ppanic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_map.c", line 2539 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 91512 13444 0 0x2 0 0 syz-executor.5 *203577 38577 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff827d7b29,9eb,ffffffff827874a1) at __assert+0x25 sys/kern/subr_prf.c:157 uvm_map_teardown(fffffd8079ba2528) at uvm_map_teardown+0x308 sys/uvm/uvm_map.c:2541 uvmspace_free(fffffd8079ba2528) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3516 reaper(ffff8000211bd058) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: 9 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 *cpu0: vop_generic_badop cpu1: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_map.c", line 2539 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff827d7b29,9eb,ffffffff827874a1) at __assert+0x25 sys/kern/subr_prf.c:157 uvm_map_teardown(fffffd8079ba2528) at uvm_map_teardown+0x308 sys/uvm/uvm_map.c:2541 uvmspace_free(fffffd8079ba2528) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3516 reaper(ffff8000211bd058) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -6 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000211c90c0 rbx 0xffff800020d69b8f rdx 0 rcx 0 rax 0xffff8000211bd058 r8 0x101010101010101 r9 0x8080808080808080 r10 0x314c5374c9689056 r11 0x5751184769d123ec r12 0xffff800020d69990 r13 0 r14 0xffffffff82b25990 cpu_info_full_primary+0x2990 r15 0x1 rip 0xffffffff81b420b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000211c90b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (reaper) pid=203577 stat=onproc flags process=14000 proc=200 pri=4, usrpri=59, nice=20 forw=0xffffffffffffffff, list=0xffff8000211bd5c8,0xffff8000211bcaf8 process=0xffff8000ffffee10 user=0xffff8000211c4000, vmspace=0xffffffff82db7ec8 estcpu=9, cpticks=9, pctcpu=0.93 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 84946 7161 51575 0 2 0 syz-executor.3 19110 86077 52029 0 3 0x80 nanoslp syz-executor.0 19110 244046 52029 0 3 0x4000080 fsleep syz-executor.0 19110 175849 52029 0 3 0x4000080 fsleep syz-executor.0 68039 88941 97854 0 3 0x80 nanoslp syz-executor.7 68039 187234 97854 0 2 0x4000000 syz-executor.7 68039 6043 97854 0 3 0x4000080 fsleep syz-executor.7 52029 31623 64124 0 3 0x82 nanoslp syz-executor.0 51575 156141 64124 0 3 0x82 nanoslp syz-executor.3 80121 453561 64124 0 2 0x2 syz-executor.4 66739 50574 64124 0 2 0x2 syz-executor.6 51057 486968 64124 0 3 0x82 nanoslp syz-executor.2 10434 10142 64124 0 3 0x2 biowait syz-executor.1 97854 329852 64124 0 3 0x82 nanoslp syz-executor.7 13444 91512 64124 0 7 0x2 syz-executor.5 93656 240797 1 0 3 0x100083 ttyin getty 99143 67738 0 0 3 0x14280 nfsidl nfsio 12104 367544 0 0 3 0x14280 nfsidl nfsio 56834 165088 0 0 3 0x14280 nfsidl nfsio 60882 216752 0 0 3 0x14280 nfsidl nfsio 34674 10022 0 0 3 0x14280 nfsidl nfsio 48908 461502 0 0 3 0x14280 nfsidl nfsio 9635 397420 0 0 3 0x14280 nfsidl nfsio 99959 179712 0 0 3 0x14280 nfsidl nfsio 10446 472957 0 0 3 0x14280 nfsidl nfsio 2035 122653 0 0 3 0x14280 nfsidl nfsio 9521 344857 0 0 3 0x14280 nfsidl nfsio 70334 143765 0 0 3 0x14280 nfsidl nfsio 25855 128588 0 0 3 0x14280 nfsidl nfsio 2782 288209 0 0 3 0x14280 nfsidl nfsio 11098 293876 0 0 3 0x14280 nfsidl nfsio 3458 395792 0 0 3 0x14280 nfsidl nfsio 42666 188868 0 0 3 0x14280 nfsidl nfsio 33432 50389 0 0 3 0x14280 nfsidl nfsio 19391 451921 0 0 3 0x14280 nfsidl nfsio 