uvm_fault(0xfffffd806bd26ad0, 0xf, 0, 1) -> e kernel: page fault trap, code=0 Stopped at ktrops+0x58: movq 0x10(%r14),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 93202 55228 0 0 0x4000000 0K syz-executor 336072 4810 0 0x2 0x1 1 syz-executor ktrops(ffff8000ffff4f88,ffffffffffffffff,0,80000b1c,fffffd806b3c37a0,fffffd807f7d2548) at ktrops+0x58 ktrcanset sys/kern/kern_ktrace.c:727 [inline] ktrops(ffff8000ffff4f88,ffffffffffffffff,0,80000b1c,fffffd806b3c37a0,fffffd807f7d2548) at ktrops+0x58 sys/kern/kern_ktrace.c:570 doktrace(fffffd806b3c37a0,4,b1c,0,ffff8000ffff4f88) at doktrace+0x6dd ktrsetchildren sys/kern/kern_ktrace.c:595 [inline] doktrace(fffffd806b3c37a0,4,b1c,0,ffff8000ffff4f88) at doktrace+0x6dd sys/kern/kern_ktrace.c:517 sys_ktrace(ffff8000ffff4f88,ffff800035cacd10,ffff800035cacc60) at sys_ktrace+0x11c sys/kern/kern_ktrace.c:558 syscall(ffff800035cacd10) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800035cacd10) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1bb06454b80, count: 10 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 *cpu0: uvm_fault(0xfffffd806bd26ad0, 0xf, 0, 1) -> e ddb{0}> trace ktrops(ffff8000ffff4f88,ffffffffffffffff,0,80000b1c,fffffd806b3c37a0,fffffd807f7d2548) at ktrops+0x58 ktrcanset sys/kern/kern_ktrace.c:727 [inline] ktrops(ffff8000ffff4f88,ffffffffffffffff,0,80000b1c,fffffd806b3c37a0,fffffd807f7d2548) at ktrops+0x58 sys/kern/kern_ktrace.c:570 doktrace(fffffd806b3c37a0,4,b1c,0,ffff8000ffff4f88) at doktrace+0x6dd ktrsetchildren sys/kern/kern_ktrace.c:595 [inline] doktrace(fffffd806b3c37a0,4,b1c,0,ffff8000ffff4f88) at doktrace+0x6dd sys/kern/kern_ktrace.c:517 sys_ktrace(ffff8000ffff4f88,ffff800035cacd10,ffff800035cacc60) at sys_ktrace+0x11c sys/kern/kern_ktrace.c:558 syscall(ffff800035cacd10) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800035cacd10) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1bb06454b80, count: -5 ddb{0}> show registers rdi 0xffff80002c095000 rsi 0x1182 __ALIGN_SIZE+0x182 rbp 0xffff800035caca30 rbx 0xfffffd807f7d2548 rdx 0xffff80002c095000 rcx 0x1181 __ALIGN_SIZE+0x181 rax 0xffffffff817fce83 ktrops+0x43 r8 0xfffffd806b3c37a0 r9 0xfffffd807f7d2548 r10 0x20e3e5a6443c00c1 r11 0x60ab36ef00d4acab r12 0xffff8000ffff4f88 r13 0xffffffffffffffff r14 0xffffffffffffffff r15 0x80000b1c __kernel_virt_to_phys+0xb1c rip 0xffffffff817fce98 ktrops+0x58 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800035cac9b0 ss 0x10 ktrops+0x58: movq 0x10(%r14),%r14 ddb{0}> show proc PROC (syz-executor) tid=93202 pid=55228 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=62, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff5218,0xffff8000ffff4038 process=0xffff8000ffff2978 user=0xffff800035ca7000, vmspace=0xfffffd806bd26ad0 estcpu=12, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 7102 398458 22282 0 2 0 syz-executor 7102 300664 22282 0 3 0x4000080 fsleep syz-executor 7102 348442 22282 0 3 0x4000080 fsleep syz-executor 55228 203576 25208 0 2 0 syz-executor *55228 93202 25208 0 7 0x4000000 syz-executor 91602 419807 21842 0 2 0x480 syz-executor 91602 136567 21842 0 3 0x4000080 fifor syz-executor 91602 62846 21842 0 3 0x4000080 fsleep syz-executor 91602 151987 21842 0 3 0x4000080 fsleep syz-executor 2226 145607 55431 0 3 0x100082 sbwait arp 55431 71395 61227 0 3 0x10008a sigsusp sh 4810 336072 89766 0 7 0x3 syz-executor 51487 325924 89766 0 2 0x2 syz-executor 25208 449392 89766 0 2 0x482 syz-executor 61227 42366 89766 0 3 0x82 wait syz-executor 21842 241423 89766 0 3 0x82 nanoslp syz-executor 69400 349352 89766 0 2 0x2 syz-executor 15035 173819 89766 0 2 0x482 syz-executor 22282 298804 89766 0 2 0x482 syz-executor 89766 217487 56612 0 2 0x82 syz-executor 56612 440090 26812 0 3 0x10008a sigsusp ksh 26812 27023 86574 0 3 0x98 kqread sshd-session 86574 362989 72820 0 3 0x92 kqread sshd-session 90564 272654 1 0 3 0x100083 ttyin getty 72820 32056 1 0 3 0x88 kqread sshd 17964 496067 18430 74 3 0x1100092 bpf pflogd 18430 129943 1 0 3 0x80 sbwait pflogd 72211 272338 38273 73 3 0x1100090 kqread syslogd 38273 514599 1 0 3 0x100082 sbwait syslogd 63117 470980 1 0 3 0x100080 kqread resolvd 48376 218012 1842 77 3 0x100092 kqread dhcpleased 34366 19096 1842 77 3 0x100092 kqread dhcpleased 1842 262904 1 0 3 0x80 kqread dhcpleased 71319 115171 0 0 3 0x14200 bored smr 40737 348367 0 0 2 0x14200 zerothread 93613 359834 0 0 3 0x14200 aiodoned aiodoned 92437 212376 0 0 3 0x14200 syncer update 2183 258013 0 0 3 0x14200 cleaner cleaner 16911 116220 0 0 3 0x14200 reaper reaper 32164 378293 0 0 3 0x14200 pgdaemon pagedaemon 69909 484864 0 0 3 0x14200 bored viomb 76443 192471 0 0 3 0x40014200 acpi0 acpi0 33353 310076 0 0 3 0x40014200 idle1 24592 358906 0 0 3 0x14200 bored softnet3 68320 3773 0 0 3 0x14200 bored softnet2 89723 254486 0 0 3 0x14200 bored softnet1 9253 92516 0 0 2 0x14200 softnet0 32456 27759 0 0 3 0x14200 bored systqmp 76282 402280 0 0 3 0x14200 bored systq 6888 304511 0 0 3 0x14200 tmoslp softclockmp 50558 219285 0 0 3 0x40014200 tmoslp softclock 89631 364425 0 0 3 0x40014200 idle0 1 275439 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 55228 (syz-executor) thread 0xffff8000ffff4f88 (93202) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839fc958) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 sleep_finish+0x24f sys/kern/kern_synch.c:412 #4 getblk+0x197 sys/kern/vfs_bio.c:1017 #5 bread+0x47 bio_doread sys/kern/vfs_bio.c:422 [inline] #5 bread+0x47 sys/kern/vfs_bio.c:467 #6 ffs_update+0x198 sys/ufs/ffs/ffs_inode.c:91 #7 ufs_inactive+0x2e5 sys/ufs/ufs/ufs_inode.c:95 #8 VOP_INACTIVE+0x107 sys/kern/vfs_vops.c:495 #9 vrele+0x129 sys/kern/vfs_subr.c:845 #10 ktrsettrace+0xe7 sys/kern/kern_ktrace.c:122 #11 ktrops+0x271 sys/kern/kern_ktrace.c:573 #12 doktrace+0x6dd ktrsetchildren sys/kern/kern_ktrace.c:595 [inline] #12 doktrace+0x6dd sys/kern/kern_ktrace.c:517 #13 sys_ktrace+0x11c sys/kern/kern_ktrace.c:558 #14 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #14 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #15 Xsyscall+0x128 Process 51487 (syz-executor) thread 0xffff80002a2f91f8 (325924) exclusive rrwlock inode r = 0 (0xfffffd806bd58ca8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #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:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3117 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c08fce0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3102 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 69400 (syz-executor) thread 0xffff80002a390f78 (349352) exclusive rrwlock inode r = 0 (0xfffffd806bd58ed8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c08fdf8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10197 11153K 11154K 166960K 11286 0 pcb 17 12K 12K 166960K 17 0 rtable 219 6K 6K 166960K 333 0 pf 37 18K 18K 166960K 48 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 60 2K 2K 166960K 60 0 sysctl 1 1K 1K 166960K 1 0 counters 66 36K 36K 166960K 66 0 ioctlops 0 0K 4K 166960K 1482 0 iov 0 0K 2K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1340 84K 84K 166960K 1371 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 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 93K 166960K 148 0 sigio 0 0K 0K 166960K 1 0 proc 72 91K 127K 166960K 524 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 1 0 in_multi 89 6K 6K 166960K 89 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 37 175K 175K 166960K 37 0 exec 0 0K 1K 166960K 372 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 224 153K 163K 166960K 3123 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 42 84K 106K 166960K 1247 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 3 0 NDP 27 1K 1K 166960K 27 0 temp 35 8682K 8746K 166960K 4004 0 kqueue 13 20K 22K 166960K 24 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 35 0 31 1 0 1 1 0 8 0 rtentry 168 103 0 1 5 0 5 5 0 8 0 unpcb 144 40 0 21 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 808 16 0 10 1 0 1 1 0 8 0 arp 120 17 0 0 1 0 1 1 0 8 0 inpcb 376 78 0 69 2 0 2 2 0 8 1 nd6 136 21 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 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 pfstitem 24 17 0 0 1 0 1 1 0 8 0 pfstkey 128 17 0 0 1 0 1 1 0 8 0 pfstate 376 17 0 0 2 0 2 2 0 8 0 pfrule 1344 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 256 411 0 0 26 0 26 26 0 8 0 art_table 32 412 0 0 4 0 4 4 0 8 0 art_node 16 102 0 9 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1591 0 79 95 0 95 95 0 8 0 ffsino 280 1591 0 79 109 0 109 109 0 8 0 nchpl 144 1797 0 105 63 0 63 63 0 8 0 uvmvnodes 80 1683 0 0 35 0 35 35 0 8 0 vnodes 216 1683 0 0 94 0 94 94 0 8 0 namei 1024 5515 0 5514 2 0 2 2 0 8 1 percpumem 16 47 0 0 1 0 1 1 0 8 0 kstatmem 264 26 0 0 2 0 2 2 0 8 0 scxspl 216 5817 0 5817 3 1 2 2 1 8 2 plimitpl 152 30 0 13 1 0 1 1 0 8 0 sigapl 424 455 0 407 7 0 7 7 0 8 0 futexpl 64 343 0 339 1 0 1 1 0 8 0 knotepl 120 55 0 0 2 0 2 2 0 8 0 kqueuepl 216 20 0 11 1 0 1 1 0 8 0 pipepl 328 108 0 81 3 0 3 3 0 8 0 fdescpl 504 437 0 407 5 0 5 5 0 8 0 filepl 152 1526 0 1310 9 0 9 9 0 8 0 lockfpl 104 12 0 10 1 0 1 1 0 8 0 lockfspl 48 7 0 5 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 88 0 75 1 0 1 1 0 8 0 zombiepl 144 408 0 407 1 0 1 1 0 8 0 processpl 1176 455 0 407 5 0 5 5 0 8 0 procpl 656 492 0 438 6 0 6 6 0 8 0 sockpl 688 153 0 121 4 0 4 4 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 26 0 0 4 0 4 4 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 192 0 0 12 0 12 12 0 8 0 bufpl 280 2307 0 123 156 0 156 156 0 8 0 anonpl 24 109041 0 105830 60 0 60 60 0 184 33 amapchunkpl 152 8921 0 8495 28 0 28 28 0 158 6 amappl16 200 2252 0 2237 11 0 11 11 0 8 9 amappl15 192 5 0 5 