uvm_fault(0xffffffff82bb2998, 0xffff80001d13fc03, 0, 2) -> d kernel: page fault trap, code=0 Stopped at memset+0x45: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND 54691 25250 0 0 0x4000000 0 syz-executor.2 *180513 8387 0 0x2 0x1 1K syz-executor.0 memset() at memset+0x45 ffs_write(ffff8000235aca20) at ffs_write+0x93c VOP_WRITE(fffffd807d9ce510,ffff8000235acad8,3,fffffd807f7d76e8) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002e490d30,fffffd807d9ce510,fffffd807f7d76e8,ffff8000235acbb8,ffff8000235acb80) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:660 ktrsysret(ffff80002e490d30,5b,0,ffff8000235accb0) at ktrsysret+0x18c ktrwrite2 sys/kern/kern_ktrace.c:625 [inline] ktrsysret(ffff80002e490d30,5b,0,ffff8000235accb0) at ktrsysret+0x18c sys/kern/kern_ktrace.c:207 syscall(ffff8000235acd30) at syscall+0x5d0 mi_syscall_return sys/sys/syscall_mi.h:131 [inline] syscall(ffff8000235acd30) at syscall+0x5d0 sys/arch/amd64/amd64/trap.c:620 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdeb80, count: 8 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 *cpu1: uvm_fault(0xffffffff82bb2998, 0xffff80001d13fc03, 0, 2) -> d ddb{1}> trace memset() at memset+0x45 ffs_write(ffff8000235aca20) at ffs_write+0x93c VOP_WRITE(fffffd807d9ce510,ffff8000235acad8,3,fffffd807f7d76e8) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002e490d30,fffffd807d9ce510,fffffd807f7d76e8,ffff8000235acbb8,ffff8000235acb80) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:660 ktrsysret(ffff80002e490d30,5b,0,ffff8000235accb0) at ktrsysret+0x18c ktrwrite2 sys/kern/kern_ktrace.c:625 [inline] ktrsysret(ffff80002e490d30,5b,0,ffff8000235accb0) at ktrsysret+0x18c sys/kern/kern_ktrace.c:207 syscall(ffff8000235acd30) at syscall+0x5d0 mi_syscall_return sys/sys/syscall_mi.h:131 [inline] syscall(ffff8000235acd30) at syscall+0x5d0 sys/arch/amd64/amd64/trap.c:620 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdeb80, count: -7 ddb{1}> show registers rdi 0xffff80001d13fc03 rsi 0 rbp 0xffff8000235ac940 rbx 0x1 rdx 0x5 rcx 0x5 rax 0 r8 0x3f8 r9 0xffff8000235ac898 r10 0x7e32d81caf3e7bb4 r11 0xffff80001d13fc03 r12 0xc03 r13 0xfffffd806d7f0ac0 r14 0x1000 __ALIGN_SIZE r15 0xfffffd806d7f0aa8 rip 0xffffffff817226f5 memset+0x45 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000235ac748 ss 0 memset+0x45: repe stosb %es:(%rdi) ddb{1}> show proc PROC (syz-executor.0) pid=180513 stat=onproc flags process=2 proc=1 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff80002e4c2fd0,0xffff80002e490aa0 process=0xffff80002e520020 user=0xffff8000235a7000, vmspace=0xfffffd80675b3478 estcpu=36, cpticks=1, pctcpu=0.3 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49754 159435 8387 0 2 0 syz-executor.0 49754 503337 8387 0 2 0x4000000 syz-executor.0 25250 31864 60246 0 2 0 syz-executor.2 25250 54691 60246 0 7 0x4000000 syz-executor.2 25250 500642 60246 0 3 0x4000080 fsleep syz-executor.2 10854 467113 68989 0 2 0 