panic:W ApRoNoINlG_:c acSPhLe_ NiOteT mL_OmWaEgRiEcD_ cOhNe cSkY:S CmbALuLf pl13 c7 p-u14 7fr16e8e ElXisITt m0 o9d i fiStopped at savectx+0xb1: movl $0,%gs:0x530 TID PID UID PRFLAGS PFLAGS CPU COMMAND *470485 21675 0 0x2 0 0 syz-executor.1 189882 86935 0 0x12 0 1 sshd savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7ffffdc110, count: 14 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f173c00+16 0x0!=0x7f9090a5c9b2da30 ddb{0}> trace savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7ffffdc110, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000231899b0 rbx 0 rdx 0xffff800020e6d388 rcx 0 rax 0x39 r8 0xffffffff81ce7e0f kprintf+0x16f r9 0x1 r10 0x25 r11 0x98710e6c37dcaaa8 r12 0 r13 0 r14 0xffff800020e6d388 r15 0 rip 0xffffffff81d693f1 savectx+0xb1 cs 0x8 rflags 0x46 rsp 0xffff800023189930 ss 0x10 savectx+0xb1: movl $0,%gs:0x530 ddb{0}> show proc PROC (syz-executor.1) pid=470485 stat=onproc flags process=2 proc=0 pri=17, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff800020e6dd48,0xffff800020ec7af8 process=0xffff800020e80f70 user=0xffff800023184000, vmspace=0xfffffd807efff5c0 estcpu=36, cpticks=4, pctcpu=0.8 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 228 519643 0 0 3 0x14200 bored sosplice 825 309374 25411 0 3 0x80 nanosleep syz-executor.0 825 403529 25411 0 3 0x4000080 netcon syz-executor.0 825 225566 25411 0 3 0x4000080 fsleep syz-executor.0 *21675 470485 84532 0 7 0x2 syz-executor.1 25411 466891 84532 0 3 0x82 nanosleep syz-executor.0 84532 185648 81542 0 3 0x82 thrsleep syz-fuzzer 84532 209253 81542 0 3 0x4000082 nanosleep syz-fuzzer 84532 424888 81542 0 3 0x4000082 thrsleep syz-fuzzer 84532 248184 81542 0 3 0x4000082 thrsleep syz-fuzzer 84532 232786 81542 0 3 0x4000082 thrsleep syz-fuzzer 84532 269202 81542 0 3 0x4000082 thrsleep syz-fuzzer 84532 197923 81542 0 3 0x4000082 thrsleep syz-fuzzer 84532 481492 81542 0 3 0x4000082 kqread syz-fuzzer 84532 287836 81542 0 3 0x4000082 thrsleep syz-fuzzer 84532 398552 81542 0 3 0x4000082 thrsleep syz-fuzzer 81542 292346 86935 0 3 0x10008a pause ksh 86935 189882 98460 0 7 0x12 sshd 94958 521550 1 0 3 0x100083 ttyin getty 98460 101492 1 0 3 0x80 select sshd 21482 92341 42558 74 3 0x100092 bpf pflogd 42558 144382 1 0 3 0x80 netio pflogd 58263 371667 79686 73 3 0x100090 kqread syslogd 79686 11614 1 0 3 0x100082 netio syslogd 13801 318381 1 77 3 0x100090 poll dhclient 37288 234318 1 0 3 0x80 poll dhclient 99687 467288 0 0 3 0x14200 bored smr 8978 481562 0 0 3 0x14200 pgzero zerothread 92684 361478 0 0 3 0x14200 aiodoned aiodoned 12447 496741 0 0 3 0x14200 syncer update 28649 204969 0 0 3 0x14200 cleaner cleaner 86057 350588 0 0 3 0x14200 reaper reaper 76031 272811 0 0 3 0x14200 pgdaemon pagedaemon 35424 66676 0 0 3 0x14200 bored crynlk 31710 129890 0 0 3 0x14200 bored crypto 59113 406363 0 0 3 0x40014200 acpi0 acpi0 93105 332112 0 0 3 0x40014200 idle1 92055 377473 0 0 3 0x14200 bored softnet 32832 304811 0 0 3 0x14200 bored systqmp 47625 328756 0 0 3 0x14200 bored systq 77887 237822 0 0 3 0x40014200 bored softclock 79970 388029 0 0 3 0x40014200 idle0 1 481866 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &bq->bufq_mtx r = 0 (0xffff80000017ad68) #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 bufq_dequeue+0x2c sys/kern/kern_bufq.c:199 #4 sdstart+0x9f sys/scsi/sd.c:683 #5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:404 [inline] #5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:420 #6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596 #7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535 #8 sdstrategy+0x187 sys/scsi/sd.c:585 #9 spec_strategy+0x74 sys/kern/spec_vnops.c:468 #10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712 #11 bwrite+0x1b9 sys/kern/vfs_bio.c:756 #12 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113 #13 ffs_truncate+0xc76 #14 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355 #15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474 #16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886 #17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #18 Xsyscall+0x128 Process 21675 (syz-executor.1) thread 0xffff800020e6d388 (470485) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82662e18) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 #2 mi_switch+0x392 sys/kern/sched_bsd.c:435 #3 sleep_finish+0x113 sys/kern/kern_synch.c:418 #4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] #4 sleep_finish_all+0x32 sys/kern/kern_synch.c:393 #5 tsleep+0x1cc sys/kern/kern_synch.c:155 #6 biowait+0xa6 sys/kern/vfs_bio.c:1256 #7 bwrite+0x1e4 sys/kern/vfs_bio.c:765 #8 ufs_dirremove+0x291 #9 ufs_rmdir+0x247 sys/ufs/ufs/ufs_vnops.c:1328 #10 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474 #11 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886 #12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806df2bc50) #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 (0xfffffd806b3512b8) #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 exclusive mutex &bq->bufq_mtx r = 0 (0xffff80000017ad68) #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 bufq_dequeue+0x2c sys/kern/kern_bufq.c:199 #4 sdstart+0x9f sys/scsi/sd.c:683 #5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:404 [inline] #5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:420 #6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596 #7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535 #8 sdstrategy+0x187 sys/scsi/sd.c:585 #9 spec_strategy+0x74 sys/kern/spec_vnops.c:468 #10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712 #11 bwrite+0x1b9 sys/kern/vfs_bio.c:756 #12 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113 #13 ffs_truncate+0xc76 #14 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355 #15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474 #16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886 #17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #18 Xsyscall+0x128 Process 86935 (sshd) thread 0xffff800020ed1d50 (189882) exclusive rwlock netlock r = 0 (0xffffffff824fd5a8) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9513 6412K 6937K 78643K 10936 0 pcb 13 8K 8K 78643K 37 0 rtable 105 3K 3K 78643K 210 0 ifaddr 65 13K 13K 78643K 71 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 4K 78643K 1471 0 iov 0 0K 16K 78643K 12 0 mount 1 1K 1K 78643K 1 0 vnodes 1222 77K 77K 78643K 1348 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 1K 1K 78643K 2 0 sem 7 0K 0K 78643K 8 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 105 0 proc 59 63K 83K 78643K 441 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 12 0 in_multi 46 2K 3K 78643K 64 0 ether_multi 1 0K 0K 78643K 7 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 31 148K 148K 78643K 31 0 exec 0 0K 1K 78643K 215 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 125 22K 23K 78643K 1271 0 UVM aobj 6 2K 2K 78643K 6 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 16 0 NDP 10 0K 0K 78643K 14 0 temp 90 3037K 3101K 78643K 8345 0 kqueue 3 4K 12K 78643K 9 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 25 0 23 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 61 0 51 1 0 1 1 0 8 0 syncache 264 6 0 6 2 1 1 1 0 8 1 tcpqe 32 364 0 364 1 0 1 1 0 8 1 tcpcb 544 50 0 45 1 0 1 1 0 8 0 inpcb 280 144 0 135 2 0 2 2 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 pffrag 232 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 45 0 45 1 0 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 18 0 0 1 0 1 1 0 8 0 pfstkey 112 18 0 0 1 0 1 1 0 8 0 pfstate 328 18 0 0 2 0 2 2 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 256 188 0 0 12 0 12 12 0 8 0 art_table 32 189 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 semapl 112 6 0 1 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1542 0 139 89 0 89 89 0 8 0 ffsino 272 1542 0 139 95 0 95 95 0 8 0 nchpl 144 1855 0 250 60 0 60 60 0 8 0 uvmvnodes 72 1690 0 0 31 0 31 31 0 8 0 vnodes 208 1690 0 0 89 0 89 89 0 8 0 namei 1024 5046 0 5046 1 0 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 vmpool 560 2 0 2 1 0 1 1 0 8 1 scxspl 192 4966 0 4966 8 1 7 7 0 8 7 plimitpl 152 23 0 15 1 0 1 1 0 8 0 sigapl 424 321 0 289 4 0 4 4 0 8 0 futexpl 56 1340 0 1339 1 0 1 1 0 8 0 knotepl 112 67 0 48 1 0 1 1 0 8 0 kqueuepl 144 18 0 15 1 0 1 1 0 8 0 pipelkpl 48 79 0 69 1 0 1 1 0 8 0 pipepl 120 158 0 139 1 0 1 1 0 8 0 fdescpl 496 305 0 289 3 0 3 3 0 8 0 filepl 152 1699 0 1595 5 0 5 5 0 8 0 lockfpl 104 47 0 46 1 0 1 1 0 8 0 lockfspl 48 15 0 14 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 143 0 134 1 0 1 1 0 8 0 zombiepl 144 289 0 289 1 0 1 1 0 8 1 processpl 984 321 0 289 5 0 5 5 0 8 0 procpl 624 503 0 460 4 0 4 4 0 8 0 sosppl 128 1 0 0 1 0 1 1 0 8 0 sockpl 400 230 0 209 3 0 3 3 0 8 0 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 176 0 0 21 0 21 21 0 8 0 mtagpl 80 6 0 0 1 0 1 1 0 8 0 mbufpl 256 304 0 0 18 0 18 18 0 8 0 bufpl 280 3507 0 135 241 0 241 241 0 8 0 anonpl 16 43011 0 29541 61 1 60 60 0 124 5 amapchunkpl 152 1657 0 1517 11 0 11 11 0 158 4 amappl16 192 1123 0 408 37 0 37 37 0 8 1 amappl15 184 39 0 36 1 0 1 1 0 8 0 amappl14 176 58 0 52 1 0 1 1 0 8 0 amappl13 168 27 0 25 1 0 1 1 0 8 0 amappl12 160 48 0 41 1 0 1 1 0 8 0 amappl11 152 59 0 44 1 0 1 1 0 8 0 amappl10 144 17 0 13 1 0 1 1 0 8 0 amappl9 136 393 0 391 1 0 1 1 0 8 0 amappl8 128 354 0 320 2 0 2 2 0 8 0 amappl7 120 118 0 106 1 0 1 1 0 8 0 amappl6 112 29 0 25 1 0 1 1 0 8 0 amappl5 104 205 0 188 1 0 1 1 0 8 0 amappl4 96 485 0 456 1 0 1 1 0 8 0 amappl3 88 135 0 129 1 0 1 1 0 8 0 amappl2 80 1520 0 1447 2 0 2 2 0 8 0 amappl1 72 16673 0 16235 23 10 13 18 0 8 3 amappl 80 754 0 708 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 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 307 0 291 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 307 0 291 1 0 1 1 0 8 0 vmmpekpl 168 6387 0 6353 2 0 2 2 0 8 0 vmmpepl 168 44003 0 42129 108 6 102 102 0 357 16 vmsppl 368 306 0 291 2 0 2 2 0 8 0 pdppl 4096 622 0 582 6 0 6 6 0 8 0 pvpl 32 149516 0 132869 149 0 149 149 0 265 13 pmappl 232 306 0 291 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 263 0 3 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7ffffdc110, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020e00ff0) 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(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254 cnputc(69) at cnputc+0x4c sys/dev/cons.c:239 kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700 panic(ffffffff821f7274) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821f7274) at panic+0xf3 sys/kern/subr_prf.c:197 pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82691c90,2) 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(ffff800000a0b320) at tcp_output+0x14e6 tcp_usrreq(fffffd806eb384b8,9,fffffd807cc66b00,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 end trace frame: 0xffff800020e8da40, count: 0 ddb{1}> trace x86_ipi_db(ffff800020e00ff0) 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(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254 cnputc(69) at cnputc+0x4c sys/dev/cons.c:239 kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700 panic(ffffffff821f7274) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821f7274) at panic+0xf3 sys/kern/subr_prf.c:197 pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82691c90) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82691c90,2) 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(ffff800000a0b320) at tcp_output+0x14e6 tcp_usrreq(fffffd806eb384b8,9,fffffd807cc66b00,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 sosend(fffffd806eb384b8,0,ffff800020e8db08,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1d50,4,ffff800020e8db08,0,ffff800020e8dbf0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1d50,ffff800020e8dba0,ffff800020e8dbf0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e8dc70) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e8dc70) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe2ae0, count: -19