panic(ffffffff8240079e) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82922ed8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82922ed8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82922ed8,1) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(1,1) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 m_getuio(ffff800020e62e98,0,4244,ffff800020e63018) at m_getuio+0xe4 sys/kern/uipc_socket.c:587 sosend(fffffd806eae9af8,0,ffff800020e63018,0,0,80) at sosend+0x54e sys/kern/uipc_socket.c:542 dofilewritev(ffff800020e409d0,4,ffff800020e63018,0,ffff800020e63100) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020e409d0,ffff800020e630b0,ffff800020e63100) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e63180) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e63180) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcf0b0, count: 4 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 0xfffffd806d391b00+16 0x0!=0x594b199355c85ad3 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240079e) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82922ed8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82922ed8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82922ed8,1) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(1,1) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 m_getuio(ffff800020e62e98,0,4244,ffff800020e63018) at m_getuio+0xe4 sys/kern/uipc_socket.c:587 sosend(fffffd806eae9af8,0,ffff800020e63018,0,0,80) at sosend+0x54e sys/kern/uipc_socket.c:542 dofilewritev(ffff800020e409d0,4,ffff800020e63018,0,ffff800020e63100) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020e409d0,ffff800020e630b0,ffff800020e63100) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e63180) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e63180) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcf0b0, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e62bc0 rbx 0xffff800020e62c70 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff811f12ff kprintf+0x16f r9 0x1 r10 0x2 r11 0xd3cab1db3a7fd0ca r12 0x3000000008 r13 0xffff800020e62bd0 r14 0x100 r15 0x1 rip 0xffffffff81bdc9e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e62bb0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (sshd) pid=407534 stat=onproc flags process=12 proc=0 pri=50, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020e40280,0xffff800020e41af0 process=0xffff800020e383f0 user=0xffff800020e5e000, vmspace=0xfffffd806e8fca18 estcpu=1, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 35023 245694 38668 0 3 0x80 fsleep syz-executor.0 35023 151802 38668 0 3 0x4000080 fsleep syz-executor.0 35023 321644 38668 0 7 0x4000000 syz-executor.0 33744 496783 11598 0 3 0x2 biowait syz-executor.1 44052 36670 0 0 3 0x14200 acct acct 38668 481194 11598 0 3 0x82 nanosleep syz-executor.0 32959 277487 0 0 3 0x14200 bored sosplice 11598 35493 10699 0 3 0x82 thrsleep syz-fuzzer 11598 253127 10699 0 3 0x4000082 nanosleep syz-fuzzer 11598 347101 10699 0 3 0x4000082 thrsleep syz-fuzzer 11598 401814 10699 0 3 0x4000082 thrsleep syz-fuzzer 11598 333551 10699 0 3 0x4000082 nanosleep syz-fuzzer 11598 245336 10699 0 3 0x4000082 thrsleep syz-fuzzer 11598 374575 10699 0 3 0x4000082 kqread syz-fuzzer 11598 197087 10699 0 3 0x4000082 thrsleep syz-fuzzer 11598 521417 10699 0 3 0x4000082 thrsleep syz-fuzzer 11598 392235 10699 0 3 0x4000082 thrsleep syz-fuzzer 10699 334923 89870 0 3 0x10008a pause ksh *89870 407534 36480 0 7 0x12 sshd 92910 151080 1 0 3 0x100083 ttyin getty 36480 365023 1 0 3 0x80 select sshd 88457 223104 27807 74 3 0x100092 bpf pflogd 27807 502783 1 0 3 0x80 netio pflogd 51249 211769 69012 73 3 0x100090 kqread syslogd 69012 58257 1 0 3 0x100082 netio syslogd 32330 81537 1 77 3 0x100090 poll dhclient 36476 402381 1 0 3 0x80 poll dhclient 1950 22754 0 0 3 0x14200 bored smr 78219 378611 0 0 3 0x14200 pgzero zerothread 49358 49493 0 0 3 0x14200 aiodoned aiodoned 11007 84950 0 0 3 0x14200 syncer update 82027 173094 0 0 3 0x14200 cleaner cleaner 78236 449324 0 0 3 0x14200 reaper reaper 48090 363200 0 0 3 0x14200 pgdaemon pagedaemon 28405 358158 0 0 3 0x14200 bored crynlk 22096 72585 0 0 3 0x14200 bored crypto 6184 113984 0 0 3 0x40014200 acpi0 acpi0 25646 280705 0 0 3 0x40014200 idle1 3119 140697 0 0 3 0x14200 bored softnet 54349 361197 0 0 3 0x14200 bored systqmp 40550 510458 0 0 3 0x14200 bored systq 48341 130362 0 0 3 0x40014200 bored softclock 45117 400240 0 0 3 0x40014200 idle0 1 303998 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex pvpl r = 0 (0xffffffff82924958) #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 pool_get+0xbf sys/kern/subr_pool.c:578 #4 pmap_enter+0x16e #5 uvm_fault+0x10f0 sys/uvm/uvm_fault.c:1217 #6 pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221 #7 usertrap+0x21a sys/arch/amd64/amd64/trap.c:384 #8 recall_trap+0x8 Process 35023 (syz-executor.0) thread 0xffff800020e23d58 (245694) shared rwlock vmmaplk r = 0 (0xfffffd806979c198) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1448 #2 uvm_fault+0xd85 sys/uvm/uvm_fault.c:524 #3 pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221 #4 usertrap+0x21a sys/arch/amd64/amd64/trap.c:384 #5 recall_trap+0x8 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828f9040) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 #2 usertrap+0x21a sys/arch/amd64/amd64/trap.c:384 #3 recall_trap+0x8 Process 33744 (syz-executor.1) thread 0xffff800020e23128 (496783) exclusive rrwlock inode r = 0 (0xfffffd80647fad60) #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 (0xfffffd80647fa920) #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9521 6416K 6672K 78643K 11103 0 pcb 13 8K 8K 78643K 64 0 rtable 97 5K 8K 78643K 556 0 ifaddr 83 17K 17K 78643K 179 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 65 0 ioctlops 0 0K 4K 78643K 1555 0 iov 0 0K 17K 78643K 61 0 mount 1 1K 1K 78643K 1 0 vnodes 1216 76K 77K 78643K 1426 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 110 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 455 0 sigio 0 0K 0K 78643K 6 0 proc 61 63K 83K 78643K 540 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 13 0 in_multi 45 2K 3K 78643K 130 0 ether_multi 1 0K 0K 78643K 5 0 mrt 0 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 250 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 54K 69K 78643K 2323 0 UVM aobj 13 2K 2K 78643K 15 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 51 0 NDP 12 0K 0K 78643K 38 0 temp 111 3868K 3932K 78643K 5833 0 kqueue 3 4K 16K 78643K 70 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 10 0 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 44 0 42 1 0 1 1 0 8 0 rtentry 112 94 0 61 2 0 2 2 0 8 0 unpcb 120 260 0 250 1 0 1 1 0 8 0 syncache 264 5 0 5 2 2 0 1 0 8 0 tcpqe 32 9 0 9 1 1 0 1 0 8 0 tcpcb 544 267 0 263 1 0 1 1 0 8 0 inpcb 296 800 0 792 8 6 2 2 0 8 0 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 25 0 21 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 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 7 0 7 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 pfrktable 1344 60 0 56 1 0 1 1 0 8 0 pfstitem 24 12 0 10 1 0 1 1 0 8 0 pfstkey 112 14 0 12 1 0 1 1 0 8 0 pfstate 328 13 0 11 2 1 1 2 0 8 0 pfrule 1360 35 0 23 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 402 0 236 16 4 12 13 0 8 0 art_table 32 403 0 236 2 0 2 2 0 8 0 art_node 16 93 0 65 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 8 1 0 1 1 0 8 0 semapl 112 108 0 98 1 0 1 1 0 8 0 shmpl 112 13 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1977 0 571 89 0 89 89 0 8 0 ffsino 272 1977 0 571 95 0 95 95 0 8 0 nchpl 144 2767 0 1169 60 0 60 60 0 8 0 uvmvnodes 72 2172 0 0 40 0 40 40 0 8 0 vnodes 208 2172 0 0 115 0 115 115 0 8 0 namei 1024 8256 0 8256 1 0 1 1 0 8 1 percpumem 16 43 0 11 1 0 1 1 0 8 0 vcpupl 1984 6 0 0 1 0 1 1 0 8 0 vmpool 560 7 0 1 1 0 1 1 0 8 0 pfiaddrpl 120 16 0 14 2 1 1 1 0 8 0 scxspl 192 9732 0 9731 12 9 3 7 0 8 2 plimitpl 152 49 0 41 1 0 1 1 0 8 0 sigapl 424 666 0 633 4 0 4 4 0 8 0 futexpl 56 10707 0 10705 1 0 1 1 0 8 0 knotepl 112 198 0 179 1 0 1 1 0 8 0 kqueuepl 144 224 0 222 1 0 1 1 0 8 0 pipepl 304 121 0 111 2 1 1 2 0 8 0 fdescpl 496 649 0 633 3 0 3 3 0 8 0 filepl 152 4252 0 4150 5 0 5 5 0 8 1 lockfpl 104 96 0 95 1 0 1 1 0 8 0 lockfspl 48 37 0 36 1 0 1 1 0 8 0 sessionpl 112 20 0 9 1 0 1 1 0 8 0 pgrppl 48 25 0 14 1 0 1 1 0 8 0 ucredpl 96 707 0 698 1 0 1 1 0 8 0 zombiepl 144 633 0 633 1 0 1 1 0 8 1 processpl 984 666 0 633 5 0 5 5 0 8 0 procpl 624 1447 0 1403 4 0 4 4 0 8 0 sosppl 128 8 0 8 5 5 0 1 0 8 0 sockpl 400 1115 0 1095 4 1 3 4 0 8 1 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 12 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 173 0 0 21 1 20 21 0 8 0 mtagpl 96 21 0 0 1 0 1 1 0 8 0 mbufpl 256 341 0 0 13 0 13 13 0 8 0 bufpl 280 5457 0 135 381 0 381 381 0 8 0 anonpl 16 116612 0 100175 98 26 72 81 0 124 0 amapchunkpl 152 4192 0 4038 26 12 14 14 0 158 5 amappl16 192 5119 0 4190 61 11 50 55 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 177 0 170 1 0 1 1 0 8 0 amappl13 168 55 0 49 1 0 1 1 0 8 0 amappl12 160 6 0 6 2 2 0 1 0 8 0 amappl11 152 214 0 197 1 0 1 1 0 8 0 amappl10 144 32 0 25 1 0 1 1 0 8 0 amappl9 136 592 0 591 1 0 1 1 0 8 0 amappl8 128 397 0 368 2 0 2 2 0 8 0 amappl7 120 149 0 136 1 0 1 1 0 8 0 amappl6 112 29 0 23 1 0 1 1 0 8 0 amappl5 104 386 0 371 1 0 1 1 0 8 0 amappl4 96 670 0 636 1 0 1 1 0 8 0 amappl3 88 278 0 271 1 0 1 1 0 8 0 amappl2 80 4077 0 4007 2 0 2 2 0 8 0 amappl1 72 23776 0 23328 23 13 10 18 0 8 0 amappl 80 1741 0 1696 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 14 0 2 1 0 1 1 0 8 0 uaddrrnd 24 656 0 634 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 656 0 634 1 0 1 1 0 8 0 vmmpekpl 168 8051 0 8013 2 0 2 2 0 8 0 vmmpepl 168 88121 0 85976 168 34 134 134 0 357 35 vmsppl 368 655 0 634 3 0 3 3 0 8 0 pdppl 4096 1319 0 1274 9 2 7 7 0 8 1 pvpl 32 316960 0 298110 224 51 173 189 0 265 6 pmappl 232 655 0 634 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 269 0 11 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240079e) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82922ed8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82922ed8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82922ed8,1) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(1,1) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 m_getuio(ffff800020e62e98,0,4244,ffff800020e63018) at m_getuio+0xe4 sys/kern/uipc_socket.c:587 sosend(fffffd806eae9af8,0,ffff800020e63018,0,0,80) at sosend+0x54e sys/kern/uipc_socket.c:542 dofilewritev(ffff800020e409d0,4,ffff800020e63018,0,ffff800020e63100) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020e409d0,ffff800020e630b0,ffff800020e63100) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e63180) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e63180) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcf0b0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d70ff0) 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(800,66) at comcnputc+0xb8 sys/dev/ic/com.c:1250 cnputc(66) at cnputc+0x4c sys/dev/cons.c:239 kputchar(66,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052 panic(ffffffff823fc5b5) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff823fc5b5) at panic+0xf3 sys/kern/subr_prf.c:197 __assert(ffffffff8246a9b4,ffffffff824528e1,29e,ffffffff8242edd6) at __assert+0x2b sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: 4 ddb{1}> trace x86_ipi_db(ffff800020d70ff0) 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(800,66) at comcnputc+0xb8 sys/dev/ic/com.c:1250 cnputc(66) at cnputc+0x4c sys/dev/cons.c:239 kputchar(66,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052 panic(ffffffff823fc5b5) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff823fc5b5) at panic+0xf3 sys/kern/subr_prf.c:197 __assert(ffffffff8246a9b4,ffffffff824528e1,29e,ffffffff8242edd6) at __assert+0x2b sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: -11