panic:p a n ticcp:_keournteplut diStopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *417352 81463 32767 0x10 0x4000000 0 syz-executor.1 364692 50648 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(ffff800000bb9800) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd805b1e0d58,fffffd806a9da800,0,fffffd806a1ebf00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd805b1e0d58,0,ffff80002ae83510,0,fffffd806a1ebf00,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd805b1e0d58,0,ffff80002ae83510,0,fffffd806a1ebf00,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002ca75260,3,ffff80002ae83690,0,ffff80002ae83780) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002ca75260,ffff80002ae83738,ffff80002ae83780) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002ae83800) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002ae83800) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3dbb754f240, 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(ffff800000bb9800) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd805b1e0d58,fffffd806a9da800,0,fffffd806a1ebf00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd805b1e0d58,0,ffff80002ae83510,0,fffffd806a1ebf00,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd805b1e0d58,0,ffff80002ae83510,0,fffffd806a1ebf00,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002ca75260,3,ffff80002ae83690,0,ffff80002ae83780) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002ca75260,ffff80002ae83738,ffff80002ae83780) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002ae83800) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002ae83800) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3dbb754f240, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002ae83170 rbx 0xffffffff829a1b8f cpu_info_full_primary+0x2b8f rdx 0 rcx 0 rax 0xffff80002ca75260 r8 0x101010101010101 r9 0x8080808080808080 r10 0xae3d6d9363db7748 r11 0x194a21cef79128a0 r12 0xffffffff829a1990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff81a16d08 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002ae83160 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=417352 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff80002ca75ce0,0xffff80002ca742b0 process=0xffff8000ffff9d20 user=0xffff80002ae7e000, vmspace=0xfffffd807345c740 estcpu=32, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 28141 492975 62367 32767 2 0x10 syz-executor.3 21025 309747 30791 32767 2 0x10 syz-executor.7 21025 193899 30791 32767 3 0x4000090 netio syz-executor.7 21025 502396 30791 32767 3 0x4000090 fsleep syz-executor.7 71382 23174 36590 32767 3 0x90 nanoslp syz-executor.6 71382 174853 36590 32767 3 0x4000090 fsleep syz-executor.6 71382 325091 36590 32767 3 0x4000090 fsleep syz-executor.6 71382 391409 36590 32767 3 0x4000090 fsleep syz-executor.6 81790 362688 1819 32767 2 0x10 syz-executor.5 81790 469086 1819 32767 3 0x4000090 fsleep syz-executor.5 81790 194268 1819 32767 3 0x4000090 fsleep syz-executor.5 73960 284765 82231 32767 2 0x10 syz-executor.4 73960 252495 82231 32767 3 0x4000090 fsleep syz-executor.4 81463 79032 25074 32767 2 0x10 syz-executor.1 *81463 417352 25074 32767 7 0x4000010 syz-executor.1 81463 410466 25074 32767 3 0x4000090 fsleep syz-executor.1 81463 208397 25074 32767 3 0x4000090 fsleep syz-executor.1 5827 482041 58085 32767 3 0x90 nanoslp syz-executor.0 58085 223481 37194 0 3 0x82 wait syz-executor.0 25074 462703 21511 32767 3 0x90 nanoslp syz-executor.1 21511 198809 37194 0 3 0x82 wait syz-executor.1 1819 128191 60484 32767 3 0x90 nanoslp syz-executor.5 60484 59891 37194 0 3 0x82 wait syz-executor.5 32966 451619 0 0 3 0x14200 bored sosplice 82231 393491 77438 32767 3 0x90 nanoslp syz-executor.4 77438 319076 37194 0 3 0x82 wait syz-executor.4 30791 19649 61433 32767 3 0x90 nanoslp syz-executor.7 61433 339662 37194 0 3 0x82 wait syz-executor.7 62367 237742 42987 32767 3 0x90 nanoslp syz-executor.3 36590 261887 65218 32767 3 0x90 nanoslp syz-executor.6 42987 354893 37194 0 3 0x82 wait syz-executor.3 65218 365286 37194 0 3 0x82 wait syz-executor.6 44278 464631 28874 32767 3 0x90 nanoslp syz-executor.2 28874 27380 37194 0 3 0x82 wait syz-executor.2 37194 347635 94539 0 3 0x82 wait syz-fuzzer 37194 70342 94539 0 3 0x4000082 nanoslp syz-fuzzer 37194 130343 94539 0 3 0x4000082 thrsleep syz-fuzzer 37194 416573 94539 0 3 0x4000082 wait syz-fuzzer 37194 364626 94539 0 3 0x4000082 wait syz-fuzzer 37194 431207 94539 0 3 0x4000082 thrsleep syz-fuzzer 37194 397992 94539 0 3 0x4000082 wait syz-fuzzer 37194 428878 94539 0 3 0x4000082 thrsleep syz-fuzzer 37194 440916 94539 0 3 0x4000082 thrsleep syz-fuzzer 37194 51541 94539 0 3 0x4000082 wait syz-fuzzer 37194 329833 94539 0 3 0x4000082 wait syz-fuzzer 37194 472178 94539 0 3 0x4000082 wait syz-fuzzer 37194 332625 94539 0 3 0x4000082 nanoslp syz-fuzzer 37194 143554 94539 0 3 0x4000082 kqread syz-fuzzer 37194 72021 94539 0 3 0x4000082 thrsleep syz-fuzzer 37194 83793 94539 0 3 0x4000082 wait syz-fuzzer 94539 23760 47930 0 3 0x10008a sigsusp ksh 47930 387895 87937 0 3 0x9a kqread sshd 4168 90704 1 0 3 0x100083 ttyin getty 87937 349492 1 0 3 0x88 kqread sshd 40910 80536 58253 73 3 0x1100090 kqread syslogd 58253 447221 1 0 3 0x100082 netio syslogd 42679 94853 1 0 3 0x100080 kqread resolvd 50864 291025 23579 77 3 0x100092 kqread dhcpleased 83142 44491 23579 77 3 0x100092 kqread dhcpleased 23579 191886 1 0 3 0x80 kqread dhcpleased 71501 433188 0 0 3 0x14200 bored smr 12233 148812 0 0 2 0x14200 zerothread 30754 221293 0 0 3 0x14200 aiodoned aiodoned 68149 430872 0 0 3 0x14200 syncer update 67549 323575 0 0 3 0x14200 cleaner cleaner 50648 364692 0 0 7 0x14200 reaper 60268 372234 0 0 3 0x14200 pgdaemon pagedaemon 97603 464768 0 0 3 0x14200 bored viomb 96831 522952 0 0 3 0x40014200 acpi0 acpi0 38383 176952 0 0 3 0x40014200 idle1 88252 124422 0 0 3 0x14200 bored softnet 60623 286412 0 0 3 0x14200 bored softnet 19012 443716 0 0 3 0x14200 bored softnet 20301 692 0 0 3 0x14200 bored softnet 7863 220449 0 0 3 0x14200 bored systqmp 95042 41490 0 0 3 0x14200 bored systq 4689 158665 0 0 3 0x40014200 bored softclock 90126 314736 0 0 3 0x40014200 idle0 1 323025 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: 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_freepageq+0xcc sys/uvm/uvm_pmemrange.c:1333 #4 amap_wipeout+0x1ff sys/uvm/uvm_amap.c:523 #5 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1351 #6 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2541 #7 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 #8 reaper+0x19a sys/kern/kern_exit.c:448 #9 proc_trampoline+0x1c Process 81463 (syz-executor.1) thread 0xffff80002ca75260 (417352) 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 Process 50648 (reaper) thread 0xffff800021233a48 (364692) exclusive kernel: protection fault trap, code=0 Faulted in DDB; continuing... ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10198 6410K 6419K 78643K 11304 0 pcb 13 12K 14K 78643K 17 0 rtable 240 6K 7K 78643K 1116 0 ifaddr 82 17K 17K 78643K 121 0 sysctl 2 0K 1K 78643K 7 0 counters 56 35K 35K 78643K 66 0 ioctlops 0 0K 2K 78643K 96 0 iov 0 0K 32K 78643K 1162 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 2196 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 84 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1423 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 24 89K 125K 78643K 5311 0 sigio 0 0K 0K 78643K 32 0 proc 56 78K 115K 78643K 984 0 subproc 104 6K 6K 78643K 169 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 355 0 in_multi 99 6K 6K 78643K 216 0 ether_multi 1 0K 0K 78643K 13 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 169 758K 758K 78643K 169 0 exec 0 0K 2K 78643K 1157 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 338 91K 106K 78643K 33791 0 UVM aobj 131 4K 4K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 1 0K 0K 78643K 222 0 NDP 11 0K 2K 78643K 42 0 temp 124 4726K 4790K 78643K 15590 0 kqueue 12 18K 24K 78643K 452 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 120 534 0 530 7 6 1 3 0 8 0 rtentry 112 175 0 62 4 0 4 4 0 8 0 unpcb 144 4347 0 4330 36 32 4 6 0 8 3 syncache 296 53 0 53 8 7 1 1 0 8 1 tcpqe 32 13 0 13 7 6 1 1 0 8 1 tcpcb 768 2241 0 2236 87 84 3 16 0 8 2 arp 120 28 0 10 1 0 1 1 0 8 0 ipq 40 13 0 11 3 2 1 1 0 8 0 ipqe 40 50 0 48 3 2 1 1 0 8 0 inpcb 368 4649 0 4640 88 86 2 14 0 8 1 nd6 48 48 0 21 1 0 1 1 0 8 0 kcovpl 48 13 0 5 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 702 0 241 31 2 29 30 0 8 0 art_table 32 703 0 241 4 0 4 4 0 8 0 art_node 16 174 0 71 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 1421 0 1411 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 9408 0 7969 91 0 91 91 0 8 