ook=C>65J.QF:-흧Cp%j`g5mx.$[~ykbϓ]̄cICիC["E ;panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd8075c9a300+16 0x0!=0xe9f5b8e453c826c Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 122562 74705 0 0x2 0x4000000 0K syz-fuzzer *412514 60858 0 0x12 0 1 sshd db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240ef1a) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff82933910) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82933910) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82933910,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8063ed6d00,134,4b4,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8063ed6d00,134,4b4,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adb4d0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eae64b8,9,fffffd806a89f200,0,0,ffff8000fffff8c0) at tcp_usrreq+0xa55 sosend(fffffd806eae64b8,0,ffff800020e5fec8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff8c0,4,ffff800020e5fec8,0,ffff800020e5ffb0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff8c0,ffff800020e5ff60,ffff800020e5ffb0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e60030) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e60030) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbc970, 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 0xfffffd8075c9a300+16 0x0!=0xe9f5b8e453c826c ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240ef1a) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff82933910) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82933910) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82933910,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8063ed6d00,134,4b4,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8063ed6d00,134,4b4,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adb4d0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eae64b8,9,fffffd806a89f200,0,0,ffff8000fffff8c0) at tcp_usrreq+0xa55 sosend(fffffd806eae64b8,0,ffff800020e5fec8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff8c0,4,ffff800020e5fec8,0,ffff800020e5ffb0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff8c0,ffff800020e5ff60,ffff800020e5ffb0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e60030) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e60030) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbc970, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e5f860 rbx 0xffff800020e5f910 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff800020e5f820 r9 0xffffffff8108ddff kprintf+0x16f r10 0x1 r11 0x305274b95a7bca7e r12 0x3000000008 r13 0xffff800020e5f870 r14 0x100 r15 0x1 rip 0xffffffff822b91e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e5f850 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (sshd) pid=412514 stat=onproc flags process=12 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe778,0xffff8000fffff658 process=0xffff8000ffffd3b0 user=0xffff800020e5b000, vmspace=0xfffffd806e9035c8 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 51672 462216 74705 0 2 0x2 syz-executor.0 86852 335599 74705 0 2 0x2 syz-executor.1 11728 274557 0 0 3 0x14200 acct acct 69383 25431 0 0 3 0x14200 bored sosplice 16238 189551 0 0 3 0x14280 nfsidl nfsio 35201 304490 0 0 3 0x14280 nfsidl nfsio 89430 51133 0 0 3 0x14280 nfsidl nfsio 9996 114693 0 0 3 0x14280 nfsidl nfsio 40763 250900 0 0 3 0x14280 nfsidl nfsio 98908 432821 0 0 3 0x14280 nfsidl nfsio 46663 357462 0 0 3 0x14280 nfsidl nfsio 24409 204314 0 