48761 253738 0 0 3 0x14280 nfsidl nfsio 91325 166792 0 0 3 0x14200 acct acct 67822 5527 0 0 3 0x14200 bored sosplice 64124 323196 90861 0 3 0x82 wait syz-fuzzer 64124 118079 90861 0 3 0x4000082 nanoslp syz-fuzzer 64124 47644 90861 0 3 0x4000082 wait syz-fuzzer 64124 146880 90861 0 3 0x4000082 wait syz-fuzzer 64124 146555 90861 0 3 0x4000082 wait syz-fuzzer 64124 209548 90861 0 3 0x4000082 thrsleep syz-fuzzer 64124 251960 90861 0 3 0x4000082 thrsleep syz-fuzzer 64124 28618 90861 0 3 0x4000082 wait syz-fuzzer 64124 97853 90861 0 3 0x4000082 thrsleep syz-fuzzer 64124 360674 90861 0 3 0x4000082 wait syz-fuzzer 64124 377611 90861 0 3 0x4000082 thrsleep syz-fuzzer 64124 395677 90861 0 3 0x4000082 kqread syz-fuzzer 64124 409981 90861 0 3 0x4000082 thrsleep syz-fuzzer 64124 226409 90861 0 3 0x4000082 thrsleep syz-fuzzer 64124 378571 90861 0 3 0x4000082 wait syz-fuzzer 64124 91868 90861 0 3 0x4000082 wait syz-fuzzer 90861 384841 52440 0 3 0x10008a sigsusp ksh 52440 134846 69692 0 3 0x9a kqread sshd 69692 478402 1 0 3 0x88 kqread sshd 79729 431872 91576 74 3 0x1100092 bpf pflogd 91576 10796 1 0 3 0x80 netio pflogd 48456 90682 9552 73 3 0x1100090 kqread syslogd 9552 96550 1 0 3 0x100082 netio syslogd 20401 397880 1 0 3 0x100080 kqread resolvd 46423 125932 0 0 3 0x14200 bored smr 42736 134201 0 0 2 0x14200 zerothread 74408 460871 0 0 3 0x14200 aiodoned aiodoned 69438 443592 0 0 3 0x14200 syncer update 78077 444684 0 0 3 0x14200 cleaner cleaner *38577 203577 0 0 7 0x14200 reaper 65829 59075 0 0 3 0x14200 pgdaemon pagedaemon 63679 356994 0 0 3 0x14200 bored viomb 87366 4105 0 0 3 0x40014200 acpi0 acpi0 35659 85280 0 0 3 0x40014200 idle1 83522 189665 0 0 3 0x14200 bored softnet 13503 157767 0 0 3 0x14200 bored softnet 88726 500570 0 0 3 0x14200 bored softnet 9667 483719 0 0 3 0x14200 bored softnet 74106 283711 0 0 3 0x14200 bored systqmp 28877 1914 0 0 3 0x14200 bored systq 76870 375929 0 0 3 0x40014200 bored softclock 35503 406853 0 0 3 0x40014200 idle0 1 335708 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10240 6520K 7353K 78643K 19435 0 pcb 13 18K 23K 78643K 1020 0 rtable 208 16K 18K 78643K 1739 0 ifaddr 87 27K 29K 78643K 653 0 sysctl 3 1K 3K 78643K 8 0 counters 60 35K 36K 78643K 494 0 ioctlops 0 0K 4K 78643K 2070 0 iov 0 0K 32K 78643K 591 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1395 87K 88K 78643K 4187 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 44 0 VM map 2 1K 1K 78643K 2 0 sem 11 1K 1K 78643K 17 0 dirhash 63 11K 12K 78643K 411 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 93K 78643K 6635 0 sigio 0 0K 0K 78643K 299 0 proc 66 67K 115K 78643K 1551 0 subproc 104 6K 6K 78643K 482 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 248 0 in_multi 85 5K 7K 78643K 657 0 ether_multi 1 0K 0K 78643K 34 0 mrt 1 0K 0K 78643K 29 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 217 970K 970K 78643K 217 0 exec 0 0K 1K 78643K 1341 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 333 90K 97K 78643K 46953 0 UVM aobj 131 4K 4K 78643K 143 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 311 0 NDP 16 0K 2K 78643K 221 0 temp 145 5778K 5854K 78643K 78767 0 kqueue 6 10K 24K 78643K 466 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 683 0 682 10 9 1 3 0 8 0 rtentry 112 582 0 498 5 2 3 4 0 8 0 unpcb 144 6304 0 6296 67 66 1 8 0 8 0 syncache 296 48 0 48 10 10 0 1 0 8 0 tcpqe 32 50 46 