uvm_fault(0xfffffd8065874988, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82de4620 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff800037606830 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82de4620 Starting stack trace... panic(ffffffff8332cce0) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff800037606780) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001495000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff8000ffff0cf0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff0cf0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff800037606930) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8065703130,81,fffffd807f7d34e0,ffff8000ffff0cf0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b554b10,ffff8000ffff0cf0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b554b10,ffff8000ffff0cf0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806b554b10,ffff8000ffff0cf0) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd806b554b10,ffff8000ffff0cf0) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff8000ffff0cf0) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff8000ffff0cf0,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff8000ffff0cf0,ffff800037606ca0,ffff800037606bf0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800037606ca0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037606ca0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73931a88ad30, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 TID PID UID PRFLAGS PFLAGS CPU COMMAND *163193 58836 0 0x1000000 0 1 syz-executor 340975 89631 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x76b9328ec140, 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}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd8065874988, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x76b9328ec140, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000367f23c0 rbx 0 rdx 0 rcx 0xffff8000ffff0020 rax 0x2a r8 0xffff8000367f22f0 r9 0x1 r10 0x74eb26ffac0e7104 r11 0x8b4989046f6426c5 r12 0 r13 0xffffffff8129dee8 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff82fb44c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff8000367f2340 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=163193 pid=58836 tcnt=2 stat=onproc flags process=1000000 proc=0 runpri=50, usrpri=86, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c460f88,0xffff8000ffff1c60 process=0xffff80003c45d770 user=0xffff8000367ed000, vmspace=0xfffffd80658743e8 estcpu=36, cpticks=4, pctcpu=0.0, user=2, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 38729 393475 56412 0 2 0 syz-executor 38729 65739 56412 0 3 0x4000080 fsleep syz-executor *58836 163193 83813 0 7 0x1000000 syz-executor 58836 475588 83813 0 3 0x5000080 msgwait syz-executor 41193 23033 61056 0 3 0x80 nanoslp syz-executor 41193 225707 61056 0 3 0x4000080 ttyout syz-executor 41193 206608 61056 0 3 0x4000080 fsleep syz-executor 22691 442039 17666 0 2 0 syz-executor 22691 183263 17666 0 3 0x4000080 kqsel syz-executor 22691 211319 17666 0 3 0x4000080 kqsel syz-executor 27242 259440 65934 0 3 0x80 nanoslp syz-executor 27242 465217 65934 0 3 0x4000080 piperd syz-executor 27242 67265 65934 0 3 0x4000080 fsleep syz-executor 1951 146838 75931 0 3 0x82 nanoslp syz-executor 5622 40032 0 0 3 0x14200 acct acct 23301 121728 75931 0 3 0x2 biowait syz-executor 91086 46831 75931 0 3 0x82 nanoslp syz-executor 67105 289428 1 0 3 0x100083 ttyin getty 87006 9528 0 0 3 0x14280 nfsidl nfsio 85750 70292 0 0 3 0x14280 nfsidl nfsio 16695 345227 0 0 3 0x14280 nfsidl nfsio 59819 20589 0 0 3 0x14280 nfsidl nfsio 33224 132455 0 0 3 0x14280 nfsidl nfsio 95640 265138 0 0 3 0x14280 nfsidl nfsio 84244 194365 0 0 3 0x14280 nfsidl nfsio 95442 194325 0 0 3 0x14280 nfsidl nfsio 20220 85887 0 0 3 0x14280 nfsidl nfsio 77124 479034 0 0 3 0x14280 nfsidl nfsio 26524 339212 0 0 3 0x14280 nfsidl nfsio 44777 315017 0 0 3 0x14280 nfsidl nfsio 90838 153689 0 0 3 0x14280 nfsidl nfsio 39535 350054 0 0 3 0x14280 nfsidl nfsio 