uvm_fault(0xfffffd806f631b78, 0x48, 0, 1) -> e kernel: page fault trap, code=0 Stopped at witness_checkorder+0xb5: movl 0x20(%r14),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND witness_checkorder(28,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x95 sys/kern/kern_lock.c:406 clockintr_unbind(ffff8000015e1b30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000169b000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(71e5f,81,2000,ffff8000397f0038) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(71e5f,81,2000,ffff8000397f0038) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000317d0dd0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8069cb49a0,81,fffffd80097fd680,ffff8000397f0038) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8060483d80,ffff8000397f0038) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8060483d80,ffff8000397f0038) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8060483d80,ffff8000397f0038) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8060483d80,ffff8000397f0038) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000397f0038) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000397f0038,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000397f0038,ffff8000317d1140,ffff8000317d1090) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000317d1140) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000317d1140) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 end trace frame: 0xffff8000317d11c0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffffd806f631b78, 0x48, 0, 1) -> e ddb{0}> trace witness_checkorder(28,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x95 sys/kern/kern_lock.c:406 clockintr_unbind(ffff8000015e1b30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000169b000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(71e5f,81,2000,ffff8000397f0038) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(71e5f,81,2000,ffff8000397f0038) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000317d0dd0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8069cb49a0,81,fffffd80097fd680,ffff8000397f0038) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8060483d80,ffff8000397f0038) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8060483d80,ffff8000397f0038) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8060483d80,ffff8000397f0038) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8060483d80,ffff8000397f0038) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000397f0038) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000397f0038,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000397f0038,ffff8000317d1140,ffff8000317d1090) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000317d1140) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000317d1140) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75a5f11c29f0, count: -15 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000317d0bf0 rbx 0 rdx 0 rcx 0xffff8000397f0038 rax 0xffffffff8389cffe cpu_info_full_primary+0x1ffe r8 0xffffffffffffffff r9 0 r10 0xa3f12a386e3bd07 r11 0xfa92e51c116fd051 r12 0xfe r13 0x9 r14 0x28 r15 0 rip 0xffffffff830d05c5 witness_checkorder+0xb5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000317d0b50 ss 0x10 witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{0}> show proc PROC (syz-executor) tid=143490 pid=202 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000397f0038 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000397f0a98,0xffff8000397f0810 process=0xffff80003c4bce98 user=0xffff8000317cc000, vmspace=0xfffffd806f631b78 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 12124 194325 20411 0 2 0 syz-executor 12124 384863 20411 0 2 0x4000000 syz-executor 31028 356723 74832 0 2 0 syz-executor 31028 403406 74832 0 3 0x4000080 fsleep syz-executor 17663 125151 35289 0 2 0 syz-executor 17663 330493 35289 0 3 0x4000080 fsleep syz-executor 19160 518799 40241 0 3 0x80 nanoslp syz-executor 19160 52223 40241 0 3 0x4000080 dtread syz-executor 93131 212320 0 0 3 0x14200 acct acct 32317 394961 71013 0 4 0x82000 syz-executor 32317 423962 71013 0 2 0x4082000 syz-executor 32317 457698 71013 0 3 0x4082000 inode syz-executor 32317 377831 71013 0 3 0x4082000 inode syz-executor 32317 192143 71013 0 3 0x4082000 inode syz-executor 32317 164059 71013 0 3 0x4082000 inode syz-executor 32317 321826 71013 0 3 0x4002000 suspend syz-executor 49658 442061 0 0 3 0x14280 nfsidl nfsio 11566 312857 0 0 3 0x14280 nfsidl nfsio 19593 479407 0 0 3 0x14280 nfsidl nfsio 34624 40361 0 0 3 0x14280 nfsidl nfsio 23479 456137 0 0 3 0x14280 nfsidl nfsio 35845 13525 0 0 3 0x14280 nfsidl nfsio 63514 476557 0 0 3 0x14280 nfsidl nfsio 2418 151198 0 0 3 0x14280 nfsidl nfsio 46816 404714 0 0 3 0x14280 nfsidl nfsio 96300 59190 0 0 3 0x14280 nfsidl nfsio 71862 227265 0 0 3 0x14280 nfsidl nfsio 82126 246252 0 0 3 0x14280 nfsidl nfsio 70006 333795 0 0 3 0x14280 nfsidl nfsio 94677 155789 0 0 3 0x14280 nfsidl nfsio 89544 93257 0 0 3 0x14280 nfsidl nfsio 70965 231584 0 0 3 0x14280 nfsidl nfsio 98445 432550 0 0 3 0x14280 nfsidl nfsio 19471 397044 0 0 3 0x14280 nfsidl nfsio 14250 208836 0 0 3 0x14280 nfsidl nfsio 65625 359127 0 0 3 0x14280 nfsidl nfsio 16243 204181 74333 0 3 0x82 nanoslp syz-executor 13669 288989 74333 0 3 0x82 nanoslp syz-executor 40241 409720 74333 0 3 0x82 nanoslp syz-executor 35289 427544 74333 0 3 0x82 nanoslp syz-executor 58909 291681 74333 0 3 0x82 nanoslp syz-executor 71013 158891 74333 0 3 0x82 wait syz-executor 20411 128645 74333 0 3 0x82 nanoslp syz-executor 74832 30261 74333 0 3 0x82 nanoslp syz-executor 74333 256083 89392 0 3 0x82 kqread syz-executor 89392 465430 90761 0 3 0x10008a sigsusp ksh 90761 398454 62339 0 3 0x98 kqread sshd-session 62339 164233 93152 0 3 0x92 kqread sshd-session 54351 181061 1 0 3 0x100083 ttyin getty 93152 163689 1 0 3 0x88 kqread sshd 36278 413978 48521 74 3 0x1100092 bpf pflogd 48521 199060 1 0 3 0x80 sbwait pflogd 54269 210671 99184 73 3 0x1100090 kqread syslogd 99184 150962 1 0 3 0x100082 sbwait syslogd 81837 185450 1 0 3 0x100080 kqread resolvd 46742 124448 4870 77 3 0x100092 kqread dhcpleased 4724 436165 4870 77 3 0x100092 kqread dhcpleased 4870 209464 1 0 3 0x80 kqread dhcpleased 10343 326892 0 0 3 0x14200 bored smr 50380 9014 0 0 2 0x14200 zerothread 92802 190873 0 0 3 0x14200 aiodoned aiodoned 72793 201004 0 0 3 0x14200 syncer update 47839 6105 0 0 3 0x14200 cleaner cleaner 70818 158094 0 0 3 0x14200 reaper reaper 35946 272999 0 0 3 0x14200 pgdaemon pagedaemon 64074 298333 0 0 3 0x14200 bored viomb 15566 367113 0 0 3 0x40014200 acpi0 acpi0 23243 61375 0 0 7 0x40014200 idle1 46455 208847 0 0 3 0x14200 bored softnet1 17458 412862 0 0 3 0x14200 bored softnet0 98263 268148 0 0 3 0x14200 bored systqmp 19379 253669 0 0 3 0x14200 bored systq 46553 268570 0 0 3 0x14200 tmoslp softclockmp 86189 191829 0 0 3 0x40014200 tmoslp softclock 94600 153548 0 0 3 0x40014200 idle0 1 169437 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 32317 (syz-executor) thread 0xffff8000397f3ca8 (423962) exclusive rrwlock inode r = 0 (0xfffffd806e88c418) #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+0xbd 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:775 #9 Xsyscall+0x128 Process 32317 (syz-executor) thread 0xffff8000397f1a28 (457698) exclusive rrwlock inode r = 0 (0xfffffd800bfec208) #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+0xbd 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 domknodat+0xb4 sys/kern/vfs_syscalls.c:1592 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11113 12356K 14072K 166960K 12968 0 pcb 17 12K 12K 166960K 92 0 rtable 212 12K 13K 166960K 452 0 pf 35 17K 19K 166960K 79 0 ifaddr 39 6K 8K 166960K 70 0 ifgroup 56 2K 2K 166960K 107 0 sysctl 3 1K 9K 166960K 7 0 counters 70 37K 38K 166960K 128 0 ioctlops 0 0K 4K 166960K 1522 0 iov 1 12K 24K 166960K 24 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1437 90K 91K 166960K 1723 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 15 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 467 0 sigio 0 0K 0K 166960K 12 0 proc 73 131K 164K 166960K 562 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 57 0 in_multi 84 6K 7K 166960K 124 0 ether_multi 1 0K 0K 166960K 10 0 mrt 0 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 501 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 257 167K 182K 166960K 6213 0 UVM aobj 12 4K 4K 166960K 12 0 pinsyscall 43 86K 102K 166960K 1626 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 27 0 NDP 12 0K 1K 166960K 45 0 temp 52 8673K 8744K 166960K 23005 0 kqueue 13 20K 28K 166960K 91 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 120 132 0 129 3 0 3 3 0 8 2 rtentry 176 127 0 42 6 0 6 6 0 8 0 unpcb 144 243 0 224 3 2 1 3 0 8 0 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 92 0 88 2 0 2 2 0 8 1 arp 136 20 0 5 1 0 1 1 0 8 0 inpcb 328 355 0 