panic: pool_do_get: mbufpl free list modified: page 0xfffffd806f27b000; item addr 0xfffffd806f27b500; offset 0x0=0x0 != 0x41f2430d5c10678f Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *345679 83332 0 0 0x4000000 1 syz-executor.0 479680 28209 0 0x2 0x4000000 0 syz-fuzzer db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8249df48) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff82921768,2,ffff800020eddf98) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff82921768,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_copym(fffffd806d583600,1368,4d0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d583600,1368,4d0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 ip6_fragment(fffffd806d583600,28,11,500) at ip6_fragment+0x33e sys/netinet6/ip6_output.c:829 ip6_output(fffffd806d583600,0,fffffd806f668760,0,0,fffffd806f6686f0) at ip6_output+0x1ba2 sys/netinet6/ip6_output.c:736 udp6_output(fffffd806f6686f0,fffffd806f281300,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236 sosend(fffffd8063d59980,0,ffff800020ede520,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020e0a878,f,ffff800020ede600,a,ffff800020ede6e0) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020e0a878,ffff800020ede698,ffff800020ede6e0) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff800020ede760) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ede760) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4c86b62c70, count: 2 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 pool_do_get: mbufpl free list modified: page 0xfffffd806f27b000; item addr 0xfffffd806f27b500; offset 0x0=0x0 != 0x41f2430d5c10678f ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8249df48) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff82921768,2,ffff800020eddf98) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff82921768,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_copym(fffffd806d583600,1368,4d0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d583600,1368,4d0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 ip6_fragment(fffffd806d583600,28,11,500) at ip6_fragment+0x33e sys/netinet6/ip6_output.c:829 ip6_output(fffffd806d583600,0,fffffd806f668760,0,0,fffffd806f6686f0) at ip6_output+0x1ba2 sys/netinet6/ip6_output.c:736 udp6_output(fffffd806f6686f0,fffffd806f281300,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236 sosend(fffffd8063d59980,0,ffff800020ede520,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020e0a878,f,ffff800020ede600,a,ffff800020ede6e0) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020e0a878,ffff800020ede698,ffff800020ede6e0) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff800020ede760) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ede760) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4c86b62c70, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020eddde0 rbx 0xffff800020edde90 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff8182a1bf kprintf+0x16f r9 0x1 r10 0x2 r11 0x8a00027251b36499 r12 0x3000000008 r13 0xffff800020edddf0 r14 0x100 r15 0x1 rip 0xffffffff8171d808 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020edddd0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=345679 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=67, nice=20 forw=0xffffffffffffffff, list=0xffff800020e09c48,0xffff800020e09028 process=0xffff800020df1750 user=0xffff800020ed9000, vmspace=0xfffffd806e9078a8 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 83332 219163 94836 0 2 0 syz-executor.0 *83332 345679 94836 0 7 0x4000000 syz-executor.0 83332 101391 94836 0 3 0x4000080 fsleep syz-executor.0 44774 42955 28209 0 3 0x82 piperd syz-executor.1 94836 63514 28209 0 2 0x482 syz-executor.0 28209 312846 11803 0 3 0x82 thrsleep syz-fuzzer 28209 520327 11803 0 3 0x4000082 nanosleep syz-fuzzer 28209 479680 11803 0 7 0x4000002 syz-fuzzer 28209 91038 11803 0 3 0x4000082 thrsleep syz-fuzzer 28209 269578 11803 0 3 0x4000082 thrsleep syz-fuzzer 28209 249159 11803 0 3 0x4000082 thrsleep syz-fuzzer 28209 76897 11803 0 3 0x4000082 thrsleep syz-fuzzer 28209 31259 11803 0 3 0x4000082 thrsleep syz-fuzzer 28209 468055 11803 0 3 0x4000082 kqread syz-fuzzer 11803 44163 59217 0 3 0x10008a pause ksh 59217 484016 49491 0 3 0x92 select sshd 55634 382693 1 0 3 0x100083 ttyin getty 49491 332859 1 0 3 0x80 select sshd 30173 402755 33001 74 3 0x100092 bpf pflogd 33001 303081 1 0 3 0x80 netio pflogd 15673 490919 80900 73 3 0x100090 kqread syslogd 80900 381614 1 0 3 0x100082 netio syslogd 59989 516658 1 77 3 0x100090 poll dhclient 69710 34470 1 0 3 0x80 poll dhclient 91055 215417 0 0 3 0x14200 bored smr 30981 459447 0 0 2 0x14200 zerothread 55540 148474 0 0 3 0x14200 aiodoned aiodoned 2067 400067 0 0 3 0x14200 syncer update 67114 392712 0 0 3 0x14200 cleaner cleaner 98707 229574 0 0 3 0x14200 reaper reaper 32347 306003 0 0 3 0x14200 pgdaemon pagedaemon 10705 98376 0 0 3 0x14200 bored crynlk 49572 183567 0 0 3 0x14200 bored crypto 61099 340294 0 0 3 0x40014200 acpi0 acpi0 75294 34986 0 0 3 0x40014200 idle1 58445 120979 0 0 3 0x14200 bored softnet 73997 253170 0 0 3 0x14200 bored systqmp 92468 270296 0 0 3 0x14200 bored systq 91494 447563 0 0 3 0x40014200 bored softclock 91276 196436 0 0 3 0x40014200 idle0 1 523185 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex mbufpl r = 0 (0xffffffff82921778) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:578 #4 m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] #4 m_copym+0x174 sys/kern/uipc_mbuf.c:667 #5 ip6_fragment+0x33e sys/netinet6/ip6_output.c:829 #6 ip6_output+0x1ba2 sys/netinet6/ip6_output.c:736 #7 udp6_output+0x36a sys/netinet6/udp6_output.c:236 #8 sosend+0x671 sys/kern/uipc_socket.c:555 #9 sendit+0x52b sys/kern/uipc_syscalls.c:657 #10 sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 #11 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #12 Xsyscall+0x128 Process 83332 (syz-executor.0) thread 0xffff800020e0a878 (345679) exclusive rwlock netlock r = 0 (0xffffffff827b8978) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 solock+0x5a sys/kern/uipc_socket2.c:282 #2 sosend+0x559 sys/kern/uipc_socket.c:543 #3 sendit+0x52b sys/kern/uipc_syscalls.c:657 #4 sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #6 Xsyscall+0x128 exclusive mutex mbufpl r = 0 (0xffffffff82921778) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:578 #4 m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] #4 m_copym+0x174 sys/kern/uipc_mbuf.c:667 #5 ip6_fragment+0x33e sys/netinet6/ip6_output.c:829 #6 ip6_output+0x1ba2 sys/netinet6/ip6_output.c:736 #7 udp6_output+0x36a sys/netinet6/udp6_output.c:236 #8 sosend+0x671 sys/kern/uipc_socket.c:555 #9 sendit+0x52b sys/kern/uipc_syscalls.c:657 #10 sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 #11 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #12 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9478 6400K 6723K 78643K 10763 0 pcb 13 8K 8K 78643K 37 0 rtable 109 4K 8K 78643K 265 0 ifaddr 53 12K 13K 78643K 72 0 counters 43 33K 34K 78643K 45 0 ioctlops 0 0K 4K 78643K 1495 0 iov 0 0K 16K 78643K 23 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1279 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 46 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 185 0 proc 61 63K 95K 78643K 446 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 26 0 in_multi 46 2K 2K 78643K 56 0 ether_multi 1 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 211 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 159 40K 56K 78643K 1528 0 UVM aobj 7 2K 2K 78643K 7 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 14 0 NDP 7 0K 0K 78643K 12 0 temp 80 3854K 3918K 78643K 2565 0 kqueue 3 4K 6K 78643K 5 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 arp 64 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 37 0 35 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 125 0 113 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 250 0 250 1 1 0 1 0 8 0 tcpcb 544 70 0 64 2 0 2 2 0 8 1 inpcb 296 420 0 407 2 0 2 2 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 2 0 2 1 0 1 1 0 482 1 pffrnode 88 2 0 2 1 0 1 1 0 8 1 pffrent 40 6 0 6 1 0 1 1 0 8 1 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 20 0 20 1 0 1 1 0 8 1 pfstitem 24 20 0 3 1 0 1 1 0 8 0 pfstkey 112 24 0 7 1 0 1 1 0 8 0 pfstate 328 22 0 5 2 0 2 2 0 8 0 pfrule 1360 23 0 19 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 189 0 0 12 0 12 12 0 8 0 art_table 32 190 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 36 0 26 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1609 0 203 88 0 88 88 0 8 0 ffsino 272 1609 0 203 94 0 94 94 0 8 0 nchpl 144 2043 0 438 60 0 60 60 0 8 0 uvmvnodes 72 1699 0 0 31 0 31 31 0 8 0 vnodes 208 1699 0 0 90 0 90 90 0 8 0 namei 1024 5447 0 5447 1 0 1 1 0 8 1 percpumem 16 33 0 1 1 0 1 1 0 8 0 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 560 3 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 6 0 6 1 0 1 1 0 8 1 scxspl 192 6243 0 6243 8 3 5 7 0 8 5 plimitpl 152 39 0 31 1 0 1 1 0 8 0 sigapl 424 400 0 369 4 0 4 4 0 8 0 futexpl 56 2426 0 2425 1 0 1 1 0 8 0 knotepl 112 66 0 46 1 0 1 1 0 8 0 kqueuepl 144 22 0 20 1 0 1 1 0 8 0 pipepl 304 88 0 77 2 0 2 2 0 8 1 fdescpl 496 385 0 369 3 0 3 3 0 8 0 filepl 152 2164 0 2053 5 0 5 5 0 8 0 lockfpl 104 33 0 32 1 0 1 1 0 8 0 lockfspl 48 14 0 13 