panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806714a600+16 0x0!=0x81e3c5ad8a18d504 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 376727 21851 0 0x2 0x4000080 0 syz-fuzzer *101739 63207 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(fffffd806714f500,1ac,57c,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806714f500,1ac,57c,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adb280) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eaf3c88,9,fffffd806798d200,0,0,ffff8000fffffb38) at tcp_usrreq+0xa55 sosend(fffffd806eaf3c88,0,ffff800020e04228,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffffb38,4,ffff800020e04228,0,ffff800020e04310) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffffb38,ffff800020e042c0,ffff800020e04310) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e04390) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e04390) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe5b40, 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 0xfffffd806714a600+16 0x0!=0x81e3c5ad8a18d504 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(fffffd806714f500,1ac,57c,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806714f500,1ac,57c,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adb280) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eaf3c88,9,fffffd806798d200,0,0,ffff8000fffffb38) at tcp_usrreq+0xa55 sosend(fffffd806eaf3c88,0,ffff800020e04228,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffffb38,4,ffff800020e04228,0,ffff800020e04310) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffffb38,ffff800020e042c0,ffff800020e04310) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e04390) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e04390) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe5b40, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e03bc0 rbx 0xffff800020e03c70 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff800020e03b80 r9 0xffffffff81c9883f kprintf+0x16f r10 0x1 r11 0xd9b6ae2980ee3fa3 r12 0x3000000008 r13 0xffff800020e03bd0 r14 0x100 r15 0x1 rip 0xffffffff81c6ddc8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e03bb0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (sshd) pid=101739 stat=onproc flags process=12 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffff3d0,0xffff8000ffffe298 process=0xffff8000ffffc3f0 user=0xffff800020dff000, vmspace=0xfffffd806e901738 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 41457 107707 21851 0 2 0x2 syz-executor.1 56797 240094 1 0 3 0x100083 ttyin getty 3619 451036 0 0 3 0x14200 bored sosplice 33957 53365 0 0 3 0x14200 acct acct 60815 243707 21851 0 3 0x82 piperd syz-executor.0 21851 424351 4461 0 3 0x82 thrsleep syz-fuzzer 21851 248018 4461 0 3 0x4000082 nanosleep syz-fuzzer 21851 290524 4461 0 3 0x4000082 thrsleep syz-fuzzer 21851 210578 4461 0 3 0x4000082 thrsleep syz-fuzzer 21851 399903 4461 0 3 0x4000082 thrsleep syz-fuzzer 21851 504035 4461 0 3 0x4000082 thrsleep syz-fuzzer 21851 348557 4461 0 2 0x4000002 syz-fuzzer 21851 376727 4461 0 7 0x4000082 syz-fuzzer 4461 41147 63207 0 3 0x10008a pause ksh *63207 101739 82930 0 7 0x12 sshd 82930 180956 1 0 3 0x80 select sshd 4311 474804 7635 74 3 0x100092 bpf pflogd 7635 358778 1 0 3 0x80 netio pflogd 73310 80275 80195 73 3 0x100090 kqread syslogd 80195 372743 1 0 3 0x100082 netio syslogd 98659 292630 1 77 3 0x100090 poll dhclient 8847 185781 1 0 3 0x80 poll dhclient 90769 298565 0 0 3 0x14200 bored smr 78663 426436 0 0 3 0x14200 pgzero zerothread 65878 417722 0 0 3 0x14200 aiodoned aiodoned 3099 331183 0 0 3 0x14200 syncer update 11925 127757 0 0 3 0x14200 cleaner cleaner 98214 135518 0 0 3 0x14200 reaper reaper 49040 499741 0 0 3 0x14200 pgdaemon pagedaemon 57165 57620 0 0 3 0x14200 bored crynlk 14784 439430 0 0 3 0x14200 bored crypto 88985 441962 0 0 3 0x40014200 acpi0 acpi0 17500 322226 0 0 3 0x40014200 idle1 77574 84110 0 0 3 0x14200 bored softnet 57826 275264 0 0 3 0x14200 bored systqmp 10511 224155 0 0 3 0x14200 bored systq 37917 242384 0 0 3 0x40014200 bored softclock 91777 132992 0 0 3 0x40014200 idle0 1 2699 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex namei r = 0 (0xffffffff828c6808) #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 namei+0xc7 