uvm_fault(0xfffffd806c4e4748, 0x18, 0, 1) -> e kernel: page fault trap, code=0 Stopped at mtx_enter+0x6e: movq 0(%r14),%rax TID PID UID PRFLAGS PFLAGS CPU COMMAND mtx_enter(18) at mtx_enter+0x6e sys/kern/kern_lock.c:335 clockintr_unbind(ffff8000014a7430,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148a380) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:582 dtclose(11e5f,1,2000,ffff8000381522c0) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000381522c0) at dtclose+0xd9 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c9b53d0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806bca5708,1,fffffd8007bfb6e8,ffff8000381522c0) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b616cc0,ffff8000381522c0) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b616cc0,ffff8000381522c0) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806b616cc0,ffff8000381522c0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b616cc0,ffff8000381522c0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff8000381522c0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff8000381522c0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000381522c0,ffff80003c9b5730,ffff80003c9b5680) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c9b5730) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9b5730) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70a482febff0, count: 1 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xfffffd806c4e4748, 0x18, 0, 1) -> e ddb> trace mtx_enter(18) at mtx_enter+0x6e sys/kern/kern_lock.c:335 clockintr_unbind(ffff8000014a7430,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148a380) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:582 dtclose(11e5f,1,2000,ffff8000381522c0) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000381522c0) at dtclose+0xd9 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c9b53d0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806bca5708,1,fffffd8007bfb6e8,ffff8000381522c0) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b616cc0,ffff8000381522c0) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b616cc0,ffff8000381522c0) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806b616cc0,ffff8000381522c0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b616cc0,ffff8000381522c0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff8000381522c0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff8000381522c0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000381522c0,ffff80003c9b5730,ffff80003c9b5680) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c9b5730) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9b5730) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70a482febff0, count: -14 ddb> show registers rdi 0 rsi 0 rbp 0xffff80003c9b5280 rbx 0 rdx 0 rcx 0xffff8000381522c0 rax 0xffff800038152200 r8 0x1 r9 0 r10 0xad63840c0eb2ed24 r11 0xce2f67bd51196df r12 0x1 r13 0 r14 0x18 r15 0 rip 0xffffffff815d4e0e mtx_enter+0x6e cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80003c9b5250 ss 0x10 mtx_enter+0x6e: movq 0(%r14),%rax ddb> show proc PROC (syz-executor) tid=382673 pid=8766 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000381522c0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a7f4d18,0xffff800038152a98 process=0xffff80003814b620 user=0xffff80003c9b0000, vmspace=0xfffffd806c4e4748 estcpu=0, cpticks=5, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 6600 389066 16190 0 2 0 syz-executor 6600 20865 16190 0 2 0x4000000 syz-executor 36575 439771 31696 0 2 0 syz-executor 36575 79835 31696 0 2 0x4000000 syz-executor 49248 303645 19347 0 2 0 syz-executor 49248 234263 19347 0 3 0x4000080 piperd syz-executor 49248 258258 19347 0 3 0x4000080 fsleep syz-executor 49248 520242 19347 0 3 0x4000080 fsleep syz-executor 33175 462074 29107 -1 3 0x90 nanoslp syz-executor 33175 445269 29107 -1 3 0x4000090 kqread syz-executor 33175 322668 29107 -1 3 0x4000090 fsleep syz-executor 49300 258340 59804 0 3 0x80 nanoslp syz-executor 49300 477242 59804 0 3 0x4000080 kqsel syz-executor 49300 266210 59804 0 3 0x4000080 kqread syz-executor 49300 169995 59804 0 3 0x4000080 fsleep syz-executor 88445 343264 0 0 3 0x14200 bored sosplice 19347 279458 33975 0 3 0x82 nanoslp syz-executor 31696 520266 33975 0 3 0x82 nanoslp syz-executor 59804 370686 33975 0 3 0x82 nanoslp syz-executor 85540 4451 33975 0 3 0x82 nanoslp syz-executor 16190 143982 33975 0 3 0x82 nanoslp syz-executor 29107 165169 33975 0 3 0x82 nanoslp syz-executor 93073 495800 33975 0 2 0x2 syz-executor 42682 130235 33975 0 3 0x82 nanoslp syz-executor 33975 101335 31827 0 3 0x82 kqread syz-executor 31827 471353 52024 0 3 0x10008a sigsusp ksh 52024 74424 5037 0 3 0x98 kqread sshd-session 5037 501965 37310 0 3 0x92 kqread sshd-session 27900 423553 1 0 3 0x100083 ttyin getty 37310 31555 1 0 3 0x88 kqread sshd 85494 419798 28693 73 3 0x1100090 kqread syslogd 28693 105606 1 0 3 0x100082 sbwait syslogd 70817 67312 1 0 3 0x100080 kqread resolvd 87841 87443 91802 77 3 0x100092 kqread dhcpleased 67055 293860 91802 77 3 0x100092 kqread dhcpleased 91802 200489 1 0 3 0x80 kqread dhcpleased 60512 239618 0 0 3 0x14200 bored smr 31188 128198 0 0 2 0x14200 zerothread 33992 428331 0 0 3 0x14200 aiodoned aiodoned 74281 523968 0 0 3 0x14200 syncer update 98286 3805 0 0 3 0x14200 cleaner cleaner 90526 77892 0 0 3 0x14200 reaper reaper 83540 233608 0 0 3 0x14200 pgdaemon pagedaemon 732 98528 0 0 3 0x14200 bored viomb 36255 4739 0 0 3 0x40014200 acpi0 acpi0 36254 388873 0 0 3 0x14200 bored softnet7 70620 358433 0 0 3 0x14200 bored softnet6 26839 204868 0 0 3 0x14200 bored softnet5 80095 353149 0 0 3 0x14200 bored softnet4 51797 121335 0 0 3 0x14200 bored softnet3 35389 17320 0 0 3 0x14200 bored softnet2 83900 111715 0 0 3 0x14200 bored softnet1 46399 239681 0 0 3 0x14200 bored softnet0 33051 60935 0 0 3 0x14200 bored systqmp 94755 108644 0 0 3 0x14200 bored systq 75416 110261 0 0 3 0x40014200 tmoslp softclock 69434 429215 0 0 3 0x40014200 idle0 1 454492 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10192 11077K 11202K 166960K 11337 0 pcb 17 12K 12K 166960K 42 0 rtable 186 5K 5K 166960K 265 0 pf 32 13K 13K 166960K 33 0 ifaddr 43 7K 7K 166960K 46 0 ifgroup 52 2K 2K 166960K 52 0 sysctl 2 1K 9K 166960K 6 0 counters 33 17K 17K 166960K 33 0 ioctlops 0 0K 4K 166960K 38 0 iov 0 0K 16K 166960K 7 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1340 84K 85K 166960K 1412 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 6 0K 1K 166960K 7 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 212 0 sigio 1 0K 0K 166960K 5 0 proc 60 59K 100K 166960K 487 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 6 0 in_multi 99 7K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 2K 166960K 352 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 240 163K 167K 166960K 3453 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 38 76K 96K 166960K 1234 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 12 0K 2K 166960K 28 0 temp 39 8634K 8714K 166960K 4529 0 kqueue 15 24K 26K 166960K 38 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 40 0 37 1 0 1 1 0 8 0 rtentry 136 97 0 13 4 0 4 4 0 8 0 unpcb 144 79 0 64 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 31 0 24 1 0 1 1 0 8 0 arp 88 10 0 0 1 0 1 1 0 8 0 inpcb 328 125 0 113 2 0 2 2 0 8 0 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 2 0 2 1 0 1 1 0 8 1 nd6 104 16 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 1 0 0 1 0 1 1 0 8 0 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 pftag 88 2 0 2 1 0 1 1 0 8 1 pfrule 1344 2 0 2 1 0 1 1 0 8 1 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 498 0 72 30 0 30 30 0 8 1 art_table 40 499 0 72 5 0 5 5 0 8 0 art_node 32 97 0 23 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 4 0 0 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1702 0 200 95 0 95 95 0 8 0 ffsino 256 1703 0 200 95 0 95 95 0 8 0 nchpl 144 2002 0 320 63 0 63 63 0 8 0 uvmvnodes 80 1812 0 0 37 0 37 37 0 8 0 vnodes 216 1812 0 0 101 0 101 101 0 8 0 namei 1024 5861 0 5858 2 0 2 2 0 8 1 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 6910 0 6910 8 0 8 8 1 8 8 plimitpl 152 43 0 27 1 0 1 1 0 8 0 sigapl 424 494 0 444 7 0 7 7 0 8 1 knotepl 120 12135 0 12087 8 0 8 8 0 8 6 kqueuepl 184 45 0 32 1 0 1 1 0 8 0 pipepl 304 109 0 81 3 0 3 3 0 8 0 fdescpl 448 473 0 444 5 0 5 5 0 8 1 filepl 120 1753 0 1530 8 0 8 8 0 8 0 lockfpl 104 43 0 40 1 0 1 1 0 8 0 lockfspl 48 23 0 20 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 31 0 15 1 0 1 1 0 8 0 ucredpl 104 168 0 156 1 0 1 1 0 8 0 zombiepl 144 446 0 444 1 0 1 1 0 8 0 processpl 1152 494 0 444 5 0 5 5 0 8 1 procpl 664 629 0 569 6 0 6 6 0 8 0 sockpl 552 252 0 222 3 0 3 3 0 8 0 mcl64k 65536 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 4 0 4 1 0 1 1 0 8 1 mcl4k 4096 2546 0 2490 14 0 14 14 0 8 5 mcl2k 2048 305 0 305 1 0 1 1 0 8 1 mtagpl 96 4 0 4 1 0 1 1 0 8 1 mbufpl 256 4797 0 4653 29 11 18 29 0 8 7 bufpl 280 3006 0 117 207 0 207 207 0 8 0 anonpl 24 104983 0 101632 51 0 51 51 0 187 29 amapchunkpl 152 10336 0 9803 27 0 27 27 0 158 5 amappl16 200 2020 0 1997 14 4 10 14 0 8 8 amappl15 192 5 0 5 1 0 1 1 0 8 1 amappl14 184 105 0 95 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 0 1 1 0 8 1 amappl12 168 1117 0 1088 3 0 3 3 0 8 1 amappl11 160 47 0 37 1 0 1 1 0 8 0 amappl10 152 22 0 22 1 0 1 1 0 8 1 amappl9 144 268 0 267 1 0 1 1 0 8 0 amappl8 136 20 0 18 1 0 1 1 0 8 0 amappl7 128 113 0 103 1 0 1 1 0 8 0 amappl6 120 171 0 168 1 0 1 1 0 8 0 amappl5 112 123 0 117 1 0 1 1 0 8 0 amappl4 104 265 0 248 1 0 1 1 0 8 0 amappl3 96 1702 0 1586 3 0 3 3 0 8 0 amappl2 88 619 0 565 2 0 2 2 0 8 0 amappl1 80 8100 0 7549 13 0 13 13 0 8 1 amappl 88 2812 0 2637 5 0 5 5 0 92 1 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 253 0 253 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 473 0 444 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 473 0 444 1 0 1 1 0 8 0 vmmpekpl 168 5278 0 5247 2 0 2 2 0 8 0 vmmpepl 168 36645 0 34796 93 0 93 93 0 357 10 vmsppl 368 472 0 444 4 0 4 4 0 8 1 rwobjpl 40 14621 0 11940 29 0 29 29 0 8 1 pdppl 4096 952 0 888 98 32 66 82 0 8 2 pvpl 32 236399 0 227820 128 0 128 128 0 265 51 pmappl 216 472 0 444 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 384 0 43 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace mtx_enter(18) at mtx_enter+0x6e sys/kern/kern_lock.c:335 clockintr_unbind(ffff8000014a7430,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148a380) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:582 dtclose(11e5f,1,2000,ffff8000381522c0) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000381522c0) at dtclose+0xd9 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c9b53d0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806bca5708,1,fffffd8007bfb6e8,ffff8000381522c0) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b616cc0,ffff8000381522c0) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b616cc0,ffff8000381522c0) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806b616cc0,ffff8000381522c0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b616cc0,ffff8000381522c0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff8000381522c0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff8000381522c0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000381522c0,ffff80003c9b5730,ffff80003c9b5680) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c9b5730) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9b5730) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70a482febff0, count: -14 ddb> machine ddbcpu 1 No such command ddb> trace mtx_enter(18) at mtx_enter+0x6e sys/kern/kern_lock.c:335 clockintr_unbind(ffff8000014a7430,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148a380) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:582 dtclose(11e5f,1,2000,ffff8000381522c0) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000381522c0) at dtclose+0xd9 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c9b53d0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806bca5708,1,fffffd8007bfb6e8,ffff8000381522c0) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b616cc0,ffff8000381522c0) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b616cc0,ffff8000381522c0) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806b616cc0,ffff8000381522c0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b616cc0,ffff8000381522c0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff8000381522c0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff8000381522c0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000381522c0,ffff80003c9b5730,ffff80003c9b5680) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c9b5730) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9b5730) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70a482febff0, count: -14