panic: tpcanpi_co:ut kpeurt nelStopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *283475 17650 32767 0x10 0x4000000 1 syz-executor.6 222726 50397 0 0x14000 0x200 0 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(ffff800000bb9200) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd807c6063d0,fffffd80784dda00,0,fffffd8078466b00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002b056540,13,ffff80002e4cb810,4,ffff80002e4cb900) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002b056540,ffff80002e4cb8b8,ffff80002e4cb900) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002e4cb980) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4cb980) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3b407dd7b50, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic cpu0: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_map.c", line 2486 *cpu1: tcp_output ddb{1}> 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(ffff800000bb9200) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd807c6063d0,fffffd80784dda00,0,fffffd8078466b00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002b056540,13,ffff80002e4cb810,4,ffff80002e4cb900) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002b056540,ffff80002e4cb8b8,ffff80002e4cb900) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002e4cb980) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4cb980) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3b407dd7b50, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e4cb2f0 rbx 0xffff800020dd9b8f rdx 0xffff800000bfb800 rcx 0 rax 0xffff80002b056540 r8 0x101010101010101 r9 0x8080808080808080 r10 0xbe0adc3c9bc8e3ec r11 0xa4565bf8dcb4df09 r12 0xffff800020dd9990 r13 0 r14 0 r15 0x1 rip 0xffffffff81a16d08 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e4cb2e0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.6) pid=283475 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2008,0xffff800027bfb7c0 process=0xffff800027bed0b8 user=0xffff80002e4c6000, vmspace=0xfffffd80676e5468 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 72920 434899 36302 32767 2 0x10 syz-executor.5 50784 510070 21808 32767 2 0x10 syz-executor.4 50784 311537 21808 32767 3 0x4000090 fsleep syz-executor.4 17650 121531 91892 32767 2 0x10 syz-executor.6 *17650 283475 91892 32767 7 0x4000010 syz-executor.6 98427 383158 76648 32767 2 0x10 syz-executor.3 98427 161558 76648 32767 3 0x4000090 fsleep syz-executor.3 80250 395375 0 0 3 0x14200 bored sosplice 91892 260367 48019 32767 3 0x90 nanoslp syz-executor.6 48019 368775 70700 0 3 0x82 wait syz-executor.6 72746 189249 69848 32767 3 0x90 nanoslp syz-executor.7 69848 357459 70700 0 3 0x82 wait syz-executor.7 36302 194343 14669 32767 3 0x90 nanoslp syz-executor.5 21808 161551 79340 32767 3 0x90 nanoslp syz-executor.4 14669 227882 70700 0 3 0x82 wait syz-executor.5 79340 396466 70700 0 3 0x82 wait syz-executor.4 76648 38131 59473 32767 3 0x90 nanoslp syz-executor.3 59473 337373 70700 0 3 0x82 wait syz-executor.3 90708 163247 81745 32767 3 0x10 biowait syz-executor.2 93174 217437 6686 32767 3 0x90 nanoslp syz-executor.1 81745 469458 70700 0 3 0x82 wait syz-executor.2 6686 277406 70700 0 3 0x82 wait syz-executor.1 49795 10946 46406 32767 3 0x90 nanoslp syz-executor.0 46406 313942 70700 0 3 0x82 wait syz-executor.0 70700 290688 11921 0 3 0x82 kqread syz-fuzzer 70700 522285 11921 0 3 0x4000082 nanoslp syz-fuzzer 70700 466102 11921 0 3 0x4000082 wait syz-fuzzer 70700 491965 11921 0 3 0x4000082 wait syz-fuzzer 70700 205424 11921 0 3 0x4000082 thrsleep syz-fuzzer 70700 351060 11921 0 3 0x4000082 thrsleep syz-fuzzer 70700 382922 11921 0 3 0x4000082 wait syz-fuzzer 70700 393418 11921 0 3 0x4000082 wait syz-fuzzer 70700 176758 11921 0 3 0x4000082 thrsleep syz-fuzzer 70700 399140 11921 0 3 0x4000082 wait syz-fuzzer 70700 7375 11921 0 3 0x4000082 wait syz-fuzzer 70700 54646 11921 0 3 0x4000082 wait syz-fuzzer 70700 385733 11921 0 3 0x4000082 thrsleep syz-fuzzer 70700 257508 11921 0 3 0x4000082 wait syz-fuzzer 70700 123696 11921 0 3 0x4000082 nanoslp syz-fuzzer 70700 197760 11921 0 3 0x4000082 thrsleep syz-fuzzer 11921 279670 22182 0 3 0x10008a sigsusp ksh 22182 273110 48396 0 3 0x9a kqread sshd 20251 108459 1 0 3 0x100083 ttyin getty 48396 504152 1 0 3 0x88 kqread sshd 49891 16729 29530 73 3 0x1100090 kqread syslogd 29530 415158 1 0 3 0x100082 netio syslogd 7550 