`€`€`€panic: ifpanic: 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 *405307 19268 0 0 0 1 syz-executor.0 174377 76773 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(ffffffff82200188,ffffffff821ed953,2b2,ffffffff821d0477) 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(ffffffff82200188,ffffffff821ed953,2b2,ffffffff821d0477) 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 0xffff8000215653e0 rbx 0xffff800021565490 rdx 0xffff800020abe9f8 rcx 0 rax 0 r8 0xffffffff8164589f kprintf+0x16f r9 0x1 r10 0x25 r11 0xcce53b6b01da18f8 r12 0x3000000008 r13 0xffff8000215653f0 r14 0x104 r15 0x1 rip 0xffffffff81ae23c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000215653d0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=405307 stat=onproc flags process=0 proc=0 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800020a5e9e8,0xffffffff8264b2e0 process=0xffff800020adc380 user=0xffff800021560000, vmspace=0xfffffd807f00c5c0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *19268 405307 70799 0 7 0 syz-executor.0 76773 148020 13342 0 2 0 syz-executor.1 76773 174377 13342 0 7 0x4000000 syz-executor.1 13342 164429 43479 0 3 0x82 nanosleep syz-executor.1 70799 173934 43479 0 2 0x2 syz-executor.0 23867 42158 0 0 3 0x14200 acct acct 646 43358 1 0 3 0x100083 ttyin getty 48298 251632 0 0 3 0x14200 bored sosplice 43479 207989 11582 0 2 0x82 syz-fuzzer 43479 267285 11582 0 3 0x4000082 nanosleep syz-fuzzer 43479 305652 11582 0 3 0x4000082 thrsleep syz-fuzzer 43479 336400 11582 0 3 0x4000082 thrsleep syz-fuzzer 43479 149134 11582 0 3 0x4000082 thrsleep syz-fuzzer 43479 401129 11582 0 3 0x4000082 thrsleep syz-fuzzer 43479 477886 11582 0 3 0x4000082 thrsleep syz-fuzzer 43479 187135 11582 0 3 0x4000082 thrsleep syz-fuzzer 43479 412896 11582 0 3 0x4000082 thrsleep syz-fuzzer 43479 45156 11582 0 3 0x4000082 nanosleep syz-fuzzer 11582 439607 31823 0 3 0x10008a pause ksh 31823 68973 51014 0 3 0x92 select sshd 51014 126354 1 0 3 0x80 select sshd 7735 460977 67386 74 3 0x100092 bpf pflogd 67386 392082 1 0 3 0x80 netio pflogd 38663 212387 25941 73 3 0x100090 kqread syslogd 25941 188458 1 0 3 0x100082 netio syslogd 54315 436849 1 77 3 0x100090 poll dhclient 85925 321813 1 0 3 0x80 poll dhclient 45908 44275 0 0 2 0x14200 zerothread 38353 17884 0 0 3 0x14200 aiodoned aiodoned 54453 257184 0 0 3 0x14200 syncer update 90625 84187 0 0 3 0x14200 cleaner cleaner 95505 2907 0 0 3 0x14200 reaper reaper 64540 252587 0 0 3 0x14200 pgdaemon pagedaemon 9404 189562 0 0 3 0x14200 bored crynlk 58121 450847 0 0 3 0x14200 bored crypto 32988 384323 0 0 3 0x40014200 acpi0 acpi0 30740 415398 0 0 3 0x40014200 idle1 33015 451805 0 0 3 0x14200 bored softnet 91656 8372 0 0 3 0x14200 bored systqmp 97907 348508 0 0 3 0x14200 bored systq 1541 436940 0 0 3 0x40014200 bored softclock 70542 453222 0 0 3 0x40014200 idle0 92385 227843 0 0 3 0x14200 bored smr 1 84213 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 76773 (syz-executor.1) thread 0xffff800020a5e9e8 (174377) exclusive rwlock netlock r = 0 (0xffffffff824c26d8) #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 (0xffffffff8261f7a8) #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 70799 (syz-executor.0) thread 0xffff800020abe290 (173934) exclusive rrwlock inode r = 0 (0xfffffd806728d2c8) #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 (0xfffffd806e7c93c8) #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 9608 6475K 7182K 78643K 22931 0 0 pcb 13 8K 8K 78643K 808 0 0 rtable 100 8K 9K 78643K 2154 0 0 ifaddr 81 18K 22K 78643K 686 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1634 0 0 iov 0 0K 16K 78643K 739 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1225 77K 78K 78643K 6163 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 73 0 0 VM map 2 1K 1K 78643K 13 0 0 sem 12 0K 1K 78643K 818 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 5671 0 0 sigio 0 0K 0K 78643K 57 0 0 proc 62 63K 95K 78643K 1911 0 0 subproc 32 2K 2K 78643K 433 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 2315 0 0 in_multi 22 1K 2K 78643K 467 0 0 ether_multi 1 0K 0K 78643K 38 0 0 mrt 0 0K 0K 78643K 31 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 186 821K 821K 78643K 186 0 