panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd80687f6700+16 0x0!=0x7cc1a24cf62e3876 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 504431 56158 0 0 0x4000000 0 syz-executor.1 *512450 9414 0 0 0 1K dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240bdef) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828f7de8,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8069cef700,0,3b9aca00,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8069cef700,0,3b9aca00,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 rtm_sendup(fffffd806f6667d0,fffffd8069cef700,1) at rtm_sendup+0x5f sys/net/rtsock.c:588 route_input(fffffd8069cef700,fffffd806f666000,2) at route_input+0x1cc sys/net/rtsock.c:560 route_output(fffffd8069cef700,fffffd806f666000,0,0) at route_output+0x878 sys/net/rtsock.c:868 route_usrreq(fffffd806f666000,9,fffffd8069cef700,0,0,ffff800020dd7150) at route_usrreq+0x36f sys/net/rtsock.c:275 sosend(fffffd806f666000,0,ffff800020e1e1a0,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff800020dd7150,6,ffff800020e1e1a0,0,ffff800020e1e290) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_writev(ffff800020dd7150,ffff800020e1e240,ffff800020e1e290) at sys_writev+0xa7 sys/kern/sys_generic.c:312 syscall(ffff800020e1e310) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e1e310) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffda6f0, count: 1 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 0xfffffd80687f6700+16 0x0!=0x7cc1a24cf62e3876 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240bdef) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828f7de8,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8069cef700,0,3b9aca00,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8069cef700,0,3b9aca00,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 rtm_sendup(fffffd806f6667d0,fffffd8069cef700,1) at rtm_sendup+0x5f sys/net/rtsock.c:588 route_input(fffffd8069cef700,fffffd806f666000,2) at route_input+0x1cc sys/net/rtsock.c:560 route_output(fffffd8069cef700,fffffd806f666000,0,0) at route_output+0x878 sys/net/rtsock.c:868 route_usrreq(fffffd806f666000,9,fffffd8069cef700,0,0,ffff800020dd7150) at route_usrreq+0x36f sys/net/rtsock.c:275 sosend(fffffd806f666000,0,ffff800020e1e1a0,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff800020dd7150,6,ffff800020e1e1a0,0,ffff800020e1e290) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_writev(ffff800020dd7150,ffff800020e1e240,ffff800020e1e290) at sys_writev+0xa7 sys/kern/sys_generic.c:312 syscall(ffff800020e1e310) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e1e310) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffda6f0, count: -14 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e1da60 rbx 0xffff800020e1db10 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff800020e1da20 r9 0xffffffff81c9883f kprintf+0x16f r10 0x1 r11 0x3bc346b92db5b5 r12 0x3000000008 r13 0xffff800020e1da70 r14 0x100 r15 0x1 rip 0xffffffff81c6ddc8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e1da50 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (dhclient) pid=512450 stat=onproc flags process=0 proc=0 pri=24, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020dd69e8,0xffff800020dd73d8 process=0xffff800020df0400 user=0xffff800020e19000, vmspace=0xfffffd807efff000 estcpu=1, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 56158 199316 66903 0 2 0 syz-executor.1 56158 504431 66903 0 7 0x4000000 syz-executor.1 43499 311511 82219 0 3 0x82 piperd syz-executor.0 64336 370288 0 0 3 0x14200 bored sosplice 72696 477004 0 0 3 0x14200 acct acct 66903 331743 82219 0 3 0x82 nanosleep syz-executor.1 82219 134417 80367 0 3 0x82 thrsleep syz-fuzzer 82219 258478 80367 0 3 0x4000082 nanosleep syz-fuzzer 82219 365969 80367 0 3 0x4000082 thrsleep syz-fuzzer 82219 334817 80367 0 3 0x4000082 thrsleep syz-fuzzer 82219 74757 80367 0 3 0x4000082 kqread syz-fuzzer 82219 272043 80367 0 3 0x4000082 thrsleep syz-fuzzer 82219 321320 80367 0 3 0x4000082 thrsleep syz-fuzzer 82219 386980 80367 0 2 0x4000002 syz-fuzzer 80367 145336 58824 0 3 0x10008a pause ksh 58824 322100 16143 0 3 0x92 select sshd 97528 468996 1 0 3 0x100083 ttyin getty 16143 134171 1 0 3 0x80 select sshd 59383 313513 28621 74 3 0x100092 bpf pflogd 28621 313750 1 0 3 0x80 netio pflogd 90722 210679 81695 73 3 0x100090 kqread syslogd 81695 142690 1 0 3 0x100082 netio syslogd 38266 456365 1 77 3 0x100090 poll dhclient * 9414 512450 1 0 7 0 dhclient 23211 40515 0 0 3 0x14200 bored smr 93073 134341 0 0 2 0x14200 zerothread 27695 447737 0 0 3 0x14200 aiodoned aiodoned 61477 524077 0 0 3 0x14200 syncer update 13451 346275 0 0 3 0x14200 cleaner cleaner 69025 452230 0 0 3 0x14200 reaper reaper 10784 480998 0 0 3 0x14200 pgdaemon pagedaemon 23059 23375 0 0 3 0x14200 bored crynlk 53877 234684 0 0 3 0x14200 bored crypto 88753 227314 0 0 3 0x40014200 acpi0 acpi0 39182 299051 0 0 3 0x40014200 idle1 26998 250208 0 0 3 0x14200 bored softnet 21044 270416 0 0 3 0x14200 bored systqmp 65842 312627 0 0 3 0x14200 bored systq 47790 54953 0 0 3 0x40014200 bored softclock 66161 25360 0 0 3 0x40014200 idle0 1 428890 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 9414 (dhclient) thread 0xffff800020dd7150 (512450) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828c5c88) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 solock+0x66 sys/kern/uipc_socket2.c:292 #2 sosend+0x559 sys/kern/uipc_socket.c:543 #3 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #4 sys_writev+0xa7 sys/kern/sys_generic.c:312 #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 9517 6430K 7702K 78643K 12378 0 pcb 13 8K 8K 78643K 150 0 rtable 110 4K 5K 78643K 418 0 ifaddr 79 16K 16K 78643K 132 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 51 0 ioctlops 0 0K 4K 78643K 1520 0 iov 0 0K 12K 78643K 289 0 mount 1 1K 1K 78643K 1 0 vnodes 1236 78K 78K 78643K 1700 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 19 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 104 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 561 0 sigio 0 0K 0K 78643K 14 0 proc 62 63K 83K 78643K 587 0 subproc 32 2K 2K 78643K 85 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 44 0 in_multi 54 2K 3K 78643K 151 0 ether_multi 1 0K 0K 78643K 10 0 mrt 1 0K 0K 78643K 4 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 273 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 176 45K 46K 78643K 2869 0 UVM aobj 67 7K 8K 78643K 71 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 65 0 NDP 12 0K 0K 78643K 30 0 temp 117 3872K 3936K 78643K 7834 0 kqueue 3 4K 8K 78643K 18 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 7 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 88 44 0 41 1 0 1 1 0 8 0 rtentry 112 97 0 53 2 0 2 2 0 8 0 unpcb 120 169 0 159 1 0 1 1 0 8 0 syncache 272 4 0 4 1 1 0 1 0 8 0 tcpqe 32 44 0 44 1 1 0 1 0 8 0 tcpcb 592 122 0 118 3 2 1 2 0 8 0 inpcb 296 608 0 601 6 4 2 2 0 8 1 rttmr 72 1 0 0 1 0 1 1 0 8 0 nd6 48 26 0 20 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 pfstscr 40 8 0 8 2 2 0 1 0 8 0 pffrag 232 1 0 1 1 1 0 1 0 482 0 pffrnode 88 1 0 1 1 1 0 1 0 8 0 pffrent 40 3 0 3 1 1 0 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 12 0 10 1 0 1 1 0 8 0 pfstitem 24 48 0 22 1 0 1 1 0 8 0 pfstkey 112 58 0 32 1 0 1 1 0 8 0 pfstate 328 52 0 26 3 0 3 3 0 8 0 pfrule 1360 28 0 20 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 435 0 189 16 0 16 16 0 8 0 art_table 32 436 0 189 2 0 2 2 0 8 0 art_node 16 96 0 55 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 3 1 0 1 1 0 8 0 semapl 112 100 0 90 1 0 1 1 0 8 0 shmpl 112 68 0 4 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2040 0 635 89 0 89 89 0 8 0 ffsino 272 2040 0 635 95 1 94 95 0 8 0 nchpl 144 3123 0 1529 60 0 60 60 0 8 0 uvmvnodes 72 2521 0 0 46 0 46 46 0 8 0 vnodes 208 2521 0 0 133 0 133 133 0 8 0 namei 1024 8994 0 8994 3 2 1 1 0 8 1 percpumem 16 36 0 4 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 2 2 1 1 1 0 8 0 pfiaddrpl 120 5 0 3 1 0 1 1 0 8 0 scxspl 200 8798 0 8798 11 10 1 7 0 8 1 plimitpl 152 54 0 46 1 0 1 1 0 8 0 sigapl 424 769 0 736 4 0 4 4 0 8 0 futexpl 56 7520 0 7520 4 3 1 1 0 8 1 knotepl 112 116 0 96 1 0 1 1 0 8 0 kqueuepl 152 60 0 56 1 0 1 1 0 8 0 pipepl 304 156 0 145 4 2 2 2 0 8 1 fdescpl 496 752 0 736 3 0 3 3 0 8 0 filepl 152 4266 0 4163 6 1 5 5 0 8 1 lockfpl 104 65 0 64 1 0 1 1 0 8 0 lockfspl 48 23 0 22 1 0 1 1 0 8 0 sessionpl 120 21 0 10 1 0 1 1 0 8 0 pgrppl 48 31 0 20 1 0 1 1 0 8 0 ucredpl 96 355 0 346 1 0 1 1 0 8 0 zombiepl 144 736 0 736 2 1 1 1 0 8 1 processpl 1008 769 0 736 6 1 5 5 0 8 0 procpl 632 1882 0 1841 7 3 4 5 0 8 0 sosppl 144 7 0 7 1 1 0 1 0 8 0 sockpl 400 832 0 812 8 5 3 4 0 8 1 mcl64k 65536 262 0 0 33 2 31 33 0 8 1 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 271 0 0 33 0 33 33 0 8 0 mtagpl 96 22 0 0 1 0 1 1 0 8 0 mbufpl 256 355 0 0 21 0 21 21 0 8 0 bufpl 280 4229 0 127 293 0 293 293 0 8 0 anonpl 16 103120 0 84663 98 23 75 89 0 124 0 amapchunkpl 152 5071 0 4736 32 17 15 27 0 158 0 amappl16 192 3459 0 2618 67 16 51 54 0 8 8 amappl15 184 95 0 94 2 1 1 1 0 8 0 amappl14 176 245 0 242 1 0 1 1 0 8 0 amappl13 168 86 0 82 1 0 1 1 0 8 0 amappl12 160 57 0 54 1 0 1 1 0 8 0 amappl11 152 65 0 50 1 0 1 1 0 8 0 amappl10 144 103 0 98 1 0 1 1 0 8 0 amappl9 136 458 0 456 1 0 1 1 0 8 0 amappl8 128 511 0 472 2 0 2 2 0 8 0 amappl7 120 143 0 130 1 0 1 1 0 8 0 amappl6 112 29 0 25 1 0 1 1 0 8 0 amappl5 104 614 0 598 1 0 1 1 0 8 0 amappl4 96 574 0 543 1 0 1 1 0 8 0 amappl3 88 411 0 401 1 0 1 1 0 8 0 amappl2 80 4951 0 4883 2 0 2 2 0 8 0 amappl1 72 31759 0 31300 23 13 10 18 0 8 0 amappl 80 2244 0 2156 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 70 0 4 2 0 2 2 0 8 0 uaddrrnd 24 756 0 738 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 756 0 738 1 0 1 1 0 8 0 vmmpekpl 168 9610 0 9572 2 0 2 2 0 8 0 vmmpepl 168 105087 0 103016 176 53 123 124 0 357 29 vmsppl 368 755 0 738 2 0 2 2 0 8 0 pdppl 4096 1519 0 1478 7 1 6 6 0 8 0 pvpl 32 303813 0 282150 231 48 183 208 0 265 5 pmappl 232 755 0 738 5 3 2 2 0 8 1 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 319 0 15 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff827b8ff0) 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 __sanitizer_cov_trace_cmp4(ffffffff828c5a80,ffffffff828c5a80) at __sanitizer_cov_trace_cmp4 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f __mp_lock(ffffffff828c5a80) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828c5a80) at __mp_lock+0x12e sys/kern/kern_lock.c:147 sys_futex(ffff800020ecaa00,ffff8000230d77f0,ffff8000230d7840) at sys_futex+0xf6 sys/kern/sys_futex.c:109 syscall(ffff8000230d78c0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230d78c0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x18cb41526f0, count: 5 ddb{0}> trace x86_ipi_db(ffffffff827b8ff0) 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 __sanitizer_cov_trace_cmp4(ffffffff828c5a80,ffffffff828c5a80) at __sanitizer_cov_trace_cmp4 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f __mp_lock(ffffffff828c5a80) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828c5a80) at __mp_lock+0x12e sys/kern/kern_lock.c:147 sys_futex(ffff800020ecaa00,ffff8000230d77f0,ffff8000230d7840) at sys_futex+0xf6 sys/kern/sys_futex.c:109 syscall(ffff8000230d78c0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230d78c0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x18cb41526f0, count: -10 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(ffffffff8240bdef) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828f7de8,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8069cef700,0,3b9aca00,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8069cef700,0,3b9aca00,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 rtm_sendup(fffffd806f6667d0,fffffd8069cef700,1) at rtm_sendup+0x5f sys/net/rtsock.c:588 route_input(fffffd8069cef700,fffffd806f666000,2) at route_input+0x1cc sys/net/rtsock.c:560 route_output(fffffd8069cef700,fffffd806f666000,0,0) at route_output+0x878 sys/net/rtsock.c:868 route_usrreq(fffffd806f666000,9,fffffd8069cef700,0,0,ffff800020dd7150) at route_usrreq+0x36f sys/net/rtsock.c:275 sosend(fffffd806f666000,0,ffff800020e1e1a0,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff800020dd7150,6,ffff800020e1e1a0,0,ffff800020e1e290) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_writev(ffff800020dd7150,ffff800020e1e240,ffff800020e1e290) at sys_writev+0xa7 sys/kern/sys_generic.c:312 syscall(ffff800020e1e310) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e1e310) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffda6f0, count: 1 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240bdef) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828f7de8,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8069cef700,0,3b9aca00,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8069cef700,0,3b9aca00,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 rtm_sendup(fffffd806f6667d0,fffffd8069cef700,1) at rtm_sendup+0x5f sys/net/rtsock.c:588 route_input(fffffd8069cef700,fffffd806f666000,2) at route_input+0x1cc sys/net/rtsock.c:560 route_output(fffffd8069cef700,fffffd806f666000,0,0) at route_output+0x878 sys/net/rtsock.c:868 route_usrreq(fffffd806f666000,9,fffffd8069cef700,0,0,ffff800020dd7150) at route_usrreq+0x36f sys/net/rtsock.c:275 sosend(fffffd806f666000,0,ffff800020e1e1a0,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff800020dd7150,6,ffff800020e1e1a0,0,ffff800020e1e290) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_writev(ffff800020dd7150,ffff800020e1e240,ffff800020e1e290) at sys_writev+0xa7 sys/kern/sys_generic.c:312 syscall(ffff800020e1e310) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e1e310) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffda6f0, count: -14