¹j¼õ¬|ÿ ž¨E1\…:uvm_fault(0xfffffd806e3dd1f8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff817b3d88 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff800034c07330 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff817b3d88 Starting stack trace... panic(ffffffff833a2ff9) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff800034c07280) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001471000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff800034c08fb0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff800034c08fb0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff800034c07430) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805b863e68,81,fffffd80097fb410,ffff800034c08fb0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8066f91068,ffff800034c08fb0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8066f91068,ffff800034c08fb0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8066f91068,ffff800034c08fb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8066f91068,ffff800034c08fb0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800034c08fb0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800034c08fb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800034c08fb0,ffff800034c077a0,ffff800034c076f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800034c077a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800034c077a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x782934cda740, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *491051 92899 0 0 0 1 syz-executor 173955 92899 0 0 0x4000000 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x76e7a4e035e0, count: 14 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}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd806e3dd1f8, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x76e7a4e035e0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800030801590 rbx 0 rdx 0 rcx 0xffff80002a3b8d38 rax 0x2a r8 0xffff8000308014c0 r9 0x1 r10 0xd98a13dc2d947cad r11 0x2c30f9437a875b71 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff82a594c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800030801510 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=491051 pid=92899 tcnt=5 stat=onproc flags process=0 proc=0 runpri=84, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800034c09a10,0xffff80003c452a98 process=0xffff80002a3b26b0 user=0xffff8000307fc000, vmspace=0xfffffd8063cb79b0 estcpu=34, cpticks=17, pctcpu=0.6, user=5, sys=11, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 95258 277086 1449 0 2 0x2 sh 54936 114990 77062 0 2 0 syz-executor 54936 438821 77062 0 3 0x4000080 fsleep syz-executor 54936 427511 77062 0 3 0x4000080 fsleep syz-executor 54936 200771 77062 0 3 0x4000080 fsleep syz-executor 13014 216427 7767 0 2 0 syz-executor 13014 220034 7767 0 2 0x4000000 syz-executor 21727 5592 90879 0 2 0 syz-executor 21727 340564 90879 0 3 0x4000080 fsleep syz-executor 21727 101982 90879 0 3 0x4000080 fsleep syz-executor 1449 10259 81993 0 3 0x82 wait syz-executor *92899 491051 27050 0 7 0 syz-executor 92899 173955 27050 0 7 0x4000000 syz-executor 92899 17686 27050 0 3 0x4000080 fsleep syz-executor 92899 333285 27050 0 3 0x4000080 fsleep syz-executor 92899 376335 27050 0 3 0x4000080 fsleep syz-executor 98825 479685 0 0 3 0x14200 acct acct 7767 379873 81993 0 3 0x82 nanoslp syz-executor 8889 331470 86446 0 3 0x82 sbwait sshd-session 84563 117765 0 0 3 0x14280 nfsidl nfsio 51500 439634 0 0 3 0x14280 nfsidl nfsio 30765 412891 0 0 3 0x14280 nfsidl nfsio 94631 430232 0 0 3 0x14280 nfsidl nfsio 25340 423632 0 0 3 0x14280 nfsidl nfsio 26634 462622 0 0 3 0x14280 nfsidl nfsio 7618 129471 0 0 3 0x14280 nfsidl nfsio 16354 384620 0 0 3 0x14280 nfsidl nfsio 6029 502560 0 0 3 0x14280 nfsidl nfsio 1232 109380 0 0 3 0x14280 nfsidl nfsio 22039 257807 0 0 3 0x14280 nfsidl nfsio 5945 206993 0 0 3 0x14280 nfsidl nfsio 62735 189085 0 0 3 0x14280 nfsidl nfsio 14353 192227 0 0 3 0x14280 nfsidl nfsio 68005 447871 0 0 3 0x14280 nfsidl nfsio 62330 20314 0 0 3 0x14280 nfsidl nfsio 99143 468366 0 0 3 0x14280 nfsidl nfsio 13793 521362 0 0 3 0x14280 nfsidl nfsio 59645 295826 0 0 3 0x14280 nfsidl nfsio 58779 465190 0 0 3 0x14280 nfsidl nfsio 95466 243078 1 0 3 0x100083 ttyopn getty 60193 486674 0 0 3 0x14200 bored sosplice 90879 217291 81993 0 3 0x82 nanoslp syz-executor 66796 1180 81993 0 3 0x82 nanoslp syz-executor 48755 238444 81993 0 3 0x82 nanoslp syz-executor 77062 433094 81993 0 3 0x82 nanoslp