panic(ffffffff821fb9a3) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff8265ec70) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff8265ec70) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff8265ec70,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8069517000,0,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8069517000,0,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000a0d100) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eb394b8,9,fffffd8069517000,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 sosend(fffffd806eb394b8,0,ffff800020e8d548,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1d50,4,ffff800020e8d548,0,ffff800020e8d630) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1d50,ffff800020e8d5e0,ffff800020e8d630) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e8d6b0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e8d6b0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffee870, 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 0xfffffd806a084700+24 0x7e7f8da5dee24415!=0x7e7f8d25b3b9f715 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821fb9a3) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff8265ec70) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff8265ec70) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff8265ec70,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8069517000,0,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8069517000,0,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000a0d100) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eb394b8,9,fffffd8069517000,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 sosend(fffffd806eb394b8,0,ffff800020e8d548,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1d50,4,ffff800020e8d548,0,ffff800020e8d630) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1d50,ffff800020e8d5e0,ffff800020e8d630) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e8d6b0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e8d6b0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffee870, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e8cee0 rbx 0xffff800020e8cf90 rdx 0xffff800020ed1d50 rcx 0 rax 0 r8 0xffffffff81113b2f kprintf+0x16f r9 0x1 r10 0x2 r11 0x7e9b6222842d5db5 r12 0x3000000008 r13 0xffff800020e8cef0 r14 0x100 r15 0x1 rip 0xffffffff81a90538 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e8ced0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (sshd) pid=360310 stat=onproc flags process=12 proc=0 pri=50, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020ed0010,0xffff800020ed0500 process=0xffff800020ec87c8 user=0xffff800020e88000, vmspace=0xfffffd806e94d178 estcpu=1, cpticks=3, pctcpu=0.1 user=0, sys=3, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 24533 8158 76369 0 2 0 syz-executor.1 24533 138802 76369 0 7 0x4000000 syz-executor.1 62288 345174 0 0 3 0x14200 bored sosplice 76369 283115 31909 0 2 0x482 syz-executor.1 71562 45590 31909 0 2 0x2 syz-executor.0 31909 52549 91549 0 3 0x82 thrsleep syz-fuzzer 31909 124025 91549 0 2 0x4000482 syz-fuzzer 31909 507412 91549 0 2 0x4000482 syz-fuzzer 31909 312273 91549 0 3 0x4000082 thrsleep syz-fuzzer 31909 93379 91549 0 3 0x4000082 thrsleep syz-fuzzer 31909 455578 91549 0 3 0x4000082 thrsleep syz-fuzzer 31909 470327 91549 0 3 0x4000082 thrsleep syz-fuzzer 31909 184666 91549 0 3 0x4000082 thrsleep syz-fuzzer 31909 348175 91549 0 3 0x4000082 kqread syz-fuzzer 31909 225951 91549 0 3 0x4000082 thrsleep syz-fuzzer 91549 508959 46086 0 3 0x10008a pause ksh *46086 360310 16415 0 7 0x12 sshd 36597 122991 1 0 3 0x100083 ttyin getty 16415 515787 1 0 3 0x80 select sshd 4412 202544 77167 74 3 0x100092 bpf pflogd 77167 247783 1 0 3 0x80 netio pflogd 59868 389001 3700 73 3 0x100090 kqread syslogd 3700 396634 1 0 3 0x100082 netio syslogd 25751 365020 1 77 3 0x100090 poll dhclient 90619 403966 1 0 3 0x80 poll dhclient 26102 160086 0 0 3 0x14200 bored smr 24861 465622 0 0 2 0x14200 zerothread 33964 420457 0 0 3 0x14200 aiodoned aiodoned 93357 381116 0 0 3 0x14200 syncer update 3508 31038 0 0 3 0x14200 cleaner cleaner 47744 342012 0 0 3 0x14200 reaper reaper 79557 18566 0 0 3 0x14200 pgdaemon pagedaemon 39268 449406 0 0 3 0x14200 bored crynlk 51458 142446 0 0 3 0x14200 bored crypto 98145 105438 0 0 3 0x40014200 acpi0 acpi0 92106 387905 0 0 3 0x40014200 idle1 87532 211315 0 0 3 0x14200 bored softnet 50376 240348 0 0 3 0x14200 bored systqmp 98414 274807 0 0 3 0x14200 bored systq 72975 503779 0 0 3 0x40014200 bored softclock 74605 203718 0 0 3 0x40014200 idle0 1 368808 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive sched_lock &sched_lock r = 0 (0xffffffff8266f2d0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 sleep_setup+0xf1 sys/kern/kern_synch.c:380 #2 rwsleep+0x81 sleep_setup_timeout sys/kern/kern_synch.c:435 [inline] #2 rwsleep+0x81 sys/kern/kern_synch.c:307 #3 thrsleep+0x3f2 sys/kern/kern_synch.c:736 #4 sys___thrsleep+0xb5 sys/kern/kern_synch.c:777 #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 Process 71562 (syz-executor.0) thread 0xffff800020e6dad8 (45590) exclusive rrwlock inode r = 0 (0xfffffd8065fd4f80) #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 (0xfffffd806b319808) #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 31909 (syz-fuzzer) thread 0xffff800020e6c008 (225951) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8266bee8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 sleep_setup+0xcf sys/kern/kern_synch.c:373 #2 rwsleep+0x81 sleep_setup_timeout sys/kern/kern_synch.c:435 [inline] #2 rwsleep+0x81 sys/kern/kern_synch.c:307 #3 thrsleep+0x3f2 sys/kern/kern_synch.c:736 #4 sys___thrsleep+0xb5 sys/kern/kern_synch.c:777 #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 rwlock pslock r = 0 (0xffff800020ec9058) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 thrsleep+0x36b sys/kern/kern_synch.c:729 #2 sys___thrsleep+0xb5 sys/kern/kern_synch.c:777 #3 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #4 Xsyscall+0x128 Process 46086 (sshd) thread 0xffff800020ed1d50 (360310) exclusive rwlock netlock r = 0 (0xffffffff824bc3f8) #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 9505 6411K 6922K 78643K 10989 0 pcb 13 8K 8K 78643K 62 0 rtable 103 3K 3K 78643K 279 0 ifaddr 66 13K 14K 78643K 98 0 counters 43 33K 34K 78643K 51 0 ioctlops 0 0K 4K 78643K 1481 0 iov 0 0K 18K 78643K 34 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1331 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 32 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 238 0 sigio 0 0K 0K 78643K 1 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 33 0 in_multi 49 2K 3K 78643K 89 0 ether_multi 1 0K 0K 78643K 10 0 mrt 1 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 224 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 122 39K 39K 78643K 1719 0 UVM aobj 18 7K 7K 78643K 18 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 44 0 NDP 10 0K 0K 78643K 19 0 temp 89 3045K 3109K 78643K 13101 0 kqueue 3 4K 12K 78643K 28 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 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 27 0 25 1 0 1 1 0 8 0 rtentry 112 59 0 16 2 0 2 2 0 8 0 unpcb 120 165 0 155 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 91 0 91 1 1 0 1 0 8 0 tcpcb 544 102 0 98 1 0 1 1 0 8 0 inpcb 280 297 0 290 2 0 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 8 0 3 1 0 1 1 0 8 0 pffrag 232 2 0 2 1 1 0 1 0 482 0 pffrnode 88 2 0 2 1 1 0 1 0 8 0 pffrent 40 4 0 4 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 pfstitem 24 35 0 4 1 0 1 1 0 8 0 pfstkey 112 35 0 4 1 0 1 1 0 8 0 pfstate 328 35 0 4 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 258 0 44 14 0 14 14 0 8 0 art_table 32 259 0 44 2 0 2 2 0 8 0 art_node 16 58 0 18 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 2 1 0 1 1 0 8 0 semapl 112 30 0 20 1 0 1 1 0 8 0 shmpl 112 16 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1766 0 362 89 0 89 89 0 8 0 ffsino 272 1766 0 362 95 0 95 95 0 8 0 nchpl 144 2330 0 720 60 0 60 60 0 8 0 uvmvnodes 72 1888 0 0 35 0 35 35 0 8 0 vnodes 208 1888 0 0 100 0 100 100 0 8 0 namei 1024 6563 0 6563 1 0 1 1 0 8 1 percpumem 16 36 0 4 1 0 1 1 0 8 0 vcpupl 1984 1 0 0 1 0 1 1 0 8 0 vmpool 560 3 0 2 2 1 1 1 0 8 0 scxspl 192 6493 0 6493 8 4 4 7 0 8 4 plimitpl 152 38 0 30 1 0 1 1 0 8 0 sigapl 424 454 0 422 4 0 4 4 0 8 0 futexpl 56 3490 0 3490 1 0 1 1 0 8 1 knotepl 112 87 0 68 1 0 1 1 0 8 0 kqueuepl 144 51 0 49 1 0 1 1 0 8 0 pipelkpl 48 98 0 88 1 0 1 1 0 8 0 pipepl 120 196 0 177 1 0 1 1 0 8 0 fdescpl 496 438 0 422 3 0 3 3 0 8 0 filepl 152 2621 0 2521 5 0 5 5 0 8 1 lockfpl 104 59 0 58 1 0 1 1 0 8 0 lockfspl 48 19 0 18 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 234 0 225 1 0 1 1 0 8 0 zombiepl 144 422 0 422 1 0 1 1 0 8 1 processpl 984 454 0 422 5 0 5 5 0 8 0 procpl 624 947 0 905 4 0 4 4 0 8 0 sosppl 128 6 0 6 1 0 1 1 0 8 1 sockpl 400 490 0 471 4 0 4 4 0 8 2 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 178 0 0 22 0 22 22 0 8 0 mtagpl 80 38 0 0 1 0 1 1 0 8 0 mbufpl 256 209 0 0 13 0 13 13 0 8 0 bufpl 280 3938 0 132 272 0 272 272 0 8 0 anonpl 16 51197 0 37224 60 1 59 59 0 124 0 amapchunkpl 152 2547 0 2402 21 1 20 20 0 158 13 amappl16 192 1811 0 1030 41 0 41 41 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 228 0 222 1 0 1 1 0 8 0 amappl13 168 26 0 24 1 0 1 1 0 8 0 amappl12 160 9 0 6 2 1 1 1 0 8 0 amappl11 152 58 0 42 1 0 1 1 0 8 0 amappl10 144 16 0 13 1 0 1 1 0 8 0 amappl9 136 402 0 399 1 0 1 1 0 8 0 amappl8 128 354 0 319 2 0 2 2 0 8 0 amappl7 120 116 0 105 1 0 1 1 0 8 0 amappl6 112 29 0 22 1 0 1 1 0 8 0 amappl5 104 332 0 314 1 0 1 1 0 8 0 amappl4 96 491 0 463 1 0 1 1 0 8 0 amappl3 88 311 0 302 1 0 1 1 0 8 0 amappl2 80 2556 0 2487 2 0 2 2 0 8 0 amappl1 72 19656 0 19211 23 13 10 18 0 8 0 amappl 80 1197 0 1151 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 17 0 0 1 0 1 1 0 8 0 uaddrrnd 24 441 0 424 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 441 0 424 1 0 1 1 0 8 0 vmmpekpl 168 7385 0 7354 2 0 2 2 0 8 0 vmmpepl 168 59791 0 57845 109 14 95 105 0 357 8 vmsppl 368 440 0 424 2 0 2 2 0 8 0 pdppl 4096 890 0 849 6 0 6 6 0 8 0 pvpl 32 178119 0 161029 149 0 149 149 0 265 5 pmappl 232 440 0 424 3 1 2 2 0 8 1 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 262 0 3 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff824aaff0) 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(3f8,0,30) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,30) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,30) at comcnputc+0x131 sys/dev/ic/com.c:1254 cnputc(30) at cnputc+0x4c sys/dev/cons.c:239 kputchar(30,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052 panic(ffffffff821f85ab) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821f85ab) at panic+0xf3 sys/kern/subr_prf.c:197 __assert(ffffffff82252591,ffffffff822403f4,29e,ffffffff8222230f) 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(ffffffff824aaff0) 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(3f8,0,30) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,30) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,30) at comcnputc+0x131 sys/dev/ic/com.c:1254 cnputc(30) at cnputc+0x4c sys/dev/cons.c:239 kputchar(30,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052 panic(ffffffff821f85ab) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821f85ab) at panic+0xf3 sys/kern/subr_prf.c:197 __assert(ffffffff82252591,ffffffff822403f4,29e,ffffffff8222230f) 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(ffffffff821fb9a3) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff8265ec70) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff8265ec70) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff8265ec70,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8069517000,0,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8069517000,0,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000a0d100) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eb394b8,9,fffffd8069517000,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 sosend(fffffd806eb394b8,0,ffff800020e8d548,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1d50,4,ffff800020e8d548,0,ffff800020e8d630) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1d50,ffff800020e8d5e0,ffff800020e8d630) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e8d6b0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e8d6b0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffee870, count: 3 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821fb9a3) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff8265ec70) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff8265ec70) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff8265ec70,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8069517000,0,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8069517000,0,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000a0d100) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eb394b8,9,fffffd8069517000,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 sosend(fffffd806eb394b8,0,ffff800020e8d548,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1d50,4,ffff800020e8d548,0,ffff800020e8d630) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1d50,ffff800020e8d5e0,ffff800020e8d630) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e8d6b0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e8d6b0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffee870, count: -12