syz-executor.4 10854 314026 68989 0 3 0x4000080 fsleep syz-executor.4 10854 469512 68989 0 2 0x4000000 syz-executor.4 301 379468 35717 0 2 0 syz-executor.7 301 8480 35717 0 3 0x4000080 fsleep syz-executor.7 73614 218211 51686 0 2 0 syz-executor.3 73614 79840 51686 0 2 0x4000000 syz-executor.3 * 8387 180513 77502 0 7 0x3 syz-executor.0 68989 38187 77502 0 2 0x482 syz-executor.4 88142 453041 77502 0 2 0x482 syz-executor.6 80136 495284 1 0 3 0 vmmaplk syz-executor.0 80136 302006 1 0 3 0x4000000 vmmaplk syz-executor.0 51686 347192 77502 0 2 0x482 syz-executor.3 52917 133627 1 0 3 0x100083 ttyin getty 60246 270151 77502 0 2 0x482 syz-executor.2 7069 495655 77502 0 2 0x482 syz-executor.1 35717 21642 77502 0 2 0x482 syz-executor.7 11951 49367 77502 0 2 0x482 syz-executor.5 48754 277990 0 0 3 0x14280 nfsidl nfsio 93564 264798 0 0 3 0x14280 nfsidl nfsio 63599 167926 0 0 3 0x14280 nfsidl nfsio 16975 207934 0 0 3 0x14280 nfsidl nfsio 42086 347109 0 0 3 0x14280 nfsidl nfsio 4381 28563 0 0 3 0x14280 nfsidl nfsio 68462 259356 0 0 3 0x14280 nfsidl nfsio 60925 28788 0 0 3 0x14280 nfsidl nfsio 77706 181184 0 0 3 0x14280 nfsidl nfsio 41817 120997 0 0 3 0x14280 nfsidl nfsio 1407 409848 0 0 3 0x14280 nfsidl nfsio 53378 367525 0 0 3 0x14280 nfsidl nfsio 55212 269760 0 0 3 0x14280 nfsidl nfsio 69706 25084 0 0 3 0x14280 nfsidl nfsio 95313 75198 0 0 3 0x14280 nfsidl nfsio 10279 401344 0 0 3 0x14280 nfsidl nfsio 94385 265875 0 0 3 0x14280 nfsidl nfsio 65278 414659 0 0 3 0x14280 nfsidl nfsio 47712 49230 0 0 3 0x14280 nfsidl nfsio 21650 33245 0 0 3 0x14280 nfsidl nfsio 73632 489315 0 0 3 0x14200 bored sosplice 77502 100277 17770 0 3 0x82 thrsleep syz-fuzzer 77502 98975 17770 0 3 0x4000082 nanoslp syz-fuzzer 77502 439012 17770 0 3 0x4000082 thrsleep syz-fuzzer 77502 45192 17770 0 3 0x4000082 wait syz-fuzzer 77502 342996 17770 0 3 0x4000082 kqread syz-fuzzer 77502 342200 17770 0 3 0x4000082 wait syz-fuzzer 77502 84681 17770 0 3 0x4000082 wait syz-fuzzer 77502 494064 17770 0 3 0x4000082 wait syz-fuzzer 77502 172745 17770 0 3 0x4000082 thrsleep syz-fuzzer 77502 228787 17770 0 3 0x4000082 wait syz-fuzzer 77502 450193 17770 0 3 0x4000082 wait syz-fuzzer 77502 359312 17770 0 3 0x4000082 wait syz-fuzzer 77502 93469 17770 0 3 0x4000082 thrsleep syz-fuzzer 77502 447838 17770 0 3 0x4000082 thrsleep syz-fuzzer 77502 439523 17770 0 3 0x4000082 wait syz-fuzzer 77502 156361 17770 0 3 0x4000082 thrsleep syz-fuzzer 17770 272760 35985 0 3 0x10008a sigsusp ksh 35985 116024 6159 0 3 0x9a kqread sshd 6159 195217 1 0 3 0x88 kqread sshd 6146 153882 57666 74 3 0x1100092 bpf pflogd 57666 454065 1 0 3 0x80 netio pflogd 3971 329087 37699 73 3 0x1100090 kqread syslogd 37699 186973 1 0 3 0x100082 netio syslogd 91999 474743 1 0 3 0x100080 kqread resolvd 80535 404126 64524 77 3 0x100092 kqread dhcpleased 3706 19509 64524 77 3 0x100092 kqread dhcpleased 64524 312995 1 0 3 0x80 kqread dhcpleased 19138 519995 0 0 3 0x14200 bored smr 12387 501082 0 0 2 