panic: ffs_blkfree: bad size Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *517432 3391 0 0 0x4000000 0K syz-executor.3 328276 15788 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ef3ea) at panic+0x17b sys/kern/subr_prf.c:198 ffs_blkfree(fffffd8066fa2de0,3,4000) at ffs_blkfree+0xa42 sys/ufs/ffs/ffs_alloc.c:1296 ffs_indirtrunc(fffffd8066fa2de0,fffffffffffffff4,e3b20,ffffffffffffffff,0,ffff8000374c2458) at ffs_indirtrunc+0x65d sys/ufs/ffs/ffs_inode.c:543 ffs_truncate(fffffd8066fa2de0,0,0,ffffffffffffffff) at ffs_truncate+0xfa5 sys/ufs/ffs/ffs_inode.c:335 ufs_inactive(ffff8000374c2618) at ufs_inactive+0x152 sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd8067a49c00,ffff80002a1c9ab0) at VOP_INACTIVE+0xc5 sys/kern/vfs_vops.c:489 vrele(fffffd8067a49c00) at vrele+0xd3 sys/kern/vfs_subr.c:827 ktrsettrace(ffffffff82d936c0,80001419,fffffd80659a12d0,fffffd807f7d6680) at ktrsettrace+0xb7 sys/kern/kern_ktrace.c:122 ktrops(ffff80002a1c9ab0,ffffffff82d936c0,0,80001419,fffffd80659a12d0,fffffd807f7d6680) at ktrops+0x1a8 sys/kern/kern_ktrace.c:564 doktrace(fffffd80659a12d0,0,1419,0,ffff80002a1c9ab0) at doktrace+0xeb sys/kern/kern_ktrace.c:510 sys_ktrace(ffff80002a1c9ab0,ffff8000374c29b0,ffff8000374c2a00) at sys_ktrace+0xd6 sys/kern/kern_ktrace.c:549 syscall(ffff8000374c2a60) at syscall+0x42c sys/arch/amd64/amd64/trap.c:591 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd280d686bd0, count: 1 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: ffs_blkfree: bad size ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ef3ea) at panic+0x17b sys/kern/subr_prf.c:198 ffs_blkfree(fffffd8066fa2de0,3,4000) at ffs_blkfree+0xa42 sys/ufs/ffs/ffs_alloc.c:1296 ffs_indirtrunc(fffffd8066fa2de0,fffffffffffffff4,e3b20,ffffffffffffffff,0,ffff8000374c2458) at ffs_indirtrunc+0x65d sys/ufs/ffs/ffs_inode.c:543 ffs_truncate(fffffd8066fa2de0,0,0,ffffffffffffffff) at ffs_truncate+0xfa5 sys/ufs/ffs/ffs_inode.c:335 ufs_inactive(ffff8000374c2618) at ufs_inactive+0x152 sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd8067a49c00,ffff80002a1c9ab0) at VOP_INACTIVE+0xc5 sys/kern/vfs_vops.c:489 vrele(fffffd8067a49c00) at vrele+0xd3 sys/kern/vfs_subr.c:827 ktrsettrace(ffffffff82d936c0,80001419,fffffd80659a12d0,fffffd807f7d6680) at ktrsettrace+0xb7 sys/kern/kern_ktrace.c:122 ktrops(ffff80002a1c9ab0,ffffffff82d936c0,0,80001419,fffffd80659a12d0,fffffd807f7d6680) at ktrops+0x1a8 sys/kern/kern_ktrace.c:564 doktrace(fffffd80659a12d0,0,1419,0,ffff80002a1c9ab0) at doktrace+0xeb sys/kern/kern_ktrace.c:510 sys_ktrace(ffff80002a1c9ab0,ffff8000374c29b0,ffff8000374c2a00) at sys_ktrace+0xd6 sys/kern/kern_ktrace.c:549 syscall(ffff8000374c2a60) at syscall+0x42c sys/arch/amd64/amd64/trap.c:591 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd280d686bd0, count: -14 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000374c2140 rbx 0xffffffff82b97ba7 cpu_info_full_primary+0x2ba7 rdx 0xffff800000d50500 rcx 0xffff80002a1c9ab0 rax 0xffffffff82b96ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4465bd3107c8e327 r11 0x94e0c474aa355b00 r12 0xffffffff82b979a8 cpu_info_full_primary+0x29a8 r13 0 r14 0 r15 0x1 rip 0xffffffff81d4536c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff8000374c2130 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.3) tid=517432 pid=3391 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=80, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a24f7f8,0xffff80002a1c5ac8 process=0xffff8000ffff1938 user=0xffff8000374bd000, vmspace=0xfffffd8065dea940 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 91724 185885 71414 0 2 0 syz-executor.7 91724 216027 71414 0 3 0x4000080 fsleep syz-executor.7 91724 112806 71414 0 2 0x4000000 syz-executor.7 3391 393132 69271 0 2 0 syz-executor.3 * 3391 517432 69271 0 7 0x4000000 syz-executor.3 40697 442658 29420 0 2 0 syz-executor.6 40697 180618 29420 0 3 0x4000080 fsleep syz-executor.6 40697 192341 29420 0 3 0x4000080 fsleep syz-executor.6 43379 406261 58130 0 2 0 syz-executor.2 43379 522236 58130 0 2 0x4000000 syz-executor.2 43379 277043 58130 0 2 0x4000000 syz-executor.2 97149 359669 55473 0 2 0 syz-executor.5 97149 356653 55473 0 3 0x4000080 fsleep syz-executor.5 97149 5246 55473 0 3 0x4000080 netio syz-executor.5 83890 374954 0 0 3 0x14280 nfsidl nfsio 35750 46816 0 0 3 0x14280 nfsidl nfsio 59320 288379 0 0 3 0x14280 nfsidl nfsio 93882 42592 0 0 3 0x14280 nfsidl nfsio 64298 283874 0 0 3 0x14280 nfsidl nfsio 84565 62567 0 0 3 0x14280 nfsidl nfsio 1636 303021 0 0 3 0x14280 nfsidl nfsio 17095 26088 0 0 3 0x14280 nfsidl nfsio 1361 10837 0 0 3 0x14280 nfsidl nfsio 88431 216728 0 0 3 0x14280 nfsidl nfsio 78606 395909 0 0 3 0x14280 nfsidl nfsio 28307 256414 0 0 3 0x14280 nfsidl nfsio 61752 227028 0 0 3 0x14280 nfsidl nfsio 58365 261810 0 0 3 0x14280 nfsidl nfsio 80415 478633 0 0 3 0x14280 nfsidl nfsio 91934 149791 0 0 3 0x14280 nfsidl nfsio 71788 320975 0 0 3 0x14280 nfsidl nfsio 99866 338699 0 0 3 0x14280 nfsidl nfsio 88480 100983 0 0 3 0x14280 nfsidl nfsio 63884 284880 0 0 3 0x14280 nfsidl nfsio 41194 468493 1 0 3 0x100083 ttyin getty 29420 457181 95470 0 3 0x82 nanoslp syz-executor.6 55473 195077 95470 0 3 0x82 nanoslp syz-executor.5 98464 229305 95470 0 2 0x2 syz-executor.1 69271 67189 95470 0 3 0x82 nanoslp syz-executor.3 71414 310493 95470 0 2 0x2 syz-executor.7 64655 21377 95470 0 2 0x482 syz-executor.4 58130 396173 95470 0 2 0x482 syz-executor.2 73558 250817 95470 0 2 0x482 syz-executor.0 17280 5604 0 0 3 0x14200 acct acct 20175 43946 0 0 3 0x14200 bored sosplice 95470 99007 33871 0 3 0x2000082 thrsleep syz-fuzzer 95470 150643 33871 0 2 0x6000482 syz-fuzzer 95470 503980 33871 0 3 0x6000082 wait syz-fuzzer 95470 122049 33871 0 3 0x6000082 wait syz-fuzzer 95470 156772 33871 0 3 0x6000082 thrsleep syz-fuzzer 95470 418854 33871 0 3 0x6000082 wait syz-fuzzer 95470 192916 33871 0 3 0x6000082 wait syz-fuzzer 95470 158703 33871 0 3 0x6000082 wait syz-fuzzer 95470 165426 33871 0 3 0x6000082 thrsleep syz-fuzzer 95470 403927 33871 0 3 0x6000082 wait syz-fuzzer 95470 370498 33871 0 3 0x6000082 thrsleep