panic: tcp_output Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *403995 7775 32767 0x10 0x4000000 1 syz-executor.7 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257befc) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000d31c90) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd806704ab90,fffffd806768c600,0,fffffd806c8de100) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd806704ab90,0,ffff80002b25c160,0,fffffd806c8de100,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd806704ab90,0,ffff80002b25c160,0,fffffd806c8de100,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002e51e008,3,ffff80002b25c2e0,0,ffff80002b25c3d0) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002e51e008,ffff80002b25c388,ffff80002b25c3d0) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002b25c450) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002b25c450) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4380924350, 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 *cpu1: tcp_output ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257befc) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000d31c90) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd806704ab90,fffffd806768c600,0,fffffd806c8de100) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd806704ab90,0,ffff80002b25c160,0,fffffd806c8de100,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd806704ab90,0,ffff80002b25c160,0,fffffd806c8de100,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002e51e008,3,ffff80002b25c2e0,0,ffff80002b25c3d0) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002e51e008,ffff80002b25c388,ffff80002b25c3d0) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002b25c450) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002b25c450) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4380924350, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002b25bdc0 rbx 0xffff800020dd9b8f rdx 0 rcx 0 rax 0xffff80002e51e008 r8 0x101010101010101 r9 0x8080808080808080 r10 0x12295d7b9471530b r11 0x693027ee667dbf45 r12 0xffff800020dd9990 r13 0 r14 0 r15 0x1 rip 0xffffffff823fc058 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002b25bdb0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.7) pid=403995 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffeaa80,0xffff80002e51e558 process=0xffff8000fffec018 user=0xffff80002b257000, vmspace=0xfffffd80685fb188 estcpu=33, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 5516 71673 31957 32767 2 0x10 syz-executor.5 5516 15410 31957 32767 3 0x4000090 fsleep syz-executor.5 19051 210473 83207 32767 2 0x4081090 syz-executor.3 19051 513557 83207 32767 2 0x4081090 syz-executor.3 19051 434591 83207 32767 2 0x4081010 syz-executor.3 19051 99043 83207 32767 3 0x4003010 suspend syz-executor.3 47913 403137 98160 32767 2 0x10 syz-executor.0 84576 394158 27410 32767 3 0x90 nanoslp syz-executor.6 84576 143659 27410 32767 3 0x4000090 fsleep syz-executor.6 7775 91103 55525 32767 2 0x10 syz-executor.7 * 7775 403995 55525 32767 7 0x4000010 syz-executor.7 7775 410482 55525 32767 3 0x4000090 fsleep syz-executor.7 93605 189326 83069 32767 3 0x90 nanoslp syz-executor.4 93605 302215 83069 32767 3 0x4000090 netcon syz-executor.4 93605 343205 83069 32767 3 0x4000090 fsleep syz-executor.4 32031 126019 98952 32767 3 0x90 nanoslp syz-executor.1 98952 108680 57041 0 3 0x82 wait syz-executor.1 47414 481338 0 0 3 0x14200 bored sosplice 83207 221252 54618 32767 3 0x90 nanoslp syz-executor.3 55525 306184 61535 32767 3 0x90 nanoslp syz-executor.7 31957 473360 89726 32767 2 0x490 syz-executor.5 27410 31231 34513 32767 2 0x490 syz-executor.6 83069 366036 37334 32767 3 0x90 nanoslp syz-executor.4 89726 178013 57041 0 3 0x82 wait syz-executor.5 61535 223066 57041 0 3 0x82 wait syz-executor.7 34513 95196 57041 0 3 0x82 wait syz-executor.6 37334 238219 57041 0 3 0x82 wait syz-executor.4 13033 134561 56962 32767 3 0x90 piperd syz-executor.2 56962 347165 57041 0 3 0x82 wait syz-executor.2 54618 206860 57041 0 3 0x82 wait syz-executor.3 98160 64020 43055 32767 3 0x90 nanoslp syz-executor.0 43055 59560 57041 0 3 0x82 wait syz-executor.0 57041 370513 61720 0 3 0x82 wait syz-fuzzer 57041 371810 61720 0 3 0x4000082 thrsleep syz-fuzzer 57041 514314 61720 0 3 0x4000082 wait syz-fuzzer 57041 161345 61720 0 3 0x4000082 wait syz-fuzzer 57041 240888 61720 0 3 0x4000082 thrsleep syz-fuzzer 57041 454217 61720 0 3 0x4000082 thrsleep syz-fuzzer 57041 368032 61720 0 3 0x4000082 thrsleep syz-fuzzer 57041 132885 61720 0 3 0x4000082 wait syz-fuzzer 57041 509353 61720 0 3 0x4000082 thrsleep syz-fuzzer 57041 127073 61720 0 3 0x4000082 wait syz-fuzzer 57041 273941 61720 0 3 0x4000082 wait syz-fuzzer 57041 346929 61720 0 3 0x4000082 wait syz-fuzzer 57041 354023 61720 0 3 0x4000082 wait syz-fuzzer 57041 291379 61720 0 3 0x4000082 kqread syz-fuzzer 57041 170189 61720 0 3 0x4000082 thrsleep syz-fuzzer 57041 417951 61720 0 3 0x4000082 thrsleep syz-fuzzer 61720 398403 83708 0 3 0x10008a sigsusp ksh 83708 113681 92968 0 3 0x9a kqread sshd 7804 279451 1 0 3 0x100083 ttyin getty 92968 152030 1 0 3 0x88 kqread sshd 60869 107054 21440 73 3 0x1100090 kqread syslogd 21440 170008 1 0 3 0x100082 netio syslogd 67101 432471 1 0 3 0x100080 kqread resolvd 85695 408456 14605 77 3 0x100092 kqread dhcpleased 6575 207643 14605 77 3 0x100092 kqread dhcpleased 14605 461872 1 0 3 0x80 kqread dhcpleased 70962 302343 0 0 3 0x14200 bored smr 88064 212287 0 0 2 0x14200 zerothread 1058 258789 0 0 3 0x14200 aiodoned aiodoned 47267 158479 0 0 3 0x14200 syncer update 25155 274041 0 0 3 0x14200 cleaner cleaner 85290 164948 0 0 3 0x14200 reaper reaper 28339 381459 0 0 3 0x14200 pgdaemon pagedaemon 42543 358084 0 0 3 0x14200 bored viomb 86265 158318 0 0 3 0x40014200 acpi0 acpi0 49438 177314 0 0 3 0x40014200 idle1 85229 437390 0 0 3 0x14200 bored softnet 24207 19683 0 0 3 0x14200 bored softnet 6467 432100 0 0 3 0x14200 bored softnet 26356 178454 0 0 3 0x14200 bored softnet 11119 193799 0 0 3 0x14200 bored systqmp 96059 345696 0 0 3 0x14200 bored systq 36461 328079 0 0 3 0x40014200 bored softclock 14284 73314 0 0 3 0x40014200 idle0 1 134617 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 7775 (syz-executor.7) thread 0xffff80002e51e008 (403995) exclusive rwlock netlock r = 0 (0xffffffff8292fbb0) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10210 6412K 6419K 78643K 11305 0 pcb 13 12K 14K 78643K 17 0 rtable 242 6K 7K 78643K 703 0 ifaddr 82 16K 16K 78643K 91 0 sysctl 2 0K 2K 78643K 69 0 counters 56 35K 35K 78643K 58 0 ioctlops 0 0K 2K 78643K 264 0 iov 0 0K 24K 78643K 944 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 2817 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 98 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1510 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 24 89K 121K 78643K 5740 0 sigio 0 0K 0K 78643K 24 0 proc 56 78K 115K 78643K 806 0 subproc 104 6K 6K 78643K 117 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 550 0 in_multi 99 6K 7K 78643K 171 0 ether_multi 1 0K 0K 78643K 28 0 mrt 2 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 2K 78643K 1762 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 327 88K 100K 78643K 35820 0 UVM aobj 131 4K 4K 78643K 136 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 2 0K 0K 78643K 101 0 NDP 11 0K 2K 78643K 30 0 temp 124 4726K 4791K 78643K 16606 0 kqueue 12 18K 32K 78643K 611 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 120 604 0 601 6 5 1 3 0 8 0 rtentry 112 126 0 12 4 0 4 4 0 8 0 unpcb 144 4031 0 4018 29 26 3 10 0 8 2 syncache 296 74 0 74 11 11 0 1 0 8 0 tcpqe 32 25 0 25 7 7 0 1 0 8 0 tcpcb 768 7326 0 7307 153 141 12 37 0 8 7 arp 120 21 0 2 1 0 1 1 0 8 0 ipq 40 71 0 69 3 2 1 1 0 8 0 ipqe 40 148 0 146 3 2 1 1 0 8 0 inpcb 368 9815 0 9795 110 100 10 17 0 8 8 nd6 48 30 0 3 1 0 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 503 0 44 29 0 29 29 0 8 0 art_table 32 504 0 44 4 0 4 4 0 8 0 art_node 16 125 0 21 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 112 1508 0 1498 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 9500 0 8055 91 0 91 91 0 8 0 ffsino 272 9500 0 8055 97 0 97 97 0 8 0 nchpl 144 17118 0 15482 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 57894 0 57894 2 1 1 2 0 8 1 percpumem 16 41 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 45392 0 45392 20 17 3 8 0 8 3 plimitpl 152 1342 0 1319 3 2 1 2 0 8 0 sigapl 424 6026 0 5972 7 0 7 7 0 8 0 futexpl 64 50127 0 50121 1 0 1 1 0 8 0 knotepl 120 749 0 0 18 1 17 17 0 8 0 kqueuepl 216 1593 0 1584 26 25 1 8 0 8 0 pipepl 320 1576 0 1548 39 36 3 8 0 8 0 fdescpl 496 6008 0 5973 7 1 6 6 0 8 0 filepl 152 44987 0 44749 64 49 15 19 0 8 3 lockfpl 104 785 0 783 2 1 1 2 0 8 0 lockfspl 48 201 0 199 1 0 1 1 0 8 0 sessionpl 144 24 0 8 1 0 1 1 0 8 0 pgrppl 48 113 0 97 1 0 1 1 0 8 0 ucredpl 104 9520 0 9502 1 0 1 1 0 8 0 zombiepl 144 5973 0 5972 1 0 1 1 0 8 0 processpl 1064 6026 0 5972 5 1 4 5 0 8 0 procpl 672 17098 0 17019 17 8 9 9 0 8 1 sosppl 168 96 0 95 10 9 1 1 0 8 0 sockpl 488 14700 0 14664 257 243 14 34 0 8 8 mcl64k 65536 25 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 19 0 0 2 0 2 2 0 8 0 mcl9k 9216 11 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 3 0 3 3 0 8 0 mcl4k 4096 50 0 0 5 2 3 5 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 354 0 0 34 1 33 34 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 816 0 0 39 0 39 39 0 8 0 bufpl 288 11604 0 5274 453 0 453 453 0 8 0 anonpl 24 1208391 0 1195304 160 65 95 106 0 186 0 amapchunkpl 152 102367 0 101726 56 28 28 38 0 158 2 amappl16 200 19853 0 19452 94 71 23 34 0 8 0 amappl15 192 1436 0 1429 1 0 1 1 0 8 0 amappl14 184 2134 0 2121 2 1 1 1 0 8 0 amappl13 176 778 0 775 1 0 1 1 0 8 0 amappl12 168 716 0 710 2 1 1 1 0 8 0 amappl11 160 82 0 67 1 0 1 1 0 8 0 amappl10 152 35 0 29 1 0 1 1 0 8 0 amappl9 144 2355 0 2347 1 0 1 1 0 8 0 amappl8 136 1143 0 1017 5 0 5 5 0 8 0 amappl7 128 475 0 451 1 0 1 1 0 8 0 amappl6 120 2071 0 2050 2 0 2 2 0 8 0 amappl5 112 3713 0 3696 1 0 1 1 0 8 0 amappl4 104 2329 0 2297 2 1 1 2 0 8 0 amappl3 96 18671 0 18609 2 0 2 2 0 8 0 amappl2 88 2076 0 2035 2 1 1 2 0 8 0 amappl1 80 151515 0 150789 21 4 17 19 0 8 1 amappl 88 35010 0 34827 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 72 135 0 5 3 0 3 3 0 8 0 uaddrrnd 24 6008 0 5973 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6008 0 5973 1 0 1 1 0 8 0 vmmpekpl 168 53343 0 53279 4 0 4 4 0 8 0 vmmpepl 168 592360 0 589527 182 45 137 142 0 357 6 vmsppl 368 6007 0 5973 4 0 4 4 0 8 0 rwobjpl 56 155406 0 147891 113 3 110 110 0 8 0 pdppl 4096 12023 0 11946 181 100 81 93 0 8 4 pvpl 32 2284814 0 2266569 304 135 169 241 0 265 2 pmappl 248 6007 0 5973 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1061 0 206 25 0 25 25 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82933ff0) 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 witness_checkorder(ffffffff82a07c48,9,0) at witness_checkorder+0x65 sys/kern/subr_witness.c:765 __mp_lock(ffffffff82a07a40) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82a07a40) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82a07a40) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 __mp_acquire_count(ffffffff82a07a40,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 tsleep(ffff8000fffeccb0,20,ffffffff825d94d9,0) at tsleep+0x179 exit1(ffff80002e51f268,0,0,3) at exit1+0x231 sys/kern/kern_exit.c:164 single_thread_check_locked(ffff80002e51f268,0,0) at single_thread_check_locked+0x227 sys/kern/kern_sig.c:2016 userret(ffff80002e51f268) at userret+0x236 single_thread_check sys/kern/kern_sig.c:2054 [inline] userret(ffff80002e51f268) at userret+0x236 sys/kern/kern_sig.c:2004 syscall(ffff80002e485fe0) at syscall+0x57e mi_syscall_return sys/sys/syscall_mi.h:128 [inline] syscall(ffff80002e485fe0) at syscall+0x57e sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc53c0, count: 3 ddb{0}> trace x86_ipi_db(ffffffff82933ff0) 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 witness_checkorder(ffffffff82a07c48,9,0) at witness_checkorder+0x65 sys/kern/subr_witness.c:765 __mp_lock(ffffffff82a07a40) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82a07a40) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82a07a40) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 __mp_acquire_count(ffffffff82a07a40,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 tsleep(ffff8000fffeccb0,20,ffffffff825d94d9,0) at tsleep+0x179 exit1(ffff80002e51f268,0,0,3) at exit1+0x231 sys/kern/kern_exit.c:164 single_thread_check_locked(ffff80002e51f268,0,0) at single_thread_check_locked+0x227 sys/kern/kern_sig.c:2016 userret(ffff80002e51f268) at userret+0x236 single_thread_check sys/kern/kern_sig.c:2054 [inline] userret(ffff80002e51f268) at userret+0x236 sys/kern/kern_sig.c:2004 syscall(ffff80002e485fe0) at syscall+0x57e mi_syscall_return sys/sys/syscall_mi.h:128 [inline] syscall(ffff80002e485fe0) at syscall+0x57e sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc53c0, count: -12 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(ffffffff8257befc) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000d31c90) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd806704ab90,fffffd806768c600,0,fffffd806c8de100) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd806704ab90,0,ffff80002b25c160,0,fffffd806c8de100,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd806704ab90,0,ffff80002b25c160,0,fffffd806c8de100,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002e51e008,3,ffff80002b25c2e0,0,ffff80002b25c3d0) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002e51e008,ffff80002b25c388,ffff80002b25c3d0) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002b25c450) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002b25c450) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4380924350, count: 6 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257befc) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000d31c90) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd806704ab90,fffffd806768c600,0,fffffd806c8de100) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd806704ab90,0,ffff80002b25c160,0,fffffd806c8de100,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd806704ab90,0,ffff80002b25c160,0,fffffd806c8de100,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002e51e008,3,ffff80002b25c2e0,0,ffff80002b25c3d0) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002e51e008,ffff80002b25c388,ffff80002b25c3d0) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002b25c450) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002b25c450) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4380924350, count: -9