0 ffsino 272 9408 0 7969 97 0 97 97 0 8 0 nchpl 144 17474 0 15832 63 0 63 63 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 60599 0 60599 4 3 1 2 0 8 1 percpumem 16 45 0 5 1 0 1 1 0 8 0 kstatmem 264 32 0 10 2 0 2 2 0 8 0 scxspl 216 56025 0 56025 14 13 1 5 0 8 1 plimitpl 152 1612 0 1589 8 7 1 2 0 8 0 sigapl 424 5577 0 5522 7 0 7 7 0 8 0 futexpl 64 49102 0 49093 6 5 1 1 0 8 0 knotepl 120 566 0 0 11 0 11 11 0 8 0 kqueuepl 216 1837 0 1829 36 28 8 8 0 8 7 pipepl 320 1566 0 1538 35 32 3 13 0 8 0 fdescpl 496 5559 0 5524 7 2 5 6 0 8 0 filepl 152 41556 0 41316 77 62 15 20 0 8 4 lockfpl 104 775 0 773 3 2 1 2 0 8 0 lockfspl 48 194 0 192 1 0 1 1 0 8 0 sessionpl 144 28 0 12 1 0 1 1 0 8 0 pgrppl 48 50 0 34 1 0 1 1 0 8 0 ucredpl 104 6196 0 6178 1 0 1 1 0 8 0 zombiepl 144 5524 0 5522 1 0 1 1 0 8 0 processpl 1064 5577 0 5522 5 1 4 5 0 8 0 procpl 672 16225 0 16143 13 5 8 9 0 8 0 sosppl 168 100 0 100 10 10 0 1 0 8 0 sockpl 488 9679 0 9649 221 210 11 24 0 8 7 mcl64k 65536 27 0 0 4 1 3 3 0 8 0 mcl16k 16384 25 0 0 4 1 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 16 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 28 0 0 3 1 2 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 340 0 0 38 5 33 38 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 606 0 0 25 0 25 25 0 8 0 bufpl 288 11572 0 5242 453 0 453 453 0 8 0 anonpl 24 1145026 0 1132223 157 58 99 107 0 186 1 amapchunkpl 152 102452 0 101774 85 45 40 41 0 158 11 amappl16 200 17081 0 16713 111 83 28 33 0 8 8 amappl15 192 1601 0 1592 1 0 1 1 0 8 0 amappl14 184 567 0 558 1 0 1 1 0 8 0 amappl13 176 112 0 111 1 0 1 1 0 8 0 amappl12 168 17 0 14 1 0 1 1 0 8 0 amappl11 160 716 0 698 1 0 1 1 0 8 0 amappl10 152 1326 0 1316 1 0 1 1 0 8 0 amappl9 144 1141 0 1135 1 0 1 1 0 8 0 amappl8 136 1487 0 1370 5 0 5 5 0 8 0 amappl7 128 814 0 791 1 0 1 1 0 8 0 amappl6 120 886 0 866 2 1 1 2 0 8 0 amappl5 112 6522 0 6492 1 0 1 1 0 8 0 amappl4 104 1760 0 1734 2 0 2 2 0 8 0 amappl3 96 16843 0 16783 2 0 2 2 0 8 0 amappl2 88 690 0 657 2 1 1 2 0 8 0 amappl1 80 140845 0 140101 22 5 17 19 0 8 0 amappl 88 32969 0 32779 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 5559 0 5523 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5559 0 5523 1 0 1 1 0 8 0 vmmpekpl 168 49674 0 49609 4 0 4 4 0 8 0 vmmpepl 168 554117 0 551254 203 72 131 142 0 357 0 vmsppl 368 5558 0 5523 4 0 4 4 0 8 0 rwobjpl 56 144986 0 137495 114 6 108 110 0 8 0 pdppl 4096 11125 0 11046 236 155 81 95 0 8 2 pvpl 32 2247005 0 2228925 395 226 169 255 0 265 9 pmappl 248 5558 0 5523 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1088 0 256 25 0 25 25 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(ffff800000bb9800) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd805b1e0d58,fffffd806a9da800,0,fffffd806a1ebf00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd805b1e0d58,0,ffff80002ae83510,0,fffffd806a1ebf00,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd805b1e0d58,0,ffff80002ae83510,0,fffffd806a1ebf00,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002ca75260,3,ffff80002ae83690,0,ffff80002ae83780) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002ca75260,ffff80002ae83738,ffff80002ae83780) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002ae83800) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002ae83800) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3dbb754f240, 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x28 sys/arch/amd64/amd64/bus_space.c:651 comcnputc(800,61) at comcnputc+0x97 sys/dev/ic/com.c:1259 cnputc(61) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(61) 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(fffffd807345c8b0) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2488 uvmspace_free(fffffd807345c8b0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 reaper(ffff800021233a48) 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x28 sys/arch/amd64/amd64/bus_space.c:651 comcnputc(800,61) at comcnputc+0x97 sys/dev/ic/com.c:1259 cnputc(61) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(61) 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(fffffd807345c8b0) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2488 uvmspace_free(fffffd807345c8b0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 reaper(ffff800021233a48) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -14