login: uvm_fault(0xfffffd806c2095d0, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND 335410 46981 74 0x1100012 0 1 pflogd dt_ioctl_record_stop(ffff800001481000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff8000fffe62b8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000fffe62b8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000367ea900) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c1c71b8,81,fffffd80097fb548,ffff8000fffe62b8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c02b680,ffff8000fffe62b8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c02b680,ffff8000fffe62b8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c02b680,ffff8000fffe62b8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c02b680,ffff8000fffe62b8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe62b8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe62b8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe62b8,ffff8000367eac70,ffff8000367eabc0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000367eac70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000367eac70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73b01c1fd020, count: 3 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffffd806c2095d0, 0x0, 0, 1) -> e ddb{0}> trace dt_ioctl_record_stop(ffff800001481000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff8000fffe62b8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000fffe62b8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000367ea900) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c1c71b8,81,fffffd80097fb548,ffff8000fffe62b8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c02b680,ffff8000fffe62b8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c02b680,ffff8000fffe62b8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c02b680,ffff8000fffe62b8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c02b680,ffff8000fffe62b8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe62b8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe62b8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe62b8,ffff8000367eac70,ffff8000367eabc0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000367eac70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000367eac70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73b01c1fd020, count: -12 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000367ea830 rbx 0x1 rdx 0 rcx 0xffff8000fffe62b8 rax 0xffffffff837c0ff0 cpu_info_full_primary+0x1ff0 r8 0xffffffffffffffff r9 0 r10 0x9ec68265c1e4e394 r11 0x69a8b1b1fbba6a00 r12 0 r13 0 r14 0 r15 0xffff8000014be900 rip 0xffffffff82b6a8e8 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000367ea800 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb{0}> show proc PROC (syz-executor) tid=9674 pid=12606 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=63, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffe62b8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000fffef240,0xffff8000fffe7788 process=0xffff8000fffe9358 user=0xffff8000367e5000, vmspace=0xfffffd806c2095d0 estcpu=13, cpticks=4, pctcpu=0.1, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 77624 330095 13297 0 2 0 syz-executor 6258 425098 60934 0 2 0x2 sh 98039 271118 55756 0 2 0 syz-executor 98039 63990 55756 0 2 0x4000000 syz-executor 68415 372217 8717 0 3 0x80 nanoslp syz-executor 68415 217994 8717 0 3 0x4000080 ttyin syz-executor 68415 513529 8717 0 3 0x4000080 fsleep syz-executor 35632 439120 49435 0 3 0x80 nanoslp syz-executor 35632 521775 49435 0 3 0x4000080 kqread syz-executor 35632 322664 49435 0 3 0x4000080 fsleep syz-executor 35632 124122 49435 0 3 0x4000080 fsleep syz-executor 42945 199061 60766 0 3 0x80 nanoslp syz-executor 42945 159702 60766 0 3 0x4000080 ttyout syz-executor 42945 81892 60766 0 3 0x4000080 fsleep syz-executor 60934 210517 75852 0 3 0x82 wait syz-executor 13297 382618 75852 0 3 0x82 nanoslp syz-executor 49435 331989 75852 0 3 0x82 nanoslp syz-executor 11213 392608 75852 0 2 0x2 syz-executor 55756 287686 75852 0 3 0x82 nanoslp syz-executor 29367 40782 75852 0 3 0x82 nanoslp syz-executor 60766 506509 75852 0 2 0x2 syz-executor 8717 276660 75852 0 3 0x82 nanoslp syz-executor 75852 103603 7537 0 3 0x82 kqread syz-executor 7537 174316 94071 0 3 0x10008a sigsusp ksh 94071 247180 73549 0 3 0x98 kqread sshd-session 73549 358488 32868 0 3 0x92 kqread sshd-session 29270 274234 1 0 3 0x100083 ttyin getty 32868 10664 1 0 3 0x88 kqread sshd 46981 335410 71254 74 7 0x1100012 pflogd 71254 341545 1 0 3 0x80 sbwait pflogd 30733 194053 35241 73 2 0x1100090 syslogd 35241 77421 1 0 3 0x100082 sbwait syslogd 71745 80709 1 0 3 0x100080 kqread resolvd 82309 48783 88942 77 3 0x100092 kqread dhcpleased 35269 381472 88942 77 3 0x100092 kqread dhcpleased 88942 94857 1 0 3 0x80 kqread dhcpleased 62108 61412 0 0 3 0x14200 bored smr 10337 401641 0 0 2 0x14200 zerothread 79788 254397 0 0 3 0x14200 aiodoned aiodoned 62580 15005 0 0 3 0x14200 syncer update 56140 432473 0 0 3 0x14200 cleaner cleaner 89282 322273 0 0 3 0x14200 reaper reaper 58041 424529 0 0 3 0x14200 pgdaemon pagedaemon 12674 40562 0 0 3 0x14200 bored viomb 125 101538 0 0 3 0x40014200 acpi0 acpi0 57828 277805 0 0 3 0x40014200 idle1 21372 347218 0 0 3 0x14200 bored softnet1 22482 445307 0 0 3 0x14200 bored softnet0 51344 32941 0 0 3 0x14200 smrbar systqmp 8365 385284 0 0 3 0x14200 bored systq 95659 408726 0 0 3 0x14200 tmoslp softclockmp 37241 347163 0 0 3 0x40014200 tmoslp softclock 50296 435332 0 0 3 0x40014200 idle0 1 128924 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 98039 (syz-executor) thread 0xffff8000fffe74e0 (63990) exclusive rrwlock inode r = 0 (0xfffffd806ea47120) #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 Process 11213 (syz-executor) thread 0xffff8000fffef4d8 (392608) exclusive rrwlock inode r = 0 (0xfffffd806c565eb8) #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 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c8c4c60) #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 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 51344 (systqmp) thread 0xffff8000ffffe000 (32941) shared rwlock systqmp r = 0 (0xffffffff83848d68) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10216 11169K 11169K 166960K 11317 0 pcb 20 12K 12K 166960K 26 0 rtable 238 7K 7K 166960K 348 0 pf 34 17K 18K 166960K 47 0 ifaddr 44 7K 7K 166960K 47 0 ifgroup 55 2K 2K 166960K 57 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 37K 166960K 74 0 ioctlops 0 0K 4K 166960K 1490 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1347 85K 85K 166960K 1373 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 85K 166960K 141 0 proc 74 131K 147K 166960K 532 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1 0 in_multi 103 7K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 49 228K 228K 166960K 49 0 exec 0 0K 1K 166960K 373 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 236 159K 168K 166960K 3232 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 42 84K 100K 166960K 1265 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 28 2K 2K 166960K 29 0 temp 34 8642K 8706K 166960K 4072 0 kqueue 16 26K 28K 166960K 26 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 32 0 29 1 0 1 1 0 8 0 rtentry 176 110 0 1 5 0 5 5 0 8 0 unpcb 144 40 0 22 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 9 0 4 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 74 0 63 2 0 2 2 0 8 0 nd6 152 23 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 3 0 3 1 0 1 1 0 8 1 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 16 0 0 1 0 1 1 0 8 0 pfstkey 128 16 0 0 1 0 1 1 0 8 0 pfstate 384 16 0 0 2 0 2 2 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 40 453 0 0 5 0 5 5 0 8 0 art_node 32 110 0 10 1 0 1 1 0 8 0 semapl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1578 0 61 95 0 95 95 0 8 0 ffsino 296 1578 0 61 117 0 117 117 0 8 0 nchpl 144 1776 0 72 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 1672 0 0 93 0 93 93 0 8 0 namei 1024 5350 0 5349 2 0 2 2 0 8 1 percpumem 16 52 0 3 1 0 1 1 0 8 0 kstatmem 264 28 0 2 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 5826 0 5826 3 1 2 2 1 8 2 plimitpl 152 31 0 12 1 0 1 1 0 8 0 sigapl 424 450 0 403 6 0 6 6 0 8 0 knotepl 120 304 0 0 10 0 10 10 0 8 0 kqueuepl 224 27 0 12 2 0 2 2 0 8 0 pipepl 344 118 0 91 3 0 3 3 0 8 0 fdescpl 528 434 0 403 3 