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 28 0 17 1 0 1 1 0 8 0 ucredpl 96 208 0 199 1 0 1 1 0 8 0 zombiepl 144 369 0 369 1 0 1 1 0 8 1 processpl 992 400 0 369 5 0 5 5 0 8 1 procpl 624 722 0 681 4 0 4 4 0 8 0 sockpl 400 586 0 559 5 1 4 4 0 8 1 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 221 0 0 27 0 27 27 0 8 0 mtagpl 96 15 0 0 1 0 1 1 0 8 0 mbufpl 256 259 0 0 15 0 15 15 0 8 0 mbufpl: pool(0xffffffff82921768:mbufpl): free list modified: page 0xfffffd806f27b000; item ordinal 0; addr 0xfffffd806f27b500 (p 0xfffffd806f282000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd806f27b000; item ordinal 0; addr 0xfffffd806f27b500 (p 0xfffffd806f282000); offset 0x0=0x0 mbufpl: pool(0xffffffff82921768:mbufpl): page inconsistency: page 0xfffffd806f27b000; item ordinal 1; addr 0xacc70f110137ffe3 bufpl 280 3802 0 127 263 0 263 263 0 8 0 anonpl 16 52574 0 34268 77 1 76 76 0 124 2 amapchunkpl 152 2346 0 2076 26 1 25 25 0 158 13 amappl16 192 1637 0 754 46 0 46 46 0 8 1 amappl15 184 93 0 89 1 0 1 1 0 8 0 amappl14 176 1 0 0 1 0 1 1 0 8 0 amappl13 168 92 0 87 1 0 1 1 0 8 0 amappl12 160 86 0 81 1 0 1 1 0 8 0 amappl11 152 59 0 43 1 0 1 1 0 8 0 amappl10 144 16 0 14 1 0 1 1 0 8 0 amappl9 136 367 0 366 1 0 1 1 0 8 0 amappl8 128 354 0 313 2 0 2 2 0 8 0 amappl7 120 117 0 104 1 0 1 1 0 8 0 amappl6 112 33 0 27 1 0 1 1 0 8 0 amappl5 104 282 0 265 1 0 1 1 0 8 0 amappl4 96 490 0 462 1 0 1 1 0 8 0 amappl3 88 123 0 115 1 0 1 1 0 8 0 amappl2 80 2282 0 2211 2 0 2 2 0 8 0 amappl1 72 19715 0 19263 23 13 10 18 0 8 0 amappl 80 1007 0 932 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 388 0 369 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 388 0 369 1 0 1 1 0 8 0 vmmpekpl 168 6871 0 6835 2 0 2 2 0 8 0 vmmpepl 168 55776 0 53674 120 11 109 117 0 357 16 vmsppl 368 387 0 369 2 0 2 2 0 8 0 pdppl 4096 783 0 741 6 0 6 6 0 8 0 pvpl 32 180496 0 158937 187 0 187 187 0 265 12 pmappl 232 387 0 369 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 269 0 4 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82762ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 end of kernel end trace frame: 0xc000215628, count: 12 ddb{0}> trace x86_ipi_db(ffffffff82762ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 end of kernel end trace frame: 0xc000215628, count: -3 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:398 panic(ffffffff8249df48) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff82921768,2,ffff800020eddf98) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff82921768,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_copym(fffffd806d583600,1368,4d0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d583600,1368,4d0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 ip6_fragment(fffffd806d583600,28,11,500) at ip6_fragment+0x33e sys/netinet6/ip6_output.c:829 ip6_output(fffffd806d583600,0,fffffd806f668760,0,0,fffffd806f6686f0) at ip6_output+0x1ba2 sys/netinet6/ip6_output.c:736 udp6_output(fffffd806f6686f0,fffffd806f281300,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236 sosend(fffffd8063d59980,0,ffff800020ede520,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020e0a878,f,ffff800020ede600,a,ffff800020ede6e0) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020e0a878,ffff800020ede698,ffff800020ede6e0) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff800020ede760) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ede760) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4c86b62c70, count: 2 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8249df48) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff82921768,2,ffff800020eddf98) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff82921768,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_copym(fffffd806d583600,1368,4d0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d583600,1368,4d0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 ip6_fragment(fffffd806d583600,28,11,500) at ip6_fragment+0x33e sys/netinet6/ip6_output.c:829 ip6_output(fffffd806d583600,0,fffffd806f668760,0,0,fffffd806f6686f0) at ip6_output+0x1ba2 sys/netinet6/ip6_output.c:736 udp6_output(fffffd806f6686f0,fffffd806f281300,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236 sosend(fffffd8063d59980,0,ffff800020ede520,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020e0a878,f,ffff800020ede600,a,ffff800020ede6e0) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020e0a878,ffff800020ede698,ffff800020ede6e0) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff800020ede760) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ede760) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4c86b62c70, count: -13