syz-fuzzer 95470 200970 33871 0 3 0x6000082 thrsleep syz-fuzzer 95470 262328 33871 0 3 0x6000082 wait syz-fuzzer 95470 20166 33871 0 3 0x6000082 kqread syz-fuzzer 95470 251245 33871 0 3 0x6000082 wait syz-fuzzer 95470 344870 33871 0 3 0x6000082 thrsleep syz-fuzzer 33871 67621 20196 0 3 0x10008a sigsusp ksh 20196 136958 90943 0 3 0x9a kqread sshd 90943 97488 1 0 3 0x88 kqread sshd 76916 201754 9681 74 3 0x1100092 bpf pflogd 9681 331201 1 0 3 0x80 netio pflogd 88246 178898 59170 73 3 0x1100090 kqread syslogd 59170 392623 1 0 3 0x100082 netio syslogd 33218 61524 1 0 3 0x100080 kqread resolvd 60588 512510 63749 77 3 0x100092 kqread dhcpleased 63914 125713 63749 77 3 0x100092 kqread dhcpleased 63749 493349 1 0 3 0x80 kqread dhcpleased 20366 468111 0 0 3 0x14200 bored smr 38255 309712 0 0 2 0x14200 zerothread 33632 515912 0 0 3 0x14200 aiodoned aiodoned 74643 179676 0 0 3 0x14200 syncer update 55073 64337 0 0 3 0x14200 cleaner cleaner 15788 328276 0 0 7 0x14200 reaper 12849 159064 0 0 3 0x14200 pgdaemon pagedaemon 96624 216734 0 0 3 0x14200 bored viomb 57730 522968 0 0 3 0x40014200 acpi0 acpi0 7671 187370 0 0 3 0x40014200 idle1 9642 219509 0 0 3 0x14200 bored softnet3 44521 47546 0 0 3 0x14200 bored softnet2 81550 474385 0 0 3 0x14200 bored softnet1 36188 457284 0 0 3 0x14200 bored softnet0 7719 208158 0 0 3 0x14200 bored systqmp 7760 289277 0 0 3 0x14200 bored systq 46616 523414 0 0 3 0x14200 tmoslp softclockmp 34832 206526 0 0 2 0x40014200 softclock 8393 291848 0 0 3 0x40014200 idle0 1 178687 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 3391 (syz-executor.3) thread 0xffff80002a1c9ab0 (517432) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10216 6503K 7202K 166960K 18996 0 pcb 15 18K 20K 166960K 423 0 rtable 252 15K 15K 166960K 911 0 pf 34 9K 10K 166960K 142 0 ifaddr 47 16K 16K 166960K 128 0 ifgroup 59 2K 2K 166960K 214 0 sysctl 4 1K 1K 166960K 8 0 counters 66 36K 36K 166960K 148 0 ioctlops 0 0K 4K 166960K 1685 0 iov 1 2K 24K 166960K 769 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1441 90K 91K 166960K 5630 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 45 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 13 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 15 53K 97K 166960K 6093 0 sigio 0 0K 0K 166960K 948 0 proc 73 91K 140K 166960K 1129 0 subproc 104 6K 6K 166960K 255 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 539 0 in_multi 100 7K 7K 166960K 243 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 985 0 tdb 3 0K 0K 166960K 3 0 pagedep 1 8K 8K 166960K 1 0 inodedep 1 32K 32K 166960K 1 0 newblk 1 0K 0K 166960K 1 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 397 92K 105K 166960K 63343 0 UVM aobj 131 4K 4K 166960K 136 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 1975 0 NDP 13 0K 1K 166960K 92 0 temp 74 5932K 6064K 166960K 28585 0 kqueue 12 18K 26K 166960K 396 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 327 0 324 6 5 1 3 0 8 0 rtentry 112 257 0 141 4 0 4 4 0 8 0 unpcb 144 4559 0 4542 66 65 1 6 0 