panic: vpaonip_cg:en keerrnice_bl a dop Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 180561 85604 32767 0x10 0x4000000 0 syz-executor.4 *142076 22349 32767 0x10 0 1 syz-executor.7 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82740948) at panic+0x177 sys/kern/subr_prf.c:198 vop_generic_badop(ffff8000295db538) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd80669d30f0,fffffd806730db78) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628 bwrite(fffffd806730db78) at bwrite+0x1f0 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd806730db78) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 ufs_mkdir(ffff8000295db7d0) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1236 VOP_MKDIR(fffffd806d9e37e0,ffff8000295db930,ffff8000295db960,ffff8000295db860) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff8000212bab18,ffffff9c,7f7ffffdd1b0,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 syscall(ffff8000295dbae0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295dbae0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdd220, count: 4 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: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 674 *cpu1: vop_generic_badop ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82740948) at panic+0x177 sys/kern/subr_prf.c:198 vop_generic_badop(ffff8000295db538) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd80669d30f0,fffffd806730db78) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628 bwrite(fffffd806730db78) at bwrite+0x1f0 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd806730db78) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 ufs_mkdir(ffff8000295db7d0) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1236 VOP_MKDIR(fffffd806d9e37e0,ffff8000295db930,ffff8000295db960,ffff8000295db860) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff8000212bab18,ffffff9c,7f7ffffdd1b0,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 syscall(ffff8000295dbae0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295dbae0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdd220, count: -11 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000295db460 rbx 0xffff800020d69b8f rdx 0 rcx 0 rax 0xffff8000212bab18 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf4a4e9f688c3cbcd r11 0x3656031b865eb6f8 r12 0xffff800020d69990 r13 0 r14 0 r15 0x1 rip 0xffffffff818c3858 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000295db450 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.7) pid=142076 stat=onproc flags process=10 proc=0 pri=17, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800021216b08,0xffff800021200b10 process=0xffff800027b71d68 user=0xffff8000295d6000, vmspace=0xfffffd8066bbc898 estcpu=36, cpticks=0, pctcpu=0.5 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 85604 334814 84290 32767 2 0x10 syz-executor.4 85604 180561 84290 32767 7 0x4000010 syz-executor.4 96154 12131 10336 32767 3 0x90 nanoslp syz-executor.2 96154 54910 10336 32767 3 0x4000090 fsleep syz-executor.2 96154 242462 10336 32767 3 0x4000090 fsleep syz-executor.2 50237 112032 71478 32767 2 0x10 syz-executor.3 50237 188625 71478 32767 3 0x4000090 piperd syz-executor.3 10676 51271 14893 32767 2 0x490 syz-executor.5 10676 60839 14893 32767 3 0x4000090 fifow syz-executor.5 10676 159989 14893 32767 3 0x4000090 fsleep syz-executor.5 25107 240889 32434 32767 2 0x490 syz-executor.6 25107 174398 32434 32767 2 0x4000010 syz-executor.6 25107 338550 32434 32767 3 0x4000090 fsleep syz-executor.6 14893 100187 44290 32767 2 0x490 syz-executor.5 44290 481614 93986 0 3 0x82 wait syz-executor.5 25338 53973 88437 32767 2 0x10 syz-executor.1 88437 517944 93986 0 3 0x82 wait syz-executor.1 21632 510320 0 0 3 0x14200 bored sosplice 71478 366688 98631 32767 2 0x490 syz-executor.3 98631 167422 93986 0 3 0x82 wait syz-executor.3 *22349 142076 86601 32767 7 0x10 syz-executor.7 32434 149971 60068 32767 2 0x490 syz-executor.6 86601 191637 93986 0 3 0x82 wait syz-executor.7 60068 