panic(ffffffff823fffef) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff8292cbb0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff8292cbb0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff8292cbb0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd806d7d2500,db74,5a0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d7d2500,db74,5a0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 ip_fragment(fffffd806d7d2500,ffff80000017b2a8,5b4) at ip_fragment+0x324 ip_output(fffffd806d7d2500,0,fffffd806f6849b0,0,0,fffffd806f684940) at ip_output+0xfd7 sys/netinet/ip_output.c:499 udp_output(fffffd806f684940,fffffd806d7d2500,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017 sosend(fffffd80643397f0,0,ffff800020ed2740,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020e09768,6,ffff800020ed2820,0,ffff800020ed2900) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020e09768,ffff800020ed28b8,ffff800020ed2900) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff800020ed2980) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ed2980) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe630f38c470, 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_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806a581d00+16 0x0!=0xe2f0f292ff2d6ce5 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823fffef) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff8292cbb0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff8292cbb0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff8292cbb0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd806d7d2500,db74,5a0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d7d2500,db74,5a0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 ip_fragment(fffffd806d7d2500,ffff80000017b2a8,5b4) at ip_fragment+0x324 ip_output(fffffd806d7d2500,0,fffffd806f6849b0,0,0,fffffd806f684940) at ip_output+0xfd7 sys/netinet/ip_output.c:499 udp_output(fffffd806f684940,fffffd806d7d2500,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017 sosend(fffffd80643397f0,0,ffff800020ed2740,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020e09768,6,ffff800020ed2820,0,ffff800020ed2900) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020e09768,ffff800020ed28b8,ffff800020ed2900) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff800020ed2980) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ed2980) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe630f38c470, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020ed2150 rbx 0xffff800020ed2200 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff821f795f kprintf+0x16f r9 0x1 r10 0x2 r11 0x33d98509c092957f r12 0x3000000008 r13 0xffff800020ed2160 r14 0x100 r15 0x1 rip 0xffffffff81a0af38 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020ed2140 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=483043 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=56, nice=20 forw=0xffffffffffffffff, list=0xffff800020e09288,0xffffffff828c27a0 process=0xffff800020e9b768 user=0xffff800020ecd000, vmspace=0xfffffd807efffa10 estcpu=12, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 72072 47113 55194 0 2 0 syz-executor.1 *72072 483043 55194 0 7 0x4000000 syz-executor.1 83267 107606 0 0 3 0x14200 bored sosplice 55194 431327 36872 0 3 0x82 nanosleep syz-executor.1 82634 147823 36872 0 3 0x82 nanosleep syz-executor.0 36872 74729 44327 0 3 0x82 thrsleep syz-fuzzer 36872 351589 44327 0 7 0x4000482 syz-fuzzer 36872 471599 44327 0 2 0x4000482 syz-fuzzer 36872 132148 44327 0 3 0x4000082 thrsleep syz-fuzzer 36872 41413 44327 0 3 0x4000082 kqread syz-fuzzer 36872 281899 44327 0 3 0x4000082 thrsleep syz-fuzzer 36872 307197 44327 0 3 0x4000082 thrsleep syz-fuzzer 36872 212317 44327 0 3 0x4000082 thrsleep syz-fuzzer 36872 80402 44327 0 3 0x4000082 thrsleep syz-fuzzer 36872 35280 44327 0 3 0x4000082 thrsleep syz-fuzzer 44327 497504 24674 0 3 0x10008a pause ksh 24674 57973 95207 0 3 0x92 select sshd 71462 182444 1 0 3 0x100083 ttyin getty 95207 329685 1 0 3 0x80 select sshd 49503 373023 85764 74 3 0x100092 bpf pflogd 85764 336354 1 0 3 0x80 netio pflogd 46494 229621 53711 73 3 0x100090 kqread syslogd 53711 382951 1 0 3 0x100082 netio syslogd 16331 487766 1 77 3 0x100090 poll dhclient 90166 166106 1 0 3 0x80 poll dhclient 94982 90540 0 0 3 0x14200 bored smr 98313 282544 0 0 2 0x14200 zerothread 15378 257350 0 0 3 0x14200 aiodoned aiodoned 19728 449921 0 0 3 0x14200 syncer update 18998 204466 0 0 3 0x14200 cleaner cleaner 14071 156279 0 0 3 0x14200 reaper