182560 1 0 3 0x100080 kqread resolvd 69370 55165 84046 77 3 0x100092 kqread dhcpleased 97754 403720 84046 77 3 0x100092 kqread dhcpleased 84046 375908 1 0 3 0x80 kqread dhcpleased 77591 174911 0 0 3 0x14200 bored smr 51336 207994 0 0 2 0x14200 zerothread 48522 88095 0 0 3 0x14200 aiodoned aiodoned 97045 90914 0 0 3 0x14200 syncer update 15699 141874 0 0 3 0x14200 cleaner cleaner 50397 222726 0 0 7 0x14200 reaper 80894 312090 0 0 3 0x14200 pgdaemon pagedaemon 5910 428576 0 0 3 0x14200 bored viomb 38891 492898 0 0 3 0x40014200 acpi0 acpi0 49827 231308 0 0 3 0x40014200 idle1 8317 355964 0 0 3 0x14200 bored softnet 37172 75370 0 0 3 0x14200 bored softnet 9855 120141 0 0 3 0x14200 bored softnet 17835 147325 0 0 3 0x14200 bored softnet 44093 394903 0 0 3 0x14200 bored systqmp 36551 296443 0 0 3 0x14200 bored systq 76629 327894 0 0 2 0x40014200 softclock 28458 276916 0 0 3 0x40014200 idle0 1 277656 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: 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 17650 (syz-executor.6) thread 0xffff80002b056540 (283475) 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 90708 (syz-executor.2) thread 0xffff8000ffff4fc0 (163247) exclusive rrwlock inode r = 0 (0xfffffd80689ae2c8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #10 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8067f595e8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412 #6 namei+0x36a sys/kern/vfs_lookup.c:244 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #8 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 Process 50397 (reaper) thread 0xffff800021233508 (222726) exclusive kernel: protection fault trap, code=0 Faulted in DDB; continuing... ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10199 6410K 6419K 78643K 11290 0 pcb 13 12K 14K 78643K 17 0 rtable 236 6K 7K 78643K 536 0 ifaddr 82 16K 16K 78643K 84 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 56 0 ioctlops 0 0K 2K 78643K 45 0 iov 0 0K 32K 78643K 133 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1270 79K 79K 78643K 1492 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 28 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 801 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 109K 78643K 1800 0 sigio 0 0K 0K 78643K 2 0 proc 56 78K 115K 78643K 551 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 323 0 in_multi 99 6K 6K 78643K 105 0 ether_multi 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 175 784K 784K 78643K 175 0 exec 0 0K 2K 78643K 695 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 274 84K 101K 78643K 12574 0 UVM aobj 118 7K 7K 78643K 120 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 53 0 NDP 11 0K 2K 78643K 27 0 temp 124 4726K 4854K 78643K 7449 0 kqueue 12 18K 28K 78643K 303 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 120 266 0 263 4 3 1 2 0 8 0 rtentry 112 114 0 3 4 0 4 4 0 8 0 unpcb 144 2787 0 2771 33 27 6 10 0 8 5 syncache 296 19 0 19 5 5 0 1 0 8 0 tcpqe 32 18 0 18 4 4 0 1 0 8 0 tcpcb 768 2373 0 2344 65 56 9 22 0 8 5 arp 120 18 0 0 1 0 1 1 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 6 0 6 1 1 0 1 0 8 0 inpcb 368 3327 0 3305 35 27 8 14 0 8 5 nd6 48 27 0 2 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 464 0 4 29 0 29 29 0 8 0 art_table 32 465 0 4 4 0 4 4 0 8 0 art_node 16 113 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 0 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 799 0 789 1 0 1 1 0 8 0 shmpl 112 117 0 2 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3686 0 2253 90 0 90 90 0 8 0 ffsino 272 3686 0 2253 96 0 96 96 0 8 0 nchpl 144 6193 0 4521 63 0 63 63 0 8 0 uvmvnodes 80 3799 0 0 78 0 78 78 0 8 0 vnodes 216 3799 0 0 212 0 212 212 0 8 0 namei 1024 20628 0 20627 2 1 1 2 0 8 0 percpumem 16 40 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 18900 0 18899 16 13 3 8 0 8 2 plimitpl 152 365 0 343 3 1 2 2 0 8 1 sigapl 424 2085 0 2031 7 0 7 7 0 8 0 futexpl 64 16562 0 16560 1 0 1 1 0 8 0 knotepl 120 559 0 0 17 0 17 17 0 8 0 kqueuepl 216 617 0 609 9 6 3 5 0 8 2 pipepl 320 422 0 394 11 8 3 6 0 8 0 fdescpl 496 2067 0 2034 7 2 5 6 0 8 0 filepl 152 15885 0 15633 45 30 15 22 0 8 5 lockfpl 104 295 0 293 1 0 1 1 0 8 0 lockfspl 48 70 0 68 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 171 0 155 1 0 1 1 0 8 0 ucredpl 104 1936 0 1918 1 0 1 1 0 8 0 zombiepl 144 2034 0 2031 1 0 1 1 0 8 0 processpl 1064 2085 0 2031 4 0 4 4 0 8 0 procpl 672 5581 0 5504 12 4 8 9 0 8 1 sosppl 168 18 0 16 2 1 1 1 0 8 0 sockpl 488 6440 0 6399 161 148 13 43 0 8 7 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 16 0 0 2 0 2 2 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 15 0 0 2 0 2 2 0 8 0 mcl4k 4096 10 0 0 2 0 2 2 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 353 0 0 44 1 43 44 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 689 0 0 40 0 40 40 0 8 0 bufpl 288 6660 0 330 453 0 453 453 0 8 0 anonpl 24 433962 0 421659 159 49 110 123 0 186 20 amapchunkpl 152 36029 0 35373 44 6 38 41 0 158 7 amappl16 200 7384 0 7016 62 39 23 38 0 8 0 amappl15 192 524 0 516 1 0 1 1 0 8 0 amappl14 184 461 0 452 1 0 1 1 0 8 0 amappl13 176 82 0 81 1 0 1 1 0 8 0 amappl12 168 13 0 10 1 0 1 1 0 8 0 amappl11 160 81 0 67 1 0 1 1 0 8 0 amappl10 152 633 0 628 1 0 1 1 0 8 0 amappl9 144 713 0 707 1 0 1 1 0 8 0 amappl8 136 832 0 758 3 0 3 3 0 8 0 amappl7 128 329 0 308 1 0 1 1 0 8 0 amappl6 120 417 0 403 2 1 1 2 0 8 0 amappl5 112 2183 0 2153 1 0 1 1 0 8 0 amappl4 104 1035 0 1008 2 1 1 2 0 8 0 amappl3 96 5840 0 5783 2 0 2 2 0 8 0 amappl2 88 522 0 490 2 1 1 2 0 8 0 amappl1 80 53871 0 53161 19 2 17 19 0 8 0 amappl 88 12032 0 11855 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 128 253 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 72 119 0 2 3 0 3 3 0 8 0 uaddrrnd 24 2067 0 2033 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2067 0 2033 1 0 1 1 0 8 0 vmmpekpl 168 20178 0 20119 3 0 3 3 0 8 0 vmmpepl 168 206079 0 203456 160 31 129 142 0 357 2 vmsppl 368 2066 0 2033 4 0 4 4 0 8 0 rwobjpl 56 58284 0 53014 78 2 76 76 0 8 0 pdppl 4096 4141 0 4066 133 52 81 87 0 8 6 pvpl 32 877948 0 860668 281 83 198 248 0 265 42 pmappl 248 2066 0 2033 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 940 0 83 25 0 25 25 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff829a0ff0) 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(3f8,0,6c) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:771 comcnputc(800,6c) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,6c) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(6c) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(6c) 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(fffffd80676e5b98) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2488 uvmspace_free(fffffd80676e5b98) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 reaper(ffff800021233508) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: 1 ddb{0}> trace x86_ipi_db(ffffffff829a0ff0) 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(3f8,0,6c) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:771 comcnputc(800,6c) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,6c) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(6c) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(6c) 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(fffffd80676e5b98) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2488 uvmspace_free(fffffd80676e5b98) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 reaper(ffff800021233508) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -14 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(ffffffff8257b2ef) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000bb9200) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd807c6063d0,fffffd80784dda00,0,fffffd8078466b00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002b056540,13,ffff80002e4cb810,4,ffff80002e4cb900) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002b056540,ffff80002e4cb8b8,ffff80002e4cb900) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002e4cb980) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4cb980) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3b407dd7b50, count: 6 ddb{1}> 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(ffff800000bb9200) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd807c6063d0,fffffd80784dda00,0,fffffd8078466b00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002b056540,13,ffff80002e4cb810,4,ffff80002e4cb900) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002b056540,ffff80002e4cb8b8,ffff80002e4cb900) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002e4cb980) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4cb980) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3b407dd7b50, count: -9