488329 93986 0 3 0x82 wait syz-executor.6 84290 64769 59696 32767 2 0x490 syz-executor.4 59696 251124 93986 0 3 0x82 wait syz-executor.4 10336 250553 1651 32767 2 0x490 syz-executor.2 1651 290096 93986 0 3 0x82 wait syz-executor.2 10508 296446 43647 32767 2 0x10 syz-executor.0 43647 327167 93986 0 3 0x82 wait syz-executor.0 93986 384946 88551 0 3 0x82 kqread syz-fuzzer 93986 411834 88551 0 3 0x4000082 nanoslp syz-fuzzer 93986 134678 88551 0 3 0x4000082 wait syz-fuzzer 93986 498356 88551 0 3 0x4000082 thrsleep syz-fuzzer 93986 499811 88551 0 3 0x4000082 thrsleep syz-fuzzer 93986 245308 88551 0 3 0x4000082 wait syz-fuzzer 93986 192082 88551 0 3 0x4000082 thrsleep syz-fuzzer 93986 221198 88551 0 3 0x4000082 wait syz-fuzzer 93986 489438 88551 0 3 0x4000082 wait syz-fuzzer 93986 218523 88551 0 3 0x4000082 wait syz-fuzzer 93986 250085 88551 0 3 0x4000082 thrsleep syz-fuzzer 93986 507096 88551 0 3 0x4000082 wait syz-fuzzer 93986 86610 88551 0 3 0x4000082 wait syz-fuzzer 93986 108149 88551 0 3 0x4000082 wait syz-fuzzer 93986 437120 88551 0 3 0x4000082 thrsleep syz-fuzzer 93986 258237 88551 0 3 0x4000082 thrsleep syz-fuzzer 88551 152342 69147 0 3 0x10008a sigsusp ksh 69147 329453 43243 0 3 0x9a kqread sshd 21829 285584 1 0 3 0x100083 ttyin getty 43243 466391 1 0 3 0x88 kqread sshd 28977 222504 76785 73 3 0x1100090 kqread syslogd 76785 19692 1 0 3 0x100082 netio syslogd 31425 159738 1 0 3 0x100080 kqread resolvd 26887 52150 54471 77 3 0x100092 kqread dhcpleased 19090 136257 54471 77 3 0x100092 kqread dhcpleased 54471 20030 1 0 3 0x80 kqread dhcpleased 37643 204125 0 0 3 0x14200 bored smr 46710 416574 0 0 2 0x14200 zerothread 58888 4703 0 0 3 0x14200 aiodoned aiodoned 59633 144194 0 0 3 0x14200 syncer update 67861 247670 0 0 3 0x14200 cleaner cleaner 80529 174548 0 0 3 0x14200 reaper reaper 95852 350259 0 0 3 0x14200 pgdaemon pagedaemon 75536 128373 0 0 3 0x14200 bored viomb 95125 58059 0 0 3 0x40014200 acpi0 acpi0 63327 185910 0 0 3 0x40014200 idle1 93980 277087 0 0 3 0x14200 bored softnet 18090 7962 0 0 3 0x14200 bored softnet 39369 244513 0 0 3 0x14200 bored softnet 9081 509407 0 0 3 0x14200 bored softnet 72669 508147 0 0 3 0x14200 bored systqmp 50430 440237 0 0 3 0x14200 bored systq 93708 236054 0 0 2 0x40014200 softclock 90448 412284 0 0 3 0x40014200 idle0 1 407971 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 25107 (syz-executor.6) thread 0xffff800021217078 (174398) exclusive rwlock netlock r = 0 (0xffffffff82bf0230) #0 witness_lock+0x44d #1 soreceive+0x167 sys/kern/uipc_socket.c:836 #2 recvit+0x31b sys/kern/uipc_syscalls.c:1082 #3 sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 #4 syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] #4 syscall+0x606 sys/arch/amd64/amd64/trap.c:625 #5 Xsyscall+0x128 Process 25338 (syz-executor.1) thread 0xffff800021200590 (53973) exclusive rrwlock inode r = 0 (0xfffffd8074e3a700) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vn_closefile+0xc6 vn_close sys/kern/vfs_vnops.c:292 [inline] #5 vn_closefile+0xc6 sys/kern/vfs_vnops.c:609 #6 fdrop+0xc7 sys/kern/kern_descrip.c:1274 #7 closef+0x11c sys/kern/kern_descrip.c:1258 #8 syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x606 sys/arch/amd64/amd64/trap.c:625 #9 Xsyscall+0x128 Process 22349 (syz-executor.7) thread 0xffff8000212bab18 (142076) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82c2ca98) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3bb sys/kern/sched_bsd.c:405 #3 sleep_finish+0x180 sys/kern/kern_synch.c:417 #4 tsleep+0x12c sys/kern/kern_synch.c:155 #5 biowait+0x91 sys/kern/vfs_bio.c:1268 #6 bwrite+0x21b sys/kern/vfs_bio.c:769 #7 ffs_update+0x27d sys/ufs/ffs/ffs_inode.c:113 #8 ufs_mkdir+0x662 sys/ufs/ufs/ufs_vnops.c:1220 #9 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #10 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #11 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #11 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8074e3ae70) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x1fc 