syz-executor 49499 519239 81993 0 2 0x2 syz-executor 27050 337747 81993 0 3 0x82 nanoslp syz-executor 81993 377372 77648 0 2 0x2 syz-executor 77648 248839 73060 0 3 0x10008a sigsusp ksh 73060 239026 86331 0 3 0x98 kqread sshd-session 86331 9266 86446 0 3 0x92 kqread sshd-session 86446 69415 1 0 3 0x88 kqread sshd 68834 196501 34182 74 3 0x1100092 bpf pflogd 34182 314480 1 0 3 0x80 sbwait pflogd 27680 342331 2460 73 3 0x1100090 kqread syslogd 2460 101485 1 0 3 0x100082 sbwait syslogd 98480 132163 1 0 3 0x100080 kqread resolvd 90679 38848 92381 77 3 0x100092 kqread dhcpleased 52059 345964 92381 77 3 0x100092 kqread dhcpleased 92381 436184 1 0 3 0x80 kqread dhcpleased 58695 148012 0 0 3 0x14200 bored smr 36114 379084 0 0 2 0x14200 zerothread 29215 55066 0 0 3 0x14200 aiodoned aiodoned 64078 195919 0 0 3 0x14200 syncer update 89205 190872 0 0 3 0x14200 cleaner cleaner 59841 66986 0 0 3 0x14200 reaper reaper 58524 356807 0 0 3 0x14200 pgdaemon pagedaemon 56061 317546 0 0 3 0x14200 bored viomb 65253 483300 0 0 3 0x40014200 acpi0 acpi0 45920 444366 0 0 3 0x40014200 idle1 5414 475676 0 0 3 0x14200 bored softnet7 87758 332126 0 0 3 0x14200 bored softnet6 90385 434828 0 0 3 0x14200 bored softnet5 45223 128117 0 0 3 0x14200 bored softnet4 24350 294214 0 0 3 0x14200 bored softnet3 98065 16775 0 0 3 0x14200 bored softnet2 7952 252218 0 0 3 0x14200 bored softnet1 27842 267808 0 0 3 0x14200 netlock softnet0 46834 250945 0 0 2 0x40014200 systqmp 29508 174349 0 0 3 0x14200 bored systq 80980 15732 0 0 3 0x14200 tmoslp softclockmp 84816 521835 0 0 3 0x40014200 tmoslp softclock 57484 213391 0 0 3 0x40014200 idle0 1 517563 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 92899 (syz-executor) thread 0xffff80003c452a88 (173955) exclusive rrwlock inode r = 0 (0xfffffd8076546930) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10318 11190K 11350K 166960K 12641 0 pcb 17 16K 18K 166960K 262 0 rtable 193 9K 10K 166960K 428 0 pf 39 18K 81K 166960K 181 0 ifaddr 40 7K 8K 166960K 110 0 ifgroup 60 2K 2K 166960K 203 0 sysctl 3 1K 9K 166960K 14 0 counters 70 37K 38K 166960K 232 0 ioctlops 0 0K 5K 166960K 1704 0 iov 0 0K 16K 166960K 55 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1457 92K 92K 166960K 2559 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 5K 9K 166960K 20 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 49 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 1165 0 sigio 0 0K 0K 166960K 21 0 proc 72 115K 180K 166960K 681 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 197 0 in_multi 81 5K 7K 166960K 164 0 ether_multi 1 0K 0K 166960K 12 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 491 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 251 160K 174K 166960K 12012 0 UVM aobj 12 2K 2K 166960K 13 0 pinsyscall 44 88K 104K 166960K 2296 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 68 0 NDP 13 0K 2K 166960K 76 0 temp 81 8652K 8725K 166960K 62590 0 kqueue 13 20K 34K 166960K 214 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 112 0 109 1 0 1 1 0 8 0 rtentry 176 136 0 61 5 0 5 5 0 8 0 unpcb 144 718 0 697 6 4 2 4 0 8 1 syncache 336 5 0 5 3 3 0 1 0 8 0 tcpcb 736 356 0 349 10 8 2 7 0 8 1 arp 128 16 0 4 1 0 1 1 0 8 0 inpcb 328 1351 0 1340 24 14 10 15 0 8 8 nd6 144 22 0 9 1 0 1 1 0 8 0 pkpcb 40 9 0 9 3 2 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 60 0 60 4 3 1 1 0 8 1 pppxif 1504 8 0 8 3 3 0 1 0 8 0 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pffrag 232 11 0 3 1 0 1 1 0 482 0 pffrnode 88 10 0 3 1 0 1 1 0 8 0 pffrent 40 16 0 7 1 0 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 pfrktable 1344 6 0 4 4 3 1 1 0 8 0 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 75 0 23 1 0 1 1 0 8 0 pfstkey 128 77 0 26 2 0 2 2 0 8 0 pfstate 384 75 0 24 6 0 6 6 0 8 0 pfrule 1344 25 0 19 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 585 0 234 30 5 25 28 0 8 0 art_table 40 587 0 234 5 0 5 5 0 8 0 art_node 32 134 0 68 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 10 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 45 0 35 1 0 1 1 0 8 0 shmpl 112 10 0 1 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 3643 0 2137 95 0 95 95 0 8 0 ffsino 296 3643 0 2137 117 0 117 117 0 8 0 nchpl 144 5249 0 3549 64 0 64 64 0 8 0 rtmask 32 13 0 13 4 3 1 1 0 8 1 uvmvnodes 80 4336 0 0 89 0 89 89 0 8 0 vnodes 216 4336 0 0 241 0 241 241 0 8 0 namei 1024 18384 0 18384 5 4 1 2 0 8 1 percpumem 16 131 0 81 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 120 