 8 0 ip6af 40 7 0 7 1 1 0 1 0 8 0 nd6 48 38 0 36 1 0 1 1 0 8 0 pkpcb 40 12 0 12 6 6 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 46 0 46 25 25 0 1 0 8 0 pffrag 232 53 0 53 26 26 0 1 0 482 0 pffrnode 88 53 0 53 26 26 0 1 0 8 0 pffrent 40 1517 0 1517 26 26 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 24 191 0 175 1 0 1 1 0 8 0 pfstkey 112 191 0 175 1 0 1 1 0 8 0 pfstate 328 191 0 175 5 2 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 4 0 2 4 2 2 3 0 8 0 art_heap4 256 1172 0 967 22 8 14 16 0 8 0 art_table 32 1176 0 969 2 0 2 2 0 8 0 art_node 16 280 0 247 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 14 3 2 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 355 0 345 1 0 1 1 0 8 0 shmpl 112 104 0 2 4 1 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3900 0 2497 46 0 46 46 0 8 0 ffsino 272 3900 0 2497 94 0 94 94 0 8 0 nchpl 144 6443 0 4821 61 0 61 61 0 8 0 uvmvnodes 72 5046 0 0 92 0 92 92 0 8 0 vnodes 208 5046 0 0 266 0 266 266 0 8 0 namei 1024 21450 0 21450 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 8 0 0 1 0 1 1 0 8 0 vmpool 552 10 0 2 2 1 1 1 0 8 0 scsiplug 64 2 0 2 2 2 0 1 0 8 0 scxspl 192 21256 0 21256 27 24 3 7 0 8 3 plimitpl 152 141 0 133 1 0 1 1 0 8 0 sigapl 432 1870 0 1854 5 3 2 3 0 8 0 futexpl 56 32412 0 32410 1 0 1 1 0 8 0 knotepl 112 701 0 682 6 5 1 3 0 8 0 kqueuepl 104 859 0 857 1 0 1 1 0 8 0 pipepl 112 4782 0 4763 18 16 2 2 0 8 1 fdescpl 488 1871 0 1854 3 0 3 3 0 8 0 filepl 152 16844 0 16742 27 21 6 7 0 8 2 lockfpl 104 620 0 619 1 0 1 1 0 8 0 lockfspl 48 218 0 217 1 0 1 1 0 8 0 sessionpl 112 33 0 22 1 0 1 1 0 8 0 pgrppl 48 49 0 38 1 0 1 1 0 8 0 ucredpl 96 1659 0 1649 1 0 1 1 0 8 0 zombiepl 144 1855 0 1855 1 0 1 1 0 8 1 processpl 896 1888 0 1855 6 2 4 5 0 8 0 procpl 632 5570 0 5523 29 24 5 5 0 8 1 srpgc 64 21 0 21 9 9 0 1 0 8 0 sosppl 128 19 0 19 9 9 0 1 0 8 0 sockpl 384 2943 0 2920 37 33 4 6 0 8 1 mcl64k 65536 263 0 0 33 15 18 33 0 8 1 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 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 26 0 0 4 2 2 3 0 8 0 mcl4k 4096 11 0 0 2 0 2 2 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 205 0 0 19 10 9 19 0 8 0 mtagpl 80 26 0 0 1 0 1 1 0 8 0 mbufpl 256 956 0 0 26 1 25 25 0 8 0 bufpl 256 11293 0 4245 441 0 441 441 0 8 0 anonpl 16 1066189 0 1046569 248 152 96 112 0 124 1 amapchunkpl 152 19146 0 19001 59 51 8 14 0 158 0 amappl16 192 56163 0 55046 377 308 69 78 0 8 5 amappl15 184 341 0 340 1 0 1 1 0 8 0 amappl14 176 247 0 245 1 0 1 1 0 8 0 amappl13 168 59 0 59 2 2 0 1 0 8 0 amappl12 160 143 0 142 2 1 1 1 0 8 0 amappl11 152 350 0 333 1 0 1 1 0 8 0 amappl10 144 393 0 388 1 0 1 1 0 8 0 amappl9 136 1090 0 1082 1 0 1 1 0 8 0 amappl8 128 602 0 572 2 0 2 2 0 8 0 amappl7 120 472 0 464 1 0 1 1 0 8 0 amappl6 112 355 0 344 1 0 1 1 0 8 0 amappl5 104 366 0 352 1 0 1 1 0 8 0 amappl4 96 1975 0 1944 1 0 1 1 0 8 0 amappl3 88 490 0 483 1 0 1 1 0 8 0 amappl2 80 13385 0 13303 3 1 2 3 0 8 0 amappl1 72 52826 0 52360 26 16 10 20 0 8 0 amappl 80 6419 0 6367 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 64 105 0 2 2 0 2 2 0 8 0 uaddrrnd 24 1881 0 1854 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1881 0 1854 1 0 1 1 0 8 0 vmmpekpl 168 30213 0 30182 2 0 2 2 0 8 0 vmmpepl 168 295723 0 293303 416 299 117 153 0 357 10 vmsppl 368 1870 0 1854 2 0 2 2 0 8 0 pdppl 4096 3769 0 3720 9 2 7 7 0 8 0 pvpl 32 1598017 0 1575613 515 295 220 261 0 265 14 pmappl 232 1880 0 1856 4 2 2 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 668 0 45 19 0 19 19 0 8 0