panic: Non dma-reachable buffer at curaddr 0xffff80002e8cc0c0(raw) Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *231833 85271 0 0x2 0 0 syz-executor.4 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ef538) at panic+0x165 sys/kern/subr_prf.c:198 _bus_dmamap_load_buffer(ffff80002e8cc150,ffff80000018dc00,ffff80000d4af000,800,0,401,c673ff85b0c2a718,800,ffff80000018dc00) at _bus_dmamap_load_buffer+0x386 sys/arch/amd64/amd64/bus_dma.c:589 _bus_dmamap_load(ffffffff82bdfdf0,ffff80000018dc00,ffff80000d4af000,800,0,401) at _bus_dmamap_load+0x9b sys/arch/amd64/amd64/bus_dma.c:179 vioscsi_scsi_cmd(fffffd8067d05a60) at vioscsi_scsi_cmd+0x1b0 sys/dev/pv/vioscsi.c:220 sdstart(fffffd8067d05a60) at sdstart+0x40e sys/scsi/sd.c:709 scsi_iopool_run(ffff8000000a2048) at scsi_iopool_run+0x10a scsi_ioh_pending sys/scsi/scsi_base.c:407 [inline] scsi_iopool_run(ffff8000000a2048) at scsi_iopool_run+0x10a sys/scsi/scsi_base.c:423 scsi_xsh_runqueue(ffff80000002f800) at scsi_xsh_runqueue+0x203 sys/scsi/scsi_base.c:600 scsi_xsh_add(ffff800000024b80) at scsi_xsh_add+0xcd sys/scsi/scsi_base.c:538 sdstrategy(fffffd805a678b80) at sdstrategy+0x187 sys/scsi/sd.c:567 spec_strategy(ffff80002e8cc418) at spec_strategy+0x79 sys/kern/spec_vnops.c:451 VOP_STRATEGY(fffffd807efcfaf8,fffffd805a678b80) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 ufs_strategy(ffff80002e8cc4c8) at ufs_strategy+0x15e VOP_STRATEGY(fffffd807222bb50,fffffd805a678b80) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 end trace frame: 0xffff80002e8cc570, count: 0 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: Non dma-reachable buffer at curaddr 0xffff80002e8cc0c0(raw) ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ef538) at panic+0x165 sys/kern/subr_prf.c:198 _bus_dmamap_load_buffer(ffff80002e8cc150,ffff80000018dc00,ffff80000d4af000,800,0,401,c673ff85b0c2a718,800,ffff80000018dc00) at _bus_dmamap_load_buffer+0x386 sys/arch/amd64/amd64/bus_dma.c:589 _bus_dmamap_load(ffffffff82bdfdf0,ffff80000018dc00,ffff80000d4af000,800,0,401) at _bus_dmamap_load+0x9b sys/arch/amd64/amd64/bus_dma.c:179 vioscsi_scsi_cmd(fffffd8067d05a60) at vioscsi_scsi_cmd+0x1b0 sys/dev/pv/vioscsi.c:220 sdstart(fffffd8067d05a60) at sdstart+0x40e sys/scsi/sd.c:709 scsi_iopool_run(ffff8000000a2048) at scsi_iopool_run+0x10a scsi_ioh_pending sys/scsi/scsi_base.c:407 [inline] scsi_iopool_run(ffff8000000a2048) at scsi_iopool_run+0x10a sys/scsi/scsi_base.c:423 scsi_xsh_runqueue(ffff80000002f800) at scsi_xsh_runqueue+0x203 sys/scsi/scsi_base.c:600 scsi_xsh_add(ffff800000024b80) at scsi_xsh_add+0xcd sys/scsi/scsi_base.c:538 sdstrategy(fffffd805a678b80) at sdstrategy+0x187 sys/scsi/sd.c:567 spec_strategy(ffff80002e8cc418) at spec_strategy+0x79 sys/kern/spec_vnops.c:451 VOP_STRATEGY(fffffd807efcfaf8,fffffd805a678b80) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 ufs_strategy(ffff80002e8cc4c8) at ufs_strategy+0x15e VOP_STRATEGY(fffffd807222bb50,fffffd805a678b80) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd805a678b80) at bwrite+0x1eb sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd805a678b80) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002e8cc760) at ufs_mkdir+0x6c4 sys/ufs/ufs/ufs_vnops.c:1235 VOP_MKDIR(fffffd80736ab978,ffff80002e8cc8c0,ffff80002e8cc8f0,ffff80002e8cc7f0) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff800024b71550,ffffff9c,7891bcd397d0,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 syscall(ffff80002e8cca70) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7891bcd39840, count: -21 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002e8cbfd0 rbx 0 rdx 0 rcx 0 rax 0xffff800024b71550 r8 0x101010101010101 r9 0x8080808080808080 r10 0x7567d32a07cb5e93 r11 0x36bdabecaeb223f9 r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff821011dc db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002e8cbfc0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb> show proc PROC (syz-executor.4) tid=231833 pid=85271 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=83, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff800024b71000,0xffff800021688570 process=0xffff8000ffff5b90 user=0xffff80002e8c7000, vmspace=0xfffffd8073a2ea38 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 77961 228152 80343 0 2 0 syz-executor.1 77961 127992 80343 0 2 0x4000000 syz-executor.1 77961 45516 80343 0 2 0x4000000 syz-executor.1 77961 409673 80343 0 2 0x4000000 syz-executor.1 5357 327003 24369 0 2 0x480 syz-executor.0 5357 466684 24369 0 3 0x4000080 fifor syz-executor.0 5357 164858 24369 0 3 0x4000080 fsleep syz-executor.0 5357 146712 24369 0 3 0x4000080 fsleep syz-executor.0 55601 11622 62588 0 2 0 syz-executor.7 55601 331426 62588 0 3 0x4000080 fsleep syz-executor.7 55601 307018 62588 0 3 0x4000080 fsleep syz-executor.7 10242 395098 46395 0 2 0 syz-executor.6 10242 182625 46395 0 3 0x4000080 netcon syz-executor.6 10242 452041 46395 0 3 0x4000080 bell syz-executor.6 36389 360914 1054 0 2 0x2 syz-executor.2 *85271 231833 1054 0 7 0x2 syz-executor.4 35269 182814 1054 0 2 0x2 syz-executor.5 85114 413044 0 0 3 0x14280 nfsidl nfsio 7629 420768 0 0 3 0x14280 nfsidl nfsio 87431 176944 0 0 3 0x14280 nfsidl nfsio 77080 294667 0 0 3 0x14280 nfsidl nfsio 41167 262903 0 0 3 0x14280 nfsidl nfsio 57843 183202 0 0 3 0x14280 nfsidl nfsio 7069 13618 0 0 3 0x14280 nfsidl nfsio 58161 340254 0 0 3 0x14280 nfsidl nfsio 97561 493738 0 0 3 0x14280 nfsidl nfsio 68959 190816 0 0 3 0x14280 nfsidl nfsio 8805 334756 0 0 3 0x14280 nfsidl nfsio 60494 104311 0 0 3 0x14280 nfsidl nfsio 13429 194197 0 0 3 0x14280 nfsidl nfsio 44207 474504 0 0 3 0x14280 nfsidl nfsio 96287 158428 0 0 3 0x14280 nfsidl nfsio 27423 110396 0 0 3 0x14280 nfsidl nfsio 95178 374095 0 0 3 0x14280 nfsidl nfsio 31566 242521 0 0 3 0x14280 nfsidl nfsio 57399 296886 0 0 3 0x14280 nfsidl nfsio 25940 36855 0 0 3 0x14280 nfsidl nfsio 24369 351616 1054 0 2 0x482 syz-executor.0 80343 283636 1054 0 2 0x482 syz-executor.1 78860 197586 1054 0 2 0x482 syz-executor.3 46395 18237 1054 0 2 0x482 syz-executor.6 83842 518852 1 0 3 0x100083 ttyin getty 96967 403358 0 0 3 0x14200 acct acct 68270 400861 0 0 3 0x14200 bored sosplice 62588 323089 1054 0 2 0x482 syz-executor.7 1054 29204 74907 0 3 0x2000082 thrsleep syz-fuzzer 1054 158775 74907 0 2 0x6000482 syz-fuzzer 1054 323213 74907 0 3 0x6000082 wait syz-fuzzer 1054 444458 74907 0 3 0x6000082 wait syz-fuzzer 1054 499428 74907 0 3 0x6000082 thrsleep syz-fuzzer 1054 227790 74907 0 3 0x6000082 wait syz-fuzzer 1054 72920 74907 0 3 0x6000082 kqread syz-fuzzer 1054 353462 74907 0 3 0x6000082 wait syz-fuzzer 1054 508257 74907 0 3 0x6000082 wait syz-fuzzer 1054 238440 74907 0 3 0x6000082 wait syz-fuzzer 1054 149948 74907 0 3 0x6000082 thrsleep syz-fuzzer 1054 117666 74907 0 3 0x6000082 wait syz-fuzzer 1054 44524 74907 0 3 0x6000082 thrsleep syz-fuzzer 1054 308715 74907 0 3 0x6000082 wait syz-fuzzer 74907 441296 10604 0 3 0x10008a sigsusp ksh 10604 26737 6853 0 3 0x9a kqread sshd 6853 152454 1 0 3 0x88 kqread sshd 96146 116859 37072 73 3 0x1100090 kqread syslogd 37072 476040 1 0 3 0x100082 netio syslogd 17928 96888 1 0 3 0x100080 kqread resolvd 71644 402808 65412 77 3 0x100092 kqread dhcpleased 78416 348723 65412 77 3 0x100092 kqread dhcpleased 65412 201989 1 0 3 0x80 kqread dhcpleased 79456 189287 0 0 3 0x14200 bored smr 86783 211093 0 0 2 0x14200 zerothread 87453 294161 0 0 3 0x14200 aiodoned aiodoned 8719 46506 0 0 3 0x14200 syncer update 11290 118525 0 0 3 0x14200 cleaner cleaner 55585 114758 0 0 3 0x14200 reaper reaper 57700 149228 0 0 3 0x14200 pgdaemon pagedaemon 57804 74297 0 0 3 0x14200 bored viomb 64820 173345 0 0 3 0x40014200 acpi0 acpi0 15131 289861 0 0 3 0x14200 bored softnet3 79972 141596 0 0 3 0x14200 bored softnet2 53279 169781 0 0 3 0x14200 bored softnet1 9729 140636 0 0 3 0x14200 bored softnet0 1083 94571 0 0 3 0x14200 bored systqmp 34640 422036 0 0 3 0x14200 bored systq 42935 187219 0 0 2 0x40014200 softclock 25555 564 0 0 3 0x40014200 idle0 1 238086 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10205 6417K 7451K 78643K 33270 0 pcb 13 16K 18K 78643K 538 0 rtable 246 15K 15K 78643K 1068 0 pf 29 8K 9K 78643K 150 0 ifaddr 43 12K 12K 78643K 155 0 ifgroup 50 2K 2K 78643K 251 0 sysctl 4 1K 1K 78643K 5 0 counters 28 17K 17K 78643K 81 0 ioctlops 0 0K 2K 78643K 441 0 iov 0 0K 36K 78643K 887 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1469 