reaper 16241 243392 0 0 3 0x14200 pgdaemon pagedaemon 42415 287297 0 0 3 0x14200 bored crynlk 8124 64215 0 0 3 0x14200 bored crypto 58640 202661 0 0 3 0x40014200 acpi0 acpi0 56253 123302 0 0 3 0x40014200 idle1 33131 217914 0 0 3 0x14200 bored softnet 27140 449209 0 0 3 0x14200 bored systqmp 77980 309652 0 0 3 0x14200 bored systq 59589 367937 0 0 3 0x40014200 bored softclock 2631 425312 0 0 3 0x40014200 idle0 1 490400 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 72072 (syz-executor.1) thread 0xffff800020e09768 (483043) exclusive rwlock netlock r = 0 (0xffffffff8270c198) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9498 6408K 6668K 78643K 10747 0 pcb 13 8K 8K 78643K 131 0 rtable 116 4K 7K 78643K 385 0 ifaddr 59 12K 14K 78643K 112 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 49 0 ioctlops 0 0K 4K 78643K 1508 0 iov 0 0K 16K 78643K 22 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1286 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 50 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 174 0 sigio 0 0K 0K 78643K 6 0 proc 61 63K 95K 78643K 451 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 11 0 in_multi 37 2K 2K 78643K 58 0 ether_multi 1 0K 0K 78643K 4 0 mrt 0 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 234 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 124 39K 48K 78643K 1519 0 UVM aobj 16 2K 3K 78643K 22 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 21 0 NDP 9 0K 0K 78643K 21 0 temp 95 3862K 3926K 78643K 3518 0 kqueue 4 5K 9K 78643K 49 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 8 0 2 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 59 0 12 2 0 2 2 0 8 0 unpcb 120 95 0 82 1 0 1 1 0 8 0 syncache 264 7 0 7 2 1 1 1 0 8 1 tcpqe 32 631 0 631 2 1 1 1 0 8 1 tcpcb 544 97 0 93 1 0 1 1 0 8 0 inpcb 296 317 0 309 2 0 2 2 0 8 1 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 12 0 4 1 0 1 1 0 8 0 pffrag 232 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 47 0 47 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 56 0 54 1 0 1 1 0 8 0 pfstitem 24 15 0 2 1 0 1 1 0 8 0 pfstkey 112 15 0 2 1 0 1 1 0 8 0 pfstate 328 15 0 2 2 0 2 2 0 8 0 pfrule 1360 36 0 27 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 227 0 6 14 0 14 14 0 8 0 art_table 32 228 0 6 2 0 2 2 0 8 0 art_node 16 58 0 16 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 6 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 43 0 33 1 0 1 1 0 8 0 shmpl 112 19 0 6 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1634 0 230 89 0 89 89 0 8 0 ffsino 272 1634 0 230 96 1 95 95 0 8 0 nchpl 144 2142 0 527 60 0 60 60 0 8 0 uvmvnodes 72 1713 0 0 32 0 32 32 0 8 0 vnodes 208 1713 0 0 91 0 91 91 0 8 0 namei 1024 5775 0 5775 2 1 1 1 0 8 1 percpumem 16 35 0 3 1 0 1 1 0 8 0 vcpupl 1984 1 0 0 1 0 1 1 0 8 0 vmpool 560 1 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 15 0 13 1 0 1 1 0 8 0 scxspl 192 5988 0 5988 9 3 6 7 0 8 6 plimitpl 152 25 0 17 1 0 1 1 0 8 0 sigapl 424 390 0 358 4 0 4 4 0 8 0 futexpl 56 2661 0 2661 1 0 1 1 0 8 1 knotepl 112 122 0 103 1 0 1 1 0 8 0 kqueuepl 144 88 0 85 1 0 1 1 0 8 0 pipepl 304 106 0 96 2 0 2 2 0 8 1 fdescpl 496 374 0 358 3 0 3 3 0 8 0 filepl 152 2333 0 2229 6 1 5 5 0 8 0 lockfpl 104 43 0 42 1 0 1 1 0 8 0 lockfspl 48 18 0 17 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 24 0 13 1 0 1 1 0 8 0 ucredpl 96 231 0 222 1 0 1 1 0 8 0 zombiepl 144 358 0 357 2 1 1 1 0 8 0 processpl 992 390 0 357 6 1 5 5 0 8 0 procpl 624 745 0 702 4 0 4 4 0 8 0 sosppl 128 4 0 4 1 0 1 1 0 8 1 sockpl 400 449 0 426 5 1 4 4 0 8 1 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 175 0 0 21 0 21 21 0 8 0 mtagpl 96 14 0 0 1 0 1 1 0 8 0 mbufpl 256 254 0 0 15 0 15 15 0 8 0 bufpl 280 3535 0 133 243 0 243 243 0 8 0 anonpl 16 53833 0 37687 75 1 74 74 0 124 5 amapchunkpl 152 2130 0 1975 12 0 12 12 0 158 4 amappl16 192 1656 0 741 48 1 47 48 0 8 0 amappl15 184 2 0 1 1 0 1 1 0 8 0 amappl14 176 90 0 84 1 0 1 1 0 8 0 amappl13 168 28 0 25 1 0 1 1 0 8 0 amappl12 160 5 0 4 2 1 1 1 0 8 0 amappl11 152 55 0 40 1 0 1 1 0 8 0 amappl10 144 17 0 14 1 0 1 1 0 8 0 amappl9 136 469 0 464 1 0 1 1 0 8 0 amappl8 128 352 0 318 2 0 2 2 0 8 0 amappl7 120 119 0 107 1 0 1 1 0 8 0 amappl6 112 26 0 20 1 0 1 1 0 8 0 amappl5 104 276 0 260 1 0 1 1 0 8 0 amappl4 96 485 0 459 1 0 1 1 0 8 0 amappl3 88 171 0 164 1 0 1 1 0 8 0 amappl2 80 1995 0 1926 2 0 2 2 0 8 0 amappl1 72 18221 0 17777 23 13 10 18 0 8 0 amappl 80 1000 0 953 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 21 0 6 1 0 1 1 0 8 0 uaddrrnd 24 375 0 