8 0 syncache 312 62 0 62 11 11 0 1 0 8 0 sackhl 24 3 0 3 1 1 0 1 0 8 0 tcpqe 32 200 0 200 9 9 0 1 0 8 0 tcpcb 808 5801 0 5786 105 98 7 15 0 8 3 arp 120 49 0 28 1 0 1 1 0 8 0 inpcb 368 8304 0 8285 110 104 6 14 0 8 3 nd6 136 63 0 36 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 kcovpl 48 19 0 11 1 0 1 1 0 8 0 ppxss 1256 12 0 12 5 5 0 1 0 8 0 pffrag 232 3 0 3 1 1 0 1 0 482 0 pffrnode 88 3 0 3 1 1 0 1 0 8 0 pffrent 40 11 0 11 2 2 0 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 pfstitem 24 174 0 158 1 0 1 1 0 8 0 pfstkey 128 174 0 158 2 0 2 2 0 8 0 pfstate 376 174 0 158 5 2 3 4 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 256 986 0 514 40 10 30 30 0 8 0 art_table 32 987 0 514 4 0 4 4 0 8 0 art_node 16 254 0 149 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 8 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 10638 0 9170 93 0 93 93 0 8 0 ffsino 272 10638 0 9170 99 0 99 99 0 8 0 nchpl 144 19333 0 17673 64 0 64 64 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 72329 0 72329 6 5 1 2 0 8 1 percpumem 16 88 0 41 1 0 1 1 0 8 0 vcpupl 2048 13 0 1 2 0 2 2 0 8 0 vmpool 696 15 0 3 2 0 2 2 0 8 0 kstatmem 264 108 0 82 2 0 2 2 0 8 0 scxspl 216 56784 0 56784 21 20 1 8 1 8 1 plimitpl 152 910 0 894 1 0 1 1 0 8 0 sigapl 424 6599 0 6529 16 7 9 9 0 8 0 futexpl 64 54576 0 54572 1 0 1 1 0 8 0 knotepl 120 846 0 0 20 2 18 18 0 8 0 kqueuepl 216 982 0 974 16 15 1 7 0 8 0 pipepl 320 3412 0 3384 79 76 3 13 0 8 0 fdescpl 496 6379 0 6351 10 6 4 5 0 8 0 filepl 152 54813 0 54532 97 79 18 22 0 8 6 lockfpl 104 2101 0 2098 6 5 1 2 0 8 0 lockfspl 48 710 0 707 1 0 1 1 0 8 0 sessionpl 144 36 0 19 1 0 1 1 0 8 0 pgrppl 48 259 0 242 1 0 1 1 0 8 0 ucredpl 104 9899 0 9883 1 0 1 1 0 8 0 zombiepl 144 6531 0 6529 1 0 1 1 0 8 0 processpl 1072 6599 0 6529 5 0 5 5 0 8 0 procpl 680 17871 0 17774 12 3 9 10 0 8 0 srpgc 96 21 0 21 8 8 0 1 0 8 0 sosppl 168 54 0 54 6 5 1 1 0 8 1 sockpl 488 13205 0 13166 294 284 10 33 0 8 4 mcl64k 65536 19 0 0 3 1 2 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 12 0 0 1 0 1 1 0 8 0 mcl8k 8192 18 0 0 3 0 3 3 0 8 0 mcl4k 4096 33 0 0 3 0 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 323 0 0 38 6 32 38 0 8 0 mtagpl 96 214 0 0 5 0 5 5 0 8 0 mbufpl 256 1308 0 0 69 0 69 69 0 8 0 bufpl 288 14270 0 7946 453 1 452 453 0 8 0 anonpl 24 834356 0 815474 197 82 115 136 0 186 0 amapchunkpl 152 199842 0 198909 67 27 40 46 0 158 0 amappl16 200 22126 0 21470 122 87 35 47 0 8 0 amappl15 192 26 0 24 1 0 1 1 0 8 0 amappl14 184 214 0 199 2 1 1 2 0 8 0 amappl13 176 46 0 45 1 0 1 1 0 8 0 amappl12 168 7223 0 7195 4 2 2 3 0 8 0 amappl11 160 57 0 43 1 0 1 1 0 8 0 amappl10 152 50 0 37 1 0 1 1 0 8 0 amappl9 144 346 0 346 1 0 1 1 0 8 1 amappl8 136 407 0 310 5 1 4 4 0 8 0 amappl7 128 227 0 198 2 0 2 2 0 8 0 amappl6 120 479 0 469 1 0 1 1 0 8 0 amappl5 112 203 0 192 1 0 1 1 0 8 0 amappl4 104 573 0 543 2 1 1 2 0 8 0 amappl3 96 38863 0 38778 3 0 3 3 0 8 0 amappl2 88 7206 0 7127 3 1 2 3 0 8 0 amappl1 80 31948 0 31388 23 9 14 23 0 8 0 amappl 88 62483 0 62239 9 2 7 7 