50 4 4 0 1 0 8 0 tcpcb 776 3316 0 3307 82 74 8 14 0 8 6 arp 120 82 0 68 1 0 1 1 0 8 0 inpcb 368 8666 0 8654 106 99 7 14 0 8 5 nd6 48 127 0 108 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 1 0 1 0 8 0 kcovpl 48 36 0 28 1 0 1 1 0 8 0 mppekey 1024 5 0 5 2 2 0 1 0 8 0 ppxss 1256 124 0 124 10 10 0 1 0 8 0 pppxif 1456 98 0 98 9 9 0 1 0 8 0 pfstscr 40 3 0 3 1 1 0 1 0 8 0 pffrag 232 33 0 33 2 2 0 1 0 482 0 pffrnode 88 33 0 33 2 2 0 1 0 8 0 pffrent 40 88 0 88 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 24 187 0 153 1 0 1 1 0 8 0 pfstkey 128 191 0 157 4 2 2 2 0 8 0 pfstate 384 188 0 154 10 6 4 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 8 0 8 3 3 0 1 0 8 0 art_heap8 4096 4 0 2 4 2 2 3 0 8 0 art_heap4 256 2649 0 2241 56 27 29 33 0 8 1 art_table 32 2653 0 2243 6 1 5 5 0 8 0 art_node 16 575 0 503 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 7 1 0 1 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 140 0 12 4 0 4 4 0 8 0 dirhash 1024 150 0 116 5 0 5 5 0 8 0 dino2pl 256 9910 0 8446 92 0 92 92 0 8 0 ffsino 272 9910 0 8446 98 0 98 98 0 8 0 nchpl 144 18747 0 17113 63 0 63 63 0 8 0 rtmask 32 4 0 4 2 2 0 1 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 71252 0 71250 3 2 1 2 0 8 0 percpumem 16 260 0 217 1 0 1 1 0 8 0 vmpool 696 45 0 45 3 3 0 1 0 8 0 kstatmem 264 262 0 230 6 3 3 3 0 8 0 scsiplug 72 7 0 7 2 2 0 1 0 8 0 scxspl 216 57364 0 57363 26 25 1 8 0 8 0 plimitpl 152 907 0 892 1 0 1 1 0 8 0 sigapl 424 6978 0 6915 11 3 8 9 0 8 0 futexpl 64 60531 0 60528 2 1 1 1 0 8 0 knotepl 120 568 0 0 11 0 11 11 0 8 0 kqueuepl 216 1381 0 1375 22 21 1 5 0 8 0 pipepl 320 2221 0 2193 51 48 3 8 0 8 0 fdescpl 496 6870 0 6847 5 1 4 5 0 8 0 filepl 152 54309 0 54017 99 86 13 22 0 8 1 lockfpl 104 2520 0 2519 3 2 1 2 0 8 0 lockfspl 48 519 0 518 1 0 1 1 0 8 0 sessionpl 144 53 0 37 1 0 1 1 0 8 0 pgrppl 48 171 0 155 1 0 1 1 0 8 0 ucredpl 104 5061 0 5051 1 0 1 1 0 8 0 zombiepl 144 6916 0 6915 2 1 1 1 0 8 0 processpl 1072 6978 0 6915 6 1 5 6 0 8 0 procpl 696 18694 0 18612 20 10 10 10 0 8 0 srpgc 96 44 0 44 12 12 0 1 0 8 0 sosppl 168 55 0 55 7 7 0 1 0 8 0 sockpl 488 15662 0 15641 322 311 11 27 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 15 0 0 2 0 2 2 0 8 0 mcl8k 8192 25 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 503 0 0 62 4 58 62 0 8 0 mtagpl 96 463 0 0 11 0 11 11 0 8 0 mbufpl 256 1423 0 0 76 0 76 76 0 8 0 bufpl 288 13771 0 7446 453 0 453 453 0 8 0 anonpl 24 1418945 0 1401549 219 94 125 192 0 186 0 amapchunkpl 152 131726 0 130982 71 37 34 63 0 158 0 amappl16 200 12833 0 12253 84 53 31 43 0 8 0 amappl15 192 53 0 50 1 0 1 1 0 8 0 amappl14 184 261 0 246 2 0 2 2 0 8 0 amappl13 176 4 0 4 2 2 0 1 0 8 0 amappl12 168 750 0 747 1 0 1 1 0 8 0 amappl11 160 51 0 43 1 0 1 1 0 8 0 amappl10 152 79 0 67 1 0 1 1 0 8 0 amappl9 144 1003 0 1003 12 12 0 1 0 8 0 amappl8 136 473 0 374 4 0 4 4 0 8 0 amappl7 128 240 0 214 2 0 2 2 0 8 0 amappl6 120 320 0 302 2 1 1 2 0 8 0 amappl5 112 333 0 326 1 0 1 1 0 8 0 amappl4 104 869 0 833 6 4 2 2 0 8 0 amappl3 96 19958 0 19917 2 0 2 2 0 8 0 amappl2 88 7715 0 7649 4 2 2 4 0 8 0 amappl1 80 157955 0 157338 31 15 16 28 0 8 0 amappl 88 45993 0 45808 8 2 6 6 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 72 142 0 12 3 0 3 3 0 8 0 uaddrrnd 24 6915 0 6891 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6915 0 6891 1 0 1 1 0 8 0 vmmpekpl 168 61360 0 61295 4 0 4 4 0 8 0 vmmpepl 