panic: vop_generipc_abnaidco:p kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 675 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *452679 85288 32767 0x10 0 1 syz-executor.2 199066 38714 32767 0x10 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82793a66) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82815067,ffffffff827d7bb8,2a3,ffffffff827ce857) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 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 *cpu0: vop_generic_badop cpu1: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 675 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82793a66) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82815067,ffffffff827d7bb8,2a3,ffffffff827ce857) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800022ce19d0 rbx 0xffff800020d59b8f rdx 0 rcx 0 rax 0xffff800021236db8 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf37aac9fdab3c618 r11 0x3e4f381a1ce01f5 r12 0xffff800020d59990 r13 0 r14 0xffffffff82c27990 cpu_info_full_primary+0x2990 r15 0x1 rip 0xffffffff81a3566c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800022ce19c0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.2) pid=452679 stat=onproc flags process=10 proc=0 pri=82, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000212a6b20,0xffffffff82d108a0 process=0xffff8000ffff4018 user=0xffff800022cdc000, vmspace=0xfffffd8008a023a0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *85288 452679 59503 32767 7 0x10 syz-executor.2 38714 221549 87535 32767 2 0x10 syz-executor.0 38714 199066 87535 32767 7 0x4000010 syz-executor.0 59503 425412 2507 32767 3 0x90 nanoslp syz-executor.2 2507 486758 97841 0 3 0x82 wait syz-executor.2 21462 333419 77163 32767 3 0x90 nanoslp syz-executor.5 77163 127370 97841 0 3 0x82 wait syz-executor.5 23481 170301 95364 32767 2 0x10 syz-executor.6 95364 433238 97841 0 3 0x82 wait syz-executor.6 10978 189663 30820 32767 2 0x10 syz-executor.1 30820 57683 97841 0 3 0x82 wait syz-executor.1 96538 151313 16718 32767 2 0x90 syz-executor.4 16718 490368 97841 0 3 0x82 wait syz-executor.4 87535 4448 52232 32767 3 0x90 nanoslp syz-executor.0 52232 492878 97841 0 3 0x82 wait syz-executor.0 76205 482306 44884 32767 3 0x90 nanoslp syz-executor.7 44884 96759 97841 0 3 0x82 wait syz-executor.7 77055 497496 0 0 3 0x14200 bored sosplice 27397 513423 53243 32767 2 0x10 syz-executor.3 53243 283016 97841 0 3 0x82 wait syz-executor.3 97841 273019 81331 0 3 0x82 wait syz-fuzzer 97841 325644 81331 0 3 0x4000082 nanoslp syz-fuzzer 97841 241620 81331 0 3 0x4000082 wait syz-fuzzer 97841 293424 81331 0 2 0x4000082 syz-fuzzer 97841 89089 81331 0 2 0x4000082 syz-fuzzer 97841 226730 81331 0 3 0x4000082 thrsleep syz-fuzzer 97841 92397 81331 0 3 0x4000082 thrsleep syz-fuzzer 97841 119856 81331 0 3 0x4000082 wait syz-fuzzer 97841 124840 81331 0 3 0x4000082 thrsleep syz-fuzzer 97841 53976 81331 0 3 0x4000082 thrsleep syz-fuzzer 97841 199913 81331 0 3 0x4000082 thrsleep syz-fuzzer 97841 126039 81331 0 3 0x4000082 wait syz-fuzzer 97841 381661 81331 0 3 0x4000082 wait syz-fuzzer 97841 25219 81331 0 3 0x4000082 wait syz-fuzzer 97841 265758 81331 0 3 0x4000082 wait syz-fuzzer 97841 203185 81331 0 3 0x4000082 wait syz-fuzzer 81331 464088 80560 0 3 0x10008a sigsusp ksh 80560 311182 60485 0 2 0x12 sshd 58521 443102 1 0 3 0x100083 ttyin getty 60485 517060 1 0 3 0x88 kqread sshd 25836 453303 10105 73 3 0x1100090 kqread