panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd8063f57400+24 0x5640193117423d0e!=0x564019b174bae90e Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *155743 89269 0 0 0x4000000 1 syz-executor.1 196081 9695 0 0x14000 0x40000200 0 softclock db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240acfd) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828ce6d0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 m_get sys/kern/uipc_mbuf.c:250 [inline] m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 sys/kern/uipc_mbuf.c:1436 ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d ip_mloopback sys/netinet/ip_output.c:1705 [inline] ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d sys/netinet/ip_output.c:327 udp_output(fffffd806f662128,fffffd8063f53000,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017 sosend(fffffd806f6634b0,0,ffff8000230dd1f8,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff800023f9af08,3,ffff8000230dd1f8,0,ffff8000230dd2e0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800023f9af08,ffff8000230dd298,ffff8000230dd2e0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff8000230dd360) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230dd360) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdf0c3acd910, count: 3 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 0xfffffd8063f57400+24 0x5640193117423d0e!=0x564019b174bae90e ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240acfd) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828ce6d0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 m_get sys/kern/uipc_mbuf.c:250 [inline] m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 sys/kern/uipc_mbuf.c:1436 ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d ip_mloopback sys/netinet/ip_output.c:1705 [inline] ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d sys/netinet/ip_output.c:327 udp_output(fffffd806f662128,fffffd8063f53000,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017 sosend(fffffd806f6634b0,0,ffff8000230dd1f8,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff800023f9af08,3,ffff8000230dd1f8,0,ffff8000230dd2e0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800023f9af08,ffff8000230dd298,ffff8000230dd2e0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff8000230dd360) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230dd360) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdf0c3acd910, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000230dcc30 rbx 0xffff8000230dcce0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff8000230dcbf0 r9 0xffffffff814bc41f kprintf+0x16f r10 0x1 r11 0xd5b65becbd750c7 r12 0x3000000008 r13 0xffff8000230dcc40 r14 0x100 r15 0x1 rip 0xffffffff81c991c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000230dcc20 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=155743 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800023f9bb60,0xffff800023f9a048 process=0xffff800020e34bd0 user=0xffff8000230d8000, vmspace=0xfffffd806e9142e8 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 47125 431607 4699 0 2 0 syz-executor.0 89269 271560 815 0 2 0 syz-executor.1 *89269 155743 815 0 7 0x4000000 syz-executor.1 8759 449335 0 0 3 0x14200 acct acct 40189 349312 0 0 3 0x14280 nfsidl nfsio 6240 322576 0 0 3 0x14280 nfsidl nfsio 79926 465737 0 0 3 0x14280 nfsidl nfsio 65321 267372 0 0 3 0x14280 nfsidl nfsio 26424 388251 0 0 3 0x14280 nfsidl nfsio 84387 252026 0 0 3 0x14280 nfsidl nfsio 62177 416909 0 0 3 0x14280 nfsidl nfsio 11128 417533 0 0 3 0x14280 nfsidl nfsio 32224 88775 0 0 3 0x14280 nfsidl nfsio 84254 274423 0 0 3 0x14280 nfsidl nfsio 79522 138142 0 0 3 0x14280 nfsidl nfsio 41593 424754 0 0 3 0x14280 nfsidl nfsio 85335 106765 0 0 3 0x14280 nfsidl nfsio 2056 173404 0 0 3 0x14280 nfsidl nfsio 31446 112641 0 0 3 0x14280 nfsidl nfsio 7341 500027 0 0 3 0x14280 nfsidl nfsio 82031 312469 0 0 3 0x14280 nfsidl nfsio 13642 451644 0 0 3 0x14280 nfsidl nfsio 30791 230184 0 0 3 0x14280 nfsidl nfsio 6657 46648 0 0 3 0x14280 nfsidl nfsio 15060 522201 0 0 3 0x14200 bored sosplice 815 278197 3478 0 2 0x482 syz-executor.1 4699 201710 3478 0 3 0x82 nanosleep syz-executor.0 3478 252672 10073 0 3 0x82 thrsleep syz-fuzzer 3478 325721 10073 0 3 0x4000082 nanosleep syz-fuzzer 3478 148689 10073 0 3 0x4000082 thrsleep syz-fuzzer 3478 42040 10073 0 3 0x4000082 thrsleep syz-fuzzer 3478 62948 10073 0 3 0x4000082 thrsleep syz-fuzzer 3478 331230 10073 0 3 0x4000082 kqread syz-fuzzer 3478 126908 10073 0 3 0x4000082 thrsleep syz-fuzzer 3478 432482 10073 0 3 0x4000082 thrsleep syz-fuzzer 10073 7248 6049 0 3 0x10008a pause ksh 6049 244157 72857 0 3 0x92 select