panic: pWoAoRl_NIcNaGc:h e_SiPLt emNO_Tm LagOWiEcR_EcDhe OcNk :S YmSbuCAfpLLl c13p7u -fr21e5e 72l8i sEtX ImTo d0i f9ie d:Stopped at savectx+0xb1: movl $0,%gs:0x530 TID PID UID PRFLAGS PFLAGS CPU COMMAND *387743 4556 0 0x2 0 0 syz-executor.0 76709 65757 0 0x12 0 1 sshd savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7ffffcb540, 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 0xfffffd80682b8d00+16 0x0!=0x16688551cc7d6435 ddb{0}> trace savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7ffffcb540, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800020f6dfc0 rbx 0 rdx 0xffff800020e6d868 rcx 0 rax 0x39 r8 0xffffffff81f8ff4f kprintf+0x16f r9 0x1 r10 0x25 r11 0xf7780d994cb66b73 r12 0 r13 0 r14 0xffff800020e6d868 r15 0 rip 0xffffffff8218f3f1 savectx+0xb1 cs 0x8 rflags 0x46 rsp 0xffff800020f6df40 ss 0x10 savectx+0xb1: movl $0,%gs:0x530 ddb{0}> show proc PROC (syz-executor.0) pid=387743 stat=onproc flags process=2 proc=0 pri=17, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff800020e6cea8,0xffff800020e6d128 process=0xffff800020e81348 user=0xffff800020f68000, vmspace=0xfffffd807efff8a0 estcpu=36, cpticks=1, pctcpu=0.19 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1203 223481 0 0 3 0x14200 acct acct 13719 430068 0 0 3 0x14200 bored sosplice 45305 387187 1 0 3 0x100083 ttyin getty 81423 414050 11432 0 2 0x2 syz-executor.1 * 4556 387743 11432 0 7 0x2 syz-executor.0 11432 235189 85861 0 3 0x82 thrsleep syz-fuzzer 11432 359371 85861 0 3 0x4000082 nanosleep syz-fuzzer 11432 655 85861 0 3 0x4000082 thrsleep syz-fuzzer 11432 474266 85861 0 3 0x4000082 thrsleep syz-fuzzer 11432 47552 85861 0 3 0x4000082 thrsleep syz-fuzzer 11432 12115 85861 0 3 0x4000082 thrsleep syz-fuzzer 11432 377271 85861 0 3 0x4000082 thrsleep syz-fuzzer 11432 49547 85861 0 3 0x4000082 thrsleep syz-fuzzer 11432 476512 85861 0 3 0x4000082 nanosleep syz-fuzzer 11432 98657 85861 0 3 0x4000082 kqread syz-fuzzer 85861 307983 65757 0 3 0x10008a pause ksh 65757 76709 84558 0 7 0x12 sshd 84558 3198 1 0 3 0x80 select sshd 74561 99730 39501 74 3 0x100092 bpf pflogd 39501 434268 1 0 3 0x80 netio pflogd 53671 392272 84175 73 3 0x100090 kqread syslogd 84175 128695 1 0 3 0x100082 netio syslogd 17083 122197 1 77 3 0x100090 poll dhclient 13775 388912 1 0 3 0x80 poll dhclient 8341 1370 0 0 3 0x14200 bored smr 55000 419874 0 0 3 0x14200 pgzero zerothread 53309 92343 0 0 3 0x14200 aiodoned aiodoned 72538 457095 0 0 3 0x14200 syncer update 7690 437354 0 0 3 0x14200 cleaner cleaner 575 205647 0 0 3 0x14200 reaper reaper 30932 229483 0 0 3 0x14200 pgdaemon pagedaemon 37631 216116 0 0 3 0x14200 bored crynlk 75882 485047 0 0 3 0x14200 bored crypto 6421 322906 0 0 3 0x40014200 acpi0 acpi0 33085 166800 0 0 3 0x40014200 idle1 68401 338065 0 0 2 0x14200 softnet 88876 462549 0 0 3 0x14200 bored systqmp 2855 116909 0 0 3 0x14200 bored systq 94109 292729 0 0 3 0x40014200 bored softclock 97224 339382 0 0 3 0x40014200 idle0 1 467140 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &iopl->mtx r = 0 (0xffff800000038170) #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 scsi_xsh_runqueue+0x37 scsi_pending_start sys/scsi/scsi_base.c:214 [inline] #3 scsi_xsh_runqueue+0x37 sys/scsi/scsi_base.c:576 #4 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535 #5 sdstrategy+0x187 sys/scsi/sd.c:585 #6 spec_strategy+0x74 sys/kern/spec_vnops.c:468 #7 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712 #8 bwrite+0x1b9 sys/kern/vfs_bio.c:756 #9 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113 #10 ffs_truncate+0xc76 #11 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355 #12 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474 #13 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886 #14 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #14 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #15 Xsyscall+0x128 Process 4556 (syz-executor.0) thread 0xffff800020e6d868 (387743) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8266f830) #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 getblk+0x14c sys/kern/vfs_bio.c:1019 #7 bread+0x3a bio_doread sys/kern/vfs_bio.c:435 [inline] #7 bread+0x3a sys/kern/vfs_bio.c:480 #8 ffs_update+0x14a sys/ufs/ffs/ffs_inode.c:91 #9 ffs_truncate+0xc76 #10 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355 #11 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474 #12 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886 #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 (0xfffffd806e33ac48) #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 (0xfffffd806b59b6f8) #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 &iopl->mtx r = 0 (0xffff800000038170) #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 scsi_xsh_runqueue+0x37 scsi_pending_start sys/scsi/scsi_base.c:214 [inline] #3 scsi_xsh_runqueue+0x37 sys/scsi/scsi_base.c:576 #4 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535 #5 sdstrategy+0x187 sys/scsi/sd.c:585 #6 spec_strategy+0x74 sys/kern/spec_vnops.c:468 #7 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712 #8 bwrite+0x1b9 sys/kern/vfs_bio.c:756 #9 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113 #10 ffs_truncate+0xc76 #11 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355 #12 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474 #13 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886 #14 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #14 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #15 Xsyscall+0x128 Process 65757 (sshd) thread 0xffff800020ed1d50 (76709) exclusive rwlock netlock r = 0 (0xffffffff8252ae18) #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 9495 6407K 6788K 78643K 10863 0 pcb 13 8K 9K 78643K 310 0 rtable 94 3K 4K 78643K 269 0 ifaddr 61 13K 14K 78643K 110 0 counters 43 33K 34K 78643K 59 0 ioctlops 0 0K 4K 78643K 1479 0 iov 0 0K 18K 78643K 41 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1322 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 5 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 52 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 4 9K 25K 78643K 262 0 sigio 0 0K 0K 78643K 6 0 proc 60 63K 95K 78643K 488 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 26 0 in_multi 45 2K 2K 78643K 85 0 ether_multi 1 0K 0K 78643K 11 0 mrt 0 0K 0K 78643K 8 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 37 175K 175K 78643K 37 0 exec 0 0K 1K 78643K 230 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 134 23K 24K 78643K 1790 0 UVM aobj 10 2K 2K 78643K 10 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 68 0 NDP 9 0K 0K 78643K 21 0 temp 85 3037K 3102K 78643K 8341 0 kqueue 3 4K 8K 78643K 12 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 27 0 25 1 0 1 1 0 8 0 rtentry 112 49 0 12 2 0 2 2 0 8 0 unpcb 120 229 0 219 1 0 1 1 0 8 0 syncache 264 6 0 6 2 1 1 1 0 8 1 tcpqe 32 165 0 165 1 1 0 1 0 8 0 tcpcb 544 120 0 116 1 0 1 1 0 8 0 inpcb 280 565 0 558 2 0 2 2 0 8 1 rttmr 72 4 0 4 1 1 0 1 0 8 0 nd6 48 6 0 3 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pffrag 232 8 0 8 1 0 1 1 0 482 1 pffrnode 88 8 0 8 1 0 1 1 0 8 1 pffrent 40 61 0 61 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 48 0 3 1 0 1 1 0 8 0 pfstkey 112 48 0 3 2 0 2 2 0 8 0 pfstate 328 48 0 3 4 0 4 4 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 256 189 0 40 12 0 12 12 0 8 0 art_table 32 190 0 40 2 0 2 2 0 8 0 art_node 16 48 0 14 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 9 2 1 1 1 0 8 1 semapl 112 48 0 38 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1760 0 355 89 0 89 89 0 8 0 ffsino 272 1760 0 355 95 0 95 95 0 8 0 nchpl 144 2390 0 786 60 0 60 60 0 8 0 uvmvnodes 72 1867 0 0 34 0 34 34 0 8 0 vnodes 208 1867 0 0 99 0 99 99 0 8 0 namei 1024 6500 0 6500 1 0 1 1 0 8 1 percpumem 16 40 0 8 1 0 1 1 0 8 0 scxspl 192 6342 0 6342 8 5 3 7 0 8 3 plimitpl 152 39 0 31 1 0 1 1 0 8 0 sigapl 424 480 0 448 4 0 4 4 0 8 0 futexpl 56 4398 0 4398 1 0 1 1 0 8 1 knotepl 112 68 0 49 1 0 1 1 0 8 0 kqueuepl 144 24 0 22 1 0 1 1 0 8 0 pipelkpl 48 123 0 113 1 0 1 1 0 8 0 pipepl 120 246 0 227 2 1 1 2 0 8 0 fdescpl 496 463 0 448 3 0 3 3 0 8 0 filepl 152 2974 0 2874 6 0 6 6 0 8 1 lockfpl 104 92 0 91 1 0 1 1 0 8 0 lockfspl 48 27 0 26 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 21 0 10 1 0 1 1 0 8 0 ucredpl 96 224 0 214 1 0 1 1 0 8 0 zombiepl 144 448 0 448 1 0 1 1 0 8 1 processpl 984 480 0 448 5 0 5 5 0 8 0 procpl 624 990 0 949 4 0 4 4 0 8 0 sosppl 128 2 0 2 1 1 0 1 0 8 0 sockpl 400 824 0 805 6 1 5 5 0 8 3 mcl64k 65536 16 0 0 2 0 2 2 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 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 173 0 0 21 0 21 21 0 8 0 mtagpl 80 20 0 0 1 0 1 1 0 8 0 mbufpl 256 228 0 0 13 0 13 13 0 8 0 bufpl 280 3775 0 150 259 0 259 259 0 8 0 anonpl 16 54982 0 39926 64 2 62 63 0 124 0 amapchunkpl 152 2227 0 2098 8 1 7 8 0 158 0 amappl16 192 1781 0 969 43 1 42 43 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 253 0 248 1 0 1 1 0 8 0 amappl13 168 255 0 252 1 0 1 1 0 8 0 amappl12 160 3 0 2 1 0 1 1 0 8 0 amappl11 152 52 0 37 1 0 1 1 0 8 0 amappl10 144 22 0 15 1 0 1 1 0 8 0 amappl9 136 556 0 553 1 0 1 1 0 8 0 amappl8 128 343 0 312 2 0 2 2 0 8 0 amappl7 120 120 0 107 1 0 1 1 0 8 0 amappl6 112 35 0 26 1 0 1 1 0 8 0 amappl5 104 360 0 345 1 0 1 1 0 8 0 amappl4 96 488 0 459 1 0 1 1 0 8 0 amappl3 88 123 0 116 1 0 1 1 0 8 0 amappl2 80 3008 0 2937 2 0 2 2 0 8 0 amappl1 72 23488 0 22989 23 12 11 18 0 8 0 amappl 80 1241 0 1200 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 9 0 0 1 0 1 1 0 8 0 uaddrrnd 24 463 0 448 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 463 0 448 1 0 1 1 0 8 0 vmmpekpl 168 17071 0 17044 2 0 2 2 0 8 0 vmmpepl 168 77992 0 75999 116 12 104 110 0 357 4 vmsppl 368 462 0 448 2 0 2 2 0 8 0 pdppl 4096 934 0 896 6 0 6 6 0 8 0 pvpl 32 234510 0 215878 163 2 161 163 0 265 5 pmappl 232 462 0 448 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 263 0 4 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: 0x7f7ffffcb540, 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(3f8,0,3a) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,3a) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,3a) at comcnputc+0x131 sys/dev/ic/com.c:1254 cnputc(3a) at cnputc+0x4c sys/dev/cons.c:239 kputchar(3a,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700 panic(ffffffff821f6206) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821f6206) at panic+0xf3 sys/kern/subr_prf.c:197 pool_cache_get(ffffffff82677bf0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82677bf0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82677bf0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd807cab5100,7dc,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd807cab5100,7dc,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000a0acc0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eb437d8,9,fffffd807cb36800,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 end trace frame: 0xffff800020e8db80, 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(3f8,0,3a) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,3a) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,3a) at comcnputc+0x131 sys/dev/ic/com.c:1254 cnputc(3a) at cnputc+0x4c sys/dev/cons.c:239 kputchar(3a,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700 panic(ffffffff821f6206) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821f6206) at panic+0xf3 sys/kern/subr_prf.c:197 pool_cache_get(ffffffff82677bf0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82677bf0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82677bf0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd807cab5100,7dc,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd807cab5100,7dc,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000a0acc0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eb437d8,9,fffffd807cb36800,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 sosend(fffffd806eb437d8,0,ffff800020e8dc48,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1d50,4,ffff800020e8dc48,0,ffff800020e8dd30) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1d50,ffff800020e8dce0,ffff800020e8dd30) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e8ddb0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e8ddb0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd3120, count: -19