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+0x1be sys/ufs/ffs/ffs_alloc.c:394 #9 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #10 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #11 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #12 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #12 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80676965f0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10220 6412K 6421K 78643K 11326 0 pcb 13 12K 14K 78643K 17 0 rtable 236 6K 7K 78643K 807 0 ifaddr 73 24K 24K 78643K 107 0 sysctl 3 1K 1K 78643K 10 0 counters 60 35K 35K 78643K 70 0 ioctlops 0 0K 2K 78643K 149 0 iov 0 0K 32K 78643K 2829 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1272 79K 80K 78643K 1799 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 91 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 602 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 121K 78643K 5530 0 sigio 0 0K 0K 78643K 141 0 proc 56 78K 103K 78643K 808 0 subproc 104 6K 6K 78643K 169 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 2 0K 0K 78643K 519 0 in_multi 99 6K 7K 78643K 240 0 ether_multi 1 0K 0K 78643K 19 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 193 864K 864K 78643K 193 0 exec 0 0K 1K 78643K 1133 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 360 88K 984K 78643K 41201 0 UVM aobj 131 8K 8K 78643K 136 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 179 0 NDP 11 0K 2K 78643K 42 0 temp 124 5778K 5843K 78643K 16858 0 kqueue 12 18K 26K 78643K 534 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 120 381 0 378 3 2 1 2 0 8 0 rtentry 112 171 0 60 4 0 4 4 0 8 0 unpcb 144 6918 0 6902 52 46 6 10 0 8 5 syncache 296 68 0 68 12 11 1 1 0 8 1 tcpqe 32 75 0 75 11 10 1 1 0 8 1 tcpcb 776 6554 0 6507 113 104 9 17 0 8 4 arp 120 29 0 11 1 0 1 1 0 8 0 ipq 40 2 0 1 2 1 1 1 0 8 0 ipqe 40 8 0 7 2 1 1 1 0 8 0 inpcb 368 9551 0 9468 117 109 8 22 0 8 0 nd6 48 43 0 18 1 0 1 1 0 8 0 kcovpl 48 13 0 5 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 699 0 242 31 2 29 30 0 8 0 art_table 32 700 0 242 4 0 4 4 0 8 0 art_node 16 170 0 69 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 598 0 588 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 8322 0 6873 91 0 91 91 0 8 0 ffsino 272 8322 0 6873 98 0 98 98 0 8 0 nchpl 144 15760 0 14122 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 51405 0 51404 4 3 1 2 0 8 0 percpumem 16 48 0 5 1 0 1 1 0 8 0 kstatmem 264 32 0 10 2 0 2 2 0 8 0 scxspl 216 51761 0 51761 26 25 1 8 0 8 1 plimitpl 152 808 0 785 8 6 2 2 0 8 1 sigapl 424 5812 0 5760 7 0 7 7 0 8 0 futexpl 64 56223 0 56219 3 2 1 1 0 8 0 knotepl 120 722 0 0 18 0 18 18 0 8 0 kqueuepl 216 1531 0 1523 22 21 1 5 0 8 0 pipepl 320 1631 0 1602 46 38 8 8 0 8 5 fdescpl 496 5794 0 5760 7 2 5 6 0 8 0 filepl 152 42150 0 41844 75 57 18 19 0 8 6 lockfpl 104 506 0 504 1 0 1 1 0 8 0 lockfspl 48 186 0 184 1 0 1 1 0 8 0 sessionpl 144 28 0 12 1 0 1 1 0 8 0 pgrppl 48 151 0 135 1 0 1 1 0 8 0 ucredpl 104 5118 0 5100 1 0 1 1 0 8 0 zombiepl 144 5760 0 5760 1 0 1 1 0 8 1 processpl 1072 5812 0 5760 5 1 4 5 0 8 0 procpl 696 16709 0 16634 17 9 8 9 0 8 0 sosppl 168 94 0 94 7 6 1 1 0 8 1 sockpl 488 16996 0 16892 344 313 31 34 0 8 17 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 13 0 0 1 0 1 1 0 8 0 mcl8k 8192 26 0 0 3 0 3 3 0 8 0 mcl4k 4096 26 0 0 4 1 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 331 0 0 39 4 35 39 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 1280 0 0 66 0 66 66 0 8 0 bufpl 288 13330 0 7009 452 0 452 452 0 8 0 anonpl 24 1284988 0 1270864 175 69 106 120 0 186 0 amapchunkpl 152 344988 0 344182 4444 120 4324 4421 0 158 4288 amappl16 200 16654 0 16315 101 81 20 35 0 8 0 amappl15 192 7 0 6 1 0 1 1 0 8 0 amappl14 184 160 0 148 2 1 1 2 0 8 0 amappl13 176 21 0 20 1 0 1 1 0 8 0 amappl12 168 461 0 458 1 0 1 1 0 8 0 amappl11 160 46 0 36 1 0 1 1 0 8 0 amappl10 152 42 0 33 1 0 1 1 0 8 0 amappl9 144 993 0 993 6 5 1 1 0 8 1 amappl8 136 318 0 233 3 0 3 3 0 8 0 amappl7 128 186 0 163 2 0 2 2 0 8 0 amappl6 