uvm_fault(0xfffffd800b0271e8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82b512c8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002f3da670 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82b512c8 Starting stack trace... panic(ffffffff833bf901) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002f3da5c0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001486000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffe9780) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffe9780) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002f3da770) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8064b64de0,81,fffffd80097fb1a0,ffff8000fffe9780) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c11ed60,ffff8000fffe9780) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c11ed60,ffff8000fffe9780) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c11ed60,ffff8000fffe9780) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c11ed60,ffff8000fffe9780) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe9780) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe9780,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9780,ffff80002f3daae0,ffff80002f3daa30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002f3daae0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002f3daae0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77f77658e520, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 334578 44735 0 0 0x4000000 0 syz-executor *314578 24696 0 0 0 1 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7bf657ba41c0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd800b0271e8, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7bf657ba41c0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000387f8da0 rbx 0 rdx 0 rcx 0xffff80002a272d08 rax 0x2a r8 0xffff8000387f8cd0 r9 0x1 r10 0xa6cfcfdb97bc53e3 r11 0x7c63b0b6814d25ef r12 0 r13 0xffffffff82af5b68 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff831634c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff8000387f8d20 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=314578 pid=24696 tcnt=2 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe9780,0xffff8000fffe9cc0 process=0xffff8000fffec9b8 user=0xffff8000387f3000, vmspace=0xfffffd806c2567b8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 44735 222364 87782 0 2 0 syz-executor 44735 334578 87782 0 7 0x4000000 syz-executor *24696 314578 5320 0 7 0 syz-executor 24696 368304 5320 0 2 0x4000000 syz-executor 79090 97439 52061 0 3 0x80 nanoslp syz-executor 79090 350870 52061 0 3 0x4000080 lockf syz-executor 79090 489355 52061 0 3 0x4000080 fsleep syz-executor 41220 50671 47170 60928 3 0x90 nanoslp syz-executor 41220 80241 47170 60928 3 0x4000090 kqread syz-executor 41220 193381 47170 60928 3 0x4000090 kqsel syz-executor 41220 362399 47170 60928 3 0x4000090 fsleep syz-executor 18602 282400 0 0 3 0x14200 acct acct 53370 425190 638 0 3 0x82 nanoslp syz-executor 5320 464577 638 0 3 0x82 nanoslp syz-executor 27244 135705 638 0 3 0x82 nanoslp syz-executor 87782 200533 638 0 3 0x82 nanoslp syz-executor 47170 291975 638 0 3 0x82 nanoslp syz-executor 70530 48965 638 0 3 0x2 biowait syz-executor 12960 180891 638 0 3 0x82 nanoslp syz-executor 52061 15932 638 0 3 0x82 nanoslp syz-executor 638 359550 12913 0 3 0x82 kqread syz-executor 12913 166569 82668 0 3 0x10008a sigsusp ksh 82668 418096 90483 0 3 0x98 kqread sshd-session 90483 292253 65018 0 3 0x92 kqread sshd-session 38131 119738 1 0 3 0x100083 ttyin getty 65018 277219 1 0 3 0x88 kqread sshd 54732 180567 56252 74 3 0x1100092 bpf pflogd 56252 280463 1 0 3 0x80 sbwait pflogd 78271 448831 66640 73 3 0x1100090 kqread syslogd 66640 70504 1 0 3 0x100082 sbwait syslogd 76062 223719 1 0 3 0x100080 kqread resolvd 48754 498841 1737 77 3 0x100092 kqread dhcpleased 21661 164503 1737 77 3 0x100092 kqread dhcpleased 1737 259541 1 0 3 0x80 kqread dhcpleased 24324 151489 0 0 3 0x14200 pause smr 24380 277796 0 0 3 0x14200 pgzero zerothread 13610 58530 0 0 3 0x14200 aiodoned aiodoned 58133 56343 0 0 3 0x14200 syncer update 45190 127869 0 0 3 0x14200 cleaner cleaner 74065 202695 0 0 3 0x14200 reaper reaper 41708 445065 0 0 3 0x14200 pgdaemon pagedaemon 56873 357467 0 0 3 0x14200 bored viomb 70542 163984 0 0 3 0x40014200 acpi0 acpi0 39467 38328 0 0 3 0x40014200 idle1 8960 55910 0 0 3 0x14200 bored softnet1 97881 442568 0 0 3 0x14200 netlock softnet0 71936 82654 0 0 2 0x40014200 systqmp 96306 232416 0 0 3 0x14200 bored systq 1512 316146 0 0 3 0x14200 tmoslp softclockmp 7753 244462 0 0 3 0x40014200 tmoslp softclock 171 518767 0 0 3 0x40014200 idle0 1 138848 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 44735 (syz-executor) thread 0xffff8000fffe9cb0 (222364) exclusive rwlock uobjlk r = 0 (0xfffffd806d9dbd20) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1214 #3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1348 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:622 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806c256c88) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1902 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:622 #7 recall_trap+0x8 Process 70530 (syz-executor) thread 0xffff80002a28e2b0 (48965) exclusive rrwlock inode r = 0 (0xfffffd806bfd9580) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c3ed698) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10224 11257K 11411K 166960K 11766 0 pcb 20 14K 16K 166960K 157 0 rtable 241 9K 9K 166960K 441 0 pf 38 18K 18K 166960K 73 0 ifaddr 45 8K 8K 166960K 58 0 ifgroup 60 2K 2K 166960K 90 0 sysctl 2 1K 9K 166960K 10 0 counters 72 37K 38K 166960K 90 0 ioctlops 0 0K 4K 166960K 1529 0 iov 0 0K 12K 166960K 13 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1431 90K 90K 166960K 1752 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 23 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 502 0 sigio 0 0K 0K 166960K 7 0 proc 72 115K 196K 166960K 570 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 64 0 in_multi 96 7K 7K 166960K 120 0 ether_multi 1 0K 0K 166960K 6 0 mrt 2 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 403 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 239 159K 177K 166960K 6305 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 42 84K 104K 166960K 1648 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 23 0 NDP 13 0K 2K 166960K 35 0 temp 56 8654K 8723K 166960K 21708 0 kqueue 14 22K 28K 166960K 88 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 94 0 90 2 0 2 2 0 8 1 rtentry 176 127 0 23 6 0 6 6 0 8 0 unpcb 144 200 0 182 2 0 2 2 0 8 1 syncache 336 6 0 6 1 1 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 194 0 189 7 6 1 7 0 8 0 arp 136 20 0 1 1 0 1 1 0 8 0 inpcb 328 527 0 514 12 5 7 7 0 8 5 nd6 152 26 0 0 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 5 0 4 2 1 1 1 0 8 0 pppxif 1504 2 0 1 2 1 1 1 0 8 0 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pffrag 232 22 0 20 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 44 0 41 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 2 0 2 1 1 0 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 44 0 1 1 0 1 1 0 8 0 pfstkey 128 45 0 2 2 0 2 2 0 8 0 pfstate 384 45 0 2 5 0 5 5 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 544 0 115 31 2 29 31 0 8 1 art_table 40 548 0 115 5 0 5 5 0 8 0 art_node 32 127 0 36 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0 semapl 112 19 0 9 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2231 0 721 95 0 95 95 0 8 0 ffsino 296 2231 0 721 117 0 117 117 0 8 0 nchpl 144 2922 0 1222 64 0 64 64 0 8 0 vnodes 216 2565 0 0 143 0 143 143 0 8 0 namei 1024 9713 0 9712 2 1 1 2 0 8 0 percpumem 16 60 0 9 1 0 1 1 0 8 0 kstatmem 264 40 0 12 3 1 2 3 0 8 0 scsiplug 72 5 0 5 2 1 1 1 0 8 1 scxspl 216 13819 0 13818 9 8 1 8 1 8 0 plimitpl 152 181 0 162 1 0 1 1 0 8 0 sigapl 424 798 0 750 7 1 6 7 0 8 0 knotepl 120 299 0 0 10 0 10 10 0 8 0 kqueuepl 224 265 0 254 9 4 5 5 0 8 4 pipepl 344 146 0 118 3 0 3 3 0 8 0 fdescpl 528 781 0 750 3 0 3 3 0 8 0 filepl 160 4414 0 4187 15 2 13 13 0 8 2 lockfpl 104 159 0 154 1 0 1 1 0 8 0 lockfspl 48 75 0 71 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 37 0 20 1 0 1 1 0 8 0 ucredpl 104 488 0 474 1 0 1 1 0 8 0 zombiepl 144 753 0 750 1 0 1 1 0 8 0 processpl 1232 798 0 750 5 1 4 5 0 8 0 procpl 664 1376 0 1321 6 0 6 6 0 8 0 sosppl 176 6 0 6 1 0 1 1 0 8 1 sockpl 752 842 0 807 15 5 10 10 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 169 0 0 11 0 11 11 0 8 0 bufpl 280 6328 0 191 439 0 439 439 0 8 0 anonpl 32 12041 0 0 98 0 98 98 0 246 0 amapchunkpl 152 19391 0 18920 34 7 27 28 0 158 7 amappl16 200 2647 0 2616 31 19 12 28 0 8 8 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 5 0 5 1 1 0 1 0 8 0 amappl13 176 434 0 433 1 0 1 1 0 8 0 amappl12 168 1157 0 1115 3 0 3 3 0 8 0 amappl11 160 48 0 48 1 1 0 1 0 8 0 amappl10 152 49 0 35 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 71 0 69 1 0 1 1 0 8 0 amappl7 128 81 0 79 1 0 1 1 0 8 0 amappl6 120 285 0 272 1 0 1 1 0 8 0 amappl5 112 78 0 65 1 0 1 1 0 8 0 amappl4 104 443 0 415 1 0 1 1 0 8 0 amappl3 96 3307 0 3220 3 0 3 3 0 8 0 amappl2 88 920 0 843 2 0 2 2 0 8 0 amappl1 80 11445 0 10854 15 1 14 15 0 8 0 amappl 88 5475 0 5312 5 0 5 5 0 92 0 uvmvnodes 80 2565 0 0 53 0 53 53 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 781 0 750 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 781 0 750 1 0 1 1 0 8 0 vmmpekpl 168 8237 0 8196 3 0 3 3 0 8 0 vmmpepl 168 57458 0 55547 108 0 108 108 0 357 19 vmsppl 488 780 0 750 5 1 4 5 0 8 0 rwobjpl 80 21110 0 17630 78 0 78 78 0 8 0 pdppl 4096 1569 0 1500 109 38 71 83 0 8 2 pvpl 32 21204 0 0 172 1 171 171 0 265 0 pmappl 256 780 0 750 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 293 0 51 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83803ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff838af470) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838af470) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003ac09fe0,ffff80000006ac00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff838af470) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838af470) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003ac0a140,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838af470) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838af470) at __mp_lock+0x199 sys/kern/kern_lock.c:165 vn_write(fffffd806bed10e8,ffff80003ac0a378,0) at vn_write+0x4e sys/kern/vfs_vnops.c:393 dofilewritev(ffff8000fffe8a88,c8,ffff80003ac0a378,0,ffff80003ac0a430) at dofilewritev+0x242 sys/kern/sys_generic.c:380 sys_write(ffff8000fffe8a88,ffff80003ac0a4e0,ffff80003ac0a430) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff80003ac0a4e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003ac0a4e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 end trace frame: 0xffff80003ac0a560, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83803ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff838af470) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838af470) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003ac09fe0,ffff80000006ac00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff838af470) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838af470) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003ac0a140,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838af470) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838af470) at __mp_lock+0x199 sys/kern/kern_lock.c:165 vn_write(fffffd806bed10e8,ffff80003ac0a378,0) at vn_write+0x4e sys/kern/vfs_vnops.c:393 dofilewritev(ffff8000fffe8a88,c8,ffff80003ac0a378,0,ffff80003ac0a430) at dofilewritev+0x242 sys/kern/sys_generic.c:380 sys_write(ffff8000fffe8a88,ffff80003ac0a4e0,ffff80003ac0a430) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff80003ac0a4e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003ac0a4e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7aed9aca3d0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7bf657ba41c0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7bf657ba41c0, count: -1