syslogd 10105 100399 1 0 3 0x100082 netio syslogd 62378 440491 1 0 3 0x100080 kqread resolvd 33044 396653 20351 77 3 0x100092 kqread dhcpleased 92786 223294 20351 77 3 0x100092 kqread dhcpleased 20351 224352 1 0 3 0x80 kqread dhcpleased 81530 495318 0 0 3 0x14200 bored smr 88595 450982 0 0 2 0x14200 zerothread 10965 176709 0 0 3 0x14200 aiodoned aiodoned 99583 163343 0 0 3 0x14200 syncer update 70988 161823 0 0 3 0x14200 cleaner cleaner 89192 90084 0 0 3 0x14200 reaper reaper 42639 235106 0 0 3 0x14200 pgdaemon pagedaemon 61637 73050 0 0 3 0x14200 bored viomb 11267 237811 0 0 3 0x40014200 acpi0 acpi0 35921 76069 0 0 3 0x40014200 idle1 13558 108156 0 0 3 0x14200 bored softnet3 47583 295351 0 0 3 0x14200 bored softnet2 47476 346321 0 0 3 0x14200 bored softnet1 79205 60610 0 0 3 0x14200 bored softnet0 22490 223111 0 0 3 0x14200 bored systqmp 37486 434168 0 0 3 0x14200 bored systq 84207 422080 0 0 3 0x40014200 bored softclock 85186 144020 0 0 3 0x40014200 idle0 1 504058 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 38714 (syz-executor.0) thread 0xffff8000212a6b20 (199066) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82d06f80) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3c3 sys/kern/sched_bsd.c:404 #3 sleep_finish+0x184 sys/kern/kern_synch.c:417 #4 tsleep+0x12b sys/kern/kern_synch.c:155 #5 biowait+0x91 sys/kern/vfs_bio.c:1278 #6 bwrite+0x21f sys/kern/vfs_bio.c:769 #7 ffs_update+0x281 sys/ufs/ffs/ffs_inode.c:113 #8 ufs_mkdir+0x672 sys/ufs/ufs/ufs_vnops.c:1219 #9 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #10 domkdirat+0x125 sys/kern/vfs_syscalls.c:3074 #11 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #11 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807816df88) #0 witness_lock+0x44d #1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8f sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x200 sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1324 #8 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #9 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #10 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #11 domkdirat+0x125 sys/kern/vfs_syscalls.c:3074 #12 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #12 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ef4d3c8) #0 witness_lock+0x44d #1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8f sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3059 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 #9 Xsyscall+0x128 Process 27397 (syz-executor.3) thread 0xffff800021237898 (513423) exclusive rrwlock inode r = 0 (0xfffffd807816d3d8) #0 witness_lock+0x44d #1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8f sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3074 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8066dff920) #0 witness_lock+0x44d #1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8f sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3059 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10207 6411K 6419K 78643K 11377 0 pcb 13 16K 18K 78643K 19 0 rtable 246 7K 7K 78643K 2560 0 ifaddr 73 24K 25K 78643K 235 0 sysctl 3 1K 3K 78643K 108 0 counters 60 35K 35K 78643K 112 0 ioctlops 0 0K 2K 78643K 193 0 iov 0 0K 40K 78643K 3282 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 4321 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 288 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 