uvm_fault(0xffffffff8355a950, 0xffff8000145731a6, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x49: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND *221189 24516 0 0x2 0x1 1K syz-executor 90394 60433 0 0x14000 0x200 0 reaper memset() at memset+0x49 ffs_write(ffff80002a0b89d0) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd80620ba548,ffff80002a0b8a88,3,fffffd807f7d37b8) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a16b710,fffffd80620ba548,fffffd807f7d37b8,ffff80002a0b8b58,ffff80002a0b8b30) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:682 ktrstruct(ffff80002a16b710,ffffffff82fff9a0,ffff80002a0b8c50,10) at ktrstruct+0x19a sys/kern/kern_ktrace.c:308 sys_nanosleep(ffff80002a16b710,ffff80002a0b8d90,ffff80002a0b8ce0) at sys_nanosleep+0x109 sys/kern/kern_time.c:292 syscall(ffff80002a0b8d90) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0b8d90) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cd8a68cae80, count: 7 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(0xffffffff8355a950, 0xffff8000145731a6, 0, 2) -> d ddb{1}> trace memset() at memset+0x49 ffs_write(ffff80002a0b89d0) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd80620ba548,ffff80002a0b8a88,3,fffffd807f7d37b8) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a16b710,fffffd80620ba548,fffffd807f7d37b8,ffff80002a0b8b58,ffff80002a0b8b30) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:682 ktrstruct(ffff80002a16b710,ffffffff82fff9a0,ffff80002a0b8c50,10) at ktrstruct+0x19a sys/kern/kern_ktrace.c:308 sys_nanosleep(ffff80002a16b710,ffff80002a0b8d90,ffff80002a0b8ce0) at sys_nanosleep+0x109 sys/kern/kern_time.c:292 syscall(ffff80002a0b8d90) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0b8d90) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cd8a68cae80, count: -8 ddb{1}> show registers rdi 0xffff8000145731a6 rsi 0 rbp 0xffff80002a0b88f0 rbx 0x11a6 __ALIGN_SIZE+0x1a6 rdx 0x2 rcx 0x2 rax 0 r8 0x658 r9 0xffff80002a0b8850 r10 0x6e9b767c94012203 r11 0xffff8000145731a6 r12 0x1800 __ALIGN_SIZE+0x800 r13 0x11a6 __ALIGN_SIZE+0x1a6 r14 0xfffffd80620ba548 r15 0x1 rip 0xffffffff818ff4a9 memset+0x49 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a0b86e8 ss 0x10 memset+0x49: repe stosb %es:(%rdi) ddb{1}> show proc PROC (syz-executor) tid=221189 pid=24516 tcnt=1 stat=onproc flags process=2 proc=1 runpri=36, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff2cc8,0xffff80002a16a2e0 process=0xffff800036881fc0 user=0xffff80002a0b3000, vmspace=0xfffffd806b3c8008 estcpu=36, cpticks=4, pctcpu=0.0, user=0, sys=4, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 72437 267956 61574 0 3 0x10008a sigsusp sh 6266 137554 54566 0 2 0 syz-executor 6266 3589 54566 0 3 0x4000080 fsleep syz-executor 49942 269815 24516 0 2 0 syz-executor 49942 424860 24516 0 3 0x4000080 fsleep syz-executor 9727 282484 63105 0 2 0 syz-executor 9727 143417 63105 0 3 0x4000080 fsleep syz-executor 43088 26153 39067 0 2 0x10 syz-executor 43088 99787 39067 0 3 0x4000090 fsleep syz-executor 95165 511795 78386 0 2 0 syz-executor 95165 183201 78386 0 3 0x4000080 fsleep syz-executor 37119 455293 12216 -1 3 0x90 nanoslp syz-executor 37119 232181 12216 -1 3 0x4000090 fsleep syz-executor 37119 247797 12216 -1 3 0x4000090 fsleep syz-executor 3080 3353 75046 0 3 0x82 wait syz-executor 61574 132176 75046 0 3 0x82 wait syz-executor 54566 415830 75046 0 2 0x2 syz-executor *24516 221189 75046 0 7 0x3 syz-executor 63105 415971 75046 0 3 0x82 nanoslp syz-executor 39067 327790 75046 0 3 0x82 nanoslp syz-executor 78386 212958 75046 0 3 0x82 nanoslp syz-executor 12216 230101 75046 0 3 0x82 nanoslp syz-executor 57500 352572 1 0 3 0x100083 ttyopn getty 77912 312949 0 0 3 0x14280 nfsidl nfsio 89172 115603 0 0 3 0x14280 nfsidl nfsio 74800 162835 0 0 3 0x14280 nfsidl nfsio 32610 163354 0 0 3 0x14280 nfsidl nfsio 59999 193968 0 0 3 0x14280 nfsidl nfsio 44740 515897 0 0 3 0x14280 nfsidl nfsio 83509 50880 0 0 3 0x14280 