uvm_fault(0xfffffd806b4bbcd0, 0x7, 0, 1) -> e kernel: page fault trap, code=0 Stopped at ktrops+0x4e: movq 0x8(%rbx),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 14955 45869 0 0 0x4000000 1K syz-executor.1 517102 37715 0 0x2000002 0x4000001 0 syz-fuzzer ktrops(ffff8000212add48,ffffffffffffffff,0,c0000218,fffffd807ddc6c10,fffffd807f7d78f0) at ktrops+0x4e ktrcanset sys/kern/kern_ktrace.c:700 [inline] ktrops(ffff8000212add48,ffffffffffffffff,0,c0000218,fffffd807ddc6c10,fffffd807f7d78f0) at ktrops+0x4e sys/kern/kern_ktrace.c:543 doktrace(fffffd807ddc6c10,4,40000218,0,ffff8000212add48) at doktrace+0x524 ktrsetchildren sys/kern/kern_ktrace.c:568 [inline] doktrace(fffffd807ddc6c10,4,40000218,0,ffff8000212add48) at doktrace+0x524 sys/kern/kern_ktrace.c:490 sys_ktrace(ffff8000212add48,ffff800022b25510,ffff800022b25560) at sys_ktrace+0xd6 sys/kern/kern_ktrace.c:531 syscall(ffff800022b255e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022b255e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8c3f17b87c0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd806b4bbcd0, 0x7, 0, 1) -> e ddb{1}> trace ktrops(ffff8000212add48,ffffffffffffffff,0,c0000218,fffffd807ddc6c10,fffffd807f7d78f0) at ktrops+0x4e ktrcanset sys/kern/kern_ktrace.c:700 [inline] ktrops(ffff8000212add48,ffffffffffffffff,0,c0000218,fffffd807ddc6c10,fffffd807f7d78f0) at ktrops+0x4e sys/kern/kern_ktrace.c:543 doktrace(fffffd807ddc6c10,4,40000218,0,ffff8000212add48) at doktrace+0x524 ktrsetchildren sys/kern/kern_ktrace.c:568 [inline] doktrace(fffffd807ddc6c10,4,40000218,0,ffff8000212add48) at doktrace+0x524 sys/kern/kern_ktrace.c:490 sys_ktrace(ffff8000212add48,ffff800022b25510,ffff800022b25560) at sys_ktrace+0xd6 sys/kern/kern_ktrace.c:531 syscall(ffff800022b255e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022b255e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8c3f17b87c0, count: -5 ddb{1}> show registers rdi 0xffff800022ce6000 rsi 0x203c __ALIGN_SIZE+0x103c rbp 0xffff800022b25300 rbx 0xffffffffffffffff rdx 0xffff800022ce6000 rcx 0x203b __ALIGN_SIZE+0x103b rax 0xffffffff82668953 ktrops+0x43 r8 0xfffffd807ddc6c10 r9 0xfffffd807f7d78f0 r10 0x3833c3cc32f13bf7 r11 0x96b1e51ffdb36ba5 r12 0xffffffffffffffff r13 0xfffffd807f7d78f0 r14 0xffff8000212add48 r15 0xc0000218 rip 0xffffffff8266895e ktrops+0x4e cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800022b25280 ss 0x10 ktrops+0x4e: movq 0x8(%rbx),%r14 ddb{1}> show proc PROC (syz-executor.1) tid=14955 pid=45869 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=81, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff8000212ac808,0xffff8000211ff2c8 process=0xffff8000ffff4cb0 user=0xffff800022b20000, vmspace=0xfffffd806b4bbcd0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 45869 187244 66728 0 2 0 syz-executor.1 *45869 14955 66728 0 7 0x4000000 syz-executor.1 21975 125405 54381 0 2 0 syz-executor.5 21975 365960 54381 0 3 0x4000080 fsleep syz-executor.5 50218 331785 78546 0 2 0 syz-executor.3 50444 141527 84705 0 2 0 syz-executor.2 50444 186038 84705 0 3 0x4000080 fsleep syz-executor.2 84705 379864 37715 0 3 0x82 nanoslp syz-executor.2 93608 18290 37715 0 3 0x82 nanoslp syz-executor.0 30146 233254 0 0 3 0x14280 nfsidl nfsio 62330 297078 0 0 3 0x14280 nfsidl nfsio 45043 188272 0 0 3 0x14280 nfsidl nfsio 93003 372195 0 0 3 0x14280 nfsidl nfsio 51173 367261 0 0 3 0x14280 nfsidl nfsio 82155 514495 0 0 3 0x14280 nfsidl nfsio 27565 129272 0 0 3 0x14280 nfsidl nfsio 52898 336681 0 0 3 0x14280 nfsidl nfsio 78688 374950 0 0 3 0x14280 nfsidl nfsio 10233 275595 0 0 3 0x14280 nfsidl nfsio 47755 88171 0 0 3 0x14280 nfsidl nfsio 68347 519219 0 0 3 0x14280 nfsidl nfsio 59638 148643 0 0 3 0x14280 nfsidl nfsio 85240 500211 0 0 3 0x14280 nfsidl nfsio 4492 241692 0 0 3 0x14280 nfsidl nfsio 95345 279712 0 0 3 0x14280 nfsidl nfsio 16645 179574 0 0 3 0x14280 nfsidl nfsio 89549 248956 0 0 3 0x14280 nfsidl nfsio 32334 179925 0 0 3 0x14280 nfsidl nfsio 14883 110787 0 0 3 0x14280 nfsidl nfsio 59981 472443 37715 0 3 0x82 nanoslp syz-executor.7 9926 508780 37715 0 2 0x2 syz-executor.6 54381 518261 37715 0 3 0x82 nanoslp syz-executor.5 58406 454305 37715 0 2 0x2 syz-executor.4 78546 466430 37715 0 3 0x82 nanoslp syz-executor.3 66728 139947 37715 0 3 0x82 nanoslp syz-executor.1 37715 373694 77102 0 3 0x2000082 thrsleep syz-fuzzer 37715 85180 77102 0 2 0x6000082 syz-fuzzer 37715 460767 77102 0 3 0x6000082 wait syz-fuzzer 37715 126320 77102 0 3 0x6000082 wait syz-fuzzer 37715 89962 77102 0 3 0x6000082 thrsleep syz-fuzzer 37715 213068 77102 0 3 0x6000082 wait syz-fuzzer 37715 27807 77102 0 3 0x6000082 wait syz-fuzzer 37715 121161 77102 0 3 0x6000082 wait syz-fuzzer 37715 517102 77102 0 7 0x6000003 syz-fuzzer 37715 469813 77102 0 3 0x6000082 thrsleep syz-fuzzer 37715 12052 77102 0 3 0x6000082 thrsleep syz-fuzzer 37715 468499 77102 0 3 0x6000082 wait syz-fuzzer 37715 492503 77102 0 3 0x6000082 wait syz-fuzzer 37715 88604 77102 0 3 0x6000082 wait syz-fuzzer 37715 74417 77102 0 3 0x6000082 thrsleep syz-fuzzer 37715 219430 77102 0 3 0x6000082 thrsleep syz-fuzzer 77102 332350 80732 0 3 0x10008a sigsusp ksh 80732 305894 50516 0 3 0x9a kqread sshd 91187 131044 1 0 3 0x100083 ttyin getty 50516 316473 1 0 3 0x88 kqread sshd 65176 517504 16607 74 3 0x1100092 bpf pflogd 16607 432438 1 0 3 0x80 netio pflogd 71499 512013 69515 73 3 0x1100090 kqread syslogd 69515 367972 1 0 3 0x100082 netio syslogd 66220 520437 1 0 3 0x100080 kqread resolvd 47745 334732 51244 77 3 0x100092 kqread dhcpleased 27944 284965 51244 77 3 0x100092 kqread dhcpleased 51244 97733 1 0 3 0x80 kqread dhcpleased 22750 3791 0 0 3 0x14200 bored smr 72372 523841 0 0 2 0x14200 zerothread 58189 448423 0 0 3 0x14200 aiodoned aiodoned 2642 284398 0 0 3 0x14200 syncer update 42371 503388 0 0 3 0x14200 cleaner cleaner 24619 438784 0 0 3 0x14200 reaper reaper 33209 193716 0 0 3 0x14200 pgdaemon pagedaemon 6115 28055 0 0 3 0x14200 bored viomb 37102 285976 0 0 3 0x40014200 acpi0 acpi0 18892 386093 0 0 3 0x40014200 idle1 12665 397093 0 0 3 0x14200 bored softnet3 63723 491705 0 0 3 0x14200 bored softnet2 17870 311760 0 0 3 0x14200 bored softnet1 20560 403214 0 0 3 0x14200 bored softnet0 95242 518311 0 0 3 0x14200 bored systqmp 56318 517443 0 0 3 0x14200 bored systq 82864 456258 0 0 3 0x40014200 bored softclock 50881 110921 0 0 3 0x40014200 idle0 1 374244 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 45869 (syz-executor.1) thread 0xffff8000212add48 (14955) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82c64aa8) #0 witness_lock+0x447 #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x46b sys/kern/sched_bsd.c:470 #3 sleep_finish+0x19b sys/kern/kern_synch.c:414 #4 biowait+0x91 sys/kern/vfs_bio.c:1278 #5 bwrite+0x21c sys/kern/vfs_bio.c:769 #6 ffs_update+0x281 sys/ufs/ffs/ffs_inode.c:113 #7 ffs_truncate+0xce7 #8 ufs_inactive+0x152 sys/ufs/ufs/ufs_inode.c:84 #9 VOP_INACTIVE+0xc5 sys/kern/vfs_vops.c:489 #10 vrele+0xd3 sys/kern/vfs_subr.c:827 #11 ktrsettrace+0xb7 sys/kern/kern_ktrace.c:122 #12 ktrops+0x1a8 sys/kern/kern_ktrace.c:546 #13 doktrace+0x524 ktrsetchildren sys/kern/kern_ktrace.c:568 [inline] #13 doktrace+0x524 sys/kern/kern_ktrace.c:490 #14 sys_ktrace+0xd6 sys/kern/kern_ktrace.c:531 #15 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #15 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #16 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10220 6491K 6566K 78643K 29819 0 pcb 13 14K 16K 78643K 805 0 rtable 234 6K 6K 78643K 438 0 pf 32 9K 10K 78643K 49 0 ifaddr 45 15K 15K 78643K 59 0 ifgroup 55 2K 2K 78643K 67 0 counters 60 35K 35K 78643K 66 0 ioctlops 0 0K 4K 78643K 2360 0 iov 0 0K 12K 78643K 13032 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1467 92K 93K 78643K 33976 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 17K 78643K 2685 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 2830 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 77K 78643K 80686 0 proc 67 91K 115K 78643K 610 0 subproc 104 6K 6K 78643K 143 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 99 7K 7K 78643K 132 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 217 970K 970K 78643K 217 0 exec 0 0K 1K 78643K 417 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 362 87K 111K 78643K 728285 0 UVM aobj 24 2K 2K 78643K 847 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 12 0K 2K 78643K 37 0 temp 75 5916K 6044K 78643K 238761 0 kqueue 12 18K 36K 78643K 9124 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 75 0 72 1 0 1 1 0 8 0 rtentry 112 144 0 34 4 0 4 4 0 8 0 unpcb 144 37917 0 37901 213 210 3 11 0 8 2 syncache 304 4 0 4 1 1 0 1 0 8 0 tcpqe 32 261 0 261 1 1 0 1 0 8 0 tcpcb 808 5805 0 5801 111 110 1 14 0 8 0 arp 120 24 0 6 1 0 1 1 0 8 0 inpcb 368 10133 0 10126 146 145 1 13 0 8 0 nd6 136 33 0 9 1 0 1 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 pffrag 232 15 0 15 1 1 0 1 0 482 0 pffrnode 88 12 0 12 1 1 0 1 0 8 0 pffrent 40 506 0 506 1 1 0 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 43 0 41 1 0 1 1 0 8 0 pfstkey 128 43 0 41 1 0 1 1 0 8 0 pfstate 376 43 0 41 3 2 1 3 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 256 585 0 132 29 0 29 29 0 8 0 art_table 32 586 0 132 4 0 4 4 0 8 0 art_node 16 143 0 43 1 0 1 1 0 8 0 semupl 112 83 0 83 1 1 0 1 0 8 0 semapl 112 2828 0 2818 1 0 1 1 0 8 0 shmpl 112 844 0 823 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 99135 0 97508 102 0 102 102 0 8 0 ffsino 272 99135 0 97508 109 0 109 109 0 8 0 nchpl 144 199577 0 197920 64 0 64 64 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 584270 0 584270 4 3 1 2 0 8 1 percpumem 16 46 0 3 1 0 1 1 0 8 0 kstatmem 264 30 0 6 2 0 2 2 0 8 0 scxspl 216 514244 0 514244 10 9 1 8 1 8 1 plimitpl 152 2164 0 2148 1 0 1 1 0 8 0 sigapl 424 81010 0 80944 9 1 8 8 0 8 0 futexpl 64 509505 0 509503 1 0 1 1 0 8 0 knotepl 120 410 0 0 5 0 5 5 0 8 0 kqueuepl 216 22605 0 22597 126 125 1 9 0 8 0 pipepl 320 81063 0 81034 612 601 11 19 0 8 8 fdescpl 496 80973 0 80945 5 0 5 5 0 8 0 filepl 152 492958 0 492714 675 657 18 28 0 8 8 lockfpl 104 4657 0 4655 8 7 1 2 0 8 0 lockfspl 48 2315 0 2313 1 0 1 1 0 8 0 sessionpl 144 27 0 10 1 0 1 1 0 8 0 pgrppl 48 16429 0 16412 1 0 1 1 0 8 0 ucredpl 104 29422 0 29410 1 0 1 1 0 8 0 zombiepl 144 80946 0 80944 1 0 1 1 0 8 0 processpl 1072 81010 0 80944 5 0 5 5 0 8 0 procpl 680 192866 0 192782 74 65 9 10 0 8 1 sockpl 488 48125 0 48099 795 783 12 37 0 8 8 mcl64k 65536 66 0 0 5 2 3 3 0 8 0 mcl16k 16384 130 0 0 11 8 3 3 0 8 0 mcl12k 12288 89 0 0 2 0 2 2 0 8 0 mcl9k 9216 74 0 0 3 1 2 2 0 8 0 mcl8k 8192 89 0 0 5 2 3 3 0 8 0 mcl4k 4096 74 0 0 5 3 2 3 0 8 0 mcl2k2 2112 20 0 0 2 0 2 2 0 8 0 mcl2k 2048 703 0 0 36 24 12 34 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 2012 0 0 24 14 10 18 0 8 0 bufpl 288 87346 0 81020 452 0 452 452 0 8 0 anonpl 24 5748905 0 5740624 111 50 61 88 0 186 0 amapchunkpl 152 2283734 0 2282985 279 244 35 48 0 158 2 amappl16 200 77917 0 77732 14 3 11 11 0 8 1 amappl15 192 20 0 19 1 0 1 1 0 8 0 amappl14 184 197 0 180 2 1 1 2 0 8 0 amappl13 176 13 0 13 1 1 0 1 0 8 0 amappl12 168 81677 0 81647 3 1 2 2 0 8 0 amappl11 160 65 0 51 1 0 1 1 0 8 0 amappl10 152 39 0 29 2 1 1 1 0 8 0 amappl9 144 1768 0 1766 1 0 1 1 0 8 0 amappl8 136 3971 0 3869 4 0 4 4 0 8 0 amappl7 128 753 0 738 2 0 2 2 0 8 0 amappl6 120 690 0 667 3 2 1 3 0 8 0 amappl5 112 606 0 595 1 0 1 1 0 8 0 amappl4 104 1685 0 1637 3 0 3 3 0 8 0 amappl3 96 459208 0 459124 4 1 3 3 0 8 0 amappl2 88 84810 0 84738 3 1 2 3 0 8 0 amappl1 80 275401 0 274847 23 10 13 23 0 8 0 amappl 88 725326 0 725112 9 3 6 6 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 72 846 0 823 1 0 1 1 0 8 0 uaddrrnd 24 80973 0 80945 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 80973 0 80945 1 0 1 1 0 8 0 vmmpekpl 168 744427 0 744372 4 0 4 4 0 8 0 vmmpepl 168 4293039 0 4290938 320 220 100 117 0 357 1 vmsppl 464 80972 0 80945 5 1 4 5 0 8 0 rwobjpl 56 910426 0 903166 106 2 104 104 0 8 0 pdppl 4096 161954 0 161890 2394 2324 70 76 0 8 6 pvpl 32 19158135 0 19143905 453 328 125 339 0 265 0 pmappl 248 80972 0 80945 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3514 0 2702 24 0 24 24 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82c3aff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82c648a0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c648a0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff82c648a0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c648a0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 ktrgenio(ffff8000211dc2c8,2a,0,ffff8000006c9490,c) at ktrgenio+0x1f8 sys/kern/kern_ktrace.c:257 dofilereadv(ffff8000211dc2c8,2a,ffff8000212e5c68,0,ffff8000212e5d50) at dofilereadv+0x2e7 sys/kern/sys_generic.c:263 sys_read(ffff8000211dc2c8,ffff8000212e5d00,ffff8000212e5d50) at sys_read+0x87 sys/kern/sys_generic.c:167 syscall(ffff8000212e5dd0) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212e5dd0) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x253a4e880, count: 3 ddb{0}> trace x86_ipi_db(ffffffff82c3aff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82c648a0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c648a0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff82c648a0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c648a0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 ktrgenio(ffff8000211dc2c8,2a,0,ffff8000006c9490,c) at ktrgenio+0x1f8 sys/kern/kern_ktrace.c:257 dofilereadv(ffff8000211dc2c8,2a,ffff8000212e5c68,0,ffff8000212e5d50) at dofilereadv+0x2e7 sys/kern/sys_generic.c:263 sys_read(ffff8000211dc2c8,ffff8000212e5d00,ffff8000212e5d50) at sys_read+0x87 sys/kern/sys_generic.c:167 syscall(ffff8000212e5dd0) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212e5dd0) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x253a4e880, count: -12 ddb{0}> machine ddbcpu 1 Stopped at ktrops+0x4e: movq 0x8(%rbx),%r14 ktrops(ffff8000212add48,ffffffffffffffff,0,c0000218,fffffd807ddc6c10,fffffd807f7d78f0) at ktrops+0x4e ktrcanset sys/kern/kern_ktrace.c:700 [inline] ktrops(ffff8000212add48,ffffffffffffffff,0,c0000218,fffffd807ddc6c10,fffffd807f7d78f0) at ktrops+0x4e sys/kern/kern_ktrace.c:543 doktrace(fffffd807ddc6c10,4,40000218,0,ffff8000212add48) at doktrace+0x524 ktrsetchildren sys/kern/kern_ktrace.c:568 [inline] doktrace(fffffd807ddc6c10,4,40000218,0,ffff8000212add48) at doktrace+0x524 sys/kern/kern_ktrace.c:490 sys_ktrace(ffff8000212add48,ffff800022b25510,ffff800022b25560) at sys_ktrace+0xd6 sys/kern/kern_ktrace.c:531 syscall(ffff800022b255e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022b255e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8c3f17b87c0, count: 10 ddb{1}> trace ktrops(ffff8000212add48,ffffffffffffffff,0,c0000218,fffffd807ddc6c10,fffffd807f7d78f0) at ktrops+0x4e ktrcanset sys/kern/kern_ktrace.c:700 [inline] ktrops(ffff8000212add48,ffffffffffffffff,0,c0000218,fffffd807ddc6c10,fffffd807f7d78f0) at ktrops+0x4e sys/kern/kern_ktrace.c:543 doktrace(fffffd807ddc6c10,4,40000218,0,ffff8000212add48) at doktrace+0x524 ktrsetchildren sys/kern/kern_ktrace.c:568 [inline] doktrace(fffffd807ddc6c10,4,40000218,0,ffff8000212add48) at doktrace+0x524 sys/kern/kern_ktrace.c:490 sys_ktrace(ffff8000212add48,ffff800022b25510,ffff800022b25560) at sys_ktrace+0xd6 sys/kern/kern_ktrace.c:531 syscall(ffff800022b255e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022b255e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8c3f17b87c0, count: -5