uvm_fault(0xfffffd806bbb05d8, 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(ffff800001491080) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003b1622b8) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003b1622b8) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff800035d3f1a0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806a555600,81,fffffd8007bfb750,ffff80003b1622b8) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd80792deca8,ffff80003b1622b8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80792deca8,ffff80003b1622b8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd80792deca8,ffff80003b1622b8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd80792deca8,ffff80003b1622b8) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80003b1622b8) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80003b1622b8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003b1622b8,ffff800035d3f510,ffff800035d3f460) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800035d3f510) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800035d3f510) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ef9e44008b0, 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(0xfffffd806bbb05d8, 0x0, 0, 1) -> e ddb> trace dt_ioctl_record_stop(ffff800001491080) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003b1622b8) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003b1622b8) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff800035d3f1a0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806a555600,81,fffffd8007bfb750,ffff80003b1622b8) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd80792deca8,ffff80003b1622b8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80792deca8,ffff80003b1622b8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd80792deca8,ffff80003b1622b8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd80792deca8,ffff80003b1622b8) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80003b1622b8) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80003b1622b8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003b1622b8,ffff800035d3f510,ffff800035d3f460) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800035d3f510) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800035d3f510) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ef9e44008b0, count: -12 ddb> show registers rdi 0 rsi 0 rbp 0xffff800035d3f0d0 rbx 0xffffffff81a6e1a0 dtclose rdx 0 rcx 0xffff80003b1622b8 rax 0xffffffff837c63b8 dt_prov_syscall r8 0xffffffffffffffff r9 0 r10 0xa9697405f786b5b4 r11 0x482f2d2600ce7d4d r12 0xffff80000004bf00 r13 0 r14 0 r15 0xffff800001492a00 rip 0xffffffff81a6e520 dt_ioctl_record_stop+0xf0 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff800035d3f0a0 ss 0x10 dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 ddb> show proc PROC (syz-executor) tid=354482 pid=25727 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=59, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003b1622b8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003b163738,0xffff80003b1639d8 process=0xffff80003b161b70 user=0xffff800035d3a000, vmspace=0xfffffd806bbb05d8 estcpu=9, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 88769 215610 48635 0 2 0 syz-executor 88769 481767 48635 0 3 0x4000080 kqsel syz-executor 3120 1649 64865 0 2 0 syz-executor 3120 280593 64865 0 3 0x4000080 semwait syz-executor 6069 56379 80826 0 2 0 syz-executor 6069 141757 80826 0 3 0x4000080 fsleep syz-executor 29705 244953 37996 0 2 0 syz-executor 29705 399960 37996 0 3 0x4000080 fsleep syz-executor 94509 475883 94883 0 3 0x80 nanoslp syz-executor 94509 150924 94883 0 3 0x4000080 msgwait syz-executor 72549 398833 16041 60928 3 0x90 nanoslp syz-executor 72549 173951 16041 60928 3 0x4000090 kqread syz-executor 72549 430473 16041 60928 3 0x4000090 fsleep syz-executor 24740 231792 0 0 3 0x14200 bored sosplice 44762 293245 84668 0 3 0x82 nanoslp syz-executor 94883 179002 84668 0 3 0x82 nanoslp syz-executor 37996 294130 84668 0 3 0x82 nanoslp syz-executor 64865 315540 84668 0 3 0x82 nanoslp syz-executor 16041 