168 641641 0 639132 217 82 135 146 0 357 0 vmsppl 440 6914 0 6891 6 2 4 5 0 8 0 rwobjpl 56 173177 0 165485 119 7 112 113 0 8 0 pdppl 4096 13837 0 13782 401 338 63 83 0 8 8 pvpl 32 2811409 0 2789115 486 278 208 366 0 265 0 pmappl 248 6914 0 6891 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1383 0 486 26 0 26 26 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82b24ff0) at x86_ipi_db+0x1a 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+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f sys/dev/kcov.c:148 __mp_lock(ffffffff82db6020) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82db6020) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff80002e424870,ffff80000006ba00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f Xspllower() at Xspllower+0x19 cnputc(70) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x6ac sys/kern/subr_prf.c:724 db_printf(ffffffff827d3cc9) at db_printf+0x85 sys/kern/subr_prf.c:498 panic(ffffffff82742aec) at panic+0xd7 sys/kern/subr_prf.c:216 vop_generic_badop(ffff80002e424c98) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 end trace frame: 0xffff80002e424ce0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82b24ff0) at x86_ipi_db+0x1a 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+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f sys/dev/kcov.c:148 __mp_lock(ffffffff82db6020) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82db6020) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff80002e424870,ffff80000006ba00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f Xspllower() at Xspllower+0x19 cnputc(70) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x6ac sys/kern/subr_prf.c:724 db_printf(ffffffff827d3cc9) at db_printf+0x85 sys/kern/subr_prf.c:498 panic(ffffffff82742aec) at panic+0xd7 sys/kern/subr_prf.c:216 vop_generic_badop(ffff80002e424c98) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd806f851958,fffffd807d688a40) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628 bwrite(fffffd807d688a40) at bwrite+0x1f0 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd807d688a40) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002e424f30) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1236 VOP_MKDIR(fffffd806558d548,ffff80002e425090,ffff80002e4250c0,ffff80002e424fc0) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff8000212d1080,ffffff9c,7f7fffffb7d0,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 syscall(ffff80002e425240) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e425240) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffb840, count: -22 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff827d7b29,9eb,ffffffff827874a1) at __assert+0x25 sys/kern/subr_prf.c:157 uvm_map_teardown(fffffd8079ba2528) at uvm_map_teardown+0x308 sys/uvm/uvm_map.c:2541 uvmspace_free(fffffd8079ba2528) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3516 reaper(ffff8000211bd058) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: 9 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff827d7b29,9eb,ffffffff827874a1) at __assert+0x25 sys/kern/subr_prf.c:157 uvm_map_teardown(fffffd8079ba2528) at uvm_map_teardown+0x308 sys/uvm/uvm_map.c:2541 uvmspace_free(fffffd8079ba2528) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3516 reaper(ffff8000211bd058) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -6