uvm_fault(0xfffffd8009cd5190, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 TID PID UID PRFLAGS PFLAGS CPU COMMAND dt_ioctl_record_stop(ffff80000159c080) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,2,2000,ffff80002cd1d9c8) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,2,2000,ffff80002cd1d9c8) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c9d10f0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80665466e8,2,fffffd8007bfb820,ffff80002cd1d9c8) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd8065e43cc0,ffff80002cd1d9c8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8065e43cc0,ffff80002cd1d9c8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd8065e43cc0,ffff80002cd1d9c8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8065e43cc0,ffff80002cd1d9c8) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80002cd1d9c8) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80002cd1d9c8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80002cd1d9c8,ffff80003c9d1460,ffff80003c9d13b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c9d1460) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9d1460) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76a32ebdc390, count: 3 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(0xfffffd8009cd5190, 0x0, 0, 1) -> e ddb> trace dt_ioctl_record_stop(ffff80000159c080) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,2,2000,ffff80002cd1d9c8) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,2,2000,ffff80002cd1d9c8) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c9d10f0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80665466e8,2,fffffd8007bfb820,ffff80002cd1d9c8) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd8065e43cc0,ffff80002cd1d9c8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8065e43cc0,ffff80002cd1d9c8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd8065e43cc0,ffff80002cd1d9c8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8065e43cc0,ffff80002cd1d9c8) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80002cd1d9c8) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80002cd1d9c8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80002cd1d9c8,ffff80003c9d1460,ffff80003c9d13b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c9d1460) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9d1460) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76a32ebdc390, count: -12 ddb> show registers rdi 0 rsi 0 rbp 0xffff80003c9d1020 rbx 0xffffffff815c3890 dtclose rdx 0 rcx 0xffff80002cd1d9c8 rax 0xffffffff83875430 dt_prov_static r8 0xffffffffffffffff r9 0 r10 0xfa35d232937c5c2 r11 0x7106b2f125d05bb9 r12 0xffffffff83875bd0 dt_static_uvm_malloc r13 0 r14 0 r15 0xffff80000164ad00 rip 0xffffffff815c3c10 dt_ioctl_record_stop+0xf0 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80003c9d0ff0 ss 0x10 dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 ddb> show proc PROC (syz-executor) tid=237375 pid=73648 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002cd1d9c8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002cd1c028,0xffff80002a812cf8 process=0xffff80003c978930 user=0xffff80003c9cc000, vmspace=0xfffffd8009cd5190 estcpu=36, cpticks=21, pctcpu=0.1, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 63222 183815 9195 0 2 0 syz-executor 20208 475684 35069 0 2 0 syz-executor 20208 194000 35069 0 3 0x4000080 fsleep syz-executor 20208 365047 35069 0 3 0x4000080 fsleep syz-executor 41247 274711 48668 0 2 0 syz-executor 41247 329216 48668 0 3 0x4000080 fsleep syz-executor 41247 187959 48668 0 2 0x4000000 syz-executor 41247 318120 48668 0 2 0x4000000 syz-executor 75799 15935 78662 0 2 0 syz-executor 75799 492189 78662 0 3 0x4000080 sbwait syz-executor 75799 387895 78662 0 3 0x4000000 inode syz-executor 75799 224073 78662 0 3 0x4000000 inode syz-executor 55609 195818 91630 0 2 0 syz-executor 55609 79210 91630 0 2 0x4000000 syz-executor 631 410968 0 0 3 0x14200 acct acct 20547 520922 1 0 3 0x100083 ttyin getty 86549 128051 2675 0 3 0x82 nanoslp syz-executor 79483 144425 2675 0 2 0x2 syz-executor 91630 252633 2675 0 3 0x82 nanoslp syz-executor 40864 231728 34469 0 3 0x82 sbwait sshd-session 83124 364929 34469 0 3 0x82 sbwait sshd-session 87719 453360 34469 0 3 0x82 sbwait sshd-session 14010 20144 0 0 3 0x14200 bored sosplice 48668 434864 2675 0 3 0x82 nanoslp syz-executor 74048 85454 2675 0 2 0x2 syz-executor 35069 18733 2675 0 3 0x82 nanoslp syz-executor 9195 417482 2675 0 3 0x82 nanoslp syz-executor 78662 268854 2675 0 3 0x82 nanoslp syz-executor 2675 509074 68460 0 3 0x82 kqread syz-executor 68460 231000 28301 0 3 0x10008a sigsusp ksh 28301 384175 82773 0 3 0x98 kqread sshd-session 82773 30176 34469 0 3 0x92 kqread sshd-session 34469 38077 1 0 3 0x88 kqread sshd 55037 148412 41291 73 3 0x1100090 kqread syslogd 41291 289308 1 0 3 0x100082 sbwait syslogd 60912 151542 1 0 3 0x100080 kqread resolvd 19585 114956 39595 77 3 0x100092 kqread dhcpleased 86011 197583 39595 77 3 0x100092 kqread dhcpleased 39595 48465 1 0 3 0x80 kqread dhcpleased 187 346105 0 0 3 0x14200 bored smr 28936 332344 0 0 2 0x14200 zerothread 94416 86973 0 0 3 0x14200 aiodoned aiodoned 949 78361 0 0 3 0x14200 syncer update 65918 44907 0 0 3 0x14200 cleaner cleaner 43925 32305 0 0 3 0x14200 reaper reaper 50922 72555 0 0 3 0x14200 pgdaemon pagedaemon 63269 382180 0 0 3 0x14200 bored viomb 40279 404585 0 0 3 0x40014200 acpi0 acpi0 14453 389628 0 0 3 0x14200 bored softnet7 31823 505324 0 0 3 0x14200 bored softnet6 25579 495782 0 0 3 0x14200 bored softnet5 64809 246012 0 0 3 0x14200 bored softnet4 27682 38662 0 0 3 0x14200 bored softnet3 75121 82556 0 0 3 0x14200 bored softnet2 46241 80231 0 0 3 0x14200 bored softnet1 77866 272371 0 0 3 0x14200 bored softnet0 66909 365244 0 0 3 0x14200 bored systqmp 92134 221018 0 0 3 0x14200 bored systq 19031 367667 0 0 2 0x40014200 softclock 75926 134387 0 0 3 0x40014200 idle0 1 469933 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10222 11098K 11723K 166960K 13521 0 pcb 17 13K 13K 166960K 207 0 rtable 211 9K 9K 166960K 560 0 pf 33 13K 16K 166960K 126 0 ifaddr 40 7K 7K 166960K 92 0 ifgroup 50 2K 2K 166960K 135 0 sysctl 4 1K 9K 166960K 16 0 counters 32 17K 18K 166960K 77 0 ioctlops 0 0K 8K 166960K 228 0 iov 0 0K 13K 166960K 122 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1468 92K 93K 166960K 2781 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 28 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 52 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 1328 0 sigio 0 0K 0K 166960K 88 0 proc 60 59K 124K 166960K 641 0 subproc 72 4K 4K 166960K 102 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 160 0 in_multi 89 6K 7K 166960K 158 0 ether_multi 1 0K 0K 166960K 5 0 mrt 2 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 539 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 246 172K 181K 166960K 13880 0 UVM aobj 34 3K 3K 166960K 36 0 pinsyscall 45 90K 96K 166960K 2468 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 70 0 NDP 11 0K 2K 166960K 64 0 temp 79 8676K 8756K 166960K 46092 0 kqueue 14 22K 31K 166960K 272 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 120 137 0 134 1 0 1 1 0 8 0 rtentry 136 169 0 83 4 0 4 4 0 8 0 unpcb 144 995 0 967 5 1 4 4 0 8 2 syncache 336 15 0 15 2 1 1 1 0 8 1 tcpqe 32 4 0 4 1 0 1 1 0 8 1 tcpcb 736 746 0 736 11 3 8 8 0 8 6 arp 88 21 0 9 1 0 1 1 0 8 0 ipq 40 4 0 4 1 0 1 1 0 8 1 ipqe 40 5 0 5 1 0 1 1 0 8 1 inpcb 328 1551 0 1535 17 8 9 10 0 8 7 ip6q 72 6 0 6 1 0 1 1 0 8 1 ip6af 40 10 0 10 1 0 1 1 0 8 1 nd6 104 32 0 14 1 0 1 1 0 8 0 pkpcb 40 15 0 15 1 0 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 0 1 1 0 8 1 ppxss 1072 36 0 36 2 1 1 1 0 8 1 pppxif 1384 2 0 2 1 0 1 1 0 8 1 pfstscr 40 3 0 2 1 0 1 1 0 8 0 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 2 0 2 1 0 1 1 0 8 1 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 7 0 3 1 0 1 1 0 8 0 pfstate 384 4 0 2 1 0 1 1 0 8 0 pfrule 1344 17 0 16 1 0 1 1 0 8 0 rttmr 136 4 0 4 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 842 0 422 30 1 29 30 0 8 2 art_table 40 845 0 422 5 0 5 5 0 8 0 art_node 32 167 0 91 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 7 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 48 0 38 1 0 1 1 0 8 0 shmpl 112 33 0 2 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 3931 0 2431 95 0 95 95 0 8 0 ffsino 256 3931 0 2431 95 0 95 95 0 8 0 nchpl 144 5772 0 4086 63 0 63 63 0 8 0 rtmask 32 5 0 5 1 0 1 1 0 8 1 uvmvnodes 80 4805 0 0 99 0 99 99 0 8 0 vnodes 216 4806 0 0 267 0 267 267 0 8 0 namei 1024 20461 0 20458 4 2 2 2 0 8 1 kstatmem 264 82 0 60 2 0 2 2 0 8 0 scsiplug 72 9 0 9 1 0 1 1 0 8 1 scxspl 216 21688 0 21688 9 7 2 8 1 8 2 plimitpl 152 548 0 532 1 0 1 1 0 8 0 sigapl 424 1619 0 1565 10 1 9 9 0 8 2 knotepl 120 48965 0 48913 21 11 10 12 0 8 8 kqueuepl 184 486 0 475 3 0 3 3 0 8 2 pipepl 304 235 0 208 5 2 3 5 0 8 0 fdescpl 448 1576 0 1543 5 1 4 5 0 8 0 filepl 120 11352 0 11112 18 3 15 15 0 8 5 lockfpl 104 904 0 900 2 0 2 2 0 8 1 lockfspl 48 342 0 338 1 0 1 1 0 8 0 sessionpl 144 36 0 25 1 0 1 1 0 8 0 pgrppl 48 68 0 49 1 0 1 1 0 8 0 ucredpl 104 2220 0 2208 1 0 1 1 0 8 0 zombiepl 144 2380 0 2379 2 1 1 1 0 8 0 processpl 1168 1620 0 1565 7 1 6 6 0 8 1 procpl 656 3682 0 3618 8 0 8 8 0 8 1 sosppl 168 9 0 9 2 1 1 1 0 8 1 sockpl 552 2728 0 2680 18 7 11 11 0 8 7 mcl64k 65536 69 0 69 2 1 1 1 0 8 1 mcl16k 16384 5 0 5 1 0 1 1 0 8 1 mcl9k 9216 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 12 0 12 2 1 1 1 0 8 1 mcl4k 4096 4051 0 4000 14 6 8 13 0 8 1 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 2012 0 2012 5 0 5 5 0 8 5 mtagpl 96 39 0 17 1 0 1 1 0 8 0 mbufpl 256 16266 0 16085 18 0 18 18 0 8 4 bufpl 280 7275 0 1048 445 0 445 445 0 8 0 anonpl 24 227624 0 223900 59 10 49 49 0 187 9 amapchunkpl 152 52385 0 51906 38 3 35 35 0 158 14 amappl16 200 3896 0 3863 20 7 13 15 0 8 8 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 128 0 115 1 0 1 1 0 8 0 amappl13 176 8 0 8 2 1 1 1 0 8 1 amappl12 168 2247 0 2215 3 1 2 3 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 5 0 5 2 1 1 1 0 8 1 amappl9 144 241 0 241 1 1 0 1 0 8 0 amappl8 136 38 0 37 1 0 1 1 0 8 0 amappl7 128 113 0 100 1 0 1 1 0 8 0 amappl6 120 209 0 202 1 0 1 1 0 8 0 amappl5 112 131 0 124 1 0 1 1 0 8 0 amappl4 104 327 0 310 1 0 1 1 0 8 0 amappl3 96 9115 0 9007 4 0 4 4 0 8 0 amappl2 88 761 0 685 2 0 2 2 0 8 0 amappl1 80 15316 0 14525 20 1 19 19 0 8 1 amappl 88 12895 0 12730 5 0 5 5 0 92 0 dma65536 65536 2 0 2 1 0 1 1 0 8 1 dma8192 8192 1 0 1 1 0 1 1 0 8 1 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 128 256 0 256 2 1 1 1 0 8 1 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 35 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1575 0 1543 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1575 0 1543 1 0 1 1 0 8 0 vmmpekpl 168 14537 0 14495 3 0 3 3 0 8 0 vmmpepl 168 105427 0 103172 113 1 112 112 0 357 6 vmsppl 368 1574 0 1543 5 1 4 4 0 8 0 rwobjpl 40 34016 0 28038 61 0 61 61 0 8 0 pdppl 4096 3157 0 3086 126 53 73 83 0 8 2 pvpl 32 666809 0 656236 149 16 133 133 0 265 28 pmappl 216 1574 0 1543 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 434 0 73 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace dt_ioctl_record_stop(ffff80000159c080) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,2,2000,ffff80002cd1d9c8) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,2,2000,ffff80002cd1d9c8) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c9d10f0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80665466e8,2,fffffd8007bfb820,ffff80002cd1d9c8) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd8065e43cc0,ffff80002cd1d9c8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8065e43cc0,ffff80002cd1d9c8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd8065e43cc0,ffff80002cd1d9c8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8065e43cc0,ffff80002cd1d9c8) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80002cd1d9c8) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80002cd1d9c8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80002cd1d9c8,ffff80003c9d1460,ffff80003c9d13b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c9d1460) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9d1460) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76a32ebdc390, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace dt_ioctl_record_stop(ffff80000159c080) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,2,2000,ffff80002cd1d9c8) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,2,2000,ffff80002cd1d9c8) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c9d10f0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80665466e8,2,fffffd8007bfb820,ffff80002cd1d9c8) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd8065e43cc0,ffff80002cd1d9c8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8065e43cc0,ffff80002cd1d9c8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd8065e43cc0,ffff80002cd1d9c8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8065e43cc0,ffff80002cd1d9c8) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80002cd1d9c8) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80002cd1d9c8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80002cd1d9c8,ffff80003c9d1460,ffff80003c9d13b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c9d1460) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9d1460) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76a32ebdc390, count: -12