108155 84668 0 3 0x82 nanoslp syz-executor 80826 183277 84668 0 3 0x82 nanoslp syz-executor 55218 16807 84668 0 2 0x10000082 syz-executor 48635 165931 84668 0 3 0x82 nanoslp syz-executor 84668 21994 45209 0 3 0x82 kqread syz-executor 45209 307813 43015 0 3 0x10008a sigsusp ksh 43015 405670 12782 0 3 0x98 kqread sshd-session 12782 427374 45188 0 3 0x92 kqread sshd-session 21139 193950 1 0 3 0x100083 ttyin getty 45188 79559 1 0 3 0x88 kqread sshd 39041 389510 91519 73 3 0x1100090 kqread syslogd 91519 451296 1 0 3 0x100082 sbwait syslogd 24148 138537 1 0 3 0x100080 kqread resolvd 97157 148315 25747 77 3 0x100092 kqread dhcpleased 63884 364378 25747 77 3 0x100092 kqread dhcpleased 25747 328068 1 0 3 0x80 kqread dhcpleased 59706 70761 0 0 3 0x14200 bored smr 3074 53522 0 0 2 0x14200 zerothread 50802 222795 0 0 3 0x14200 aiodoned aiodoned 3493 184105 0 0 3 0x14200 syncer update 70418 40645 0 0 3 0x14200 cleaner cleaner 29561 218990 0 0 3 0x14200 reaper reaper 48369 176120 0 0 3 0x14200 pgdaemon pagedaemon 68031 342884 0 0 3 0x14200 bored viomb 5625 430454 0 0 3 0x40014200 acpi0 acpi0 94162 169207 0 0 3 0x14200 bored softnet7 99921 261600 0 0 3 0x14200 bored softnet6 28289 125531 0 0 3 0x14200 bored softnet5 36914 11959 0 0 3 0x14200 bored softnet4 78775 372699 0 0 3 0x14200 bored softnet3 17817 267908 0 0 3 0x14200 bored softnet2 24406 267914 0 0 3 0x14200 bored softnet1 10664 213084 0 0 3 0x14200 bored softnet0 90912 157396 0 0 3 0x14200 bored systqmp 67925 130741 0 0 3 0x14200 bored systq 45777 7238 0 0 3 0x40014200 tmoslp softclock 928 228462 0 0 3 0x40014200 idle0 1 146282 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 11141K 11389K 166960K 11564 0 pcb 17 16K 17K 166960K 122 0 rtable 221 7K 9K 166960K 323 0 pf 30 12K 16K 166960K 56 0 ifaddr 42 7K 7K 166960K 48 0 ifgroup 50 2K 2K 166960K 58 0 sysctl 3 1K 9K 166960K 9 0 counters 32 17K 18K 166960K 37 0 ioctlops 0 0K 4K 166960K 38 0 iov 0 0K 12K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1438 90K 91K 166960K 1528 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 6 0K 0K 166960K 6 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 218 0 sigio 0 0K 0K 166960K 1 0 proc 60 59K 83K 166960K 479 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 5 0 in_multi 99 7K 7K 166960K 100 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 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 358 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 216 159K 166K 166960K 3492 0 UVM aobj 7 2K 4K 166960K 8 0 pinsyscall 38 76K 92K 166960K 1250 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 9 0 NDP 11 0K 2K 166960K 31 0 temp 39 8666K 8730K 166960K 4175 0 kqueue 15 24K 26K 166960K 33 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 44 0 41 1 0 1 1 0 8 0 rtentry 136 96 0 1 4 0 4 4 0 8 0 unpcb 144 136 0 121 4 0 4 4 0 8 3 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 87 0 82 7 0 7 7 0 8 6 arp 88 11 0 0 1 0 1 1 0 8 0 inpcb 328 437 0 427 7 0 7 7 0 8 5 nd6 104 16 0 0 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 5 0 5 1 0 1 1 0 8 1 pfosfp 40 1 0 0 1 0 1 1 0 8 0 pfosfpen 112 1 0 0 1 0 1 1 0 8 0 pfrktable 1344 13 0 13 1 0 1 1 0 8 1 pfanchor 1288 2 0 2 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 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 437 0 0 28 0 28 28 0 8 0 art_table 40 439 0 0 5 0 5 5 0 8 0 art_node 32 96 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 3 0 0 1 0 1 1 0 8 0 shmpl 112 5 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1714 0 207 95 0 95 95 0 8 0 ffsino 256 1714 0 207 95 0 95 95 0 8 0 nchpl 144 2012 0 331 63 0 63 63 0 8 0 uvmvnodes 80 1937 0 0 40 0 40 40 0 8 0 vnodes 216 1937 0 0 108 0 108 108 0 8 0 namei 1024 6353 0 6353 2 0 2 2 0 8 2 pfiaddrpl 120 4 0 4 1 0 1 1 0 8 1 kstatmem 264 30 0 8 2 0 2 2 0 8 0 scxspl 216 7220 0 7220 8 0 8 8 1 8 8 plimitpl 152 45 0 27 1 0 1 1 0 8 0 sigapl 424 503 0 452 7 0 7 7 0 8 1 knotepl 120 5470 0 5421 2 0 2 2 0 8 0 kqueuepl 184 72 0 59 3 0 3 3 0 8 2 pipepl 304 142 0 113 3 0 3 3 0 8 0 fdescpl 448 482 0 453 5 0 5 5 0 8 1 filepl 120 2364 0 2147 11 0 11 11 0 8 3 