panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd80660e0300+16 0x0!=0xd059a80345a54d73 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 141214 26496 0 0x2 0x4000480 0 syz-fuzzer * 57617 98230 0 0x12 0 1 sshd 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(fffffd806d51e200,0,e4,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d51e200,0,e4,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adade0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eaecc88,9,fffffd806d51e200,0,0,ffff8000fffff8c0) at tcp_usrreq+0xa55 sosend(fffffd806eaecc88,0,ffff800020e448c8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff8c0,4,ffff800020e448c8,0,ffff800020e449b0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff8c0,ffff800020e44960,ffff800020e449b0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e44a30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e44a30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcbd90, 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 0xfffffd80660e0300+16 0x0!=0xd059a80345a54d73 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(fffffd806d51e200,0,e4,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d51e200,0,e4,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adade0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eaecc88,9,fffffd806d51e200,0,0,ffff8000fffff8c0) at tcp_usrreq+0xa55 sosend(fffffd806eaecc88,0,ffff800020e448c8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff8c0,4,ffff800020e448c8,0,ffff800020e449b0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff8c0,ffff800020e44960,ffff800020e449b0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e44a30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e44a30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcbd90, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e44260 rbx 0xffff800020e44310 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff800020e44220 r9 0xffffffff81c9883f kprintf+0x16f r10 0x1 r11 0x9e3d04ceba938a1d r12 0x3000000008 r13 0xffff800020e44270 r14 0x100 r15 0x1 rip 0xffffffff81c6ddc8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e44250 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (sshd) pid=57617 stat=onproc flags process=12 proc=0 pri=24, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe500,0xffff8000fffffb48 process=0xffff8000ffffc7e0 user=0xffff800020e3f000, vmspace=0xfffffd806e909738 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 78713 148809 0 0 3 0x14200 acct acct 65362 287615 0 0 3 0x14200 bored sosplice 17614 405467 26496 0 3 0x82 piperd syz-executor.0 79235 73295 26496 0 2 0x2 syz-executor.1 26496 123949 96347 0 3 0x82 thrsleep syz-fuzzer 26496 141214 96347 0 7 0x4000482 syz-fuzzer 26496 243412 96347 0 3 0x4000082 thrsleep syz-fuzzer 26496 516660 96347 0 2 0x4000002 syz-fuzzer 26496 376497 96347 0 3 0x4000082 thrsleep syz-fuzzer 26496 145060 96347 0 3 0x4000082 thrsleep syz-fuzzer 26496 24986 96347 0 3 0x4000082 kqread syz-fuzzer 26496 324245 96347 0 3 0x4000082 thrsleep syz-fuzzer 26496 253382 96347 0 3 0x4000082 thrsleep syz-fuzzer 96347 80689 98230 0 3 0x10008a pause ksh *98230 57617 45805 0 7 0x12 sshd 13 320058 1 0 3 0x100083 ttyin getty 45805 209982 1 0 3 0x80 select sshd 48040 463042 23275 74 3 0x100092 bpf pflogd 23275 474155 1 0 3 0x80 netio pflogd 76078 54791 96799 73 3 0x100090 kqread syslogd 96799 245810 1 0 3 0x100082 netio syslogd 41998 434987 1 77 3 0x100090 poll dhclient 43020 128103 1 0 3 0x80 poll dhclient 25244 379371 0 0 3 0x14200 bored smr 9945 46890 0 0 3 0x14200 pgzero zerothread 18769 356161 0 0 3 0x14200 aiodoned aiodoned 92928 459810 0 0 3 0x14200 syncer update 85926 392744 0 0 3 0x14200 cleaner cleaner 11930 52623 0 0 3 0x14200 reaper reaper 92315 345449 0 0 3 0x14200 pgdaemon pagedaemon 70572 203648 0 0 3 0x14200 bored crynlk 63294 376826 0 0 3 0x14200 bored crypto 41452 292044 0 0 3 0x40014200 acpi0 acpi0 45554 162231 0 0 3 0x40014200 idle1 85082 93099 0 0 3 0x14200 bored softnet 59984 339155 0 0 3 0x14200 bored systqmp 98103 97492 0 0 3 0x14200 bored systq 53244 398693 0 0 3 0x40014200 bored softclock 25739 430608 0 0 3 0x40014200 idle0 1 183512 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 98230 (sshd) thread 0xffff8000fffff8c0 (57617) exclusive rwlock netlock r = 0 (0xffffffff826f2960) #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 9508 6411K 6861K 78643K 11098 0 pcb 13 8K 8K 78643K 64 0 rtable 115 9K 10K 78643K 410 0 ifaddr 87 18K 18K 78643K 145 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 51 0 ioctlops 0 0K 4K 78643K 1572 0 iov 0 0K 16K 78643K 30 0 mount 1 1K 1K 78643K 1 0 vnodes 1215 76K 77K 78643K 1391 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 11 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 77 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 4 9K 25K 78643K 505 0 proc 61 63K 95K 78643K 467 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 23 0 in_multi 73 3K 3K 78643K 138 0 ether_multi 1 0K 0K 78643K 8 0 mrt 0 0K 0K 78643K 7 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 248 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 203 65K 80K 78643K 2654 0 UVM aobj 37 2K 2K 78643K 39 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 49 0 NDP 11 0K 0K 78643K 29 0 temp 103 3874K 3938K 78643K 3430 0 kqueue 3 4K 12K 78643K 30 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 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 88 37 0 35 1 0 1 1 0 8 0 rtentry 112 67 0 32 2 0 2 2 0 8 0 unpcb 120 367 0 357 1 0 1 1 0 8 0 syncache 272 7 0 7 3 2 1 1 0 8 1 tcpcb 592 128 0 120 3 1 2 2 0 8 1 inpcb 296 441 0 432 3 1 2 2 0 8 0 rttmr 72 2 0 2 1 1 0 1 0 8 0 nd6 48 17 0 13 1 0 1 1 0 8 0 ppxss 1136 1 0 1 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 5 0 4 1 0 1 1 0 482 0 pffrnode 88 5 0 4 1 0 1 1 0 8 0 pffrent 40 53 0 52 1 0 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 54 0 42 3 2 1 2 0 8 0 pftag 88 3 0 1 1 0 1 1 0 8 0 pfstitem 24 16 0 8 1 0 1 1 0 8 0 pfstkey 112 16 0 8 1 0 1 1 0 8 0 pfstate 328 15 0 7 2 0 2 2 0 8 0 pfrule 1360 40 0 24 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 263 0 125 13 0 13 13 0 8 1 art_table 32 264 0 125 2 0 2 2 0 8 0 art_node 16 66 0 37 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 1 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 69 0 59 1 0 1 1 0 8 0 shmpl 112 36 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2039 0 639 89 0 89 89 0 8 0 ffsino 272 2039 0 639 94 0 94 94 0 8 0 nchpl 144 2960 0 1354 60 0 60 60 0 8 0 uvmvnodes 72 2201 0 0 41 0 41 41 0 8 0 vnodes 208 2201 0 0 116 0 116 116 0 8 0 namei 1024 7974 0 7974 1 0 1 1 0 8 1 percpumem 16 36 0 4 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 18 0 11 2 1 1 1 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 200 8760 0 8760 8 7 1 7 0 8 1 plimitpl 152 27 0 19 1 0 1 1 0 8 0 sigapl 424 722 0 690 4 0 4 4 0 8 0 futexpl 56 6997 0 6997 1 0 1 1 0 8 1 knotepl 112 98 0 78 1 0 1 1 0 8 0 kqueuepl 152 854 0 852 1 0 1 1 0 8 0 pipepl 304 123 0 112 4 2 2 2 0 8 1 fdescpl 496 705 0 690 3 0 3 3 0 8 0 filepl 152 4295 0 4193 5 0 5 5 0 8 1 lockfpl 104 108 0 107 1 0 1 1 0 8 0 lockfspl 48 35 0 34 1 0 1 1 0 8 0 sessionpl 120 18 0 7 1 0 1 1 0 8 0 pgrppl 48 28 0 17 1 0 1 1 0 8 0 ucredpl 96 334 0 325 1 0 1 1 0 8 0 zombiepl 144 690 0 690 1 0 1 1 0 8 1 processpl 1008 722 0 690 5 0 5 5 0 8 0 procpl 632 1777 0 1737 5 1 4 5 0 8 0 sosppl 144 2 0 2 1 1 0 1 0 8 0 sockpl 400 847 0 828 6 3 3 5 0 8 1 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 184 0 0 22 0 22 22 0 8 0 mtagpl 96 33 0 0 1 0 1 1 0 8 0 mbufpl 256 285 0 0 17 0 17 17 0 8 0 bufpl 280 4232 0 131 293 0 293 293 0 8 0 anonpl 16 81463 0 63060 85 4 81 84 0 124 3 amapchunkpl 152 4435 0 4132 26 11 15 26 0 158 1 amappl16 192 2996 0 2126 45 1 44 45 0 8 0 amappl15 184 2 0 1 1 0 1 1 0 8 0 amappl14 176 17 0 12 1 0 1 1 0 8 0 amappl13 168 32 0 28 1 0 1 1 0 8 0 amappl12 160 28 0 22 1 0 1 1 0 8 0 amappl11 152 238 0 222 1 0 1 1 0 8 0 amappl10 144 16 0 12 1 0 1 1 0 8 0 amappl9 136 655 0 653 1 0 1 1 0 8 0 