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 128 253 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 72 135 0 5 3 0 3 3 0 8 0 uaddrrnd 24 6394 0 6354 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6394 0 6354 1 0 1 1 0 8 0 vmmpekpl 168 61161 0 61095 4 0 4 4 0 8 0 vmmpepl 168 402866 0 400247 237 117 120 136 0 357 0 vmsppl 464 6393 0 6353 7 1 6 6 0 8 0 rwobjpl 56 114095 0 106240 117 5 112 112 0 8 0 pdppl 4096 12796 0 12718 397 315 82 86 0 8 4 pvpl 32 45422 0 0 367 0 367 367 0 265 0 pmappl 248 6393 0 6353 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1459 0 561 27 0 27 27 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ef3ea) at panic+0x17b sys/kern/subr_prf.c:198 ffs_blkfree(fffffd8066fa2de0,3,4000) at ffs_blkfree+0xa42 sys/ufs/ffs/ffs_alloc.c:1296 ffs_indirtrunc(fffffd8066fa2de0,fffffffffffffff4,e3b20,ffffffffffffffff,0,ffff8000374c2458) at ffs_indirtrunc+0x65d sys/ufs/ffs/ffs_inode.c:543 ffs_truncate(fffffd8066fa2de0,0,0,ffffffffffffffff) at ffs_truncate+0xfa5 sys/ufs/ffs/ffs_inode.c:335 ufs_inactive(ffff8000374c2618) at ufs_inactive+0x152 sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd8067a49c00,ffff80002a1c9ab0) at VOP_INACTIVE+0xc5 sys/kern/vfs_vops.c:489 vrele(fffffd8067a49c00) at vrele+0xd3 sys/kern/vfs_subr.c:827 ktrsettrace(ffffffff82d936c0,80001419,fffffd80659a12d0,fffffd807f7d6680) at ktrsettrace+0xb7 sys/kern/kern_ktrace.c:122 ktrops(ffff80002a1c9ab0,ffffffff82d936c0,0,80001419,fffffd80659a12d0,fffffd807f7d6680) at ktrops+0x1a8 sys/kern/kern_ktrace.c:564 doktrace(fffffd80659a12d0,0,1419,0,ffff80002a1c9ab0) at doktrace+0xeb sys/kern/kern_ktrace.c:510 sys_ktrace(ffff80002a1c9ab0,ffff8000374c29b0,ffff8000374c2a00) at sys_ktrace+0xd6 sys/kern/kern_ktrace.c:549 syscall(ffff8000374c2a60) at syscall+0x42c sys/arch/amd64/amd64/trap.c:591 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd280d686bd0, count: -14 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029d2bff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82ca58a8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82ca58a8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff80002a1922c0,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1382 uvm_map_teardown(fffffd806efba748) at uvm_map_teardown+0x2f5 sys/uvm/uvm_map.c:2585 uvmspace_free(fffffd806efba748) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3503 reaper(ffff80002a1867f0) at reaper+0x19a sys/kern/kern_exit.c:458 end trace frame: 0x0, count: 7 ddb{1}> trace x86_ipi_db(ffff800029d2bff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82ca58a8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82ca58a8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff80002a1922c0,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1382 uvm_map_teardown(fffffd806efba748) at uvm_map_teardown+0x2f5 sys/uvm/uvm_map.c:2585 uvmspace_free(fffffd806efba748) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3503 reaper(ffff80002a1867f0) at reaper+0x19a sys/kern/kern_exit.c:458 end trace frame: 0x0, count: -8