1 0 1 1 0 8 1 amappl14 184 154 0 141 1 0 1 1 0 8 0 amappl13 176 2 0 2 1 0 1 1 0 8 1 amappl12 168 1082 0 1051 4 1 3 3 0 8 1 amappl11 160 48 0 34 1 0 1 1 0 8 0 amappl10 152 28 0 28 1 0 1 1 0 8 1 amappl9 144 253 0 253 1 0 1 1 0 8 1 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 108 0 95 1 0 1 1 0 8 0 amappl6 120 173 0 169 1 0 1 1 0 8 0 amappl5 112 136 0 127 1 0 1 1 0 8 0 amappl4 104 323 0 302 1 0 1 1 0 8 0 amappl3 96 1375 0 1278 4 1 3 3 0 8 0 amappl2 88 633 0 568 2 0 2 2 0 8 0 amappl1 80 8375 0 7763 15 0 15 15 0 8 0 amappl 88 2434 0 2287 4 0 4 4 0 92 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 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 72 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 437 0 407 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 437 0 407 1 0 1 1 0 8 0 vmmpekpl 168 5376 0 5339 2 0 2 2 0 8 0 vmmpepl 168 35092 0 33229 98 0 98 98 0 357 4 vmsppl 456 436 0 407 5 0 5 5 0 8 0 rwobjpl 64 14697 0 12081 47 0 47 47 0 8 1 pdppl 4096 882 0 814 102 16 86 86 0 8 18 pvpl 32 16797 0 0 136 0 136 136 0 265 0 pmappl 248 436 0 407 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 271 0 18 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ktrops(ffff8000ffff4f88,ffffffffffffffff,0,80000b1c,fffffd806b3c37a0,fffffd807f7d2548) at ktrops+0x58 ktrcanset sys/kern/kern_ktrace.c:727 [inline] ktrops(ffff8000ffff4f88,ffffffffffffffff,0,80000b1c,fffffd806b3c37a0,fffffd807f7d2548) at ktrops+0x58 sys/kern/kern_ktrace.c:570 doktrace(fffffd806b3c37a0,4,b1c,0,ffff8000ffff4f88) at doktrace+0x6dd ktrsetchildren sys/kern/kern_ktrace.c:595 [inline] doktrace(fffffd806b3c37a0,4,b1c,0,ffff8000ffff4f88) at doktrace+0x6dd sys/kern/kern_ktrace.c:517 sys_ktrace(ffff8000ffff4f88,ffff800035cacd10,ffff800035cacc60) at sys_ktrace+0x11c sys/kern/kern_ktrace.c:558 syscall(ffff800035cacd10) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800035cacd10) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1bb06454b80, count: -5 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029a9bff0) 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(ffffffff839fc750) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839fc750) at __mp_lock+0x192 sys/kern/kern_lock.c:144 ktrsysret(ffff80002a2f9c38,4,0,ffff80002a494b80) at ktrsysret+0xe1 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a2f9c38,4,0,ffff80002a494b80) at ktrsysret+0xe1 sys/kern/kern_ktrace.c:209 syscall(ffff80002a494c30) at syscall+0xa43 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a494c30) at syscall+0xa43 sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x730c20a76a60, count: 8 ddb{1}> trace x86_ipi_db(ffff800029a9bff0) 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(ffffffff839fc750) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839fc750) at __mp_lock+0x192 sys/kern/kern_lock.c:144 ktrsysret(ffff80002a2f9c38,4,0,ffff80002a494b80) at ktrsysret+0xe1 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a2f9c38,4,0,ffff80002a494b80) at ktrsysret+0xe1 sys/kern/kern_ktrace.c:209 syscall(ffff80002a494c30) at syscall+0xa43 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a494c30) at syscall+0xa43 sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x730c20a76a60, count: -7