panic: pool_do_get: mbufpl free list modified: page 0xfffffd806d82f000; item addr 0xfffffd806d82ff00; offset 0x0=0x0 != 0x54510fe30fe56fbf Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *429402 87211 0 0x12 0 1 sshd 405018 80268 0 0x14000 0x200 0 softnet db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8249915b) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff828c6318,2,ffff800020e040e8) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff828c6318,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000adb720) at tcp_output+0x14e6 tcp_usrreq(fffffd806eaf1968,9,fffffd806f2d4c00,0,0,ffff8000fffff8c0) at tcp_usrreq+0xa55 sosend(fffffd806eaf1968,0,ffff800020e04568,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff8c0,4,ffff800020e04568,0,ffff800020e04650) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff8c0,ffff800020e04600,ffff800020e04650) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e046d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e046d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe6a00, 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_do_get: mbufpl free list modified: page 0xfffffd806d82f000; item addr 0xfffffd806d82ff00; offset 0x0=0x0 != 0x54510fe30fe56fbf ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8249915b) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff828c6318,2,ffff800020e040e8) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff828c6318,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000adb720) at tcp_output+0x14e6 tcp_usrreq(fffffd806eaf1968,9,fffffd806f2d4c00,0,0,ffff8000fffff8c0) at tcp_usrreq+0xa55 sosend(fffffd806eaf1968,0,ffff800020e04568,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff8c0,4,ffff800020e04568,0,ffff800020e04650) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff8c0,ffff800020e04600,ffff800020e04650) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e046d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e046d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe6a00, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e03f30 rbx 0xffff800020e03fe0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff800020e03ef0 r9 0xffffffff82193d9f kprintf+0x16f r10 0x1 r11 0x6dddc33b6d384741 r12 0x3000000008 r13 0xffff800020e03f40 r14 0x100 r15 0x1 rip 0xffffffff820d5aa8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e03f20 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (sshd) pid=429402 stat=onproc flags process=12 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe010,0xffff8000ffffea00 process=0xffff8000ffffc7e0 user=0xffff800020dff000, vmspace=0xfffffd806e90e8a8 estcpu=0, cpticks=3, pctcpu=0.3 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 54921 132856 0 0 3 0x14200 acct acct 15794 189224 0 0 3 0x14200 bored sosplice 56244 176261 59393 0 2 0x2 syz-executor.1 40434 237997 59393 0 2 0x2 syz-executor.0 59393 344296 29827 0 2 0x2 syz-fuzzer 59393 40090 29827 0 3 0x4000082 nanosleep syz-fuzzer 59393 466438 29827 0 2 0x4000002 syz-fuzzer 59393 250315 29827 0 3 0x4000082 thrsleep syz-fuzzer 59393 500329 29827 0 3 0x4000082 thrsleep syz-fuzzer 59393 500024 29827 0 3 0x4000082 thrsleep syz-fuzzer 59393 301919 29827 0 3 0x4000082 thrsleep syz-fuzzer 59393 54178 29827 0 3 0x4000082 thrsleep syz-fuzzer 29827 266125 87211 0 3 0x10008a pause ksh *87211 429402 94187 0 7 0x12 sshd 73816 139340 1 0 3 0x100083 ttyin getty 94187 201273 1 0 3 0x80 select sshd 69992 370898 64770 74 3 0x100092 bpf pflogd 64770 225493 1 0 3 0x80 netio pflogd 22460 91830 62863 73 3 0x100090 kqread syslogd 62863 486911 1 0 3 0x100082 netio syslogd 46219 348029 1 77 3 0x100090 poll dhclient 69485 268515 1 0 3 0x80 poll dhclient 85169 84856 0 0 3 0x14200 bored smr 68877 149794 0 0 3 0x14200 pgzero zerothread 66137 176193 0 0 3 0x14200 aiodoned aiodoned 51219 518585 0 0 3 0x14200 syncer update 82225 450629 0 0 3 0x14200 cleaner cleaner 96674 105537 0 0 3 0x14200 reaper reaper 95609 17677 0 0 3 0x14200 pgdaemon pagedaemon 68722 356074 0 0 3 0x14200 bored crynlk 57925 493138 0 0 3 0x14200 bored crypto 74744 284403 0 0 3 0x40014200 acpi0 acpi0 16346 516932 0 0 3 0x40014200 idle1 80268 405018 0 0 7 0x14200 softnet 30623 98495 0 0 3 0x14200 bored systqmp 47349 280933 0 0 3 0x14200 bored systq 62450 146257 0 0 3 0x40014200 bored softclock 98802 8856 0 0 3 0x40014200 