login: uvm_fault(0xfffff1007f22e730, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND dt_ioctl_record_stop(ffff800001649b00) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,1,2000,ffff80002a7374c8) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80002a7374c8) at dtclose+0xd9 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a7893a0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffff10070646d98,1,fffff10007ffd5b0,ffff80002a7374c8) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffff1007f160878,ffff80002a7374c8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffff1007f160878,ffff80002a7374c8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:621 fdrop(fffff1007f160878,ffff80002a7374c8) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffff1007f160878,ffff80002a7374c8) at closef+0x190 sys/kern/kern_descrip.c:1265 fdfree(ffff80002a7374c8) at fdfree+0x115 sys/kern/kern_descrip.c:1196 exit1(ffff80002a7374c8,0,0,1) at exit1+0x595 sys/kern/kern_exit.c:215 sys_exit(ffff80002a7374c8,ffff80002a789700,ffff80002a789650) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a789700) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a789700) at syscall+0x962 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78e9fdba53d0, 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(0xfffff1007f22e730, 0x0, 0, 1) -> e ddb> show kasan No such command ddb> trace dt_ioctl_record_stop(ffff800001649b00) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,1,2000,ffff80002a7374c8) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80002a7374c8) at dtclose+0xd9 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a7893a0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffff10070646d98,1,fffff10007ffd5b0,ffff80002a7374c8) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffff1007f160878,ffff80002a7374c8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffff1007f160878,ffff80002a7374c8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:621 fdrop(fffff1007f160878,ffff80002a7374c8) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffff1007f160878,ffff80002a7374c8) at closef+0x190 sys/kern/kern_descrip.c:1265 fdfree(ffff80002a7374c8) at fdfree+0x115 sys/kern/kern_descrip.c:1196 exit1(ffff80002a7374c8,0,0,1) at exit1+0x595 sys/kern/kern_exit.c:215 sys_exit(ffff80002a7374c8,ffff80002a789700,ffff80002a789650) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a789700) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a789700) at syscall+0x962 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78e9fdba53d0, count: -12 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002a7892d0 rbx 0x1 rdx 0 rcx 0xffff80002a7374c8 rax 0xffffffff8396b8d0 dt_prov_static r8 0 r9 0 r10 0x56e86899cd8601dd r11 0xa5002ecf0b62999a r12 0 r13 0 r14 0 r15 0xffff80000166fb00 rip 0xffffffff81046ee8 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80002a7892a0 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb> show proc PROC (syz-executor) tid=394252 pid=58758 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a7374c8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a77c2b8,0xffff80002a778a80 process=0xffff800045ffad18 user=0xffff80002a784000, vmspace=0xfffff1007f22e730 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 55268 189922 48755 0 3 0 0x80 fsleep syz-executor 55268 171212 48755 0 3 0 0x4000000 biowait syz-executor 13796 225050 23422 0 3 0 0x80 fsleep syz-executor 13796 313171 23422 0 3 0 0x4000000 smrbar syz-executor 13796 45632 23422 0 3 0 0x4000080 fsleep syz-executor 90138 513490 32644 0 3 0 0x80 fsleep syz-executor 90138 78689 32644 0 3 0 0x4000080 lockf syz-executor 48964 363856 49421 0 3 0x10 0x80 fsleep syz-executor 48964 354069 49421 0 3 0x10 0x4000080 ttyopn syz-executor 76320 493222 30018 0 3 0 0x80 fsleep syz-executor 76320 42748 30018 0 3 0 0x4000080 rest syz-executor 20638 452022 1 0 3 0x100003 0x80 ttyin getty 30018 328157 93204 0 3 0x2 0x80 nanoslp syz-executor 18552 496632 93204 0 3 0x2 0x80 nanoslp syz-executor 66541 289243 93204 0 3 0x2 0x80 wait syz-executor 23422 131733 93204 0 3 0x2 0x80 nanoslp syz-executor 48755 161723 93204 0 3 0x2 0x80 nanoslp syz-executor 49421 353380 93204 0 3 0x2 0x80 nanoslp syz-executor 32644 382188 93204 0 3 0x2 0x80 nanoslp syz-executor 83390 216269 93204 0 2 0x2 0x1 syz-executor 93204 53272 1 0 3 0x2 0x80 kqread syz-executor 66578 378918 0 0 3 0x14000 0x200 bored smr 57488 166344 0 0 2 0x14000 0x200 zerothread 65518 495514 0 0 3 0x14000 0x200 aiodoned aiodoned 99584 173726 0 0 3 0x14000 0x200 syncer update 10046 74311 0 0 3 0x14000 0x200 cleaner cleaner 70211 225572 0 0 2 0x14000 0x200 reaper 88757 215864 0 0 3 0x14000 0x200 pgdaemon pagedaemon 9730 343960 0 0 3 0x14000 0x200 bored viomb 86284 470469 0 0 3 0x14000 0x40000200 acpi0 acpi0 95288 215663 0 0 3 0x14000 0x200 bored softnet0 39748 95218 0 0 3 0x14000 0x200 smrbar systqmp 57768 329795 0 0 3 0x14000 0x200 bored systq 27408 132879 0 0 3 0x14000 0x40000200 tmoslp softclock 25956 35466 0 0 3 0x14000 0x40000200 idle0 1 381870 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11055 12272K 13218K 166960K 12667 0 pcb 21 13K 14K 166960K 108 0 rtable 232 7K 7K 166960K 392 0 pf 33 13K 17K 166960K 59 0 ifaddr 42 7K 7K 166960K 57 0 ifgroup 54 2K 2K 166960K 74 0 sysctl 2 1K 9K 166960K 6 0 counters 34 17K 18K 166960K 42 0 ioctlops 0 0K 4K 166960K 100 0 iov 0 0K 16K 166960K 14 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1426 90K 90K 166960K 1626 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 13 2K 2K 166960K 15 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 16 61K 97K 166960K 305 0 sigio 0 0K 0K 166960K 5 0 proc 20 25K 124K 166960K 540 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 10 0 in_multi 88 5K 6K 166960K 103 0 ether_multi 1 0K 0K 166960K 1 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 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 387 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 135 82K 175K 166960K 4359 0 UVM aobj 7 2K 2K 166960K 8 0 pinsyscall 19 38K 96K 166960K 1413 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 12 0K 2K 166960K 35 0 temp 37 9106K 9170K 166960K 7990 0 kqueue 1 2K 26K 166960K 68 0 SYN cache 2 16K 16K 166960K 2 0 ddb>