panic(ffffffff821fefa6) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82656440) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82656440) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82656440,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000a0b980) at tcp_output+0x14e6 tcp_usrreq(fffffd806eb4fc88,9,fffffd8063992100,0,0,ffff800020ede9d0) at tcp_usrreq+0xa55 sosend(fffffd806eb4fc88,0,ffff800020ecfda8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ede9d0,4,ffff800020ecfda8,0,ffff800020ecfe90) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ede9d0,ffff800020ecfe40,ffff800020ecfe90) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020ecff10) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ecff10) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcae40, 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 0xfffffd8063995000+24 0xb22676559f98adc6!=0xb22676d5e8ffc7c6 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821fefa6) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82656440) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82656440) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82656440,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000a0b980) at tcp_output+0x14e6 tcp_usrreq(fffffd806eb4fc88,9,fffffd8063992100,0,0,ffff800020ede9d0) at tcp_usrreq+0xa55 sosend(fffffd806eb4fc88,0,ffff800020ecfda8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ede9d0,4,ffff800020ecfda8,0,ffff800020ecfe90) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ede9d0,ffff800020ecfe40,ffff800020ecfe90) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020ecff10) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ecff10) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcae40, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020ecf7a0 rbx 0xffff800020ecf850 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff812e663f kprintf+0x16f r9 0x1 r10 0x2 r11 0xdf774b621731889b r12 0x3000000008 r13 0xffff800020ecf7b0 r14 0x100 r15 0x1 rip 0xffffffff821c8118 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020ecf790 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (sshd) pid=406670 stat=onproc flags process=12 proc=0 pri=50, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020ede760,0xffff800020edf130 process=0xffff800020ec8ba0 user=0xffff800020eca000, vmspace=0xfffffd806e9638a8 estcpu=1, cpticks=3, pctcpu=4.44 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 73793 248233 53247 0 2 0 syz-executor.0 73793 425590 53247 0 7 0x4000000 syz-executor.0 76751 236254 0 0 3 0x14280 nfsidl nfsio 42152 13045 0 0 3 0x14280 nfsidl nfsio 81333 373635 0 0 3 0x14280 nfsidl nfsio 44676 127438 0 0 3 0x14280 nfsidl nfsio 92885 289304 0 0 3 0x14280 nfsidl nfsio 65162 153363 0 0 3 0x14280 nfsidl nfsio 53639 165429 0 0 3 0x14280 nfsidl nfsio 67514 264802 0 0 3 0x14280 nfsidl nfsio 10583 431267 0 0 3 0x14280 nfsidl nfsio 53072 279442 0 0 3 0x14280 nfsidl nfsio 99237 157772 0 0 3 0x14280 nfsidl nfsio 99834 454813 0 0 3 0x14280 nfsidl nfsio 5056 79637 0 0 3 0x14280 nfsidl nfsio 33907 460339 0 0 3 0x14280 nfsidl nfsio 3184 467632 0 0 3 0x14280 nfsidl nfsio 28433 40605 0 0 3 0x14280 nfsidl nfsio 50944 2243 0 0 3 0x14280 nfsidl nfsio 43179 98613 0 0 3 0x14280 nfsidl nfsio 39304 8217 0 0 3 0x14280 nfsidl nfsio 15647 380087 0 0 3 0x14280 nfsidl nfsio 14711 38240 42704 0 2 0x2 syz-executor.1 53247 129862 42704 0 2 0x482 syz-executor.0 55605 47129 0 0 3 0x14200 bored sosplice 42704 517201 10423 0 3 0x82 thrsleep syz-fuzzer 42704 414987 10423 0 2 