0x14200 zerothread 40048 230993 0 0 3 0x14200 aiodoned aiodoned 86982 492720 0 0 3 0x14200 syncer update 46981 395930 0 0 3 0x14200 cleaner cleaner 23779 388104 0 0 3 0x14200 reaper reaper 77263 429461 0 0 3 0x14200 pgdaemon pagedaemon 38291 292562 0 0 3 0x14200 bored viomb 99000 522936 0 0 3 0x40014200 acpi0 acpi0 86209 334138 0 0 3 0x40014200 idle1 21631 233918 0 0 3 0x14200 bored softnet 49554 107853 0 0 3 0x14200 bored softnet 63472 39576 0 0 3 0x14200 bored softnet 6411 97186 0 0 3 0x14200 bored softnet 50002 352693 0 0 3 0x14200 bored systqmp 34006 152649 0 0 3 0x14200 bored systq 96344 383524 0 0 3 0x40014200 bored softclock 83825 3880 0 0 3 0x40014200 idle0 1 52922 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10237 6575K 7673K 78643K 35403 0 pcb 13 16K 21K 78643K 2623 0 rtable 185 9K 11K 78643K 3113 0 ifaddr 117 28K 29K 78643K 1244 0 sysctl 3 1K 2K 78643K 10 0 counters 60 35K 36K 78643K 794 0 ioctlops 0 0K 4K 78643K 2925 0 iov 0 0K 28K 78643K 1168 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1502 94K 94K 78643K 13130 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 84 0 VM map 2 1K 1K 78643K 2 0 sem 25 5K 6K 78643K 741 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 93K 78643K 10056 0 sigio 0 0K 0K 78643K 243 0 proc 71 91K 116K 78643K 2668 0 subproc 117 7K 8K 78643K 933 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 428 0 in_multi 76 5K 6K 78643K 1027 0 ether_multi 1 0K 0K 78643K 51 0 mrt 1 0K 0K 78643K 44 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 199 890K 890K 78643K 199 0 exec 0 0K 1K 78643K 2333 0 pfkey data 0 0K 0K 78643K 5 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 546 759K 760K 78643K 70309 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 264 0 NDP 15 0K 1K 78643K 407 0 temp 158 4695K 5718K 78643K 100234 0 kqueue 12 18K 28K 78643K 760 0 SYN cache 2 20K 28K 78643K 3 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 120 853 0 850 11 10 1 3 0 8 0 rtentry 112 1000 0 923 4 1 3 4 0 8 0 unpcb 144 7870 0 7855 85 79 6 8 0 8 5 syncache 296 34 0 34 10 10 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 304 0 304 7 7 0 2 0 8 0 tcpcb 776 1896 0 1891 79 78 1 8 0 8 0 arp 120 149 0 135 1 0 1 1 0 8 0 inpcb 368 13694 0 13685 147 139 8 17 0 8 7 nd6 48 227 0 209 1 0 1 1 0 8 0 pkpcb 40 27 0 27 5 5 0 1 0 8 0 kcovpl 48 69 0 60 1 0 1 1 0 8 0 mppekey 1024 11 0 11 3 2 1 1 0 8 1 ppxss 1256 236 0 236 12 11 1 1 0 8 1 pppxif 1448 98 0 98 10 9 1 1 0 8 1 pfstscr 40 114 0 114 5 5 0 1 0 8 0 pffrag 232 27 0 26 5 4 1 1 0 482 0 pffrnode 88 27 0 26 5 4 1 1 0 8 0 pffrent 40 66 0 65 5 4 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfanchor 1280 344 0 81 27 5 22 22 0 8 0 pfqueue 264 7 0 7 3 2 1 1 0 8 1 pfstitem 24 234 0 231 1 0 1 1 0 8 0 pfstkey 120 380 0 372 3 2 1 2 0 8 0 pfstate 384 301 0 298 7 6 1 5 0 8 0 pfrule 1344 21 0 20 2 1 1 2 0 8 0 rttmr 136 13 0 13 5 5 0 1 0 8 0 art_heap8 4096 4 0 3 4 3 1 2 0 8 0 art_heap4 256 4467 0 4106 48 23 