amappl8 128 679 0 616 3 0 3 3 0 8 0 amappl7 120 115 0 102 1 0 1 1 0 8 0 amappl6 112 214 0 206 1 0 1 1 0 8 0 amappl5 104 596 0 582 1 0 1 1 0 8 0 amappl4 96 494 0 461 1 0 1 1 0 8 0 amappl3 88 148 0 139 1 0 1 1 0 8 0 amappl2 80 4718 0 4655 2 0 2 2 0 8 0 amappl1 72 30084 0 29661 24 14 10 18 0 8 0 amappl 80 2092 0 2003 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 38 0 2 1 0 1 1 0 8 0 uaddrrnd 24 709 0 690 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 709 0 690 1 0 1 1 0 8 0 vmmpekpl 168 8687 0 8652 2 0 2 2 0 8 0 vmmpepl 168 97011 0 94987 118 22 96 113 0 357 0 vmsppl 368 708 0 690 2 0 2 2 0 8 0 pdppl 4096 1425 0 1384 6 0 6 6 0 8 0 pvpl 32 261984 0 240521 197 4 193 197 0 265 12 pmappl 232 708 0 690 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 265 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(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 __mp_lock(ffffffff828c5a80) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828c5a80) at __mp_lock+0x127 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff828c5a80,1) 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(ffff800020e7e450,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800020e7e450,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800020e7e450,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff828be2e0,120,ffffffff823fea18,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff8000ffffe778,ffff800020e7e580,ffff800020e7e5d0) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800020e7e650) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e7e650) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00004df20, count: 3 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 __mp_lock(ffffffff828c5a80) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828c5a80) at __mp_lock+0x127 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff828c5a80,1) 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(ffff800020e7e450,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800020e7e450,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800020e7e450,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff828be2e0,120,ffffffff823fea18,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff8000ffffe778,ffff800020e7e580,ffff800020e7e5d0) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800020e7e650) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e7e650) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00004df20, 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(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(fffffd806d51e200,0,e4,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d51e200,0,e4,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adade0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eaecc88,9,fffffd806d51e200,0,0,ffff8000fffff8c0) at tcp_usrreq+0xa55 sosend(fffffd806eaecc88,0,ffff800020e448c8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff8c0,4,ffff800020e448c8,0,ffff800020e449b0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff8c0,ffff800020e44960,ffff800020e449b0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e44a30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e44a30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcbd90, count: 3 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(fffffd806d51e200,0,e4,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d51e200,0,e4,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adade0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eaecc88,9,fffffd806d51e200,0,0,ffff8000fffff8c0) at tcp_usrreq+0xa55 sosend(fffffd806eaecc88,0,ffff800020e448c8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff8c0,4,ffff800020e448c8,0,ffff800020e449b0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff8c0,ffff800020e44960,ffff800020e449b0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e44a30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e44a30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcbd90, count: -12