0x4000482 syz-fuzzer 42704 263259 10423 0 3 0x4000082 kqread syz-fuzzer 42704 465422 10423 0 3 0x4000082 thrsleep syz-fuzzer 42704 22458 10423 0 3 0x4000082 thrsleep syz-fuzzer 42704 363476 10423 0 3 0x4000082 thrsleep syz-fuzzer 42704 48282 10423 0 2 0x4000482 syz-fuzzer 42704 310152 10423 0 3 0x4000082 thrsleep syz-fuzzer 42704 412234 10423 0 3 0x4000082 thrsleep syz-fuzzer 42704 503857 10423 0 3 0x4000082 thrsleep syz-fuzzer 10423 178507 8617 0 3 0x10008a pause ksh * 8617 406670 40018 0 7 0x12 sshd 81675 125408 1 0 3 0x100083 ttyin getty 40018 52695 1 0 3 0x80 select sshd 55403 454578 34910 74 3 0x100092 bpf pflogd 34910 287875 1 0 3 0x80 netio pflogd 76147 223823 49130 73 3 0x100090 kqread syslogd 49130 518455 1 0 3 0x100082 netio syslogd 44405 460169 1 77 3 0x100090 poll dhclient 21858 99672 1 0 3 0x80 poll dhclient 12130 325437 0 0 3 0x14200 bored smr 68719 156666 0 0 2 0x14200 zerothread 53669 266820 0 0 3 0x14200 aiodoned aiodoned 10361 416653 0 0 3 0x14200 syncer update 48474 518932 0 0 3 0x14200 cleaner cleaner 78897 355396 0 0 3 0x14200 reaper reaper 12910 405710 0 0 3 0x14200 pgdaemon pagedaemon 13215 317643 0 0 3 0x14200 bored crynlk 43909 499644 0 0 3 0x14200 bored crypto 55133 342330 0 0 3 0x40014200 acpi0 acpi0 98413 201966 0 0 3 0x40014200 idle1 24074 151762 0 0 3 0x14200 bored softnet 14300 392668 0 0 3 0x14200 bored systqmp 12799 353777 0 0 3 0x14200 bored systq 42110 465022 0 0 2 0x40014200 softclock 38585 243478 0 0 3 0x40014200 idle0 1 100534 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 14711 (syz-executor.1) thread 0xffff800020e924f8 (38240) exclusive rrwlock inode r = 0 (0xfffffd806e3084e0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vget+0x1c8 sys/kern/vfs_subr.c:671 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329 #8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8068da7d60) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 Process 42704 (syz-fuzzer) thread 0xffff800020edf870 (22458) shared rwlock vmmaplk r = 0 (0xfffffd806e963a30) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 uvm_map_inentry_fix+0xa3 vm_map_lock_read_ln sys/uvm/uvm_map.c:5467 [inline] #1 uvm_map_inentry_fix+0xa3 sys/uvm/uvm_map.c:1858 #2 uvm_map_inentry+0xd2 sys/uvm/uvm_map.c:1890 #3 syscall+0x397 mi_syscall sys/sys/syscall_mi.h:81 [inline] #3 syscall+0x397 sys/arch/amd64/amd64/trap.c:570 #4 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82641ae8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 uvm_map_inentry+0xbe sys/uvm/uvm_map.c:1890 #2 syscall+0x397 mi_syscall sys/sys/syscall_mi.h:81 [inline] #2 syscall+0x397 sys/arch/amd64/amd64/trap.c:570 #3 Xsyscall+0x128 Process 8617 (sshd) thread 0xffff800020ede9d0 (406670) exclusive rwlock netlock r = 0 (0xffffffff82538ad8) #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:537 #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 9540 6432K 7070K 78643K 12080 0 pcb 13 8K 8K 78643K 241 0 rtable 72 3K 4K 78643K 676 0 ifaddr 79 14K 18K 78643K 251 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 91 0 ioctlops 0 0K 4K 78643K 1575 0 iov 0 0K 24K 78643K 214 0 mount 1 1K 1K 78643K 1 0 vnodes 1224 77K 77K 78643K 1825 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 23 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 225 0 dirhash 9 1K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 1362 0 sigio 0 0K 0K 78643K 17 0 proc 63 63K 83K 78643K 721 0 subproc 32 2K 2K 78643K 102 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 100 0 in_multi 83 4K 4K 78643K 261 0 ether_multi 1 