120 259 0 241 2 1 1 2 0 8 0 amappl5 112 234 0 227 1 0 1 1 0 8 0 amappl4 104 658 0 625 2 0 2 2 0 8 0 amappl3 96 17626 0 17565 2 0 2 2 0 8 0 amappl2 88 6636 0 6555 3 1 2 3 0 8 0 amappl1 80 135431 0 134637 26 8 18 26 0 8 0 amappl 88 40365 0 40149 8 2 6 6 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 72 135 0 5 3 0 3 3 0 8 0 uaddrrnd 24 5794 0 5760 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5794 0 5760 1 0 1 1 0 8 0 vmmpekpl 168 52887 0 52818 4 0 4 4 0 8 0 vmmpepl 168 547430 0 544561 204 66 138 147 0 357 3 vmsppl 440 5793 0 5760 5 0 5 5 0 8 0 rwobjpl 56 156581 0 148993 113 2 111 112 0 8 0 pdppl 4096 11595 0 11520 231 150 81 93 0 8 6 pvpl 32 2570092 0 2549187 391 204 187 360 0 265 0 pmappl 248 5793 0 5760 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1149 0 271 26 0 26 26 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82bc1ff0) at x86_ipi_db+0x1a 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 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x28 sys/arch/amd64/amd64/bus_space.c:654 comcnputc(800,64) at comcnputc+0x97 sys/dev/ic/com.c:1259 cnputc(64) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(64) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064 db_printf(ffffffff827ce835) at db_printf+0x85 sys/kern/subr_prf.c:498 panic(ffffffff8274c9bf) at panic+0xd7 sys/kern/subr_prf.c:216 __assert(ffffffff827cb2dd,ffffffff82789f75,2a2,ffffffff827822c6) at __assert+0x25 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x131 end trace frame: 0x0, count: 3 ddb{0}> trace x86_ipi_db(ffffffff82bc1ff0) at x86_ipi_db+0x1a 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 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x28 sys/arch/amd64/amd64/bus_space.c:654 comcnputc(800,64) at comcnputc+0x97 sys/dev/ic/com.c:1259 cnputc(64) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(64) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064 db_printf(ffffffff827ce835) at db_printf+0x85 sys/kern/subr_prf.c:498 panic(ffffffff8274c9bf) at panic+0xd7 sys/kern/subr_prf.c:216 __assert(ffffffff827cb2dd,ffffffff82789f75,2a2,ffffffff827822c6) at __assert+0x25 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x131 end trace frame: 0x0, count: -12 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82740948) at panic+0x177 sys/kern/subr_prf.c:198 vop_generic_badop(ffff8000295db538) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd80669d30f0,fffffd806730db78) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628 bwrite(fffffd806730db78) at bwrite+0x1f0 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd806730db78) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 ufs_mkdir(ffff8000295db7d0) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1236 VOP_MKDIR(fffffd806d9e37e0,ffff8000295db930,ffff8000295db960,ffff8000295db860) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff8000212bab18,ffffff9c,7f7ffffdd1b0,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 syscall(ffff8000295dbae0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295dbae0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdd220, count: 4 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82740948) at panic+0x177 sys/kern/subr_prf.c:198 vop_generic_badop(ffff8000295db538) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd80669d30f0,fffffd806730db78) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628 bwrite(fffffd806730db78) at bwrite+0x1f0 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd806730db78) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 ufs_mkdir(ffff8000295db7d0) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1236 VOP_MKDIR(fffffd806d9e37e0,ffff8000295db930,ffff8000295db960,ffff8000295db860) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff8000212bab18,ffffff9c,7f7ffffdd1b0,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 syscall(ffff8000295dbae0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295dbae0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdd220, count: -11