62236 316251 0 0 3 0x14280 nfsidl nfsio 16805 464440 0 0 3 0x14280 nfsidl nfsio 77042 54936 0 0 3 0x14280 nfsidl nfsio 40205 68972 0 0 3 0x14280 nfsidl nfsio 63795 347747 0 0 3 0x14280 nfsidl nfsio 15527 70590 0 0 3 0x14280 nfsidl nfsio 74343 270307 0 0 3 0x14200 bored sosplice 17666 453404 75931 0 2 0x2 syz-executor 65934 243628 75931 0 2 0x2 syz-executor 56412 42195 75931 0 3 0x82 nanoslp syz-executor 61056 132973 75931 0 3 0x82 nanoslp syz-executor 83813 283348 75931 0 3 0x82 nanoslp syz-executor 75931 468683 39866 0 3 0x82 kqread syz-executor 39866 77619 36715 0 3 0x10008a sigsusp ksh 36715 316671 24029 0 3 0x98 kqread sshd-session 24029 90380 49917 0 3 0x92 kqread sshd-session 49917 126917 1 0 3 0x88 kqread sshd 32545 192847 17009 74 3 0x1100092 bpf pflogd 17009 84555 1 0 3 0x80 sbwait pflogd 74615 450705 81699 73 3 0x1100090 kqread syslogd 81699 95226 1 0 3 0x100082 sbwait syslogd 181 191233 1 0 3 0x100080 kqread resolvd 77473 78554 2792 77 3 0x100092 kqread dhcpleased 16320 355545 2792 77 3 0x100092 kqread dhcpleased 2792 271498 1 0 3 0x80 kqread dhcpleased 24820 285129 0 0 3 0x14200 pause smr 61405 471655 0 0 2 0x14200 zerothread 25257 246603 0 0 3 0x14200 aiodoned aiodoned 47848 335894 0 0 3 0x14200 syncer update 52371 89371 0 0 3 0x14200 cleaner cleaner 89631 340975 0 0 7 0x14200 reaper 12233 505824 0 0 3 0x14200 pgdaemon pagedaemon 84992 253360 0 0 3 0x14200 bored viomb 66473 261189 0 0 3 0x40014200 acpi0 acpi0 42695 354734 0 0 3 0x40014200 idle1 94141 82767 0 0 3 0x14200 bored softnet3 2477 254846 0 0 3 0x14200 bored softnet2 37354 415763 0 0 3 0x14200 bored softnet1 372 236103 0 0 3 0x14200 bored softnet0 80366 10275 0 0 2 0x14200 systqmp 47107 176131 0 0 3 0x14200 bored systq 16525 425342 0 0 3 0x14200 tmoslp softclockmp 87604 269185 0 0 3 0x40014200 tmoslp softclock 67306 76870 0 0 3 0x40014200 idle0 1 64027 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff83a035f0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvm_pmr_freepageq+0x15c sys/uvm/uvm_pmemrange.c:1371 #4 km_free+0x36f sys/uvm/uvm_km.c:827 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:285 #6 reaper+0x1fe sys/kern/kern_exit.c:467 #7 proc_trampoline+0x10 Process 23301 (syz-executor) thread 0xffff80003c433748 (121728) exclusive rrwlock inode r = 0 (0xfffffd806dd25418) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806bb69400) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10219 11207K 11594K 166960K 12482 0 pcb 17 14K 16K 166960K 175 0 rtable 211 8K 9K 166960K 522 0 pf 36 18K 81K 166960K 118 0 ifaddr 40 7K 7K 166960K 87 0 ifgroup 55 2K 2K 166960K 118 0 sysctl 4 1K 2K 166960K 6 0 counters 64 36K 37K 166960K 138 0 ioctlops 0 0K 4K 166960K 1743 0 iov 0 0K 14K 166960K 30 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1468 92K 93K 166960K 2240 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 35 0 dirhash 15 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 98K 166960K 793 0 sigio 0 0K 0K 166960K 12 0 proc 74 103K 140K 166960K 694 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 93 0 in_multi 90 6K 7K 166960K 154 0 ether_multi 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 578 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 234 168K 182K 166960K 8702 0 UVM aobj 51 5K 5K 166960K 54 0 pinsyscall 42 84K 102K 166960K 2001 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 32 0 NDP 13 0K 2K 166960K 58 0 temp 59 8687K 8783K 166960K 20481 0 kqueue 14 22K 28K 166960K 109 0 SYN cache 2 8K 16K 166960K 3 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 70 0 67 1 0 1 1 0 8 0 rtentry 176 164 0 72 6 0 6 6 0 8 0 unpcb 144 402 0 385 2 0 2 2 0 8 1 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 808 209 0 202 7 3 4 7 0 8 3 arp 128 27 0 12 1 0 1 1 0 8 0 inpcb 384 637 0 625 8 3 5 8 0 8 3 nd6 144 36 0 13 1 0 1 1 0 8 0 pkpcb 40 11 0 11 2 1 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 30 0 30 1 0 1 1 0 8 1 pppxif 1504 5 0 5 1 1 0 1 0 8 0 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 4 0 1 