92K 92K 78643K 7935 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 113 0 VM map 2 1K 1K 78643K 2 0 sem 10 1K 1K 78643K 23 0 dirhash 12 2K 2K 78643K 21 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 14 49K 69K 78643K 14965 0 sigio 0 0K 0K 78643K 103 0 proc 58 59K 83K 78643K 1552 0 subproc 104 6K 6K 78643K 327 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 276 0 in_multi 99 7K 7K 78643K 370 0 ether_multi 1 0K 0K 78643K 8 0 mrt 0 0K 0K 78643K 7 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 247 1102K 1102K 78643K 247 0 exec 0 0K 1K 78643K 1154 0 pfkey data 0 0K 0K 78643K 1 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 479 238K 242K 78643K 137505 0 UVM aobj 131 4K 4K 78643K 147 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 247 0 NDP 11 0K 2K 78643K 114 0 temp 75 5916K 6044K 78643K 320394 0 kqueue 13 20K 26K 78643K 459 0 SYN cache 2 2456K 2464K 78643K 4 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 295 0 292 3 2 1 3 0 8 0 rtentry 112 309 0 196 4 0 4 4 0 8 0 unpcb 144 9227 0 9204 113 112 1 10 0 8 0 syncache 312 112 0 112 19 19 0 1 0 8 0 tcpqe 32 517 0 517 15 15 0 1 0 8 0 tcpcb 808 2855 0 2845 84 82 2 11 0 8 0 arp 88 54 0 35 1 0 1 1 0 8 0 ipq 40 11 0 11 4 4 0 1 0 8 0 ipqe 40 25 0 25 4 4 0 1 0 8 0 inpcb 336 9877 0 9860 191 189 2 13 0 8 0 nd6 104 82 0 56 1 0 1 1 0 8 0 pkpcb 40 139 0 139 4 4 0 2 0 8 0 kcovpl 48 25 0 17 1 0 1 1 0 8 0 ppxss 1160 13 0 13 5 5 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1238 0 772 30 0 30 30 0 8 0 art_table 32 1239 0 772 4 0 4 4 0 8 0 art_node 16 306 0 203 1 0 1 1 0 8 0 sysvmsgpl 40 45 0 26 3 2 1 1 0 8 0 semupl 112 8 0 8 1 1 0 1 0 8 0 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 144 0 16 4 0 4 4 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 20431 0 18756 105 0 105 105 0 8 0 ffsino 240 20431 0 18756 99 0 99 99 0 8 0 nchpl 144 40939 0 39303 63 0 63 63 0 8 0 uvmvnodes 80 7235 0 0 148 0 148 148 0 8 0 vnodes 216 7235 0 0 402 0 402 402 0 8 0 namei 1024 130997 0 130994 20 19 1 3 0 8 0 vcpupl 2048 38 0 2 5 0 5 5 0 8 0 vmpool 664 45 0 9 3 0 3 3 0 8 0 kstatmem 264 128 0 106 2 0 2 2 0 8 0 scxspl 216 124722 0 124721 22 21 1 8 1 8 0 plimitpl 152 2393 0 2378 1 0 1 1 0 8 0 sigapl 424 15252 0 15188 8 0 8 8 0 8 0 futexpl 64 117045 0 117041 10 9 1 1 0 8 0 knotepl 120 132606 0 132526 34 31 3 18 0 8 0 kqueuepl 184 1164 0 1155 16 15 1 7 0 8 0 pipepl 288 1751 0 1723 44 41 3 7 0 8 1 fdescpl 432 15214 0 15189 4 0 4 4 0 8 0 filepl 120 76024 0 75774 145 136 9 15 0 8 0 lockfpl 104 3087 0 3082 6 5 1 2 0 8 0 lockfspl 48 1224 0 1219 1 0 1 1 0 8 0 sessionpl 144 43 0 27 1 0 1 1 0 8 0 pgrppl 48 131 0 115 1 0 1 1 0 8 0 ucredpl 104 10057 0 10046 1 0 1 1 0 8 0 zombiepl 144 15189 0 15188 4 3 1 1 0 8 0 processpl 1008 15252 0 15188 10 1 9 9 0 8 0 procpl 