0 3 0x14280 nfsidl nfsio 15775 181243 0 0 3 0x14280 nfsidl nfsio 31896 180687 0 0 3 0x14280 nfsidl nfsio 11249 81727 0 0 3 0x14280 nfsidl nfsio 59540 293364 0 0 3 0x14280 nfsidl nfsio 81921 345671 0 0 3 0x14280 nfsidl nfsio 78434 498161 0 0 3 0x14280 nfsidl nfsio 69353 421626 0 0 3 0x14280 nfsidl nfsio 21153 481459 0 0 3 0x14280 nfsidl nfsio 98293 257085 0 0 3 0x14280 nfsidl nfsio 58627 17310 0 0 3 0x14280 nfsidl nfsio 32138 47472 0 0 3 0x14280 nfsidl nfsio 68943 438413 0 0 3 0x14280 nfsidl nfsio 74705 379269 10810 0 3 0x82 thrsleep syz-fuzzer 74705 10491 10810 0 2 0x4000082 syz-fuzzer 74705 458026 10810 0 3 0x4000082 thrsleep syz-fuzzer 74705 459751 10810 0 3 0x4000082 thrsleep syz-fuzzer 74705 122562 10810 0 7 0x4000002 syz-fuzzer 74705 189727 10810 0 3 0x4000082 thrsleep syz-fuzzer 74705 365888 10810 0 3 0x4000082 thrsleep syz-fuzzer 74705 467455 10810 0 2 0x4000002 syz-fuzzer 10810 219678 60858 0 3 0x10008a pause ksh *60858 412514 30732 0 7 0x12 sshd 39769 127194 1 0 3 0x100083 ttyin getty 30732 444382 1 0 3 0x80 select sshd 79869 428062 12775 74 3 0x100092 bpf pflogd 12775 495991 1 0 3 0x80 netio pflogd 45631 502771 32519 73 3 0x100090 kqread syslogd 32519 53694 1 0 3 0x100082 netio syslogd 19069 480874 1 77 3 0x100090 poll dhclient 68299 479549 1 0 3 0x80 poll dhclient 99337 114705 0 0 3 0x14200 bored smr 55535 389202 0 0 3 0x14200 pgzero zerothread 94326 216797 0 0 3 0x14200 aiodoned aiodoned 96845 105170 0 0 3 0x14200 syncer update 50335 182011 0 0 3 0x14200 cleaner cleaner 40776 52562 0 0 3 0x14200 reaper reaper 68450 343922 0 0 3 0x14200 pgdaemon pagedaemon 26930 434013 0 0 3 0x14200 bored crynlk 16944 166071 0 0 3 0x14200 bored crypto 95028 358371 0 0 3 0x40014200 acpi0 acpi0 8862 467988 0 0 3 0x40014200 idle1 57075 183323 0 0 3 0x14200 bored softnet 13620 498678 0 0 3 0x14200 bored systqmp 91299 327383 0 0 3 0x14200 bored systq 89679 150546 0 0 3 0x40014200 bored softclock 9861 412560 0 0 3 0x40014200 idle0 1 412038 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 60858 (sshd) thread 0xffff8000fffff8c0 (412514) exclusive rwlock netlock r = 0 (0xffffffff827713e0) #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 9534 6438K 6876K 78643K 11257 0 pcb 13 8K 8K 78643K 87 0 rtable 74 4K 7K 78643K 476 0 ifaddr 81 14K 17K 78643K 164 0 counters 43 33K 34K 78643K 55 0 ioctlops 0 0K 4K 78643K 1553 0 iov 0 0K 32K 78643K 57 0 mount 1 1K 1K 78643K 1 0 vnodes 1211 76K 77K 78643K 1430 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 14 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 112 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 4 9K 25K 78643K 737 0 sigio 0 0K 0K 78643K 207 0 proc 61 63K 95K 78643K 560 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 72 0 in_multi 48 2K 3K 78643K 141 0 ether_multi 1 0K 0K 78643K 6 0 mrt 0 0K 0K 78643K 2 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 268 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 165 60K 60K 78643K 3312 0 UVM aobj 38 6K 6K 78643K 38 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 71 0 NDP 15 0K 0K 78643K 37 0 temp 146 3884K 3953K 78643K 4501 0 kqueue 3 4K 12K 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 11 0 7 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 88 41 0 39 1 0 1 1 0 8 0 rtentry 112 94 0 72 2 0 2 2 0 8 1 unpcb 120 743 0 733 1 0 1 1 0 8 0 syncache 272 4 0 4 1 1 0 1 0 8 0 tcpqe 32 494 0 494 1 1 0 1 0 8 0 tcpcb 592 114 0 103 2 1 1 2 0 8 0 inpcb 296 586 0 579 3 1 