idle0 1 29144 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex mbufpl r = 0 (0xffffffff828c6328) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:578 #4 m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 #5 tcp_output+0x14e6 #6 tcp_usrreq+0xa55 #7 sosend+0x671 sys/kern/uipc_socket.c:555 #8 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #9 sys_write+0x83 sys/kern/sys_generic.c:285 #10 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #11 Xsyscall+0x128 Process 87211 (sshd) thread 0xffff8000fffff8c0 (429402) exclusive rwlock netlock r = 0 (0xffffffff82795a50) #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 exclusive mutex mbufpl r = 0 (0xffffffff828c6328) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:578 #4 m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 #5 tcp_output+0x14e6 #6 tcp_usrreq+0xa55 #7 sosend+0x671 sys/kern/uipc_socket.c:555 #8 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #9 sys_write+0x83 sys/kern/sys_generic.c:285 #10 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #11 Xsyscall+0x128 Process 80268 (softnet) thread 0xffff800020d88278 (405018) shared rwlock softnet r = 0 (0xffff80000002c070) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 taskq_thread+0xdf sys/kern/kern_task.c:445 #2 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9558 6743K 7561K 78643K 12080 0 pcb 13 8K 8K 78643K 71 0 rtable 142 19K 20K 78643K 405 0 ifaddr 98 19K 19K 78643K 165 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 55 0 ioctlops 0 0K 4K 78643K 1540 0 iov 0 0K 16K 78643K 52 0 mount 1 1K 1K 78643K 1 0 vnodes 1231 77K 78K 78643K 1610 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 7 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 106 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 4 9K 25K 78643K 435 0 sigio 0 0K 0K 78643K 16 0 proc 61 63K 95K 78643K 459 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 266 0 in_multi 64 3K 3K 78643K 170 0 ether_multi 1 0K 0K 78643K 5 0 mrt 0 0K 0K 78643K 3 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 227 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 185 46K 46K 78643K 2396 0 UVM aobj 22 2K 2K 78643K 22 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 28 0 NDP 14 0K 0K 78643K 35 0 temp 118 3867K 3931K 78643K 4267 0 kqueue 3 4K 8K 78643K 16 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 39 0 37 1 0 1 1 0 8 0 rtentry 112 80 0 36 2 0 2 2 0 8 0 unpcb 120 251 0 241 1 0 1 1 0 8 0 syncache 272 12 0 12 2 1 1 1 0 8 1 tcpqe 32 414 0 414 2 1 1 1 0 8 1 tcpcb 592 266 0 260 4 1 3 3 0 8 2 inpcb 296 578 0 570 2 0 2 2 0 8 1 rttmr 72 2 0 2 1 0 1 1 0 8 1 nd6 48 26 0 22 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 1 0 1 0 8 0 ppxss 1136 1 0 1 1 0 1 1 0 8 1 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 2 0 2 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 20 0 6 2 0 2 2 0 8 0 pftag 88 2 0 2 1 0 1 1 0 8 1 pfstitem 24 27 0 4 1 0 1 1 0 8 0 pfstkey 112 27 0 4 1 0 1 1 0 8 0 pfstate 328 27 0 4 3 0 3 3 0 8 0 pfrule 1360 32 0 21 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 321 0 142 17 0 17 17 0 8 4 art_table 32 322 0 142 3 0 3 3 0 8 0 art_node 16 79 0 39 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 8 1 0 1 1 0 8 0 semapl 112 104 0 94 1 0 1 1 0 8 0 shmpl 112 19 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1957 0 555 89 1 88 89 0 8 0 ffsino 272 1957 0 555 95 1 94 94 0 8 0 nchpl 144 2819 0 1224 60 0 60 60 0 8 0 uvmvnodes 72 2337 0 0 43 0 43 43 0 8 0 vnodes 208 2337 0 0 123 0 123 123 0 8 0 namei 1024 7799 0 7799 2 1 1 1 0 8 1 percpumem 16 38 0 6 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 10 0 0 1 0 1 1 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 200 8161 0 8161 8 7 1 7 0 8 1 plimitpl 152 35 0 27 1 0 1 1 0 8 0 sigapl 424 652 0 620 4 0 4 4 0 8 0 futexpl 56 5914 0 5914 1 0 1 1 0 8 1 knotepl 112 77 0 57 1 0 1 1 0 8 0 kqueuepl 152 52 0 50 1 0 1 1 0 8 0 pipepl 304 133 0 122 2 0 2 2 0 8 1 fdescpl 496 635 0 620 5 2 3 3 0 8 0 filepl 152 3797 0 3695 7 2 5 6 0 8 1 lockfpl 104 95 0 94 1 0 1 1 0 8 0 lockfspl 48 38 0 37 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 96 302 0 293 1 0 1 1 0 8 0 zombiepl 144 620 0 620 2 1 1 1 0 8 1 processpl 1008 652 0 620 6 1 5 5 0 8 0 procpl 632 1553 0 1514 5 1 4 4 0 8 0 sosppl 144 7 0 7 2 1 1 1 0 8 1 sockpl 400 880 0 861 6 3 3 5 0 8 1 