sys/kern/vfs_lookup.c:146 #5 vn_open+0x117 sys/kern/vfs_vnops.c:146 #6 doopenat+0x28b sys/kern/vfs_syscalls.c:1141 #7 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #7 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #8 Xsyscall+0x128 Process 41457 (syz-executor.1) thread 0xffff800020eb6ef0 (107707) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828c5c88) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:570 #2 Xsyscall+0x128 Process 63207 (sshd) thread 0xffff8000fffffb38 (101739) 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 9510 6413K 6664K 78643K 11060 0 pcb 13 8K 8K 78643K 61 0 rtable 81 4K 6K 78643K 434 0 ifaddr 68 13K 14K 78643K 141 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 49 0 ioctlops 0 0K 4K 78643K 1555 0 iov 0 0K 34K 78643K 278 0 mount 1 1K 1K 78643K 1 0 vnodes 1233 78K 78K 78643K 1483 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 10 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 141 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 4 9K 25K 78643K 445 0 sigio 0 0K 0K 78643K 2 0 proc 62 63K 95K 78643K 589 0 subproc 32 2K 3K 78643K 153 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 607 0 in_multi 41 2K 3K 78643K 101 0 ether_multi 1 0K 0K 78643K 12 0 mrt 0 0K 0K 78643K 1 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 269 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 201 112K 113K 78643K 2377 0 UVM aobj 14 2K 2K 78643K 16 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 36 0 NDP 12 0K 0K 78643K 24 0 temp 136 3882K 3946K 78643K 4346 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 8 0 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 88 29 0 27 1 0 1 1 0 8 0 rtentry 112 73 0 45 2 0 2 2 0 8 0 unpcb 120 112 0 102 1 0 1 1 0 8 0 syncache 272 4 0 4 1 1 0 1 0 8 0 tcpqe 32 758 0 758 1 1 0 1 0 8 0 tcpcb 592 106 0 98 1 0 1 1 0 8 0 inpcb 296 631 0 624 5 3 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 16 0 12 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 pffrag 232 8 0 7 1 0 1 1 0 482 0 pffrnode 88 8 0 7 1 0 1 1 0 8 0 pffrent 40 106 0 105 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 52 0 50 3 2 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 45 0 24 1 0 1 1 0 8 0 pfstkey 112 45 0 24 1 0 1 1 0 8 0 pfstate 328 45 0 24 3 0 3 3 0 8 0 pfrule 1360 35 0 28 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 347 0 201 13 3 10 12 0 8 0 art_table 32 348 0 201 2 0 2 2 0 8 0 art_node 16 72 0 49 1 0 1 1 0 8 0 sysvmsgpl 40 72 0 32 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 132 0 122 1 0 1 1 0 8 0 shmpl 112 13 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1887 0 480 89 0 89 89 0 8 0 ffsino 272 1887 0 480 96 1 95 95 0 8 0 nchpl 144 2873 0 1286 60 0 60 60 0 8 0 uvmvnodes 72 2166 0 0 40 0 40 40 0 8 0 vnodes 208 2166 0 0 114 0 114 114 0 8 0 namei 1024 7919 0 7919 3 2 1 1 0 8 1 percpumem 16 35 0 3 1 0 1 1 0 8 0 vcpupl 1984 7 0 0 1 0 1 1 0 8 0 vmpool 560 7 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 14 0 12 3 2 1 1 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 200 7683 0 7683 11 10 1 7 0 8 1 plimitpl 152 46 0 38 1 0 1 1 0 8 0 sigapl 424 642 0 610 4 0 4 4 0 8 0 futexpl 56 6740 0 6740 2 1 1 1 0 8 1 knotepl 112 160 0 140 1 0 1 1 0 8 0 kqueuepl 152 37 0 35 1 0 1 1 0 8 0 pipepl 304 140 0 129 4 2 2 2 0 8 1 fdescpl 496 625 0 610 3 0 3 3 0 8 0 filepl 152 3604 0 3502 6 1 5 5 0 8 0 lockfpl 104 122 0 121 1 0 1 1 0 8 0 lockfspl 48 44 0 43 1 0 1 1 0 8 0 sessionpl 120 26 0 15 1 0 1 1 0 8 0 pgrppl 48 40 0 29 1 0 1 1 0 8 0 ucredpl 96 337 0 327 1 0 1 1 0 8 0 zombiepl 144 610 0 610 3 2 1 1 0 8 1 processpl 1008 642 0 610 6 1 5 5 0 8 0 procpl 632 1409 0 1370 5 1 4 4 0 8 0 srpgc 72 2 0 2 1 0 1 1 0 8 1 sosppl 144 3 0 3 2 2 0 1 0 8 0 sockpl 400 776 0 757 7 4 3 4 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 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 195 0 0 24 0 24 24 0 8 0 mtagpl 96 34 0 0 1 0 1 1 0 8 0 mbufpl 256 478 0 0 28 0 28 28 0 8 0 bufpl 280 3882 0 126 269 0 269 269 0 8 0 anonpl 16 81505 0 64110 96 17 79 83 0 124 4 amapchunkpl 152 3800 0 3490 21 3 18 18 0 158 3 amappl16 192 2395 0 1552 48 5 43 47 0 8 0 amappl15 184 259 0 259 2 2 0 1 0 8 0 amappl14 176 93 0 89 1 0 1 1 0 8 0 amappl13 168 52 0 48 1 0 1 1 0 8 0 amappl12 160 33 0 27 1 0 1 1 0 8 