2 2 0 8 1 nd6 48 23 0 22 1 0 1 1 0 8 0 pkpcb 40 13 0 13 4 3 1 1 0 8 1 ppxss 1136 1 0 1 1 1 0 1 0 8 0 pfstscr 40 8 0 8 1 1 0 1 0 8 0 pffrag 232 3 0 3 1 1 0 1 0 482 0 pffrnode 88 3 0 3 1 1 0 1 0 8 0 pffrent 40 92 0 92 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 23 0 21 1 0 1 1 0 8 0 pfstitem 24 28 0 26 1 0 1 1 0 8 0 pfstkey 112 34 0 32 1 0 1 1 0 8 0 pfstate 328 29 0 27 2 1 1 2 0 8 0 pfrule 1360 31 0 21 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 399 0 302 13 1 12 13 0 8 5 art_table 32 400 0 302 2 0 2 2 0 8 1 art_node 16 91 0 73 1 0 1 1 0 8 0 sysvmsgpl 40 56 0 32 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 110 0 100 1 0 1 1 0 8 0 shmpl 112 35 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2254 0 857 89 1 88 89 0 8 0 ffsino 272 2254 0 857 95 1 94 94 0 8 0 nchpl 144 3624 0 2030 60 0 60 60 0 8 0 uvmvnodes 72 2456 0 0 45 0 45 45 0 8 0 vnodes 208 2456 0 0 130 0 130 130 0 8 0 namei 1024 10073 0 10073 3 2 1 1 0 8 1 percpumem 16 38 0 6 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 8 0 6 1 0 1 1 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 200 9981 0 9981 9 8 1 7 0 8 1 plimitpl 152 47 0 39 1 0 1 1 0 8 0 sigapl 424 968 0 916 7 0 7 7 0 8 1 futexpl 56 8738 0 8738 2 1 1 1 0 8 1 knotepl 112 105 0 85 1 0 1 1 0 8 0 kqueuepl 152 69 0 67 1 0 1 1 0 8 0 pipepl 304 154 0 143 3 1 2 2 0 8 0 fdescpl 496 931 0 916 3 0 3 3 0 8 0 filepl 152 5299 0 5196 6 1 5 5 0 8 1 lockfpl 104 162 0 161 1 0 1 1 0 8 0 lockfspl 48 55 0 54 1 0 1 1 0 8 0 sessionpl 120 20 0 9 1 0 1 1 0 8 0 pgrppl 48 24 0 13 1 0 1 1 0 8 0 ucredpl 96 453 0 443 1 0 1 1 0 8 0 zombiepl 144 916 0 916 2 1 1 1 0 8 1 processpl 1008 968 0 916 8 1 7 7 0 8 0 procpl 632 2399 0 2340 7 1 6 6 0 8 0 srpgc 72 4 0 4 2 1 1 1 0 8 1 sosppl 144 6 0 6 2 2 0 1 0 8 0 sockpl 400 1386 0 1367 9 5 4 4 0 8 2 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 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 204 0 0 25 0 25 25 0 8 0 mtagpl 96 15 0 0 1 0 1 1 0 8 0 mbufpl 256 549 0 0 31 0 31 31 0 8 0 bufpl 280 4379 0 128 304 0 304 304 0 8 0 anonpl 16 121646 0 103628 96 20 76 91 0 124 0 amapchunkpl 152 5715 0 5411 33 10 23 26 0 158 10 amappl16 192 4794 0 3928 72 24 48 56 0 8 4 amappl15 184 283 0 281 1 0 1 1 0 8 0 amappl14 176 4 0 1 1 0 1 1 0 8 0 amappl13 168 51 0 48 1 0 1 1 0 8 0 amappl12 160 19 0 17 1 0 1 1 0 8 0 amappl11 152 60 0 45 1 0 1 1 0 8 0 amappl10 144 348 0 340 1 0 1 1 0 8 0 amappl9 136 482 0 480 1 0 1 1 0 8 0 amappl8 128 399 0 361 2 0 2 2 0 8 0 amappl7 120 455 0 442 1 0 1 1 0 8 0 amappl6 112 33 0 25 1 0 1 1 0 8 0 amappl5 104 813 0 798 1 0 1 1 0 8 0 amappl4 96 512 0 487 1 0 1 1 0 8 0 amappl3 88 144 0 135 1 0 1 1 0 8 0 amappl2 80 6604 0 6540 2 0 2 2 0 8 0 amappl1 72 36220 0 35788 23 13 10 18 0 8 0 amappl 80 2721 0 2640 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 37 0 0 1 0 1 1 0 8 0 uaddrrnd 24 935 0 916 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 935 0 916 1 0 1 1 0 8 0 vmmpekpl 168 10202 0 10160 3 0 3 3 0 8 0 vmmpepl 168 127088 0 125113 160 33 127 127 0 357 31 vmsppl 368 934 0 916 2 0 2 2 0 8 0 pdppl 4096 1877 0 1836 8 2 6 6 0 8 0 pvpl 32 348779 0 327638 222 30 192 213 0 265 12 pmappl 232 934 0 916 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 289 0 16 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82785ff0) 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 witness_lock(10,ffff800020e91df0) at witness_lock+0xf sys/kern/subr_witness.c:1110 __mp_acquire_count(ffffffff82933140,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 tsleep(fffffd806e8cbd10,118,ffffffff82471d01,3e) at tsleep+0x19b kqueue_sleep(fffffd806e8cbd10,ffff800020e922d0) at kqueue_sleep+0x101 sys/kern/kern_event.c:885 kqueue_scan(fffffd806e8cbd10,40,c000049638,ffff800020e922d0,ffff800020dd6008,ffff800020e9231c) at kqueue_scan+0x2b6 sys/kern/kern_event.c:928 sys_kevent(ffff800020dd6008,ffff800020e92390,ffff800020e923e0) at sys_kevent+0x464 sys/kern/kern_event.c:640 syscall(ffff800020e92460) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e92460) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc000049e38, count: 4 ddb{0}> trace x86_ipi_db(ffffffff82785ff0) 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 witness_lock(10,ffff800020e91df0) at witness_lock+0xf sys/kern/subr_witness.c:1110 __mp_acquire_count(ffffffff82933140,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 tsleep(fffffd806e8cbd10,118,ffffffff82471d01,3e) at tsleep+0x19b kqueue_sleep(fffffd806e8cbd10,ffff800020e922d0) at kqueue_sleep+0x101 sys/kern/kern_event.c:885 kqueue_scan(fffffd806e8cbd10,40,c000049638,ffff800020e922d0,ffff800020dd6008,ffff800020e9231c) at kqueue_scan+0x2b6 sys/kern/kern_event.c:928 sys_kevent(ffff800020dd6008,ffff800020e92390,ffff800020e923e0) at sys_kevent+0x464 sys/kern/kern_event.c:640 syscall(ffff800020e92460) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e92460) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc000049e38, count: -11 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(ffffffff8240ef1a) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff82933910) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82933910) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82933910,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8063ed6d00,134,4b4,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8063ed6d00,134,4b4,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adb4d0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eae64b8,9,fffffd806a89f200,0,0,ffff8000fffff8c0) at tcp_usrreq+0xa55 sosend(fffffd806eae64b8,0,ffff800020e5fec8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff8c0,4,ffff800020e5fec8,0,ffff800020e5ffb0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff8c0,ffff800020e5ff60,ffff800020e5ffb0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e60030) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e60030) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbc970, count: 3 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240ef1a) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff82933910) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82933910) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82933910,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8063ed6d00,134,4b4,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8063ed6d00,134,4b4,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adb4d0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eae64b8,9,fffffd806a89f200,0,0,ffff8000fffff8c0) at tcp_usrreq+0xa55 sosend(fffffd806eae64b8,0,ffff800020e5fec8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff8c0,4,ffff800020e5fec8,0,ffff800020e5ffb0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff8c0,ffff800020e5ff60,ffff800020e5ffb0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e60030) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e60030) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbc970, count: -12