0K 0K 78643K 35 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 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 331 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 160 146K 162K 78643K 5328 0 UVM aobj 36 2K 2K 78643K 44 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 179 0 NDP 15 0K 0K 78643K 60 0 temp 144 3047K 3135K 78643K 44483 0 kqueue 3 4K 16K 78643K 60 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 19 0 17 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 121 0 119 1 0 1 1 0 8 0 rtentry 112 139 0 116 2 0 2 2 0 8 0 unpcb 120 648 0 637 1 0 1 1 0 8 0 syncache 264 10 0 10 4 4 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 656 0 656 1 1 0 1 0 8 0 tcpcb 544 449 0 445 1 0 1 1 0 8 0 inpcb 280 1346 0 1339 7 5 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 28 0 28 1 0 1 1 0 8 1 pkpcb 40 6 0 6 2 1 1 1 0 8 1 swfcl 56 4 0 0 1 0 1 1 0 8 0 ppxss 1128 3 0 3 3 2 1 1 0 8 1 pfstscr 40 6 0 5 1 0 1 1 0 8 0 pffrag 232 3 0 3 2 2 0 1 0 482 0 pffrnode 88 3 0 3 2 2 0 1 0 8 0 pffrent 40 11 0 11 3 2 1 1 0 8 1 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 101 0 68 1 0 1 1 0 8 0 pfstkey 112 103 0 70 2 0 2 2 0 8 0 pfstate 328 99 0 67 4 0 4 4 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 613 0 510 16 4 12 13 0 8 3 art_table 32 615 0 510 2 0 2 2 0 8 0 art_node 16 136 0 115 1 0 1 1 0 8 0 sysvmsgpl 40 52 0 33 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 223 0 213 1 0 1 1 0 8 0 shmpl 112 42 0 8 1 0 1 1 0 8 0 dirhash 1024 17 0 10 3 1 2 3 0 8 0 dino2pl 256 3759 0 2354 89 0 89 89 0 8 0 ffsino 272 3759 0 2354 96 2 94 95 0 8 0 nchpl 144 6264 0 4672 60 0 60 60 0 8 0 uvmvnodes 72 4210 0 0 77 0 77 77 0 8 0 vnodes 208 4210 0 0 222 0 222 222 0 8 0 namei 1024 18355 0 18355 5 4 1 1 0 8 1 percpumem 16 56 0 24 1 0 1 1 0 8 0 vcpupl 1984 12 0 0 2 0 2 2 0 8 0 vmpool 560 20 0 8 1 0 1 1 0 8 0 scxspl 192 17824 0 17824 16 15 1 7 0 8 1 plimitpl 152 95 0 87 1 0 1 1 0 8 0 sigapl 424 1586 0 1534 6 0 6 6 0 8 0 futexpl 56 21868 0 21868 4 3 1 1 0 8 1 knotepl 112 201 0 182 2 0 2 2 0 8 1 kqueuepl 144 210 0 206 1 0 1 1 0 8 0 pipelkpl 48 322 0 312 1 0 1 1 0 8 0 pipepl 120 644 0 625 4 3 1 2 0 8 0 fdescpl 496 1550 0 1534 3 0 3 3 0 8 0 filepl 152 10274 0 10174 12 7 5 7 0 8 0 lockfpl 104 274 0 273 1 0 1 1 0 8 0 lockfspl 48 113 0 112 1 0 1 1 0 8 0 sessionpl 112 22 0 11 1 0 1 1 0 8 0 pgrppl 48 36 0 25 1 0 1 1 0 8 0 ucredpl 96 1114 0 1105 1 0 1 1 0 8 0 zombiepl 144 1534 0 1534 5 4 1 1 0 8 1 processpl 984 1586 0 1534 8 1 7 7 0 8 0 procpl 624 4293 0 4231 6 0 6 6 0 8 0 sosppl 128 17 0 17 6 5 1 1 0 8 1 sockpl 400 2135 0 2115 12 8 4 5 0 8 1 mcl64k 65536 512 0 0 64 8 56 64 0 8 1 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 12 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 176 0 0 21 1 20 21 0 8 0 mtagpl 80 74 0 0 2 0 2 2 0 8 0 mbufpl 256 683 0 0 41 0 41 41 0 8 0 bufpl 280 6827 0 583 447 0 447 447 0 8 0 anonpl 16 165935 0 150492 96 32 64 78 0 124 0 amapchunkpl 152 9744 0 9601 47 40 7 20 0 158 0 amappl16 192 7249 0 6396 64 20 44 54 0 8 1 amappl15 184 484 0 480 1 0 1 1 0 8 0 amappl14 176 31 0 27 1 0 1 1 0 8 0 amappl13 168 65 0 62 1 0 1 1 0 8 0 amappl12 160 13 0 11 1 0 1 1 0 8 0 amappl11 152 493 0 475 1 0 1 1 0 8 0 amappl10 144 344 0 338 1 0 1 1 0 8 0 amappl9 136 476 0 475 1 0 1 1 0 8 0 amappl8 128 781 0 724 2 0 2 2 0 8 0 amappl7 120 466 0 453 1 0 1 1 0 8 0 amappl6 112 457 0 450 1 0 1 1 0 8 0 amappl5 104 1555 0 1540 1 0 1 1 0 8 0 amappl4 96 797 0 764 1 0 1 1 0 8 0 amappl3 88 186 0 180 1 0 1 1 0 8 0 amappl2 80 11435 0 11364 2 0 2 2 0 8 0 amappl1 72 42209 0 41770 23 13 10 18 0 8 0 amappl 80 4605 0 4555 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 43 0 8 1 0 1 1 0 8 0 uaddrrnd 24 1570 0 1542 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1570 0 1542 1 0 1 1 0 8 0 vmmpekpl 168 14651 0 14614 2 0 2 2 0 8 0 vmmpepl 168 195974 0 193912 192 84 108 128 0 357 13 vmsppl 368 1569 0 1542 3 0 3 3 0 8 0 pdppl 4096 3148 0 3096 8 1 7 8 0 8 0 pvpl 32 467246 0 448815 223 59 164 187 0 265 12 pmappl 232 1569 0 1542 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 375 0 32 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff824cbff0) 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 x86_bus_space_io_write_1(3f8,0,65) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,65) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,65) at comcnputc+0x131 sys/dev/ic/com.c:1254 cnputc(65) at cnputc+0x4c sys/dev/cons.c:239 kputchar(65,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700 panic(ffffffff821fc071) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821fc071) at panic+0xf3 sys/kern/subr_prf.c:197 __assert(ffffffff82255ae4,ffffffff822420a8,29e,ffffffff82226378) at __assert+0x2b sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff824cbff0) 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 x86_bus_space_io_write_1(3f8,0,65) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,65) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,65) at comcnputc+0x131 sys/dev/ic/com.c:1254 cnputc(65) at cnputc+0x4c sys/dev/cons.c:239 kputchar(65,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700 panic(ffffffff821fc071) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821fc071) at panic+0xf3 sys/kern/subr_prf.c:197 __assert(ffffffff82255ae4,ffffffff822420a8,29e,ffffffff82226378) at __assert+0x2b sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, 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(ffffffff821fefa6) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82656440) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82656440) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82656440,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000a0b980) at tcp_output+0x14e6 tcp_usrreq(fffffd806eb4fc88,9,fffffd8063992100,0,0,ffff800020ede9d0) at tcp_usrreq+0xa55 sosend(fffffd806eb4fc88,0,ffff800020ecfda8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ede9d0,4,ffff800020ecfda8,0,ffff800020ecfe90) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ede9d0,ffff800020ecfe40,ffff800020ecfe90) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020ecff10) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ecff10) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcae40, count: 3 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821fefa6) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82656440) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82656440) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82656440,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000a0b980) at tcp_output+0x14e6 tcp_usrreq(fffffd806eb4fc88,9,fffffd8063992100,0,0,ffff800020ede9d0) at tcp_usrreq+0xa55 sosend(fffffd806eb4fc88,0,ffff800020ecfda8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ede9d0,4,ffff800020ecfda8,0,ffff800020ecfe90) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ede9d0,ffff800020ecfe40,ffff800020ecfe90) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020ecff10) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ecff10) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcae40, count: -12