lockfpl 104 53 0 51 1 0 1 1 0 8 0 lockfspl 48 25 0 23 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 14 1 0 1 1 0 8 0 ucredpl 104 171 0 159 1 0 1 1 0 8 0 zombiepl 144 454 0 452 1 0 1 1 0 8 0 processpl 1168 503 0 452 5 0 5 5 0 8 1 procpl 656 634 0 576 6 0 6 6 0 8 0 sockpl 552 621 0 593 8 0 8 8 0 8 5 mcl64k 65536 7 0 7 1 0 1 1 0 8 1 mcl8k 8192 5 0 5 1 0 1 1 0 8 1 mcl4k 4096 2528 0 2477 14 0 14 14 0 8 7 mcl2k 2048 263 0 262 1 0 1 1 0 8 0 mtagpl 96 7 0 4 1 0 1 1 0 8 0 mbufpl 256 4587 0 4441 11 0 11 11 0 8 0 bufpl 280 3145 0 125 216 0 216 216 0 8 0 anonpl 24 109358 0 106322 46 0 46 46 0 187 22 amapchunkpl 152 10297 0 9857 21 0 21 21 0 158 2 amappl16 200 2295 0 2272 15 0 15 15 0 8 12 amappl15 192 18 0 18 1 0 1 1 0 8 1 amappl14 184 128 0 118 1 0 1 1 0 8 0 amappl13 176 11 0 11 1 0 1 1 0 8 1 amappl12 168 1092 0 1063 3 0 3 3 0 8 1 amappl11 160 44 0 34 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 0 1 1 0 8 1 amappl9 144 249 0 249 1 0 1 1 0 8 1 amappl8 136 24 0 23 1 0 1 1 0 8 0 amappl7 128 100 0 89 1 0 1 1 0 8 0 amappl6 120 174 0 171 1 0 1 1 0 8 0 amappl5 112 111 0 104 1 0 1 1 0 8 0 amappl4 104 261 0 247 1 0 1 1 0 8 0 amappl3 96 1732 0 1632 3 0 3 3 0 8 0 amappl2 88 605 0 551 2 0 2 2 0 8 0 amappl1 80 8247 0 7704 13 0 13 13 0 8 1 amappl 88 2842 0 2691 4 0 4 4 0 92 0 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 7 0 1 1 0 1 1 0 8 0 uaddrrnd 24 482 0 453 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 482 0 453 1 0 1 1 0 8 0 vmmpekpl 168 5429 0 5397 2 0 2 2 0 8 0 vmmpepl 168 37245 0 35453 93 0 93 93 0 357 12 vmsppl 368 481 0 453 4 0 4 4 0 8 1 rwobjpl 40 15146 0 12391 30 0 30 30 0 8 1 pdppl 4096 970 0 906 92 26 66 78 0 8 2 pvpl 32 242465 0 233804 121 0 121 121 0 265 38 pmappl 216 481 0 453 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 370 0 26 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace dt_ioctl_record_stop(ffff800001491080) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003b1622b8) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003b1622b8) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff800035d3f1a0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806a555600,81,fffffd8007bfb750,ffff80003b1622b8) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd80792deca8,ffff80003b1622b8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80792deca8,ffff80003b1622b8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd80792deca8,ffff80003b1622b8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd80792deca8,ffff80003b1622b8) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80003b1622b8) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80003b1622b8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003b1622b8,ffff800035d3f510,ffff800035d3f460) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800035d3f510) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800035d3f510) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ef9e44008b0, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace dt_ioctl_record_stop(ffff800001491080) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003b1622b8) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003b1622b8) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff800035d3f1a0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806a555600,81,fffffd8007bfb750,ffff80003b1622b8) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd80792deca8,ffff80003b1622b8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80792deca8,ffff80003b1622b8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd80792deca8,ffff80003b1622b8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd80792deca8,ffff80003b1622b8) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80003b1622b8) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80003b1622b8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003b1622b8,ffff800035d3f510,ffff800035d3f460) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800035d3f510) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800035d3f510) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ef9e44008b0, count: -12