680 36724 0 36637 20 12 8 9 0 8 0 sosppl 168 594 0 591 32 31 1 1 0 8 0 sockpl 456 19539 0 19499 554 549 5 35 0 8 0 mcl64k 65536 463 0 463 43 42 1 1 0 8 1 mcl16k 16384 207 0 207 39 38 1 1 0 8 1 mcl12k 12288 576 0 572 39 38 1 1 0 8 0 mcl9k 9216 208 0 208 46 45 1 1 0 8 1 mcl8k 8192 656 0 656 43 42 1 1 0 8 1 mcl4k 4096 1070 0 1070 41 40 1 1 0 8 1 mcl2k2 2112 99 0 99 36 35 1 1 0 8 1 mcl2k 2048 69609 0 69504 138 122 16 20 0 8 1 mtagpl 96 1542 0 1135 19 5 14 17 0 8 0 mbufpl 256 226215 0 225069 278 203 75 92 0 8 0 bufpl 288 29261 0 22025 517 0 517 517 0 8 0 anonpl 24 1271625 0 1260563 251 171 80 95 0 188 0 amapchunkpl 152 431006 0 430279 144 112 32 43 0 158 1 amappl16 200 25342 0 24987 179 160 19 34 0 8 0 amappl14 184 195 0 182 2 1 1 2 0 8 0 amappl13 176 1 0 0 1 0 1 1 0 8 0 amappl12 168 16081 0 16050 2 0 2 2 0 8 0 amappl11 160 40 0 30 1 0 1 1 0 8 0 amappl10 152 34 0 24 2 1 1 1 0 8 0 amappl9 144 76 0 74 1 0 1 1 0 8 0 amappl8 136 785 0 604 7 0 7 7 0 8 0 amappl7 128 216 0 194 2 0 2 2 0 8 0 amappl6 120 595 0 576 1 0 1 1 0 8 0 amappl5 112 346 0 337 1 0 1 1 0 8 0 amappl4 104 704 0 672 2 1 1 2 0 8 0 amappl3 96 87139 0 87050 3 0 3 3 0 8 0 amappl2 88 16174 0 16096 3 1 2 3 0 8 0 amappl1 80 61737 0 61229 22 10 12 22 0 8 0 amappl 88 136516 0 136298 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 72 146 0 16 3 0 3 3 0 8 0 uaddrrnd 24 15259 0 15198 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 15259 0 15198 1 0 1 1 0 8 0 vmmpekpl 168 96928 0 96860 4 0 4 4 0 8 0 vmmpepl 168 869538 0 867312 335 226 109 122 0 357 0 vmsppl 368 15258 0 15198 6 0 6 6 0 8 0 rwobjpl 24 201634 0 192774 60 6 54 55 0 8 0 pdppl 4096 30524 0 30432 835 735 100 100 0 8 8 pvpl 32 4253628 0 4236945 543 395 148 321 0 265 0 pmappl 216 15258 0 15198 5 1 4 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2564 0 1586 29 1 28 28 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ef538) at panic+0x165 sys/kern/subr_prf.c:198 _bus_dmamap_load_buffer(ffff80002e8cc150,ffff80000018dc00,ffff80000d4af000,800,0,401,c673ff85b0c2a718,800,ffff80000018dc00) at _bus_dmamap_load_buffer+0x386 sys/arch/amd64/amd64/bus_dma.c:589 _bus_dmamap_load(ffffffff82bdfdf0,ffff80000018dc00,ffff80000d4af000,800,0,401) at _bus_dmamap_load+0x9b sys/arch/amd64/amd64/bus_dma.c:179 vioscsi_scsi_cmd(fffffd8067d05a60) at vioscsi_scsi_cmd+0x1b0 sys/dev/pv/vioscsi.c:220 sdstart(fffffd8067d05a60) at sdstart+0x40e sys/scsi/sd.c:709 scsi_iopool_run(ffff8000000a2048) at scsi_iopool_run+0x10a scsi_ioh_pending sys/scsi/scsi_base.c:407 [inline] scsi_iopool_run(ffff8000000a2048) at scsi_iopool_run+0x10a sys/scsi/scsi_base.c:423 scsi_xsh_runqueue(ffff80000002f800) at scsi_xsh_runqueue+0x203 sys/scsi/scsi_base.c:600 scsi_xsh_add(ffff800000024b80) at scsi_xsh_add+0xcd sys/scsi/scsi_base.c:538 sdstrategy(fffffd805a678b80) at