0 exec 0 0K 1K 78643K 900 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 127 23K 32K 78643K 20077 0 0 UVM aobj 130 4K 5K 78643K 186 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 848 0 0 NDP 20 0K 0K 78643K 219 0 0 temp 228 3557K 3632K 78643K 106903 0 0 kqueue 0 0K 0K 78643K 44 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 59 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 308 0 306 1 0 1 1 0 8 0 rtentry 112 304 0 270 2 0 2 2 0 8 0 unpcb 120 2445 0 2425 4 3 1 2 0 8 0 syncache 264 16 0 16 7 7 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 6319 0 6319 1 1 0 1 0 8 0 tcpcb 544 1480 0 1475 3 2 1 3 0 8 0 inpcb 280 5112 0 5102 15 13 2 3 0 8 1 rttmr 72 5 0 5 5 5 0 1 0 8 0 nd6 48 50 0 48 1 0 1 1 0 8 0 pkpcb 40 27 0 27 10 9 1 1 0 8 1 ppxss 1128 89 0 89 20 19 1 1 0 8 1 pffrag 232 8 0 8 4 3 1 1 0 482 1 pffrnode 88 8 0 8 4 3 1 1 0 8 1 pffrent 40 22 0 22 4 3 1 1 0 8 1 pfosfp 40 846 0 846 5 5 0 5 0 8 0 pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0 pfstitem 24 147 0 122 1 0 1 1 0 8 0 pfstkey 112 147 0 122 1 0 1 1 0 8 0 pfstate 328 147 0 122 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 1316 0 1144 32 18 14 16 0 8 1 art_table 32 1318 0 1145 2 0 2 2 0 8 0 art_node 16 300 0 269 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 5 1 1 0 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 812 0 802 1 0 1 1 0 8 0 shmpl 112 184 0 56 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 10264 0 8844 47 1 46 47 0 8 0 ffsino 272 10264 0 8844 96 0 96 96 0 8 0 nchpl 144 22059 0 20417 63 1 62 62 0 8 0 uvmvnodes 72 5992 0 0 109 0 109 109 0 8 0 vnodes 208 5992 0 0 316 0 316 316 0 8 0 namei 1024 75325 0 75325 5 4 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 11 0 11 6 6 0 1 0 8 0 scsiplug 64 10 0 10 6 6 0 1 0 8 0 scxspl 192 55452 0 55452 37 34 3 7 0 8 3 plimitpl 152 553 0 545 1 0 1 1 0 8 0 sigapl 432 5804 0 5788 3 1 2 3 0 8 0 futexpl 56 107429 0 107429 2 1 1 1 0 8 1 knotepl 112 1341 0 1322 2 1 1 2 0 8 0 kqueuepl 104 1419 0 1417 1 0 1 1 0 8 0 pipepl 112 3160 0 3141 13 12 1 2 0 8 0 fdescpl 488 5805 0 5788 3 0 3 3 0 8 0 filepl 152 49330 0 49229 26 21 5 9 0 8 1 lockfpl 104 1721 0 1720 1 0 1 1 0 8 0 lockfspl 48 598 0 597 1 0 1 1 0 8 0 sessionpl 112 43 0 32 1 0 1 1 0 8 0 pgrppl 48 102 0 91 1 0 1 1 0 8 0 ucredpl 96 6609 0 6600 1 0 1 1 0 8 0 zombiepl 144 5788 0 5788 3 2 1 1 0 8 1 processpl 896 5822 0 5788 4 0 4 4 0 8 0 procpl 632 18151 0 18107 11 6 5 5 0 8 1 srpgc 64 49 0 49 16 15 1 1 0 8 1 sosppl 128 70 0 70 14 14 0 1 0 8 0 sockpl 384 7971 0 7941 29 25 4 7 0 8 0 mcl64k 65536 672 0 0 82 40 42 65 0 8 1 mcl16k 16384 13 0 0 2 0 2 2 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 22 0 0 3 1 2 3 0 8 0 mcl4k 4096 30 0 0 3 0 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 166 0 0 16 2 14 16 0 8 0 mtagpl 80 112 0 0 2 0 2 2 0 8 0 mbufpl 256 805 0 0 39 0 39 39 0 8 0 bufpl 256 22997 0 15949 441 0 441 441 0 8 0 anonpl 16 561106 0 546132 175 110 65 78 0 124 0 amapchunkpl 152 36675 0 36567 32 26 6 10 0 158 0 amappl16 192 28185 0 27322 183 138 45 56 0 8 1 amappl15 184 804 0 804 1 1 0 1 0 8 0 amappl14 176 1754 0 1751 2 1 1 1 0 8 0 amappl13 168 1402 0 1402 4 4 0 1 0 8 0 amappl12 160 292 0 290 1 0 1 1 0 8 0 amappl11 152 311 0 296 1 0 1 1 0 8 0 amappl10 144 950 0 942 1 0 1 1 0 8 0 amappl9 136 982 0 975 1 0 1 1 0 8 0 amappl8 128 575 0 535 2 0 2 2 0 8 0 amappl7 120 1054 0 1045 1 0 1 1 0 8 0 amappl6 112 301 0 285 1 0 1 1 0 8 0 amappl5 104 609 0 595 1 0 1 1 0 8 0 amappl4 96 6040 0 6008 1 0 1 1 0 8 0 amappl3 88 2749 0 2744 1 0 1 1 0 8 0 amappl2 80 45228 0 45156 3 1 2 3 0 8 0 amappl1 72 136468 0 136035 26 16 10 20 0 8 0 amappl 80 18803 0 18765 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 dma64 64 259 0 259 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 64 185 0 56 3 0 3 3 0 8 0 uaddrrnd 24 5816 0 5788 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5816 0 5788 1 0 1 1 0 8 0 vmmpekpl 168 47373 0 47336 4 1 3 3 0 8 0 vmmpepl 168 722382 0 720305 349 228 121 123 0 357 26 vmsppl 368 5804 0 5788 2 0 2 2 0 8 0 pdppl 4096 11639 0 11598 7 1 6 6 0 8 0 pvpl 32 1555106 0 1536886 388 234 154 187 0 265 2 pmappl 232 5815 0 5799 8 7 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 740 0 72 20 0 20 20 0 8 0