nfsidl nfsio 46722 261511 0 0 3 0x14280 nfsidl nfsio 90984 97170 0 0 3 0x14280 nfsidl nfsio 69248 515617 0 0 3 0x14280 nfsidl nfsio 61283 188505 0 0 3 0x14280 nfsidl nfsio 69782 81515 0 0 3 0x14280 nfsidl nfsio 30421 177722 0 0 3 0x14280 nfsidl nfsio 6298 30621 0 0 3 0x14280 nfsidl nfsio 56230 70929 0 0 3 0x14280 nfsidl nfsio 47945 314325 0 0 3 0x14280 nfsidl nfsio 20402 469025 0 0 3 0x14280 nfsidl nfsio 23043 59000 0 0 3 0x14280 nfsidl nfsio 51799 419865 0 0 3 0x14280 nfsidl nfsio 35163 24101 0 0 3 0x14280 nfsidl nfsio 66844 401601 0 0 3 0x14200 bored sosplice 75046 298388 51209 0 3 0x82 kqread syz-executor 51209 322164 81351 0 3 0x10008a sigsusp ksh 81351 510147 16417 0 3 0x98 kqread sshd-session 16417 252070 79148 0 3 0x92 kqread sshd-session 79148 259230 1 0 3 0x88 kqread sshd 235 101526 50107 74 3 0x1100092 bpf pflogd 50107 133909 1 0 3 0x80 sbwait pflogd 83947 263355 86560 73 3 0x1100090 kqread syslogd 86560 30512 1 0 3 0x100082 sbwait syslogd 4788 11887 1 0 3 0x100080 kqread resolvd 9249 323680 95114 77 3 0x100092 kqread dhcpleased 66604 106194 95114 77 3 0x100092 kqread dhcpleased 95114 169963 1 0 3 0x80 kqread dhcpleased 54700 26074 0 0 3 0x14200 bored smr 39557 417133 0 0 2 0x14200 zerothread 37718 235699 0 0 3 0x14200 aiodoned aiodoned 33105 493070 0 0 3 0x14200 syncer update 24749 375684 0 0 3 0x14200 cleaner cleaner 60433 90394 0 0 7 0x14200 reaper 86453 30413 0 0 3 0x14200 pgdaemon pagedaemon 5762 383118 0 0 3 0x14200 bored viomb 89855 68196 0 0 3 0x40014200 acpi0 acpi0 98987 283221 0 0 3 0x40014200 idle1 96500 325209 0 0 3 0x14200 bored softnet3 8233 373641 0 0 3 0x14200 bored softnet2 70168 62565 0 0 3 0x14200 bored softnet1 9650 126499 0 0 3 0x14200 bored softnet0 70455 122355 0 0 3 0x14200 bored systqmp 94238 164009 0 0 3 0x14200 bored systq 19945 378299 0 0 3 0x14200 tmoslp softclockmp 74139 54844 0 0 3 0x40014200 tmoslp softclock 69444 268968 0 0 3 0x40014200 idle0 1 251605 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff835131b0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvm_pmr_freepages+0x165 sys/uvm/uvm_pmemrange.c:1312 #4 pmap_do_remove+0x873 sys/arch/amd64/amd64/pmap.c:1934 #5 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1865 #6 uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498 #7 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422 #8 reaper+0x246 sys/kern/kern_exit.c:480 #9 proc_trampoline+0x10 Process 24516 (syz-executor) thread 0xffff80002a16b710 (221189) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83513ac8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 __mp_acquire_count+0x58 #2 mi_switch+0x658 sys/kern/sched_bsd.c:460 #3 sleep_finish+0x219 sys/kern/kern_synch.c:416 #4 rw_enter+0x348 sys/kern/kern_rwlock.c:285 #5 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 #6 uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 #7 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #8 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 #9 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 #10 alltraps_kern_meltdown+0x7b #11 kcopy+0x41 #12 ffs_write+0x787 sys/ufs/ffs/ffs_vnops.c:359 #13 VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 #14 ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:682 #15 ktrstruct+0x19a sys/kern/kern_ktrace.c:308 #16 sys_nanosleep+0x109 sys/kern/kern_time.c:292 #17 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #17 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #18 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b3bb3d0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:676 #6 ktrwriteraw+0x172 sys/kern/kern_ktrace.c:679 #7 ktrstruct+0x19a sys/kern/kern_ktrace.c:308 #8 sys_nanosleep+0x109 sys/kern/kern_time.c:292 #9 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #9 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 Process 60433 (reaper) thread 0xffff800029fd87a0 (90394) exclusive rwlock vmmaplk r = 0 (0xfffffd80093020f0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvm_map_teardown+0x5e sys/uvm/uvm_map.c:2466 #4 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422 #5 reaper+0x246 sys/kern/kern_exit.c:480 #6 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10211 10228K 10432K 166960K 12332 0 pcb 17 13K 13K 166960K 152 0 rtable 192 6K 7K 166960K 1686 0 pf 35 17K 25K 166960K 191 0 ifaddr 39 7K 8K 166960K 229 0 ifgroup 55 2K 2K 166960K 266 0 sysctl 3 0K 0K 166960K 3 0 counters 64 36K 36K 166960K 174 0 ioctlops 0 0K 4K 166960K 1638 0 iov 0 0K 28K 166960K 63 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1403 88K 88K 166960K 2509 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 69 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 17 61K 89K 166960K 1524 0 sigio 0 0K 0K 166960K 15 0 proc 72 91K 140K 166960K 1787 0 subproc 104 6K 6K 166960K 637 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 104 0 in_multi 87 6K 7K 166960K 571 0 ether_multi 1 0K 0K 166960K 8 0 mrt 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 1083 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 238 73K 91K 166960K 13450 0 UVM aobj 16 2K 2K 166960K 17 0 pinsyscall 42 84K 101K 166960K 3655 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 40 0 NDP 24 1K 2K 166960K 166 0 temp 77 6824K 6936K 166960K 54695 0 kqueue 13 20K 31K 166960K 182 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 178 0 175 1 0 1 1 0 8 0 rtentry 112 571 0 484 4 1 3 4 0 8 0 unpcb 144 932 0 909 13 12 1 6 0 8 0 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpqe 32 8 0 8 3 3 0 1 0 8 0 tcpcb 808 295 0 291 9 7 2 5 0 8 1 arp 120 102 0 86 1 0 1 1 0 8 0 inpcb 336 1150 0 1142 10 8 2 4 0 8 1 nd6 136 147 0 127 1 0 1 1 0 8 0 pkpcb 40 2 0 2 2 2 0 1 0 8 0 kcovpl 48 49 0 41 1 0 1 1 0 8 0 ppxss 1168 6 0 6 3 3 0 1 0 8 0 pfstscr 40 3 0 3 2 2 0 1 0 8 0 pffrag 232 8 0 7 1 0 1 1 0 482 0 pffrnode 88 8 0 7 1 0 1 1 0 8 0 pffrent 40 12 0 11 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 1 0 1 1 1 0 1 0 8 0 pfstitem 24 149 0 135 1 0 1 1 0 8 0 pfstkey 128 153 0 139 3 0 3 3 0 8 0 pfstate 376 151 0 138 8 0 8 8 0 8 3 pfrule 1344 29 0 24 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 2303 0 1905 32 4 28 31 0 8 3 art_table 32 2305 0 1905 4 0 4 4 0 8 0 art_node 16 570 0 492 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 66 0 56 1 0 1 1 0 8 0 shmpl 112 14 0 1 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3101 0 1515 100 0 100 100 0 8 0 ffsino 272 3101 0 1515 106 0 106 106 0 8 0 nchpl 144 4499 0 2748 67 2 65 65 0 8 0 uvmvnodes 80 4115 0 0 84 0 84 84 0 8 0 vnodes 216 4115 0 0 229 0 229 229 0 8 0 namei 1024 19067 0 19067 5 4 1 2 0 8 1 percpumem 16 101 0 55 1 0 1 1 0 8 0 kstatmem 264 134 0 110 2 0 2 2 0 8 0 scsiplug 72 3 0 3 2 2 0 1 0 8 0 scxspl 216 29554 0 29554 11 10 1 8 1 8 1 plimitpl 152 205 0 188 1 0 1 1 0 8 0 sigapl 424 1767 0 1695 10 1 9 9 0 8 0 futexpl 64 13217 0 13210 3 2 1 1 0 8 0 knotepl 120 578 0 0 17 0 17 17 0 8 0 kqueuepl 216 355 0 346 7 6 1 3 0 8 0 pipepl 320 455 0 428 8 5 3 8 0 8 0 fdescpl 496 1727 0 1696 8 3 5 5 0 8 0 filepl 152 9161 0 8906 26 14 12 15 0 8 1 lockfpl 104 396 0 394 1 0 1 1 0 8 0 lockfspl 48 115 0 113 1 0 1 1 0 8 0 sessionpl 144 65 0 56 1 0 1 1 0 8 0 pgrppl 48 189 0 172 1 0 1 1 0 8 0 ucredpl 104 1127 0 1112 1 0 1 1 0 8 0 zombiepl 144 1697 0 1695 1 0 1 1 0 8 0 processpl 1160 1767 0 1695 7 1 6 6 0 8 0 procpl 648 3148 0 3069 10 2 8 8 0 8 0 srpgc 96 8 0 8 4 4 0 1 0 8 0 sosppl 168 10 0 10 4 4 0 1 0 8 0 sockpl 664 2272 0 2238 28 23 5 14 0 8 2 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 265 0 0 34 0 34 34 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 381 0 0 21 0 21 21 0 8 0 bufpl 280 8832 0 1658 513 0 513 513 0 8 0 anonpl 24 282268 0 277957 65 12 53 57 0 185 16 amapchunkpl 152 42998 0 42452 46 14 32 36 0 158 10 amappl16 200 5265 0 5255 29 19 10 15 0 8 8 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 197 0 185 1 0 1 1 0 8 0 amappl13 176 47 0 46 1 0 1 1 0 8 0 