sdstrategy+0x187 sys/scsi/sd.c:567 spec_strategy(ffff80002e8cc418) at spec_strategy+0x79 sys/kern/spec_vnops.c:451 VOP_STRATEGY(fffffd807efcfaf8,fffffd805a678b80) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 ufs_strategy(ffff80002e8cc4c8) at ufs_strategy+0x15e VOP_STRATEGY(fffffd807222bb50,fffffd805a678b80) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd805a678b80) at bwrite+0x1eb sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd805a678b80) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002e8cc760) at ufs_mkdir+0x6c4 sys/ufs/ufs/ufs_vnops.c:1235 VOP_MKDIR(fffffd80736ab978,ffff80002e8cc8c0,ffff80002e8cc8f0,ffff80002e8cc7f0) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff800024b71550,ffffff9c,7891bcd397d0,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 syscall(ffff80002e8cca70) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7891bcd39840, count: -21 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ef538) at panic+0x165 sys/kern/subr_prf.c:198 _bus_dmamap_load_buffer(ffff80002e8cc150,ffff80000018dc00,ffff80000d4af000,800,0,401,c673ff85b0c2a718,800,ffff80000018dc00) at _bus_dmamap_load_buffer+0x386 sys/arch/amd64/amd64/bus_dma.c:589 _bus_dmamap_load(ffffffff82bdfdf0,ffff80000018dc00,ffff80000d4af000,800,0,401) at _bus_dmamap_load+0x9b sys/arch/amd64/amd64/bus_dma.c:179 vioscsi_scsi_cmd(fffffd8067d05a60) at vioscsi_scsi_cmd+0x1b0 sys/dev/pv/vioscsi.c:220 sdstart(fffffd8067d05a60) at sdstart+0x40e sys/scsi/sd.c:709 scsi_iopool_run(ffff8000000a2048) at scsi_iopool_run+0x10a scsi_ioh_pending sys/scsi/scsi_base.c:407 [inline] scsi_iopool_run(ffff8000000a2048) at scsi_iopool_run+0x10a sys/scsi/scsi_base.c:423 scsi_xsh_runqueue(ffff80000002f800) at scsi_xsh_runqueue+0x203 sys/scsi/scsi_base.c:600 scsi_xsh_add(ffff800000024b80) at scsi_xsh_add+0xcd sys/scsi/scsi_base.c:538 sdstrategy(fffffd805a678b80) at sdstrategy+0x187 sys/scsi/sd.c:567 spec_strategy(ffff80002e8cc418) at spec_strategy+0x79 sys/kern/spec_vnops.c:451 VOP_STRATEGY(fffffd807efcfaf8,fffffd805a678b80) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 ufs_strategy(ffff80002e8cc4c8) at ufs_strategy+0x15e VOP_STRATEGY(fffffd807222bb50,fffffd805a678b80) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd805a678b80) at bwrite+0x1eb sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd805a678b80) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002e8cc760) at ufs_mkdir+0x6c4 sys/ufs/ufs/ufs_vnops.c:1235 VOP_MKDIR(fffffd80736ab978,ffff80002e8cc8c0,ffff80002e8cc8f0,ffff80002e8cc7f0) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff800024b71550,ffffff9c,7891bcd397d0,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 syscall(ffff80002e8cca70) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7891bcd39840, count: -21