3708 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 20 73K 121K 78643K 17052 0 sigio 0 0K 0K 78643K 337 0 proc 59 91K 103K 78643K 2270 0 subproc 104 6K 6K 78643K 442 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1349 0 in_multi 99 6K 6K 78643K 530 0 ether_multi 1 0K 0K 78643K 59 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 235 1049K 1049K 78643K 235 0 exec 0 0K 1K 78643K 2937 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 449 96K 994K 78643K 172179 0 UVM aobj 131 6K 6K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 583 0 NDP 11 0K 2K 78643K 105 0 temp 124 5866K 5994K 78643K 44779 0 kqueue 12 18K 32K 78643K 1529 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 1550 0 1547 20 19 1 3 0 8 0 rtentry 112 430 0 314 4 0 4 4 0 8 0 unpcb 144 12985 0 12972 127 117 10 10 0 8 9 syncache 296 165 0 165 31 31 0 1 0 8 0 tcpqe 32 197 0 197 26 26 0 1 0 8 0 tcpcb 776 37238 0 37230 588 578 10 28 0 8 8 arp 120 75 0 57 1 0 1 1 0 8 0 ipq 40 28 0 26 9 8 1 1 0 8 0 ipqe 40 199 0 197 9 8 1 1 0 8 0 inpcb 368 44978 0 44967 505 495 10 24 0 8 8 ip6q 72 5 0 5 2 2 0 1 0 8 0 ip6af 40 9 0 9 2 2 0 1 0 8 0 nd6 136 130 0 100 2 0 2 2 0 8 0 kcovpl 48 34 0 26 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1776 0 1286 36 5 31 32 0 8 0 art_table 32 1777 0 1286 5 0 5 5 0 8 0 art_node 16 429 0 323 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semapl 112 3706 0 3696 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 dino2pl 256 23405 0 21936 93 0 93 93 0 8 0 ffsino 272 23405 0 21936 99 0 99 99 0 8 0 nchpl 144 46801 0 45161 63 0 63 63 0 8 0 uvmvnodes 80 6156 0 0 126 0 126 126 0 8 0 vnodes 216 6156 0 0 342 0 342 342 0 8 0 namei 1024 160380 0 160378 7 6 1 2 0 8 0 percpumem 16 69 0 26 1 0 1 1 0 8 0 kstatmem 264 74 0 52 2 0 2 2 0 8 0 scxspl 216 183978 0 183978 68 67 1 8 0 8 1 plimitpl 152 4105 0 4082 34 33 1 2 0 8 0 sigapl 424 17291 0 17240 7 0 7 7 0 8 0 futexpl 64 167526 0 167526 9 8 1 1 0 8 1 knotepl 120 985 0 0 17 4 13 13 0 8 0 kqueuepl 216 4624 0 4616 84 79 5 10 0 8 4 pipepl 320 3848 0 3820 108 102 6 13 0 8 3 fdescpl 496 17273 0 17242 7 2 5 6 0 8 0 filepl 152 143544 0 143311 212 193 19 22 0 8 9 lockfpl 104 2348 0 2346 5 4 1 2 0 8 0 lockfspl 48 508 0 506 1 0 1 1 0 8 0 sessionpl 144 49 0 33 1 0 1 1 0 8 0 pgrppl 48 388 0 372 1 0 1 1 0 8 0 ucredpl 104 18786 0 18768 1 0 1 1 0 8 0 zombiepl 144 17242 0 17240 1 0 1 1 0 8 0 processpl 1072 17291 0 17240 5 1 4 5 0 8 0 procpl 696 49120 0 49053 26 18 8 9 0 8 0 sosppl 168 234 0 234 30 30 0 1 0 8 0 sockpl 488 63694 0 63667 1098 1064 34 35 0 8 29 mcl64k 65536 25 0 0 4 1 3 3 0 8 0 mcl16k 16384 26 0 0 3 0 3 3 0 8 0 mcl12k 12288 33 0 0 2 0 2 2 0 8 0 mcl9k 9216 25 0 0 2 0 2 2 0 8 0 mcl8k 8192 41 0 0 3 0 3 3 0 8 0 mcl4k 4096 41 0 0 4 1 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 543 0 0 40 23 17 40 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 2590 0 0 128 1 127 127 0 8 0 bufpl 288 35064 0 28749 452 0 452 452 0 8 0 anonpl 24 1879116 0 1866300 224 119 105 128 0 186 0 amapchunkpl 152 1553815 0 1552984 15183 14980 203 4432 0 158 158 amappl16 200 40697 0 40372 223 197 26 44 0 8 5 amappl15 192 13 0 12 1 0 1 1 0 8 0 amappl14 184 235 0 217 2 1 1 2 0 8 0 amappl13 176 27 0 26 1 0 1 1 0 8 0 amappl12 168 18282 0 18248 2 0 2 2 0 8 0 amappl11 160 52 0 41 1 0 1 1 0 8 0 amappl10 152 90 0 76 1 0 1 1 0 8 0 amappl9 144 362 0 361 33 32 1 2 0 8 0 amappl8 136 1033 0 823 8 0 8 8 0 8 0 amappl7 128 168 0 