login: uvm_fault(0xfffffd807e2a7e18, 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 *250684 30061 0 0 0x4000000 0 syz-executor dt_ioctl_record_stop(ffff800001586280) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80002a776008) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a776008) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c946d10) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806b375288,81,fffffd8007bfb888,ffff80002a776008) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd806796c4b0,ffff80002a776008) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806796c4b0,ffff80002a776008) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806796c4b0,ffff80002a776008) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806796c4b0,ffff80002a776008) at closef+0x18d sys/kern/kern_descrip.c:1251 syscall(ffff80003c946f70) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c946f70) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc68c98a7710, count: 6 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(0xfffffd807e2a7e18, 0x0, 0, 1) -> e ddb> trace dt_ioctl_record_stop(ffff800001586280) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80002a776008) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a776008) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c946d10) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806b375288,81,fffffd8007bfb888,ffff80002a776008) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd806796c4b0,ffff80002a776008) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806796c4b0,ffff80002a776008) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806796c4b0,ffff80002a776008) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806796c4b0,ffff80002a776008) at closef+0x18d sys/kern/kern_descrip.c:1251 syscall(ffff80003c946f70) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c946f70) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc68c98a7710, count: -9 ddb> show registers rdi 0 rsi 0 rbp 0xffff80003c946c40 rbx 0xffffffff81e871c0 dtclose rdx 0 rcx 0xffff80002a776008 rax 0xffffffff83855670 dt_prov_syscall r8 0xffffffff81eb2510 uvm_map_inentry_sp r9 0x1 r10 0 r11 0x92611d561c411de3 r12 0xffff80000006a000 r13 0 r14 0 r15 0xffff8000015c7200 rip 0xffffffff81e87540 dt_ioctl_record_stop+0xf0 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80003c946c10 ss 0x10 dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 ddb> show proc PROC (syz-executor) tid=250684 pid=30061 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002ccfaf98,0xffffffff83996bb0 process=0xffff800036d14db0 user=0xffff80003c942000, vmspace=0xfffffd807e2a7e18 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 30061 62110 20245 0 2 0 syz-executor 30061 103087 20245 0 2 0x4000000 syz-executor *30061 250684 20245 0 7 0x4000000 syz-executor 82111 399596 36694 0 3 0x80 fsleep syz-executor 82111 121936 36694 0 3 0x4000080 nanoslp syz-executor 56888 180035 31163 0 3 0x80 fsleep syz-executor 56888 397000 31163 0 3 0x4000080 kqread syz-executor 37865 235506 10674 0 3 0x80 fsleep syz-executor 37865 3813 10674 0 2 0x4000c80 syz-executor 86973 223373 99814 0 3 0x80 fsleep syz-executor 86973 509417 99814 0 3 0x4000080 bell syz-executor 55542 239012 20201 0 3 0x80 fsleep syz-executor 55542 22601 20201 0 3 0x4000080 sbwait syz-executor 39433 82704 76889 0 3 0x80 fsleep syz-executor 39433 237 76889 0 3 0x4000080 fifor syz-executor 3350 220282 1 0 3 0x100083 ttyin getty 99814 112405 11778 0 3 0x82 nanoslp syz-executor 36694 271595 11778 0 2 0xc82 syz-executor 20245 154882 11778 0 3 0x82 nanoslp syz-executor 70396 361637 0 0 3 0x14280 nfsidl nfsio 88109 264631 0 0 3 0x14280 nfsidl nfsio 6322 308093 0 0 3 0x14280 nfsidl nfsio 9626 414182 0 0 3 0x14280 nfsidl nfsio 99645 428547 0 0 3 0x14280 nfsidl nfsio 74607 462549 0 0 3 0x14280 nfsidl nfsio 92270 458035 0 0 3 0x14280 nfsidl nfsio 61730 76197 0 0 3 0x14280 nfsidl nfsio 24697 247015 0 0 3 0x14280 nfsidl nfsio 41089 242524 0 0 3 0x14280 nfsidl nfsio 51427 46857 0 0 3 0x14280 nfsidl nfsio 51887 451171 0 0 3 0x14280 nfsidl nfsio 52037 487041 0 0 3 0x14280 nfsidl nfsio 66404 26306 0 0 3 0x14280 nfsidl nfsio 78200 479789 0 0 3 0x14280 nfsidl nfsio 89157 267661 0 0 3 0x14280 nfsidl nfsio 42842 84615 0 0 3 0x14280 nfsidl nfsio 79260 458210 0 0 3 0x14280 nfsidl nfsio 81555 107281 0 0 3 0x14280 nfsidl nfsio 11667 142357 0 0 3 0x14280 nfsidl nfsio 76889 134481 11778 0 3 0x82 nanoslp syz-executor 19678 404861 0 0 3 0x14200 bored sosplice 17869 377889 11778 0 3 0x82 wait syz-executor 20201 72991 11778 0 2 0xc82 syz-executor 10674 496113 11778 0 2 0xc82 syz-executor 31163 514663 11778 0 3 0x82 nanoslp syz-executor 11778 164985 59668 0 3 0x82 kqread syz-executor 59668 516725 81225 0 3 0x10008a sigsusp ksh 81225 232587 10124 0 3 0x98 kqread sshd-session 10124 515131 7574 0 3 0x92 kqread sshd-session 7574 162400 1 0 3 0x88 kqread sshd 40773 435968 25447 73 3 0x1100090 kqread syslogd 25447 371186 1 0 3 0x100082 sbwait syslogd 53847 86524 1 0 3 0x100080 kqread resolvd 83948 203595 34059 77 3 0x100092 kqread dhcpleased 50434 91723 34059 77 3 0x100092 kqread dhcpleased 34059 236785 1 0 3 0x80 kqread dhcpleased 11558 90548 0 0 3 0x14200 bored smr 41505 434285 0 0 3 0x14200 pgzero zerothread 33113 54354 0 0 3 0x14200 aiodoned aiodoned 35525 177692 0 0 3 0x14200 syncer update 21923 250200 0 0 3 0x14200 cleaner cleaner 40371 217689 0 0 3 0x14200 reaper reaper 46291 180209 0 0 3 0x14200 pgdaemon pagedaemon 7141 330182 0 0 3 0x14200 bored viomb 28768 229261 0 0 3 0x40014200 acpi0 acpi0 49150 363201 0 0 3 0x14200 bored softnet3 46235 2459 0 0 3 0x14200 bored softnet2 373 27365 0 0 3 0x14200 bored softnet1 71945 238636 0 0 3 0x14200 bored softnet0 12585 393031 0 0 3 0x14200 bored systqmp 3841 18828 0 0 3 0x14200 bored systq 27828 161899 0 0 2 0x40014200 softclock 56952 215864 0 0 3 0x40014200 idle0 1 368007 0 0 3 0x80082 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 10237 11219K 11692K 166960K 15171 0 pcb 17 15K 17K 166960K 518 0 rtable 250 10K 12K 166960K 868 0 pf 35 14K 18K 166960K 166 0 ifaddr 45 8K 9K 166960K 134 0 ifgroup 54 2K 2K 166960K 206 0 sysctl 4 1K 9K 166960K 24 0 counters 33 17K 18K 166960K 107 0 ioctlops 0 0K 4K 166960K 415 0 iov 0 0K 28K 166960K 102 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1454 91K 92K 166960K 3381 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 35 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 160 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 1885 0 sigio 0 0K 0K 166960K 25 0 proc 60 59K 124K 166960K 812 0 subproc 72 4K 4K 166960K 126 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 195 0 in_multi 93 6K 7K 166960K 228 0 ether_multi 1 0K 0K 166960K 22 0 mrt 2 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 723 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 71 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 225 151K 177K 166960K 17109 0 UVM aobj 55 3K 3K 166960K 63 0 pinsyscall 39 78K 96K 166960K 3071 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 92 0 NDP 12 0K 2K 166960K 87 0 temp 80 8676K 8804K 166960K 54219 0 kqueue 13 20K 31K 166960K 303 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 120 219 0 216 3 2 1 3 0 8 0 rtentry 136 235 0 139 5 0 5 5 0 8 0 unpcb 144 1654 0 1635 6 5 1 6 0 8 0 syncache 336 7 0 7 1 1 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 520 0 514 7 6 1 7 0 8 0 arp 88 36 0 20 1 0 1 1 0 8 0 ipq 40 4 0 4 1 1 0 1 0 8 0 ipqe 40 6 0 6 1 1 0 1 0 8 0 inpcb 328 1790 0 1780 7 5 2 7 0 8 0 ip6q 72 12 0 6 1 0 1 1 0 8 0 ip6af 40 18 0 13 1 0 1 1 0 8 0 nd6 104 53 0 28 1 0 1 1 0 8 0 pkpcb 40 12 0 12 1 1 0 1 0 8 0 kcovpl 48 14 0 6 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 1 0 1 0 8 0 ppxss 1072 53 0 53 2 1 1 1 0 8 1 pppxif 1384 10 0 10 1 1 0 1 0 8 0 pfstscr 40 4 0 4 1 1 0 1 0 8 0 pfosfp 40 2 0 0 1 0 1 1 0 8 0 pfosfpen 112 2 0 0 1 0 1 1 0 8 0 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 pfstitem 24 5 0 1 1 0 1 1 0 8 0 pfstkey 128 13 0 8 1 0 1 1 0 8 0 pfstate 384 7 0 5 1 0 1 1 0 8 0 pfrule 1344 41 0 41 1 1 0 1 0 8 0 rttmr 136 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1001 0 572 33 5 28 33 0 8 0 art_table 40 1005 0 572 6 0 6 6 0 8 0 art_node 32 233 0 152 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 3 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 155 0 145 1 0 1 1 0 8 0 shmpl 112 60 0 8 2 0 2 2 0 8 0 dirhash 1024 36 0 19 3 0 3 3 0 8 0 dino2pl 256 4720 0 3222 95 0 95 95 0 8 0 ffsino 248 4720 0 3222 95 0 95 95 0 8 0 nchpl 144 7293 0 5594 64 0 64 64 0 8 0 rtmask 32 12 0 12 2 1 1 1 0 8 1 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 26261 0 26261 2 1 1 2 0 8 1 kstatmem 264 118 0 94 3 1 2 3 0 8 0 scsiplug 72 4 0 4 1 1 0 1 0 8 0 scxspl 216 30809 0 30809 8 7 1 8 1 8 1 plimitpl 152 401 0 384 1 0 1 1 0 8 0 sigapl 424 2155 0 2088 8 0 8 8 0 8 0 knotepl 120 82649 0 82601 36 33 3 17 0 8 0 kqueuepl 184 756 0 744 4 3 1 4 0 8 0 pipepl 296 428 0 401 5 2 3 5 0 8 0 fdescpl 440 2116 0 2086 5 1 4 5 0 8 0 filepl 120 14685 0 14459 15 6 9 15 0 8 0 lockfpl 104 1222 0 1218 2 1 1 2 0 8 0 lockfspl 48 559 0 555 1 0 1 1 0 8 0 sessionpl 144 32 0 24 1 0 1 1 0 8 0 pgrppl 48 64 0 48 1 0 1 1 0 8 0 ucredpl 104 2289 0 2278 1 0 1 1 0 8 0 zombiepl 144 2114 0 2113 1 0 1 1 0 8 0 processpl 1160 2155 0 2088 5 0 5 5 0 8 0 procpl 656 4598 0 4523 8 0 8 8 0 8 0 sosppl 168 11 0 11 1 1 0 1 0 8 0 sockpl 528 3725 0 3693 17 14 3 14 0 8 0 mcl64k 65536 97 0 97 2 1 1 1 0 8 1 mcl16k 16384 9 0 9 2 1 1 1 0 8 1 mcl12k 12288 2 0 2 1 1 0 1 0 8 0 mcl9k 9216 3 0 3 1 1 0 1 0 8 0 mcl8k 8192 60 0 60 2 1 1 1 0 8 1 mcl4k 4096 4678 0 4627 15 7 8 14 0 8 1 mcl2k2 2112 2 0 2 1 1 0 1 0 8 0 mcl2k 2048 2969 0 2956 7 4 3 6 0 8 1 mtagpl 96 199 0 109 3 0 3 3 0 8 0 mbufpl 256 25790 0 25566 19 3 16 19 0 8 0 bufpl 280 11023 0 4796 445 0 445 445 0 8 0 anonpl 24 306892 0 303507 70 36 34 70 0 187 0 amapchunkpl 152 58938 0 58454 45 25 20 45 0 158 0 amappl16 200 6880 0 6841 40 35 5 23 0 8 0 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 128 0 118 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 2828 0 2798 3 1 2 3 0 8 0 amappl11 160 42 0 32 1 0 1 1 0 8 0 amappl10 152 17 0 16 1 0 1 1 0 8 0 amappl9 144 304 0 304 1 1 0 1 0 8 0 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 119 0 108 1 0 1 1 0 8 0 amappl6 120 237 0 234 1 0 1 1 0 8 0 amappl5 112 155 0 148 1 0 1 1 0 8 0 amappl4 104 326 0 309 1 0 1 1 0 8 0 amappl3 96 12211 0 12100 4 0 4 4 0 8 0 amappl2 88 744 0 687 2 0 2 2 0 8 0 amappl1 80 16516 0 15959 14 1 13 14 0 8 0 amappl 88 16008 0 15846 5 0 5 5 0 92 0 dma65536 65536 3 0 3 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 3 0 3 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 128 254 0 254 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 62 0 8 1 0 1 1 0 8 0 uaddrrnd 24 2116 0 2086 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2116 0 2086 1 0 1 1 0 8 0 vmmpekpl 168 16273 0 16221 3 0 3 3 0 8 0 vmmpepl 168 136272 0 134328 103 13 90 103 0 357 1 vmsppl 360 2115 0 2086 4 1 3 4 0 8 0 rwobjpl 32 41001 0 34159 58 2 56 58 0 8 0 pdppl 4096 4239 0 4172 123 56 67 83 0 8 0 pvpl 32 899279 0 890005 148 54 94 148 0 265 0 pmappl 216 2115 0 2086 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 321 0 91 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace dt_ioctl_record_stop(ffff800001586280) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80002a776008) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a776008) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c946d10) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806b375288,81,fffffd8007bfb888,ffff80002a776008) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd806796c4b0,ffff80002a776008) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806796c4b0,ffff80002a776008) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806796c4b0,ffff80002a776008) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806796c4b0,ffff80002a776008) at closef+0x18d sys/kern/kern_descrip.c:1251 syscall(ffff80003c946f70) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c946f70) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc68c98a7710, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace dt_ioctl_record_stop(ffff800001586280) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80002a776008) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a776008) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c946d10) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806b375288,81,fffffd8007bfb888,ffff80002a776008) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd806796c4b0,ffff80002a776008) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806796c4b0,ffff80002a776008) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806796c4b0,ffff80002a776008) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806796c4b0,ffff80002a776008) at closef+0x18d sys/kern/kern_descrip.c:1251 syscall(ffff80003c946f70) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c946f70) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc68c98a7710, count: -9