amappl12 168 3012 0 2978 3 1 2 2 0 8 0 amappl11 160 98 0 84 1 0 1 1 0 8 0 amappl10 152 44 0 44 1 1 0 1 0 8 0 amappl9 144 125 0 125 1 1 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 190 0 176 1 0 1 1 0 8 0 amappl6 120 579 0 575 1 0 1 1 0 8 0 amappl5 112 294 0 282 1 0 1 1 0 8 0 amappl4 104 428 0 406 1 0 1 1 0 8 0 amappl3 96 8510 0 8398 5 1 4 4 0 8 0 amappl2 88 1248 0 1176 2 0 2 2 0 8 0 amappl1 80 14430 0 13858 15 1 14 14 0 8 0 amappl 88 12715 0 12539 5 0 5 5 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 128 254 0 254 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 16 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1727 0 1695 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1727 0 1695 1 0 1 1 0 8 0 vmmpekpl 168 15791 0 15742 4 0 4 4 0 8 0 vmmpepl 168 111583 0 109737 112 19 93 95 0 357 12 vmsppl 440 1726 0 1694 6 2 4 5 0 8 0 rwobjpl 56 37062 0 31986 74 1 73 73 0 8 0 pdppl 4096 3461 0 3388 153 78 75 83 0 8 2 pvpl 32 30695 0 0 247 0 247 247 0 265 0 pmappl 248 1726 0 1694 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 487 0 108 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83464ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff835138c0) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835138c0) at __mp_lock+0x19e sys/kern/kern_lock.c:144 uvn_detach(fffffd807ec28500) at uvn_detach+0x28 sys/uvm/uvm_vnode.c:310 uvm_unmap_detach(ffff800029fe57c0,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1364 uvm_map_teardown(fffffd8009302000) at uvm_map_teardown+0x35e sys/uvm/uvm_map.c:2518 uvmspace_free(fffffd8009302000) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3422 reaper(ffff800029fd87a0) at reaper+0x246 sys/kern/kern_exit.c:480 end trace frame: 0x0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff83464ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff835138c0) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835138c0) at __mp_lock+0x19e sys/kern/kern_lock.c:144 uvn_detach(fffffd807ec28500) at uvn_detach+0x28 sys/uvm/uvm_vnode.c:310 uvm_unmap_detach(ffff800029fe57c0,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1364 uvm_map_teardown(fffffd8009302000) at uvm_map_teardown+0x35e sys/uvm/uvm_map.c:2518 uvmspace_free(fffffd8009302000) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3422 reaper(ffff800029fd87a0) at reaper+0x246 sys/kern/kern_exit.c:480 end trace frame: 0x0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at memset+0x49: repe stosb %es:(%rdi) memset() at memset+0x49 ffs_write(ffff80002a0b89d0) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd80620ba548,ffff80002a0b8a88,3,fffffd807f7d37b8) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a16b710,fffffd80620ba548,fffffd807f7d37b8,ffff80002a0b8b58,ffff80002a0b8b30) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:682 ktrstruct(ffff80002a16b710,ffffffff82fff9a0,ffff80002a0b8c50,10) at ktrstruct+0x19a sys/kern/kern_ktrace.c:308 sys_nanosleep(ffff80002a16b710,ffff80002a0b8d90,ffff80002a0b8ce0) at sys_nanosleep+0x109 sys/kern/kern_time.c:292 syscall(ffff80002a0b8d90) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0b8d90) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cd8a68cae80, count: 7 ddb{1}> trace memset() at memset+0x49 ffs_write(ffff80002a0b89d0) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd80620ba548,ffff80002a0b8a88,3,fffffd807f7d37b8) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a16b710,fffffd80620ba548,fffffd807f7d37b8,ffff80002a0b8b58,ffff80002a0b8b30) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:682 ktrstruct(ffff80002a16b710,ffffffff82fff9a0,ffff80002a0b8c50,10) at ktrstruct+0x19a sys/kern/kern_ktrace.c:308 sys_nanosleep(ffff80002a16b710,ffff80002a0b8d90,ffff80002a0b8ce0) at sys_nanosleep+0x109 sys/kern/kern_time.c:292 syscall(ffff80002a0b8d90) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0b8d90) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cd8a68cae80, count: -8