panic: tcpp_aonuitpc:u kt ernStopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *165655 64035 32767 0x10 0x4000000 0 syz-executor.3 501794 1800 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257b2ef) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000cd2748) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd80661693e0,fffffd807021e500,0,fffffd8069b96100) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff800029a3a2a0,3,ffff80002e4c7590,0,ffff80002e4c7680) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff800029a3a2a0,ffff80002e4c7638,ffff80002e4c7680) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002e4c7700) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4c7700) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x68f9b6b3850, count: 6 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: tcp_output cpu1: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_map.c", line 2486 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257b2ef) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000cd2748) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd80661693e0,fffffd807021e500,0,fffffd8069b96100) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff800029a3a2a0,3,ffff80002e4c7590,0,ffff80002e4c7680) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff800029a3a2a0,ffff80002e4c7638,ffff80002e4c7680) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002e4c7700) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4c7700) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x68f9b6b3850, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e4c7070 rbx 0xffffffff829a1b8f cpu_info_full_primary+0x2b8f rdx 0xffff800000be3580 rcx 0 rax 0xffff800029a3a2a0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe0d0bff94bb59795 r11 0x12352e22533b9099 r12 0xffffffff829a1990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff81a16d08 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e4c7060 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.3) pid=165655 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800029a60a90,0xffff800029a3ba50 process=0xffff800029a0e580 user=0xffff80002e4c2000, vmspace=0xfffffd8070012180 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 10871 379600 82669 32767 2 0x10 syz-executor.6 10871 521758 82669 32767 3 0x4000090 fsleep syz-executor.6 48789 188911 51180 32767 2 0x10 syz-executor.2 62533 120742 32081 32767 2 0x10 syz-executor.5 62533 504520 32081 32767 3 0x4000090 fsleep syz-executor.5 62533 247320 32081 32767 3 0x4000090 fsleep syz-executor.5 13962 359224 52714 32767 2 0x10 syz-executor.7 13962 168711 52714 32767 3 0x4000090 fsleep syz-executor.7 64035 35846 98765 32767 2 0x10 syz-executor.3 *64035 165655 98765 32767 7 0x4000010 syz-executor.3 82404 62424 49087 32767 3 0x90 nanoslp syz-executor.1 49087 174381 59431 0 3 0x82 wait syz-executor.1 10616 500751 0 0 3 0x14200 bored sosplice 98765 278653 66929 32767 2 0x10 syz-executor.3 82669 65544 48597 32767 3 0x90 nanoslp syz-executor.6 52714 475989 65857 32767 2 0x10 syz-executor.7 65857 486969 59431 0 3 0x82 wait syz-executor.7 48597 403657 59431 0 3 0x82 wait syz-executor.6 32081 236241 50362 32767 3 0x90 nanoslp syz-executor.5 50362 442112 59431 0 3 0x82 wait syz-executor.5 51180 459 8226 32767 3 0x90 nanoslp syz-executor.2 66929 60483 59431 0 3 0x82 wait syz-executor.3 89036 328637 83051 32767 3 0x90 nanoslp syz-executor.4 8226 278723 59431 0 3 0x82 wait syz-executor.2 70565 183988 75210 32767 2 0x10 syz-executor.0 83051 68158 59431 0 3 0x82 wait syz-executor.4 75210 267164 59431 0 3 0x82 wait syz-executor.0 59431 104741 25077 0 3 0x82 wait syz-fuzzer 59431 127489 25077 0 3 0x4000082 thrsleep syz-fuzzer 59431 415367 25077 0 3 0x4000082 wait syz-fuzzer 59431 356509 25077 0 3 0x4000082 thrsleep syz-fuzzer 59431 343087 25077 0 3 0x4000082 thrsleep syz-fuzzer 59431 364357 25077 0 3 0x4000082 wait syz-fuzzer 59431 496093 25077 0 3 0x4000082 wait syz-fuzzer 59431 140180 25077 0 3 0x4000082 thrsleep syz-fuzzer 59431 221774 25077 0 3 0x4000082 kqread syz-fuzzer 59431 72687 25077 0 3 0x4000082 wait syz-fuzzer 59431 10032 25077 0 3 0x4000082 wait syz-fuzzer 59431 289705 25077 0 3 0x4000082 wait syz-fuzzer 59431 430461 25077 0 3 0x4000082 wait syz-fuzzer 59431 206865 25077 0 3 0x4000082 thrsleep syz-fuzzer 59431 233024 25077 0 3 0x4000082 thrsleep syz-fuzzer 59431 262581 25077 0 3 0x4000082 thrsleep syz-fuzzer 25077 400560 65633 0 3 0x10008a sigsusp ksh 65633 209502 78096 0 3 0x9a kqread sshd 21416 148043 1 0 3 0x100083 ttyin getty 78096 354304 1 0 3 0x88 kqread sshd 17952 34324 64073 73 3 0x1100090 kqread syslogd 64073 156200 1 0 3 0x100082 netio syslogd 73156 284289 1 0 3 0x100080 kqread resolvd 71167 438811 88782 77 3 0x100092 kqread dhcpleased 46495 428690 88782 77 3 0x100092 kqread dhcpleased 88782 56157 1 0 3 0x80 kqread dhcpleased 76627 16827 0 0 3 0x14200 bored smr 63981 69587 0 0 2 0x14200 zerothread 21266 118865 0 0 3 0x14200 aiodoned aiodoned 36371 443343 0 0 3 0x14200 syncer update 40176 368538 0 0 3 0x14200 cleaner cleaner 1800 501794 0 0 7 0x14200 reaper 44371 82880 0 0 3 0x14200 pgdaemon pagedaemon 53403 224245 0 0 3 0x14200 bored viomb 74893 158192 0 0 3 0x40014200 acpi0 acpi0 85467 91793 0 0 3 0x40014200 idle1 15647 3050 0 0 3 0x14200 bored softnet 70334 94353 0 0 3 0x14200 bored softnet 42407 463923 0 0 3 0x14200 bored softnet 27147 58104 0 0 3 0x14200 bored softnet 69583 381825 0 0 3 0x14200 bored systqmp 67210 518064 0 0 3 0x14200 bored systq 66081 336646 0 0 3 0x40014200 bored softclock 50773 306469 0 0 3 0x40014200 idle0 1 179201 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive sched_lock &sched_lock r = 0 (0xffffffff82add530) #0 witness_lock+0x44d #1 wakeup_n+0x37 #2 uvm_pmr_freepages+0x306 sys/uvm/uvm_pmemrange.c:1304 #3 pmap_do_remove+0x666 sys/arch/amd64/amd64/pmap.c:1883 #4 uvm_unmap_kill_entry_withlock+0x1af sys/uvm/uvm_map.c:1891 #5 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #5 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2523 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 #7 reaper+0x19a sys/kern/kern_exit.c:448 #8 proc_trampoline+0x1c exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff82add780) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_pmr_freepages+0x10c sys/uvm/uvm_pmemrange.c:1289 #4 pmap_do_remove+0x666 sys/arch/amd64/amd64/pmap.c:1883 #5 uvm_unmap_kill_entry_withlock+0x1af sys/uvm/uvm_map.c:1891 #6 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #6 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2523 #7 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 #8 reaper+0x19a sys/kern/kern_exit.c:448 #9 proc_trampoline+0x1c Process 64035 (syz-executor.3) thread 0xffff800029a3a2a0 (165655) exclusive rwlock netlock r = 0 (0xffffffff8291ebe0) #0 witness_lock+0x44d #1 sosend+0x500 sys/kern/uipc_socket.c:632 #2 sendit+0x65d sys/kern/uipc_syscalls.c:694 #3 sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 #4 syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] #4 syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10200 6410K 6419K 78643K 11297 0 pcb 13 10K 12K 78643K 15 0 rtable 240 6K 7K 78643K 527 0 ifaddr 82 16K 16K 78643K 98 0 sysctl 0 0K 2K 78643K 2 0 counters 56 35K 35K 78643K 60 0 ioctlops 0 0K 2K 78643K 35 0 iov 0 0K 12K 78643K 392 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 2145 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 20 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 14 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 125K 78643K 2118 0 sigio 0 0K 0K 78643K 33 0 proc 56 78K 103K 78643K 616 0 subproc 104 6K 6K 78643K 130 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 974 0 in_multi 99 6K 6K 78643K 130 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 181 811K 811K 78643K 181 0 exec 0 0K 2K 78643K 874 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 62K 78643K 8 0 UVM amap 296 91K 100K 78643K 14413 0 UVM aobj 33 6K 6K 78643K 38 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 60 0 NDP 11 0K 2K 78643K 33 0 temp 124 4726K 4790K 78643K 8046 0 kqueue 12 18K 28K 78643K 211 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> 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 120 185 0 182 3 0 3 3 0 8 2 rtentry 112 138 0 25 4 0 4 4 0 8 0 unpcb 144 1640 0 1627 25 23 2 8 0 8 1 syncache 296 24 0 24 6 6 0 1 0 8 0 tcpqe 32 94 0 94 3 3 0 1 0 8 0 tcpcb 768 1261 0 1247 42 33 9 16 0 8 7 arp 120 23 0 4 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 368 2419 0 2408 45 36 9 13 0 8 7 nd6 48 34 0 8 1 0 1 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 572 0 110 30 0 30 30 0 8 1 art_table 32 573 0 110 4 0 4 4 0 8 0 art_node 16 137 0 34 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 3 2 1 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 35 0 5 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 4613 0 3181 90 0 90 90 0 8 0 ffsino 272 4613 0 3181 96 0 96 96 0 8 0 nchpl 144 7470 0 5828 63 0 63 63 0 8 0 uvmvnodes 80 4752 0 0 97 0 97 97 0 8 0 vnodes 216 4752 0 0 264 0 264 264 0 8 0 namei 1024 27897 0 27897 2 1 1 2 0 8 1 percpumem 16 42 0 2 1 0 1 1 0 8 0 kstatmem 264 26 0 4 2 0 2 2 0 8 0 scxspl 216 20151 0 20151 16 13 3 8 0 8 3 plimitpl 152 426 0 404 2 0 2 2 0 8 1 sigapl 424 2392 0 2337 7 0 7 7 0 8 0 futexpl 64 18680 0 18676 1 0 1 1 0 8 0 knotepl 120 202 0 0 5 0 5 5 0 8 0 kqueuepl 216 622 0 614 11 10 1 5 0 8 0 pipepl 320 485 0 457 14 8 6 8 0 8 3 fdescpl 496 2374 0 2340 7 2 5 6 0 8 0 filepl 152 18435 0 18197 41 24 17 18 0 8 7 lockfpl 104 168 0 165 1 0 1 1 0 8 0 lockfspl 48 80 0 77 1 0 1 1 0 8 0 sessionpl 144 25 0 9 1 0 1 1 0 8 0 pgrppl 48 39 0 23 1 0 1 1 0 8 0 ucredpl 104 5530 0 5512 1 0 1 1 0 8 0 zombiepl 144 2340 0 2337 1 0 1 1 0 8 0 processpl 1064 2392 0 2337 5 1 4 5 0 8 0 procpl 672 6508 0 6431 12 4 8 9 0 8 1 sosppl 168 30 0 30 5 5 0 1 0 8 0 sockpl 488 4296 0 4271 102 91 11 28 0 8 7 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 15 0 0 2 0 2 2 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 45 0 0 5 0 5 5 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 253 0 0 31 0 31 31 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 418 0 0 23 0 23 23 0 8 0 bufpl 288 6642 0 312 453 0 453 453 0 8 0 anonpl 24 451063 0 438361 129 46 83 102 0 186 0 amapchunkpl 152 41451 0 40785 65 31 34 41 0 158 6 amappl16 200 6102 0 5741 43 21 22 33 0 8 0 amappl15 192 613 0 601 1 0 1 1 0 8 0 amappl14 184 32 0 28 1 0 1 1 0 8 0 amappl13 176 831 0 824 1 0 1 1 0 8 0 amappl12 168 6 0 3 1 0 1 1 0 8 0 amappl11 160 327 0 308 1 0 1 1 0 8 0 