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 pfanchor 1288 2 0 1 1 0 1 1 0 8 0 pfstitem 24 46 0 8 1 0 1 1 0 8 0 pfstkey 128 111 0 73 2 0 2 2 0 8 0 pfstate 384 111 0 73 5 0 5 5 0 8 0 pfrule 1344 30 0 22 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 642 0 244 29 2 27 29 0 8 2 art_table 32 643 0 244 4 0 4 4 0 8 0 art_node 16 161 0 79 1 0 1 1 0 8 0 sysvmsgpl 40 43 0 4 1 0 1 1 0 8 0 semapl 112 29 0 19 1 0 1 1 0 8 0 shmpl 112 51 0 3 2 0 2 2 0 8 0 dirhash 1024 25 0 6 3 0 3 3 0 8 0 dino2pl 256 2932 0 1422 95 0 95 95 0 8 0 ffsino 288 2932 0 1422 109 0 109 109 0 8 0 nchpl 144 4008 0 2310 64 0 64 64 0 8 0 rtmask 32 4 0 4 1 1 0 1 0 8 0 uvmvnodes 80 3488 0 0 72 0 72 72 0 8 0 vnodes 216 3488 0 0 194 0 194 194 0 8 0 namei 1024 14160 0 14160 3 1 2 2 0 8 2 percpumem 16 84 0 37 1 0 1 1 0 8 0 kstatmem 264 70 0 46 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 12236 0 12235 10 4 6 8 1 8 5 plimitpl 152 100 0 83 1 0 1 1 0 8 0 sigapl 424 1117 0 1046 9 0 9 9 0 8 0 futexpl 64 9557 0 9554 1 0 1 1 0 8 0 knotepl 120 514 0 0 16 0 16 16 0 8 0 kqueuepl 224 220 0 208 3 1 2 3 0 8 1 pipepl 336 223 0 129 8 0 8 8 0 8 0 fdescpl 520 1076 0 1045 3 0 3 3 0 8 0 filepl 160 6401 0 6046 16 0 16 16 0 8 1 lockfpl 104 272 0 268 1 0 1 1 0 8 0 lockfspl 48 88 0 84 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 43 0 26 1 0 1 1 0 8 0 ucredpl 104 1363 0 1350 1 0 1 1 0 8 0 zombiepl 144 1048 0 1046 1 0 1 1 0 8 0 processpl 1192 1117 0 1046 6 0 6 6 0 8 0 procpl 656 2173 0 2094 8 0 8 8 0 8 0 srpgc 96 6 0 6 1 1 0 1 0 8 0 sockpl 728 1130 0 1098 9 3 6 9 0 8 2 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 119 0 0 3 0 3 3 0 8 0 mbufpl 256 306 0 0 20 0 20 20 0 8 0 bufpl 280 4794 0 127 334 0 334 334 0 8 0 anonpl 32 9663 0 0 78 0 78 78 0 246 0 amapchunkpl 152 27973 0 27502 28 1 27 27 0 158 5 amappl16 200 3719 0 3685 21 8 13 17 0 8 8 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 129 0 117 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 1789 0 1758 3 1 2 2 0 8 0 amappl11 160 77 0 63 1 0 1 1 0 8 0 amappl10 152 1 0 1 1 1 0 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 36 0 33 1 0 1 1 0 8 0 amappl7 128 118 0 105 1 0 1 1 0 8 0 amappl6 120 218 0 214 1 0 1 1 0 8 0 amappl5 112 139 0 130 1 0 1 1 0 8 0 amappl4 104 348 0 328 1 0 1 1 0 8 0 amappl3 96 5521 0 5412 4 0 4 4 0 8 0 amappl2 88 725 0 660 2 0 2 2 0 8 0 amappl1 80 11931 0 11327 16 1 15 15 0 8 0 amappl 88 7790 0 7630 5 0 5 5 0 92 0 dma4096 4096 3 0 3 2 2 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 7 0 7 2 2 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 53 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1076 0 1045 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1076 0 1045 1 0 1 1 0 8 0 vmmpekpl 168 10152 0 10085 4 0 4 4 0 8 0 vmmpepl 168 74332 0 72346 105 2 103 105 0 357 9 vmsppl 480 1075 0 1045 6 1 5 5 0 8 0 rwobjpl 72 25476 0 21008 82 0 82 82 0 8 0 pdppl 4096 2159 0 2090 105 34 71 83 0 8 2 pvpl 32 17189 0 0 140 1 139 139 0 265 0 pmappl 256 1075 0 1045 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 412 0 45 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83892ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c kd_curproc sys/dev/kcov.c:583 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c sys/dev/kcov.c:153 msleep(ffffffff83a08b28,ffffffff838a3cd0,4,ffffffff833d6aca,0) at msleep+0x85 sys/kern/kern_synch.c:213 reaper(ffff8000ffffd1f8) at reaper+0x14b sys/kern/kern_exit.c:451 end trace frame: 0x0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff83892ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c kd_curproc sys/dev/kcov.c:583 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c sys/dev/kcov.c:153 msleep(ffffffff83a08b28,ffffffff838a3cd0,4,ffffffff833d6aca,0) at msleep+0x85 sys/kern/kern_synch.c:213 reaper(ffff8000ffffd1f8) at reaper+0x14b sys/kern/kern_exit.c:451 end trace frame: 0x0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x76b9328ec140, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x76b9328ec140, count: -1