login: panic: poWoAlR_NcINaGc:h eS_PiLt eNmOT_ mLaOgWiEcR_EchD ecONk :S mYSbCuAfpLLl 1c37pu - f76r2e0e8 liEsXItT m0o 9d if iStopped at savectx+0xb1: movl $0,%gs:0x530 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 82783 90702 0 0x2 0 0 syz-executor.0 396612 75545 0 0x12 0 1 sshd savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7ffffed640, 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 0xfffffd807f01f200+24 0x5c4cbf1e54511316!=0x5c4cbf9e3d2e8e16 ddb{0}> trace savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7ffffed640, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800020f6b8d0 rbx 0 rdx 0xffff800020e6dd48 rcx 0 rax 0x38 r8 0xffffffff810fbc8f kprintf+0x16f r9 0x1 r10 0x25 r11 0x4522d5bf3e52793c r12 0 r13 0 r14 0xffff800020e6dd48 r15 0 rip 0xffffffff8195c3f1 savectx+0xb1 cs 0x8 rflags 0x46 rsp 0xffff800020f6b850 ss 0 savectx+0xb1: movl $0,%gs:0x530 ddb{0}> show proc PROC (syz-executor.0) pid=82783 stat=onproc flags process=2 proc=0 pri=17, usrpri=59, nice=20 forw=0xffffffffffffffff, list=0xffff800020e6c758,0xffff800020ed9618 process=0xffff800020e807c0 user=0xffff800020f66000, vmspace=0xfffffd807f000450 estcpu=36, cpticks=1, pctcpu=0.2 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 3663 350943 0 0 3 0x14200 acct acct 64715 402129 0 0 3 0x14200 bored sosplice 88479 196274 5868 0 2 0x2 syz-executor.1 *90702 82783 5868 0 7 0x2 syz-executor.0 5868 124074 75296 0 3 0x82 thrsleep syz-fuzzer 5868 27476 75296 0 3 0x4000082 nanosleep syz-fuzzer 5868 358657 75296 0 3 0x4000082 thrsleep syz-fuzzer 5868 27454 75296 0 2 0x4000002 syz-fuzzer 5868 212880 75296 0 3 0x4000082 thrsleep syz-fuzzer 5868 387606 75296 0 3 0x4000082 thrsleep syz-fuzzer 5868 390586 75296 0 3 0x4000082 thrsleep syz-fuzzer 5868 384643 75296 0 2 0x4000002 syz-fuzzer 5868 143348 75296 0 3 0x4000082 thrsleep syz-fuzzer 5868 175204 75296 0 3 0x4000082 thrsleep syz-fuzzer 75296 468433 75545 0 3 0x10008a pause ksh 75545 396612 98986 0 7 0x12 sshd 18667 363366 1 0 3 0x100083 ttyin getty 98986 162061 1 0 3 0x80 select sshd 75317 360367 22879 74 3 0x100092 bpf pflogd 22879 300994 1 0 3 0x80 netio pflogd 97615 210156 4994 73 3 0x100090 kqread syslogd 4994 365400 1 0 3 0x100082 netio syslogd 84950 344810 1 77 3 0x100090 poll dhclient 28861 70217 1 0 3 0x80 poll dhclient 39048 453862 0 0 3 0x14200 bored smr 51501 328327 0 0 3 0x14200 pgzero zerothread 69907 451495 0 0 3 0x14200 aiodoned aiodoned 75812 448064 0 0 3 0x14200 syncer update 98011 315051 0 0 3 0x14200 cleaner cleaner 57888 49568 0 0 3 0x14200 reaper reaper 99695 126619 0 0 3 0x14200 pgdaemon pagedaemon 60011 341344 0 0 3 0x14200 bored crynlk 19072 156042 0 0 3 0x14200 bored crypto 52745 312422 0 0 3 0x40014200 acpi0 acpi0 65430 439844 0 0 3 0x40014200 idle1 84712 322085 0 0 3 0x14200 bored softnet 54591 13117 0 0 3 0x14200 bored systqmp 39085 327528 0 0 3 0x14200 bored systq 35132 273942 0 0 3 0x40014200 bored softclock 39811 471964 0 0 3 0x40014200 idle0 1 245990 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 90702 (syz-executor.0) thread 0xffff800020e6dd48 (82783) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82681848) #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 (0xfffffd806b3545e8) #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 (0xfffffd806b354918) #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 75545 (sshd) thread 0xffff800020ed1390 (396612) exclusive rwlock netlock r = 0 (0xffffffff82517dc8) #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 9511 6663K 6789K 78643K 10718 0 pcb 13 8K 8K 78643K 25 0 rtable 107 3K 3K 78643K 223 0 ifaddr 57 12K 12K 78643K 63 0 counters 43 33K 34K 78643K 45 0 ioctlops 0 0K 4K 78643K 1472 0 iov 0 0K 16K 78643K 24 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1266 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 12 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1823 197K 290K 78643K 12980 0 file desc 4 9K 25K 78643K 117 0 sigio 0 0K 0K 78643K 1 0 proc 60 63K 95K 78643K 446 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 4 0 in_multi 46 2K 2K 78643K 49 0 ether_multi 1 0K 0K 78643K 2 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 225 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 117 22K 23K 78643K 1314 0 UVM aobj 2 2K 2K 78643K 2 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 10 0 NDP 8 0K 0K 78643K 13 0 temp 90 3039K 3103K 78643K 2564 0 kqueue 4 5K 12K 78643K 19 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 8 0 1 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 49 0 4 2 0 2 2 0 8 0 unpcb 120 73 0 63 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 415 0 415 1 1 0 1 0 8 0 tcpcb 544 88 0 84 1 0 1 1 0 8 0 inpcb 280 154 0 147 2 0 2 2 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 pffrent 40 4 0 4 2 1 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 16 0 2 1 0 1 1 0 8 0 pfstkey 112 16 0 2 1 0 1 1 0 8 0 pfstate 328 16 0 2 2 0 2 2 0 8 0 pfrule 1360 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 198 0 2 13 0 13 13 0 8 0 art_table 32 199 0 2 2 0 2 2 0 8 0 art_node 16 48 0 7 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 7 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 10 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1549 0 143 89 0 89 89 0 8 0 ffsino 272 1549 0 143 94 0 94 94 0 8 0 nchpl 144 1881 0 276 60 0 60 60 0 8 0 uvmvnodes 72 1620 0 0 30 0 30 30 0 8 0 vnodes 208 1620 0 0 86 0 86 86 0 8 0 namei 1024 5023 0 5023 1 0 1 1 0 8 1 percpumem 16 33 0 1 1 0 1 1 0 8 0 scxspl 192 5150 0 5150 8 1 7 7 0 8 7 plimitpl 152 27 0 19 1 0 1 1 0 8 0 sigapl 424 334 0 302 4 0 4 4 0 8 0 futexpl 56 1391 0 1391 1 0 1 1 0 8 1 knotepl 112 73 0 54 1 0 1 1 0 8 0 kqueuepl 144 64 0 61 1 0 1 1 0 8 0 pipelkpl 48 83 0 73 1 0 1 1 0 8 0 pipepl 120 166 0 147 1 0 1 1 0 8 0 fdescpl 496 317 0 302 3 0 3 3 0 8 0 filepl 152 1726 0 1626 5 0 5 5 0 8 1 lockfpl 104 42 0 41 1 0 1 1 0 8 0 lockfspl 48 12 0 11 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 24 0 13 1 0 1 1 0 8 0 ucredpl 96 133 0 123 1 0 1 1 0 8 0 zombiepl 144 302 0 302 1 0 1 1 0 8 1 processpl 984 334 0 302 5 0 5 5 0 8 0 procpl 624 554 0 513 4 0 4 4 0 8 0 sosppl 128 5 0 5 1 0 1 1 0 8 1 sockpl 400 254 0 235 3 0 3 3 0 8 1 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 184 0 0 22 0 22 22 0 8 0 mtagpl 80 4 0 0 1 0 1 1 0 8 0 mbufpl 256 213 0 0 13 0 13 13 0 8 0 bufpl 280 3524 0 133 243 0 243 243 0 8 0 anonpl 16 49469 0 35965 69 1 68 68 0 124 13 amapchunkpl 152 1567 0 1439 8 2 6 8 0 158 0 amappl16 192 1621 0 901 49 5 44 47 0 8 8 amappl15 184 54 0 51 1 0 1 1 0 8 0 amappl14 176 23 0 18 1 0 1 1 0 8 0 amappl13 168 25 0 24 1 0 1 1 0 8 0 amappl12 160 64 0 57 1 0 1 1 0 8 0 amappl11 152 51 0 36 1 0 1 1 0 8 0 amappl10 144 21 0 16 1 0 1 1 0 8 0 amappl9 136 418 0 416 1 0 1 1 0 8 0 amappl8 128 383 0 347 2 0 2 2 0 8 0 amappl7 120 119 0 107 1 0 1 1 0 8 0 amappl6 112 23 0 19 1 0 1 1 0 8 0 amappl5 104 229 0 214 1 0 1 1 0 8 0 amappl4 96 487 0 457 1 0 1 1 0 8 0 amappl3 88 105 0 97 1 0 1 1 0 8 0 amappl2 80 1634 0 1571 2 0 2 2 0 8 0 amappl1 72 17339 0 16913 23 13 10 18 0 8 0 amappl 80 793 0 753 2 0 2 2 0 84 1 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 317 0 302 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 317 0 302 1 0 1 1 0 8 0 vmmpekpl 168 6564 0 6531 2 0 2 2 0 8 0 vmmpepl 168 45755 0 43983 110 9 101 105 0 357 18 vmsppl 368 316 0 302 2 0 2 2 0 8 0 pdppl 4096 642 0 604 6 0 6 6 0 8 0 pvpl 32 160120 0 143540 171 0 171 171 0 265 37 pmappl 232 316 0 302 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 258 0 2 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: 0x7f7ffffed640, 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(ffffffff821f63fd) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821f63fd) at panic+0xf3 sys/kern/subr_prf.c:197 pool_cache_get(ffffffff82653a00) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82653a00) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82653a00,2) 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(ffff800000a0c320) at tcp_output+0x14e6 tcp_usrreq(fffffd806eb24c88,9,fffffd806d91fc00,0,0,ffff800020ed1390) at tcp_usrreq+0xa55 end trace frame: 0xffff800020ed7c10, 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(ffffffff821f63fd) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821f63fd) at panic+0xf3 sys/kern/subr_prf.c:197 pool_cache_get(ffffffff82653a00) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82653a00) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82653a00,2) 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(ffff800000a0c320) at tcp_output+0x14e6 tcp_usrreq(fffffd806eb24c88,9,fffffd806d91fc00,0,0,ffff800020ed1390) at tcp_usrreq+0xa55 sosend(fffffd806eb24c88,0,ffff800020ed7cd8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1390,4,ffff800020ed7cd8,0,ffff800020ed7dc0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1390,ffff800020ed7d70,ffff800020ed7dc0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020ed7e40) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ed7e40) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffb9bc0, count: -19