150 1 0 1 1 0 8 0 amappl6 120 625 0 598 2 1 1 2 0 8 0 amappl5 112 588 0 581 1 0 1 1 0 8 0 amappl4 104 1521 0 1476 2 0 2 2 0 8 0 amappl3 96 106316 0 106240 15 12 3 4 0 8 0 amappl2 88 18592 0 18519 4 2 2 3 0 8 0 amappl1 80 69595 0 69086 22 9 13 22 0 8 0 amappl 88 170804 0 170563 8 0 8 8 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 17273 0 17242 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 17273 0 17242 1 0 1 1 0 8 0 vmmpekpl 168 134384 0 134317 4 0 4 4 0 8 0 vmmpepl 168 1026734 0 1024310 331 206 125 136 0 357 2 vmsppl 464 17272 0 17242 7 2 5 6 0 8 0 rwobjpl 56 262129 0 254366 126 11 115 116 0 8 0 pdppl 4096 34554 0 34484 624 542 82 94 0 8 12 pvpl 32 5339364 0 5320685 654 466 188 329 0 265 1 pmappl 248 17272 0 17242 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2005 0 1076 27 0 27 27 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82c26ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82d06d78) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d06d78) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x23 cnputc(a) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(a) at db_putchar+0x4bd sys/ddb/db_output.c:168 kprintf() at kprintf+0x6bc sys/kern/subr_prf.c:724 db_printf(ffffffff82815f9d) at db_printf+0x89 sys/kern/subr_prf.c:498 panic(ffffffff8278a31d) at panic+0xdb sys/kern/subr_prf.c:216 vop_generic_badop(ffff800027b690e8) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd8058a82378,fffffd8067bc96f0) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd8067bc96f0) at bwrite+0x1f4 sys/kern/vfs_bio.c:760 end trace frame: 0xffff800027b691d0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82c26ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82d06d78) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d06d78) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x23 cnputc(a) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(a) at db_putchar+0x4bd sys/ddb/db_output.c:168 kprintf() at kprintf+0x6bc sys/kern/subr_prf.c:724 db_printf(ffffffff82815f9d) at db_printf+0x89 sys/kern/subr_prf.c:498 panic(ffffffff8278a31d) at panic+0xdb sys/kern/subr_prf.c:216 vop_generic_badop(ffff800027b690e8) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd8058a82378,fffffd8067bc96f0) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd8067bc96f0) at bwrite+0x1f4 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd8067bc96f0) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff800027b69380) at ufs_mkdir+0x6c4 sys/ufs/ufs/ufs_vnops.c:1235 VOP_MKDIR(fffffd8058a827b0,ffff800027b694e0,ffff800027b69510,ffff800027b69410) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff8000212a6b20,ffffff9c,200000c0,0) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3074 syscall(ffff800027b69690) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800027b69690) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8c553fa8ff0, count: -20 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82793a66) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82815067,ffffffff827d7bb8,2a3,ffffffff827ce857) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 end trace frame: 0x0, count: 11 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82793a66) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82815067,ffffffff827d7bb8,2a3,ffffffff827ce857) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 end trace frame: 0x0, count: -4