sshd 98373 163001 1 0 3 0x100083 ttyin getty 72857 216227 1 0 3 0x80 select sshd 47223 342289 47412 74 3 0x100092 bpf pflogd 47412 326770 1 0 3 0x80 netio pflogd 12410 82839 94176 73 3 0x100090 kqread syslogd 94176 272554 1 0 3 0x100082 netio syslogd 4606 490654 1 77 3 0x100090 poll dhclient 25845 239158 1 0 3 0x80 poll dhclient 8371 373283 0 0 3 0x14200 bored smr 66936 482113 0 0 2 0x14200 zerothread 76918 452914 0 0 3 0x14200 aiodoned aiodoned 10711 118696 0 0 3 0x14200 syncer update 60976 450617 0 0 3 0x14200 cleaner cleaner 65109 175700 0 0 3 0x14200 reaper reaper 16533 297534 0 0 3 0x14200 pgdaemon pagedaemon 48664 178456 0 0 3 0x14200 bored crynlk 90616 127218 0 0 3 0x14200 bored crypto 57987 20002 0 0 3 0x40014200 acpi0 acpi0 53209 329756 0 0 3 0x40014200 idle1 70793 84220 0 0 3 0x14200 bored softnet 63441 165075 0 0 3 0x14200 bored systqmp 21025 298359 0 0 3 0x14200 bored systq 9695 196081 0 0 7 0x40014200 softclock 7482 38905 0 0 3 0x40014200 idle0 1 430832 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 89269 (syz-executor.1) thread 0xffff800023f9af08 (155743) exclusive rwlock netlock r = 0 (0xffffffff827a6120) #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 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #4 sys_write+0x83 sys/kern/sys_generic.c:285 #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 9518 6424K 7582K 78643K 15157 0 pcb 13 8K 8K 78643K 147 0 rtable 113 16K 19K 78643K 688 0 ifaddr 88 18K 18K 78643K 222 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 67 0 ioctlops 0 0K 4K 78643K 2170 0 iov 0 0K 16K 78643K 95 0 mount 1 1K 1K 78643K 1 0 vnodes 1222 77K 77K 78643K 2317 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 21 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 218 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 1295 0 sigio 0 0K 0K 78643K 20 0 proc 63 63K 95K 78643K 472 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 420 0 in_multi 64 3K 3K 78643K 228 0 ether_multi 1 0K 0K 78643K 24 0 mrt 0 0K 0K 78643K 8 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 261 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 186 77K 92K 78643K 4976 0 UVM aobj 55 4K 5K 78643K 67 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 131 0 NDP 12 0K 0K 78643K 41 0 temp 135 3880K 3944K 78643K 13258 0 kqueue 3 4K 16K 78643K 47 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 13 0 6 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 88 43 0 41 1 0 1 1 0 8 0 rtentry 112 114 0 78 2 0 2 2 0 8 0 unpcb 120 916 0 906 1 0 1 1 0 8 0 syncache 272 12 0 12 4 4 0 1 0 8 0 tcpqe 32 252 0 252 2 2 0 1 0 8 0 tcpcb 592 294 0 286 7 5 2 2 0 8 0 inpcb 296 2095 0 2087 5 3 2 2 0 8 1 rttmr 72 3 0 3 3 3 0 1 0 8 0 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 6 0 6 1 1 0 1 0 8 0 nd6 48 32 0 25 1 0 1 1 0 8 0 pkpcb 40 13 0 13 3 3 0 1 0 8 0 ppxss 1136 2 0 2 2 2 0 1 0 8 0 pffrag 232 14 0 13 3 2 1 1 0 482 0 pffrnode 88 14 0 13 3 2 1 1 0 8 0 pffrent 40 374 0 373 3 2 1 1 0 8 0 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 96 0 87 6 5 1 2 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 100 0 83 1 0 1 1 0 8 0 pfstkey 112 100 0 83 2 0 2 2 0 8 0 pfstate 328 100 0 83 5 0 5 5 0 8 0 pfrule 1360 50 0 35 6 4 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 346 0 106 16 1 15 15 0 8 0 art_table 32 347 0 106 2 0 2 2 0 8 0 art_node 16 112 0 80 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 9 1 0 1 1 0 8 0 semapl 112 216 0 206 1 0 1 1 0 8 0 shmpl 112 64 0 13 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2931 0 1532 89 1 88 89 0 8 0 ffsino 272 2931 0 1532 94 0 94 94 0 8 0 nchpl 144 4904 0 3303 60 0 60 60 0 8 0 uvmvnodes 72 3989 0 0 73 0 73 73 0 8 0 vnodes 208 3989 0 0 210 0 210 210 0 8 0 namei 1024 13406 0 13406 4 3 1 1 0 8 1 percpumem 16 44 0 12 1 0 1 1 0 8 0 vcpupl 1984 5 0 0 1 0 1 1 0 8 0 vmpool 560 15 0 10 1 0 1 1 0 8 0 pfiaddrpl 120 40 0 32 2 1 1 1 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 200 14431 0 14431 14 13 1 7 0 8 1 plimitpl 152 58 0 50 1 0 1 1 0 8 0 sigapl 424 1534 0 1480 9 2 7 7 0 8 1 futexpl 56 17963 0 17963 4 3 1 1 0 8 1 knotepl 112 110 0 90 1 0 1 1 0 8 0 kqueuepl 152 145 0 141 1 0 1 1 0 8 0 pipepl 304 236 0 225 4 2 2 2 0 8 1 fdescpl 496 1495 0 1478 3 0 3 3 0 8 0 filepl 152 8605 0 8502 5 0 5 5 0 8 0 lockfpl 104 233 0 232 1 0 1 1 0 8 0 lockfspl 48 78 0 77 1 0 1 1 0 8 0 sessionpl 120 18 0 7 1 0 1 1 0 8 0 pgrppl 48 34 0 23 1 0 1 1 0 8 0 ucredpl 96 513 0 504 1 0 1 1 0 8 0 zombiepl 144 1480 0 1480 1 0 1 1 0 8 1 processpl 1008 1534 0 1480 7 0 7 7 0 8 0 procpl 632 4115 0 4053 8 2 6 6 0 8 0 srpgc 72 2 0 2 1 1 0 1 0 8 0 sosppl 144 11 0 11 4 4 0 1 0 8 0 sockpl 400 3068 0 3048 10 7 