0 3 3 0 8 0 filepl 160 1548 0 1314 11 0 11 11 0 8 0 lockfpl 104 7 0 4 1 0 1 1 0 8 0 lockfspl 48 5 0 2 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 13 1 0 1 1 0 8 0 ucredpl 104 87 0 74 1 0 1 1 0 8 0 zombiepl 144 404 0 403 1 0 1 1 0 8 0 processpl 1232 450 0 403 5 0 5 5 0 8 0 procpl 664 471 0 416 6 0 6 6 0 8 0 sockpl 752 146 0 114 4 0 4 4 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 127 0 0 8 0 8 8 0 8 0 bufpl 280 2338 0 127 158 0 158 158 0 8 0 anonpl 32 3936 0 0 32 0 32 32 0 246 0 amapchunkpl 152 8819 0 8353 21 0 21 21 0 158 0 amappl16 200 2019 0 1998 5 0 5 5 0 8 3 amappl15 192 8 0 8 1 0 1 1 0 8 1 amappl14 184 6 0 6 1 0 1 1 0 8 1 amappl13 176 431 0 429 1 0 1 1 0 8 0 amappl12 168 793 0 752 3 0 3 3 0 8 0 amappl11 160 8 0 8 1 0 1 1 0 8 1 amappl10 152 54 0 40 1 0 1 1 0 8 0 amappl9 144 254 0 253 1 0 1 1 0 8 0 amappl8 136 38 0 36 1 0 1 1 0 8 0 amappl7 128 93 0 92 1 0 1 1 0 8 0 amappl6 120 317 0 303 1 0 1 1 0 8 0 amappl5 112 94 0 84 1 0 1 1 0 8 0 amappl4 104 408 0 378 1 0 1 1 0 8 0 amappl3 96 1319 0 1230 3 0 3 3 0 8 0 amappl2 88 550 0 477 2 0 2 2 0 8 0 amappl1 80 9000 0 8415 14 0 14 14 0 8 0 amappl 88 2506 0 2348 4 0 4 4 0 92 0 uvmvnodes 80 1672 0 0 35 0 35 35 0 8 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 434 0 403 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 434 0 403 1 0 1 1 0 8 0 vmmpekpl 168 5362 0 5327 2 0 2 2 0 8 0 vmmpepl 168 36271 0 34414 87 0 87 87 0 357 2 vmsppl 488 433 0 403 5 0 5 5 0 8 0 rwobjpl 80 15105 0 12523 55 0 55 55 0 8 0 pdppl 4096 876 0 806 94 12 82 82 0 8 12 pvpl 32 9669 0 0 78 0 78 78 0 265 0 pmappl 256 433 0 403 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 259 0 14 7 0 7 7 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace dt_ioctl_record_stop(ffff800001481000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff8000fffe62b8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000fffe62b8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000367ea900) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c1c71b8,81,fffffd80097fb548,ffff8000fffe62b8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c02b680,ffff8000fffe62b8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c02b680,ffff8000fffe62b8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c02b680,ffff8000fffe62b8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c02b680,ffff8000fffe62b8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe62b8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe62b8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe62b8,ffff8000367eac70,ffff8000367eabc0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000367eac70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000367eac70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73b01c1fd020, count: -12 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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(ffffffff839b0d20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b0d20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 vn_read(fffffd806e42e650,ffff80002a2b08b8,0) at vn_read+0x56 sys/kern/vfs_vnops.c:351 dofilereadv(ffff8000ffffc538,4,ffff80002a2b08b8,0,ffff80002a2b0970) at dofilereadv+0x25a sys/kern/sys_generic.c:252 sys_read(ffff8000ffffc538,ffff80002a2b0a20,ffff80002a2b0970) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff80002a2b0a20) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2b0a20) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75c97dcd0e10, count: 6 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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(ffffffff839b0d20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b0d20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 vn_read(fffffd806e42e650,ffff80002a2b08b8,0) at vn_read+0x56 sys/kern/vfs_vnops.c:351 dofilereadv(ffff8000ffffc538,4,ffff80002a2b08b8,0,ffff80002a2b0970) at dofilereadv+0x25a sys/kern/sys_generic.c:252 sys_read(ffff8000ffffc538,ffff80002a2b0a20,ffff80002a2b0970) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff80002a2b0a20) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2b0a20) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75c97dcd0e10, count: -9