25 30 0 8 1 art_table 32 4471 0 4109 4 0 4 4 0 8 0 art_node 16 967 0 900 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 734 0 711 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 14017 0 12525 94 0 94 94 0 8 0 ffsino 272 14017 0 12525 100 0 100 100 0 8 0 nchpl 144 27180 0 25538 63 0 63 63 0 8 0 rtmask 32 9 0 9 3 3 0 1 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 103318 0 103318 3 2 1 2 0 8 1 percpumem 16 409 0 367 1 0 1 1 0 8 0 vcpupl 2048 240 0 0 30 0 30 30 0 8 0 vmpool 568 249 0 9 19 1 18 18 0 8 0 kstatmem 264 500 0 470 3 0 3 3 0 8 0 scsiplug 72 15 0 15 4 4 0 1 0 8 0 scxspl 216 73765 0 73765 32 31 1 8 0 8 1 plimitpl 152 1091 0 1073 1 0 1 1 0 8 0 sigapl 424 10272 0 10202 10 2 8 8 0 8 0 futexpl 64 83462 0 83459 2 1 1 1 0 8 0 knotepl 120 838 0 0 12 0 12 12 0 8 0 kqueuepl 216 1591 0 1583 22 21 1 5 0 8 0 pipepl 320 1974 0 1945 37 34 3 8 0 8 0 fdescpl 496 10230 0 10201 8 3 5 5 0 8 1 filepl 152 71594 0 71334 126 108 18 23 0 8 8 lockfpl 104 2404 0 2402 5 4 1 2 0 8 0 lockfspl 48 736 0 734 1 0 1 1 0 8 0 sessionpl 144 87 0 69 1 0 1 1 0 8 0 pgrppl 48 114 0 96 1 0 1 1 0 8 0 ucredpl 104 7734 0 7721 1 0 1 1 0 8 0 zombiepl 144 10205 0 10202 2 1 1 1 0 8 0 processpl 1072 10272 0 10202 5 0 5 5 0 8 0 procpl 672 28393 0 28300 19 10 9 10 0 8 0 srpgc 96 100 0 100 17 17 0 1 0 8 0 sosppl 168 42 0 42 10 9 1 1 0 8 1 sockpl 488 22452 0 22425 408 396 12 29 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 14 0 0 1 0 1 1 0 8 0 mcl8k 8192 33 0 0 3 0 3 3 0 8 0 mcl4k 4096 33 0 0 3 0 3 3 0 8 0 mcl2k2 2112 12 0 0 1 0 1 1 0 8 0 mcl2k 2048 447 0 0 51 14 37 51 0 8 0 mtagpl 96 538 0 0 11 0 11 11 0 8 0 mbufpl 256 1643 0 0 80 0 80 80 0 8 0 bufpl 288 18728 0 12396 453 0 453 453 0 8 0 anonpl 24 1978691 0 1960421 194 77 117 132 0 186 1 amapchunkpl 152 195257 0 194418 56 20 36 42 0 158 0 amappl16 200 16162 0 15621 85 53 32 42 0 8 0 amappl15 192 7 0 7 3 3 0 1 0 8 0 amappl14 184 348 0 332 2 0 2 2 0 8 0 amappl13 176 4 0 3 1 0 1 1 0 8 0 amappl12 168 1170 0 1163 1 0 1 1 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 134 0 121 1 0 1 1 0 8 0 amappl9 144 995 0 995 5 5 0 1 0 8 0 amappl8 136 640 0 531 4 0 4 4 0 8 0 amappl7 128 312 0 283 2 1 1 2 0 8 0 amappl6 120 503 0 483 2 1 1 2 0 8 0 amappl5 112 533 0 523 1 0 1 1 0 8 0 amappl4 104 1252 0 1222 2 1 1 2 0 8 0 amappl3 96 29641 0 29583 2 0 2 2 0 8 0 amappl2 88 11311 0 11224 4 1 3 3 0 8 1 amappl1 80 233599 0 232797 24 5 19 23 0 8 0 amappl 88 68949 0 68664 9 2 7 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 10479 0 10210 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 10479 0 10210 2 0 2 2 0 8 0 vmmpekpl 168 79342 0 79234 6 0 6 6 0 8 0 vmmpepl 168 958457 0 954933 393 219 174 186 0 357 7 vmsppl 368 10478 0 10210 27 2 25 25 0 8 0 rwobjpl 56 250768 0 242790 124 10 114 116 0 8 0 pdppl 4096 20965 0 20660 931 620 311 311 0 8 6 pvpl 32 3902961 0 3879017 371 163 208 274 0 265 4 pmappl 248 10478 0 10210 18 1 17 17 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2001 0 818 34 0 34 34 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff829bcff0) 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 __mp_lock(ffffffff82b51038) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b51038) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f sys/dev/kcov.c:148 __mp_lock(ffffffff82b51038) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b51038) at __mp_lock+0x133 sys/kern/kern_lock.c:147 syscall(ffff80002901a2c0) at syscall+0x5bd mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80002901a2c0) at syscall+0x5bd sys/arch/amd64/amd64/trap.c:620 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaf4cc9bfe00, count: 5 ddb{0}> trace x86_ipi_db(ffffffff829bcff0) 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 __mp_lock(ffffffff82b51038) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b51038) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f sys/dev/kcov.c:148 __mp_lock(ffffffff82b51038) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b51038) at __mp_lock+0x133 sys/kern/kern_lock.c:147 syscall(ffff80002901a2c0) at syscall+0x5bd mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80002901a2c0) at syscall+0x5bd sys/arch/amd64/amd64/trap.c:620 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaf4cc9bfe00, count: -10 ddb{0}> machine ddbcpu 1 Stopped at memset+0x45: repe stosb %es:(%rdi) memset() at memset+0x45 ffs_write(ffff8000235aca20) at ffs_write+0x93c VOP_WRITE(fffffd807d9ce510,ffff8000235acad8,3,fffffd807f7d76e8) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002e490d30,fffffd807d9ce510,fffffd807f7d76e8,ffff8000235acbb8,ffff8000235acb80) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:660 ktrsysret(ffff80002e490d30,5b,0,ffff8000235accb0) at ktrsysret+0x18c ktrwrite2 sys/kern/kern_ktrace.c:625 [inline] ktrsysret(ffff80002e490d30,5b,0,ffff8000235accb0) at ktrsysret+0x18c sys/kern/kern_ktrace.c:207 syscall(ffff8000235acd30) at syscall+0x5d0 mi_syscall_return sys/sys/syscall_mi.h:131 [inline] syscall(ffff8000235acd30) at syscall+0x5d0 sys/arch/amd64/amd64/trap.c:620 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdeb80, count: 8 ddb{1}> trace memset() at memset+0x45 ffs_write(ffff8000235aca20) at ffs_write+0x93c VOP_WRITE(fffffd807d9ce510,ffff8000235acad8,3,fffffd807f7d76e8) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002e490d30,fffffd807d9ce510,fffffd807f7d76e8,ffff8000235acbb8,ffff8000235acb80) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:660 ktrsysret(ffff80002e490d30,5b,0,ffff8000235accb0) at ktrsysret+0x18c ktrwrite2 sys/kern/kern_ktrace.c:625 [inline] ktrsysret(ffff80002e490d30,5b,0,ffff8000235accb0) at ktrsysret+0x18c sys/kern/kern_ktrace.c:207 syscall(ffff8000235acd30) at syscall+0x5d0 mi_syscall_return sys/sys/syscall_mi.h:131 [inline] syscall(ffff8000235acd30) at syscall+0x5d0 sys/arch/amd64/amd64/trap.c:620 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdeb80, count: -7