3 4 0 8 1 mcl64k 65536 10 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 14 0 0 2 0 2 2 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 16 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 195 0 0 24 1 23 24 0 8 0 mtagpl 96 301 0 0 8 0 8 8 0 8 0 mbufpl 256 754 0 0 47 0 47 47 0 8 0 bufpl 280 5213 0 128 364 0 364 364 0 8 0 anonpl 16 156638 0 138101 130 39 91 92 0 124 14 amapchunkpl 152 8438 0 8145 33 20 13 25 0 158 0 amappl16 192 6294 0 5420 92 40 52 56 0 8 8 amappl15 184 2 0 1 1 0 1 1 0 8 0 amappl14 176 608 0 604 1 0 1 1 0 8 0 amappl13 168 688 0 682 1 0 1 1 0 8 0 amappl12 160 675 0 669 1 0 1 1 0 8 0 amappl11 152 664 0 647 1 0 1 1 0 8 0 amappl10 144 20 0 17 1 0 1 1 0 8 0 amappl9 136 365 0 364 1 0 1 1 0 8 0 amappl8 128 386 0 333 2 0 2 2 0 8 0 amappl7 120 114 0 102 1 0 1 1 0 8 0 amappl6 112 33 0 26 1 0 1 1 0 8 0 amappl5 104 794 0 775 1 0 1 1 0 8 0 amappl4 96 1104 0 1072 1 0 1 1 0 8 0 amappl3 88 768 0 757 1 0 1 1 0 8 0 amappl2 80 11697 0 11624 2 0 2 2 0 8 0 amappl1 72 52551 0 52104 23 13 10 18 0 8 0 amappl 80 4402 0 4324 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 66 0 12 1 0 1 1 0 8 0 uaddrrnd 24 1510 0 1488 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1510 0 1488 1 0 1 1 0 8 0 vmmpekpl 168 14093 0 14053 2 0 2 2 0 8 0 vmmpepl 168 198329 0 196150 152 48 104 116 0 357 8 vmsppl 368 1509 0 1488 3 1 2 3 0 8 0 pdppl 4096 3027 0 2981 8 2 6 7 0 8 0 pvpl 32 473965 0 452060 278 64 214 216 0 265 35 pmappl 232 1509 0 1488 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 318 0 26 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff827b4ff0) 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(ffffffff828dd1c8) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828dd1c8) at __mp_lock+0x12e sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff828dd1c8,1) 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(ffff800020d96ef8,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 softclock_thread(ffff800020d89148) at softclock_thread+0x103 sys/kern/kern_timeout.c:601 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff827b4ff0) 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(ffffffff828dd1c8) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828dd1c8) at __mp_lock+0x12e sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff828dd1c8,1) 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(ffff800020d96ef8,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 softclock_thread(ffff800020d89148) at softclock_thread+0x103 sys/kern/kern_timeout.c:601 end trace frame: 0x0, count: -8 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(ffffffff8240acfd) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828ce6d0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 m_get sys/kern/uipc_mbuf.c:250 [inline] m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 sys/kern/uipc_mbuf.c:1436 ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d ip_mloopback sys/netinet/ip_output.c:1705 [inline] ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d sys/netinet/ip_output.c:327 udp_output(fffffd806f662128,fffffd8063f53000,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017 sosend(fffffd806f6634b0,0,ffff8000230dd1f8,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff800023f9af08,3,ffff8000230dd1f8,0,ffff8000230dd2e0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800023f9af08,ffff8000230dd298,ffff8000230dd2e0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff8000230dd360) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230dd360) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdf0c3acd910, count: 3 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240acfd) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828ce6d0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 m_get sys/kern/uipc_mbuf.c:250 [inline] m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 sys/kern/uipc_mbuf.c:1436 ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d ip_mloopback sys/netinet/ip_output.c:1705 [inline] ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d sys/netinet/ip_output.c:327 udp_output(fffffd806f662128,fffffd8063f53000,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017 sosend(fffffd806f6634b0,0,ffff8000230dd1f8,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff800023f9af08,3,ffff8000230dd1f8,0,ffff8000230dd2e0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800023f9af08,ffff8000230dd298,ffff8000230dd2e0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff8000230dd360) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230dd360) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdf0c3acd910, count: -12