0 amappl11 152 144 0 128 1 0 1 1 0 8 0 amappl10 144 277 0 274 1 0 1 1 0 8 0 amappl9 136 391 0 389 1 0 1 1 0 8 0 amappl8 128 451 0 391 3 0 3 3 0 8 0 amappl7 120 389 0 376 1 0 1 1 0 8 0 amappl6 112 36 0 29 1 0 1 1 0 8 0 amappl5 104 434 0 417 1 0 1 1 0 8 0 amappl4 96 608 0 578 1 0 1 1 0 8 0 amappl3 88 215 0 206 1 0 1 1 0 8 0 amappl2 80 3882 0 3817 2 0 2 2 0 8 0 amappl1 72 26740 0 26317 23 13 10 18 0 8 0 amappl 80 1770 0 1673 3 0 3 3 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 15 0 2 1 0 1 1 0 8 0 uaddrrnd 24 632 0 610 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 632 0 610 1 0 1 1 0 8 0 vmmpekpl 168 8733 0 8701 2 0 2 2 0 8 0 vmmpepl 168 91728 0 89742 179 52 127 134 0 357 34 vmsppl 368 631 0 610 4 1 3 3 0 8 1 pdppl 4096 1271 0 1227 8 2 6 7 0 8 0 pvpl 32 259202 0 238742 216 29 187 195 0 265 11 pmappl 232 631 0 610 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 285 0 17 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(ffffffff828c5a80,2) 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(ffff800020ea0870,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800020ea0870,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800020ea0870,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(fffffd806e8ddda8,118,ffffffff82468835,1b) at tsleep+0x1cc sys/kern/kern_synch.c:155 kqueue_sleep(fffffd806e8ddda8,ffff800020ea0d00) at kqueue_sleep+0x101 sys/kern/kern_event.c:885 kqueue_scan(fffffd806e8ddda8,40,c000209638,ffff800020ea0d00,ffff800020dd6770,ffff800020ea0d4c) at kqueue_scan+0x2b6 sys/kern/kern_event.c:928 sys_kevent(ffff800020dd6770,ffff800020ea0dc0,ffff800020ea0e10) at sys_kevent+0x464 sys/kern/kern_event.c:640 syscall(ffff800020ea0e90) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ea0e90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc000209e38, count: 1 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(ffffffff828c5a80,2) 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(ffff800020ea0870,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800020ea0870,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800020ea0870,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(fffffd806e8ddda8,118,ffffffff82468835,1b) at tsleep+0x1cc sys/kern/kern_synch.c:155 kqueue_sleep(fffffd806e8ddda8,ffff800020ea0d00) at kqueue_sleep+0x101 sys/kern/kern_event.c:885 kqueue_scan(fffffd806e8ddda8,40,c000209638,ffff800020ea0d00,ffff800020dd6770,ffff800020ea0d4c) at kqueue_scan+0x2b6 sys/kern/kern_event.c:928 sys_kevent(ffff800020dd6770,ffff800020ea0dc0,ffff800020ea0e10) at sys_kevent+0x464 sys/kern/kern_event.c:640 syscall(ffff800020ea0e90) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ea0e90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc000209e38, count: -14 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(fffffd806714f500,1ac,57c,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806714f500,1ac,57c,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adb280) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eaf3c88,9,fffffd806798d200,0,0,ffff8000fffffb38) at tcp_usrreq+0xa55 sosend(fffffd806eaf3c88,0,ffff800020e04228,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffffb38,4,ffff800020e04228,0,ffff800020e04310) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffffb38,ffff800020e042c0,ffff800020e04310) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e04390) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e04390) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe5b40, 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(fffffd806714f500,1ac,57c,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806714f500,1ac,57c,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adb280) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eaf3c88,9,fffffd806798d200,0,0,ffff8000fffffb38) at tcp_usrreq+0xa55 sosend(fffffd806eaf3c88,0,ffff800020e04228,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffffb38,4,ffff800020e04228,0,ffff800020e04310) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffffb38,ffff800020e042c0,ffff800020e04310) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e04390) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e04390) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe5b40, count: -12