345 2 0 2 2 0 8 1 nd6 152 24 0 5 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 22 0 22 1 0 1 1 0 8 1 pppxif 1504 3 0 3 1 0 1 1 0 8 1 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 3 0 0 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 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 533 0 143 32 2 30 32 0 8 1 art_table 40 535 0 143 6 0 6 6 0 8 0 art_node 32 127 0 50 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 11 1 0 1 1 0 8 0 semapl 112 11 0 1 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2253 0 744 96 0 96 96 0 8 0 ffsino 296 2253 0 744 118 0 118 118 0 8 1 nchpl 144 2913 0 1207 64 0 64 64 0 8 0 rtmask 32 4 0 4 1 1 0 1 0 8 0 vnodes 216 2548 0 0 142 0 142 142 0 8 0 namei 1024 9176 0 9174 2 1 1 2 0 8 0 percpumem 16 79 0 29 1 0 1 1 0 8 0 vcpupl 3968 1 0 0 1 0 1 1 0 8 0 vmpool 848 1 0 0 1 0 1 1 0 8 0 kstatmem 264 60 0 34 3 0 3 3 0 8 1 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 16356 0 16356 10 2 8 8 1 8 8 plimitpl 152 148 0 129 1 0 1 1 0 8 0 sigapl 424 806 0 737 9 1 8 8 0 8 0 knotepl 120 310 0 0 10 0 10 10 0 8 0 kqueuepl 224 165 0 156 3 0 3 3 0 8 2 pipepl 344 177 0 150 6 0 6 6 0 8 3 fdescpl 528 769 0 737 3 0 3 3 0 8 0 filepl 160 3950 0 3713 15 0 15 15 0 8 4 lockfpl 104 146 0 141 1 0 1 1 0 8 0 lockfspl 48 62 0 57 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 36 0 19 1 0 1 1 0 8 0 ucredpl 104 433 0 420 1 0 1 1 0 8 0 zombiepl 144 740 0 737 1 0 1 1 0 8 0 processpl 1232 806 0 737 6 0 6 6 0 8 0 procpl 664 1379 0 1300 8 0 8 8 0 8 0 sosppl 176 3 0 3 2 1 1 1 0 8 1 sockpl 752 742 0 710 10 0 10 10 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 204 0 0 13 0 13 13 0 8 0 bufpl 280 6609 0 473 439 0 439 439 0 8 0 anonpl 32 9233 0 0 75 0 75 75 0 246 0 amapchunkpl 152 19860 0 19336 32 0 32 32 0 158 5 amappl16 200 3229 0 2983 21 8 13 18 0 8 0 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 14 0 14 2 2 0 1 0 8 0 amappl13 176 501 0 500 1 0 1 1 0 8 0 amappl12 168 1143 0 1098 4 1 3 3 0 8 0 amappl11 160 6 0 6 1 1 0 1 0 8 0 amappl10 152 48 0 34 1 0 1 1 0 8 0 amappl9 144 252 0 252 1 1 0 1 0 8 0 amappl8 136 50 0 48 1 0 1 1 0 8 0 amappl7 128 90 0 89 1 0 1 1 0 8 0 amappl6 120 281 0 268 1 0 1 1 0 8 0 amappl5 112 91 0 81 1 0 1 1 0 8 0 amappl4 104 430 0 402 1 0 1 1 0 8 0 amappl3 96 3269 0 3170 4 1 3 3 0 8 0 amappl2 88 892 0 815 2 0 2 2 0 8 0 amappl1 80 10750 0 10150 14 0 14 14 0 8 0 amappl 88 5395 0 5216 5 0 5 5 0 92 1 uvmvnodes 80 117 0 0 3 0 3 3 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 11 0 0 1 0 1 1 0 8 0 uaddrrnd 24 769 0 737 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 769 0 737 1 0 1 1 0 8 0 vmmpekpl 168 8093 0 8055 3 0 3 3 0 8 0 vmmpepl 168 56685 0 54482 102 0 102 102 0 357 5 vmsppl 488 768 0 737 5 1 4 5 0 8 0 rwobjpl 80 18643 0 17357 29 0 29 29 0 8 1 pdppl 4096 1547 0 1475 102 30 72 85 0 8 0 pvpl 32 20097 0 0 163 0 163 163 0 265 0 pmappl 256 769 0 737 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 281 0 36 7 0 7 7 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(28,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x95 sys/kern/kern_lock.c:406 clockintr_unbind(ffff8000015e1b30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000169b000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(71e5f,81,2000,ffff8000397f0038) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(71e5f,81,2000,ffff8000397f0038) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000317d0dd0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8069cb49a0,81,fffffd80097fd680,ffff8000397f0038) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8060483d80,ffff8000397f0038) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8060483d80,ffff8000397f0038) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8060483d80,ffff8000397f0038) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8060483d80,ffff8000397f0038) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000397f0038) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000397f0038,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000397f0038,ffff8000317d1140,ffff8000317d1090) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000317d1140) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000317d1140) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75a5f11c29f0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299ddff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299ddff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5