amappl10 152 258 0 252 1 0 1 1 0 8 0 amappl9 144 780 0 774 1 0 1 1 0 8 0 amappl8 136 673 0 588 3 0 3 3 0 8 0 amappl7 128 134 0 115 1 0 1 1 0 8 0 amappl6 120 493 0 479 2 1 1 2 0 8 0 amappl5 112 1855 0 1835 1 0 1 1 0 8 0 amappl4 104 1137 0 1110 2 1 1 2 0 8 0 amappl3 96 7249 0 7182 2 0 2 2 0 8 0 amappl2 88 1254 0 1211 5 4 1 2 0 8 0 amappl1 80 60200 0 59461 19 2 17 19 0 8 0 amappl 88 13853 0 13672 6 1 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 128 253 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 37 0 5 1 0 1 1 0 8 0 uaddrrnd 24 2375 0 2340 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2375 0 2340 1 0 1 1 0 8 0 vmmpekpl 168 21904 0 21842 4 0 4 4 0 8 0 vmmpepl 168 233719 0 230992 159 30 129 137 0 357 1 vmsppl 368 2374 0 2340 4 0 4 4 0 8 0 rwobjpl 56 63451 0 57265 89 1 88 88 0 8 0 pdppl 4096 4757 0 4680 159 78 81 95 0 8 4 pvpl 32 950750 0 932895 266 109 157 239 0 265 3 pmappl 248 2374 0 2340 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 952 0 117 24 0 24 24 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257b2ef) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000cd2748) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd80661693e0,fffffd807021e500,0,fffffd8069b96100) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff800029a3a2a0,3,ffff80002e4c7590,0,ffff80002e4c7680) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff800029a3a2a0,ffff80002e4c7638,ffff80002e4c7680) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002e4c7700) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4c7700) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x68f9b6b3850, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020dd8ff0) 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 x86_bus_space_io_write_1(3f8,0,6e) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:771 comcnputc(800,6e) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,6e) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(6e) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(6e) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064 db_printf(ffffffff8261b4d8) at db_printf+0x85 sys/kern/subr_prf.c:498 panic(ffffffff825a14be) at panic+0xd7 sys/kern/subr_prf.c:216 __assert(ffffffff82619d34,ffffffff826406ea,9b6,ffffffff825d59fb) at __assert+0x25 sys/kern/subr_prf.c:157 uvm_map_teardown(fffffd8070012460) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2488 uvmspace_free(fffffd8070012460) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 reaper(ffff800021232fc8) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: 1 ddb{1}> trace x86_ipi_db(ffff800020dd8ff0) 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 x86_bus_space_io_write_1(3f8,0,6e) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:771 comcnputc(800,6e) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,6e) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(6e) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(6e) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064 db_printf(ffffffff8261b4d8) at db_printf+0x85 sys/kern/subr_prf.c:498 panic(ffffffff825a14be) at panic+0xd7 sys/kern/subr_prf.c:216 __assert(ffffffff82619d34,ffffffff826406ea,9b6,ffffffff825d59fb) at __assert+0x25 sys/kern/subr_prf.c:157 uvm_map_teardown(fffffd8070012460) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2488 uvmspace_free(fffffd8070012460) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 reaper(ffff800021232fc8) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -14