panic: pooWAlR_NcIaNchG:e _SiPtLe mN_mOaT gLiOcW_EcRhEeDck O:N m bSuYfSpClA LcLp u1 37f r-e2e7 7li9s84t EmXodITi fi0 e9d : iStopped at savectx+0xb1: movl $0,%gs:0x530 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 77767 48897 0 0x2 0 0 syz-executor.0 50457 72211 0 0x12 0 1 sshd savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7ffffbc210, 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 0xfffffd807f01e200+16 0x0!=0xb5014d22ff887bee ddb{0}> trace savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7ffffbc210, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800020f6bca0 rbx 0 rdx 0xffff800020e6c4e8 rcx 0 rax 0x39 r8 0xffffffff821c8b5f kprintf+0x16f r9 0x1 r10 0x25 r11 0xd10a056e460f0e8d r12 0 r13 0 r14 0xffff800020e6c4e8 r15 0 rip 0xffffffff818233f1 savectx+0xb1 cs 0x8 rflags 0x46 rsp 0xffff800020f6bc20 ss 0 savectx+0xb1: movl $0,%gs:0x530 ddb{0}> show proc PROC (syz-executor.0) pid=77767 stat=onproc flags process=2 proc=0 pri=17, usrpri=55, nice=20 forw=0xffffffffffffffff, list=0xffff800020e6c278,0xffff800020e6d878 process=0xffff800020e807c0 user=0xffff800020f66000, vmspace=0xfffffd807efff8a0 estcpu=36, cpticks=1, pctcpu=0.5 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 50512 167209 98504 0 2 0x2 syz-executor.1 *48897 77767 98504 0 7 0x2 syz-executor.0 98504 227241 65329 0 3 0x82 kqread syz-fuzzer 98504 107387 65329 0 3 0x4000082 nanosleep syz-fuzzer 98504 122580 65329 0 2 0x4000002 syz-fuzzer 98504 11264 65329 0 3 0x4000082 thrsleep syz-fuzzer 98504 35990 65329 0 3 0x4000082 thrsleep syz-fuzzer 98504 122611 65329 0 3 0x4000082 thrsleep syz-fuzzer 98504 365520 65329 0 3 0x4000082 thrsleep syz-fuzzer 98504 72188 65329 0 3 0x4000082 thrsleep syz-fuzzer 98504 18475 65329 0 2 0x4000002 syz-fuzzer 98504 168260 65329 0 3 0x4000082 thrsleep syz-fuzzer 65329 33962 72211 0 3 0x10008a pause ksh 72211 50457 47637 0 7 0x12 sshd 61723 325157 1 0 3 0x100083 ttyin getty 47637 512749 1 0 3 0x80 select sshd 74872 16557 92117 74 3 0x100092 bpf pflogd 92117 506988 1 0 3 0x80 netio pflogd 12605 479372 34202 73 3 0x100090 kqread syslogd 34202 359198 1 0 3 0x100082 netio syslogd 59230 472847 1 77 3 0x100090 poll dhclient 14561 36172 1 0 3 0x80 poll dhclient 68219 330989 0 0 3 0x14200 bored smr 78537 406052 0 0 3 0x14200 pgzero zerothread 50124 29154 0 0 3 0x14200 aiodoned aiodoned 77634 128519 0 0 3 0x14200 syncer update 64420 501450 0 0 3 0x14200 cleaner cleaner 83249 327676 0 0 3 0x14200 reaper reaper 46078 378679 0 0 3 0x14200 pgdaemon pagedaemon 25060 180851 0 0 3 0x14200 bored crynlk 56883 281609 0 0 3 0x14200 bored crypto 19303 478646 0 0 3 0x40014200 acpi0 acpi0 7328 287339 0 0 3 0x40014200 idle1 66447 174876 0 0 3 0x14200 bored softnet 68569 127059 0 0 3 0x14200 bored systqmp 29195 258026 0 0 3 0x14200 bored systq 401 255300 0 0 3 0x40014200 bored softclock 12588 242902 0 0 3 0x40014200 idle0 1 45679 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_peek+0x2c sys/kern/kern_bufq.c:219 #4 sdstart+0x421 sys/scsi/sd.c:734 #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 50512 (syz-executor.1) thread 0xffff800020e6d868 (167209) exclusive rrwlock inode r = 0 (0xfffffd806b334a28) #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 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b3341a8) #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 domkdirat+0x75 sys/kern/vfs_syscalls.c:3036 #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 48897 (syz-executor.0) thread 0xffff800020e6c4e8 (77767) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8266bb40) #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 (0xfffffd806b334808) #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 (0xfffffd806b3345e8) #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_peek+0x2c sys/kern/kern_bufq.c:219 #4 sdstart+0x421 sys/scsi/sd.c:734 #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 72211 (sshd) thread 0xffff800020ede760 (50457) exclusive rwlock netlock r = 0 (0xffffffff8252c6c8) #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 9489 6530K 6793K 78643K 10784 0 pcb 13 8K 8K 78643K 43 0 rtable 99 3K 3K 78643K 239 0 ifaddr 48 11K 12K 78643K 80 0 counters 43 33K 34K 78643K 53 0 ioctlops 0 0K 4K 78643K 1476 0 iov 0 0K 12K 78643K 35 0 mount 1 1K 1K 78643K 1 0 vnodes 1235 78K 78K 78643K 1291 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 10 0K 0K 78643K 12 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 4 9K 25K 78643K 84 0 proc 61 63K 95K 78643K 440 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 3 0 in_multi 29 1K 2K 78643K 41 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 31 148K 148K 78643K 31 0 exec 0 0K 1K 78643K 211 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 23K 23K 78643K 1204 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 8 0 NDP 7 0K 0K 78643K 17 0 temp 76 3037K 3101K 78643K 2207 0 kqueue 3 4K 7K 78643K 5 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 21 0 19 1 0 1 1 0 8 0 rtentry 112 49 0 8 2 0 2 2 0 8 0 unpcb 120 47 0 37 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 36 0 32 1 0 1 1 0 8 0 inpcb 280 133 0 126 2 0 2 2 0 8 1 nd6 48 7 0 3 1 0 1 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 17 0 0 1 0 1 1 0 8 0 pfstkey 112 17 0 0 1 0 1 1 0 8 0 pfstate 328 17 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 256 213 0 40 13 0 13 13 0 8 0 art_table 32 214 0 40 2 0 2 2 0 8 0 art_node 16 48 0 10 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 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 1516 0 113 89 0 89 89 0 8 0 ffsino 272 1516 0 113 94 0 94 94 0 8 0 nchpl 144 1809 0 206 60 0 60 60 0 8 0 uvmvnodes 72 1617 0 0 30 0 30 30 0 8 0 vnodes 208 1617 0 0 86 0 86 86 0 8 0 namei 1024 4792 0 4791 1 0 1 1 0 8 0 percpumem 16 37 0 5 1 0 1 1 0 8 0 vcpupl 1984 1 0 0 1 0 1 1 0 8 0 vmpool 560 1 0 0 1 0 1 1 0 8 0 scxspl 192 4691 0 4691 8 1 7 7 0 8 7 plimitpl 152 17 0 9 1 0 1 1 0 8 0 sigapl 424 299 0 269 4 0 4 4 0 8 0 futexpl 56 998 0 998 1 0 1 1 0 8 1 knotepl 112 64 0 45 1 0 1 1 0 8 0 kqueuepl 144 14 0 12 1 0 1 1 0 8 0 pipelkpl 48 95 0 85 1 0 1 1 0 8 0 pipepl 120 190 0 171 1 0 1 1 0 8 0 fdescpl 496 284 0 269 3 0 3 3 0 8 0 filepl 152 1562 0 1462 5 0 5 5 0 8 1 lockfpl 104 47 0 46 1 0 1 1 0 8 0 lockfspl 48 21 0 20 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 88 0 79 1 0 1 1 0 8 0 zombiepl 144 269 0 269 1 0 1 1 0 8 1 processpl 984 299 0 269 5 0 5 5 0 8 1 procpl 624 423 0 384 4 0 4 4 0 8 1 sockpl 400 201 0 182 3 0 3 3 0 8 1 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 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 141 0 0 17 0 17 17 0 8 0 mtagpl 80 5 0 0 1 0 1 1 0 8 0 mbufpl 256 167 0 0 10 0 10 10 0 8 0 bufpl 280 3353 0 133 230 0 230 230 0 8 0 anonpl 16 43457 0 29808 71 1 70 70 0 124 14 amapchunkpl 152 1427 0 1297 8 1 7 8 0 158 1 amappl16 192 1287 0 554 48 0 48 48 0 8 9 amappl15 184 28 0 26 1 0 1 1 0 8 0 amappl14 176 25 0 20 1 0 1 1 0 8 0 amappl13 168 26 0 25 1 0 1 1 0 8 0 amappl12 160 44 0 38 1 0 1 1 0 8 0 amappl11 152 55 0 38 1 0 1 1 0 8 0 amappl10 144 18 0 15 1 0 1 1 0 8 0 amappl9 136 385 0 382 1 0 1 1 0 8 0 amappl8 128 349 0 314 2 0 2 2 0 8 0 amappl7 120 126 0 115 1 0 1 1 0 8 0 amappl6 112 29 0 23 1 0 1 1 0 8 0 amappl5 104 187 0 172 1 0 1 1 0 8 0 amappl4 96 491 0 461 1 0 1 1 0 8 0 amappl3 88 104 0 97 1 0 1 1 0 8 0 amappl2 80 1301 0 1239 2 0 2 2 0 8 0 amappl1 72 16353 0 15930 23 9 14 18 0 8 4 amappl 80 670 0 628 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 285 0 269 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 285 0 269 1 0 1 1 0 8 0 vmmpekpl 168 6229 0 6197 2 0 2 2 0 8 0 vmmpepl 168 41556 0 39767 106 6 100 101 0 357 13 vmsppl 368 284 0 269 2 0 2 2 0 8 0 pdppl 4096 578 0 539 6 0 6 6 0 8 0 pvpl 32 147097 0 130914 170 0 170 170 0 265 37 pmappl 232 284 0 269 3 1 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 250 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: 0x7f7ffffbc210, 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x3c sys/arch/amd64/amd64/bus_space.c:639 comcnputc(800,69) at comcnputc+0x1c8 sys/dev/ic/com.c:1260 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(ffffffff821f88ca) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821f88ca) at panic+0xf3 sys/kern/subr_prf.c:197 pool_cache_get(ffffffff82646178) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82646178) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82646178,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd807c50b700,0,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd807c50b700,0,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000a0a880) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eb34968,9,fffffd807c50b700,0,0,ffff800020ede760) at tcp_usrreq+0xa55 end trace frame: 0xffff800020ecfb80, 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x3c sys/arch/amd64/amd64/bus_space.c:639 comcnputc(800,69) at comcnputc+0x1c8 sys/dev/ic/com.c:1260 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(ffffffff821f88ca) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821f88ca) at panic+0xf3 sys/kern/subr_prf.c:197 pool_cache_get(ffffffff82646178) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82646178) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82646178,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd807c50b700,0,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd807c50b700,0,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000a0a880) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eb34968,9,fffffd807c50b700,0,0,ffff800020ede760) at tcp_usrreq+0xa55 sosend(fffffd806eb34968,0,ffff800020ecfc48,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ede760,4,ffff800020ecfc48,0,ffff800020ecfd30) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ede760,ffff800020ecfce0,ffff800020ecfd30) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020ecfdb0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ecfdb0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcda60, count: -19