358 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 375 0 358 1 0 1 1 0 8 0 vmmpekpl 168 7018 0 6983 2 0 2 2 0 8 0 vmmpepl 168 53166 0 51078 123 11 112 115 0 357 16 vmsppl 368 374 0 358 2 0 2 2 0 8 0 pdppl 4096 757 0 717 7 1 6 6 0 8 0 pvpl 32 172120 0 152832 178 0 178 178 0 265 14 pmappl 232 374 0 358 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 268 0 7 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff827adff0) 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 __mp_lock(ffffffff8291afc0) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8291afc0) at __mp_lock+0x127 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff8291afc0,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435 sleep_finish(ffff800020e7c860,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800020e7c860,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800020e7c860,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff828ad0b8,120,ffffffff823f384f,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff800020e3fc40,ffff800020e7c990,ffff800020e7c9e0) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800020e7ca60) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e7ca60) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00004ff38, count: 3 ddb{0}> trace x86_ipi_db(ffffffff827adff0) 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 __mp_lock(ffffffff8291afc0) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8291afc0) at __mp_lock+0x127 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff8291afc0,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435 sleep_finish(ffff800020e7c860,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800020e7c860,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800020e7c860,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff828ad0b8,120,ffffffff823f384f,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff800020e3fc40,ffff800020e7c990,ffff800020e7c9e0) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800020e7ca60) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e7ca60) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00004ff38, 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:398 panic(ffffffff823fffef) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff8292cbb0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff8292cbb0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff8292cbb0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd806d7d2500,db74,5a0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d7d2500,db74,5a0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 ip_fragment(fffffd806d7d2500,ffff80000017b2a8,5b4) at ip_fragment+0x324 ip_output(fffffd806d7d2500,0,fffffd806f6849b0,0,0,fffffd806f684940) at ip_output+0xfd7 sys/netinet/ip_output.c:499 udp_output(fffffd806f684940,fffffd806d7d2500,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017 sosend(fffffd80643397f0,0,ffff800020ed2740,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020e09768,6,ffff800020ed2820,0,ffff800020ed2900) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020e09768,ffff800020ed28b8,ffff800020ed2900) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff800020ed2980) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ed2980) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe630f38c470, count: 2 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823fffef) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff8292cbb0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff8292cbb0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff8292cbb0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd806d7d2500,db74,5a0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d7d2500,db74,5a0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 ip_fragment(fffffd806d7d2500,ffff80000017b2a8,5b4) at ip_fragment+0x324 ip_output(fffffd806d7d2500,0,fffffd806f6849b0,0,0,fffffd806f684940) at ip_output+0xfd7 sys/netinet/ip_output.c:499 udp_output(fffffd806f684940,fffffd806d7d2500,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017 sosend(fffffd80643397f0,0,ffff800020ed2740,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020e09768,6,ffff800020ed2820,0,ffff800020ed2900) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020e09768,ffff800020ed28b8,ffff800020ed2900) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff800020ed2980) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ed2980) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe630f38c470, count: -13