0 90 4 2 2 3 0 8 0 scsiplug 72 4 0 4 2 2 0 1 0 8 0 scxspl 216 24067 0 24067 12 9 3 8 1 8 3 plimitpl 152 369 0 350 1 0 1 1 0 8 0 sigapl 424 1471 0 1395 9 0 9 9 0 8 0 knotepl 120 588 0 0 18 0 18 18 0 8 0 kqueuepl 224 416 0 406 5 3 2 3 0 8 1 pipepl 344 233 0 203 3 0 3 3 0 8 0 fdescpl 528 1426 0 1394 3 0 3 3 0 8 0 filepl 160 9256 0 8962 32 15 17 17 0 8 4 lockfpl 104 736 0 734 2 1 1 2 0 8 0 lockfspl 48 278 0 276 1 0 1 1 0 8 0 sessionpl 144 26 0 16 1 0 1 1 0 8 0 pgrppl 48 52 0 34 1 0 1 1 0 8 0 ucredpl 104 1898 0 1882 1 0 1 1 0 8 0 zombiepl 144 1690 0 1688 1 0 1 1 0 8 0 processpl 1232 1471 0 1395 7 0 7 7 0 8 0 procpl 664 3204 0 3118 9 0 9 9 0 8 1 sosppl 168 10 0 10 4 3 1 1 0 8 1 sockpl 752 2231 0 2196 32 19 13 20 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 15 0 15 15 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 246 0 0 16 0 16 16 0 8 0 bufpl 280 9171 0 3028 440 0 440 440 0 8 0 anonpl 32 12754 0 0 103 0 103 103 0 246 0 amapchunkpl 152 40467 0 39930 40 14 26 30 0 158 3 amappl16 200 4583 0 4442 63 51 12 31 0 8 4 amappl15 192 21 0 21 1 1 0 1 0 8 0 amappl14 184 121 0 108 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 2104 0 2072 4 2 2 3 0 8 0 amappl11 160 52 0 37 1 0 1 1 0 8 0 amappl10 152 10 0 10 1 1 0 1 0 8 0 amappl9 144 243 0 243 1 1 0 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 113 0 99 1 0 1 1 0 8 0 amappl6 120 197 0 192 1 0 1 1 0 8 0 amappl5 112 141 0 131 1 0 1 1 0 8 0 amappl4 104 319 0 298 1 0 1 1 0 8 0 amappl3 96 8051 0 7939 5 1 4 4 0 8 0 amappl2 88 681 0 612 2 0 2 2 0 8 0 amappl1 80 12692 0 11999 17 2 15 15 0 8 0 amappl 88 11115 0 10942 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 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 128 255 0 255 2 2 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 12 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1426 0 1394 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1426 0 1394 1 0 1 1 0 8 0 vmmpekpl 168 12957 0 12903 3 0 3 3 0 8 0 vmmpepl 168 93962 0 91726 131 22 109 122 0 357 8 vmsppl 488 1425 0 1394 6 1 5 5 0 8 0 rwobjpl 80 30402 0 24889 116 3 113 113 0 8 0 pdppl 4096 2860 0 2788 116 40 76 86 0 8 4 pvpl 32 22376 0 0 181 1 180 180 0 265 0 pmappl 256 1425 0 1394 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 308 0 62 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8378aff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff83990898) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83990898) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff83990898) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83990898) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff83990898,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 biowait(fffffd800ca01370) at biowait+0xc6 sys/kern/vfs_bio.c:1242 bwrite(fffffd800ca01370) at bwrite+0x2e7 sys/kern/vfs_bio.c:754 ffs2_balloc(fffffd8076546890,9a8000,4000,fffffd80097fb410,2,ffff80003c4f6fb8) at ffs2_balloc+0x18b4 sys/ufs/ffs/ffs_balloc.c:701 end trace frame: 0xffff80003c4f7030, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8378aff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff83990898) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83990898) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff83990898) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83990898) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff83990898,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 biowait(fffffd800ca01370) at biowait+0xc6 sys/kern/vfs_bio.c:1242 bwrite(fffffd800ca01370) at bwrite+0x2e7 sys/kern/vfs_bio.c:754 ffs2_balloc(fffffd8076546890,9a8000,4000,fffffd80097fb410,2,ffff80003c4f6fb8) at ffs2_balloc+0x18b4 sys/ufs/ffs/ffs_balloc.c:701 ffs_write(ffff80003c4f7040) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd807cfc8488,ffff80003c4f71f8,7,fffffd80097fb410) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_write(fffffd8066ef4cf8,ffff80003c4f71f8,0) at vn_write+0x1d3 sys/kern/vfs_vnops.c:408 dofilewritev(ffff80003c452a88,4,ffff80003c4f71f8,0,ffff80003c4f72b0) at dofilewritev+0x242 sys/kern/sys_generic.c:380 sys_write(ffff80003c452a88,ffff80003c4f7360,ffff80003c4f72b0) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff80003c4f7360) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4f7360) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa80556dd530, count: -21 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x76e7a4e035e0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x76e7a4e035e0, count: -1