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 248 0 0 30 0 30 30 0 8 0 mtagpl 96 32 0 0 1 0 1 1 0 8 0 mbufpl 256 267 0 0 16 0 16 16 0 8 0 mbufpl: pool(0xffffffff828c6318:mbufpl): free list modified: page 0xfffffd806d82f000; item ordinal 0; addr 0xfffffd806d82ff00 (p 0xfffffd806d9b8000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd806d82f000; item ordinal 0; addr 0xfffffd806d82ff00 (p 0xfffffd806d9b8000); offset 0x0=0x0 mbufpl: pool(0xffffffff828c6318:mbufpl): page inconsistency: page 0xfffffd806d82f000; item ordinal 1; addr 0xd9ec4a789610efe1 bufpl 280 4039 0 130 280 0 280 280 0 8 0 anonpl 16 71302 0 52939 77 1 76 76 0 124 1 amapchunkpl 152 3631 0 3306 15 1 14 15 0 158 0 amappl16 192 2479 0 1653 43 0 43 43 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 4 0 1 2 1 1 1 0 8 0 amappl13 168 223 0 219 1 0 1 1 0 8 0 amappl12 160 215 0 211 1 0 1 1 0 8 0 amappl11 152 54 0 37 1 0 1 1 0 8 0 amappl10 144 16 0 13 1 0 1 1 0 8 0 amappl9 136 574 0 572 1 0 1 1 0 8 0 amappl8 128 399 0 336 3 0 3 3 0 8 0 amappl7 120 116 0 103 1 0 1 1 0 8 0 amappl6 112 38 0 29 1 0 1 1 0 8 0 amappl5 104 536 0 520 1 0 1 1 0 8 0 amappl4 96 486 0 461 1 0 1 1 0 8 0 amappl3 88 136 0 127 1 0 1 1 0 8 0 amappl2 80 4336 0 4272 2 0 2 2 0 8 0 amappl1 72 27917 0 27493 23 13 10 18 0 8 0 amappl 80 1847 0 1764 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 0 1 0 1 1 0 8 0 uaddrrnd 24 636 0 620 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 636 0 620 1 0 1 1 0 8 0 vmmpekpl 168 9000 0 8966 2 0 2 2 0 8 0 vmmpepl 168 87930 0 85976 120 16 104 117 0 357 11 vmsppl 368 635 0 620 2 0 2 2 0 8 0 pdppl 4096 1279 0 1241 7 1 6 6 0 8 0 pvpl 32 239182 0 217735 186 0 186 186 0 265 10 pmappl 232 635 0 620 3 1 2 2 0 8 1 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 278 0 11 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff827a7ff0) 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_acquire_count(ffffffff828d0690,0) at __mp_acquire_count+0x2d sys/kern/kern_lock.c:227 msleep(ffff80000002c000,ffff80000002c018,20,ffffffff8243b747,0) at msleep+0x1a9 taskq_next_work(ffff80000002c000,ffff800020da9250) at taskq_next_work+0x8d sys/kern/kern_task.c:402 taskq_thread(ffff80000002c000) at taskq_thread+0x155 sys/kern/kern_task.c:442 end trace frame: 0x0, count: 8 ddb{0}> trace x86_ipi_db(ffffffff827a7ff0) 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_acquire_count(ffffffff828d0690,0) at __mp_acquire_count+0x2d sys/kern/kern_lock.c:227 msleep(ffff80000002c000,ffff80000002c018,20,ffffffff8243b747,0) at msleep+0x1a9 taskq_next_work(ffff80000002c000,ffff800020da9250) at taskq_next_work+0x8d sys/kern/kern_task.c:402 taskq_thread(ffff80000002c000) at taskq_thread+0x155 sys/kern/kern_task.c:442 end trace frame: 0x0, count: -7 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(ffffffff8249915b) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff828c6318,2,ffff800020e040e8) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff828c6318,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000adb720) at tcp_output+0x14e6 tcp_usrreq(fffffd806eaf1968,9,fffffd806f2d4c00,0,0,ffff8000fffff8c0) at tcp_usrreq+0xa55 sosend(fffffd806eaf1968,0,ffff800020e04568,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff8c0,4,ffff800020e04568,0,ffff800020e04650) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff8c0,ffff800020e04600,ffff800020e04650) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e046d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e046d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe6a00, count: 3 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8249915b) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff828c6318,2,ffff800020e040e8) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff828c6318,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000adb720) at tcp_output+0x14e6 tcp_usrreq(fffffd806eaf1968,9,fffffd806f2d4c00,0,0,ffff8000fffff8c0) at tcp_usrreq+0xa55 sosend(fffffd806eaf1968,0,ffff800020e04568,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff8c0,4,ffff800020e04568,0,ffff800020e04650) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff8c0,ffff800020e04600,ffff800020e04650) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e046d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e046d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe6a00, count: -12