panic: uvm_fault_unwire_locked: address not in map Stopped at db_enter+0xa: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 88937 25855 0 0 0x4000000 0K syz-executor0 db_enter() at db_enter+0xa panic() at panic+0x147 uvm_fault_unwire_locked(20001000,20003000,0) at uvm_fault_unwire_locked+0x270 uvm_fault_unwire(1000,ffffff0078b82900,1000) at uvm_fault_unwire+0x3b physio(ffff800021163d38,ffffff007ea11ad8,ffffff007ea11ad8,ffff800021163d38,ffff800021163c08) at physio+0x2ba spec_read(0) at spec_read+0xa5 VOP_READ(ffff800021163d38,ffffff007ea11ad8,ffffff0067f77da8,0) at VOP_READ+0x5e vn_read(ffffff0067f77da8,ffff8000210a24c8,1000) at vn_read+0x130 dofilereadv(0,1,ffff8000210a24c8,ffff800021163e60,ffff800021163e78) at dofilereadv+0x14f sys_readv(780,ffff8000210a24c8,0) at sys_readv+0xce syscall(0) at syscall+0x489 Xsyscall(6,0,ffffffffffffffbc,0,3,c6f1bb4f010) at Xsyscall+0x128 end of kernel end trace frame: 0xc71a0a10580, 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{0}> ddb{0}> set $lines = 0 ddb{0}> show panic uvm_fault_unwire_locked: address not in map ddb{0}> trace db_enter() at db_enter+0xa panic() at panic+0x147 uvm_fault_unwire_locked(20001000,20003000,0) at uvm_fault_unwire_locked+0x270 uvm_fault_unwire(1000,ffffff0078b82900,1000) at uvm_fault_unwire+0x3b physio(ffff800021163d38,ffffff007ea11ad8,ffffff007ea11ad8,ffff800021163d38,ffff800021163c08) at physio+0x2ba spec_read(0) at spec_read+0xa5 VOP_READ(ffff800021163d38,ffffff007ea11ad8,ffffff0067f77da8,0) at VOP_READ+0x5evn_read(ffffff0067f77da8,ffff8000210a24c8,1000) at vn_read+0x130 dofilereadv(0,1,ffff8000210a24c8,ffff800021163e60,ffff800021163e78) at dofilereadv+0x14f sys_readv(780,ffff8000210a24c8,0) at sys_readv+0xce syscall(0) at syscall+0x489 Xsyscall(6,0,ffffffffffffffbc,0,3,c6f1bb4f010) at Xsyscall+0x128 end of kernel end trace frame: 0xc71a0a10580, count: -12 ddb{0}> show registers rdi 0xffffffff81e2ec58 kprintf_mutex rsi 0xffffffff81b67d99 db_enter+0x9 rbp 0xffff8000211639b0 rbx 0xffff800021163a50 rdx 0xffff800000ad6000 rcx 0x2017 __ALIGN_SIZE+0x1017 rax 0xffff800000ad6000 r8 0xffff800021163980 r9 0 r10 0 r11 0xffffffff819e6130 x86_bus_space_io_read_1 r12 0x3000000008 r13 0xffff8000211639c0 r14 0x100 r15 0xffffffff81c64a00 cy_pio_rec+0x16700 rip 0xffffffff81b67d9a db_enter+0xa cs 0x8 rflags 0x206 rsp 0xffff8000211639b0 ss 0x10 db_enter+0xa: popq %rbp ddb{0}> show proc PROC (syz-executor0) pid=88937 stat=onproc flags process=0 proc=4000000 pri=17, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000210a2018,0xffff8000210a2988 process=0xffff8000210b6668 user=0xffff80002115e000, vmspace=0xffffff007f124210 estcpu=32, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 25855 484499 5387 0 3 0x80 nanosleep syz-executor0 *25855 88937 5387 0 7 0x4000000 syz-executor0 25855 467190 5387 0 3 0x4000080 fsleep syz-executor0 98704 445528 1 0 3 0x100083 ttyin getty 54302 297473 0 0 3 0x14200 bored sosplice 76934 207114 36853 0 3 0x82 nanosleep syz-executor1 5387 496271 36853 0 3 0x82 nanosleep syz-executor0 36853 170407 87705 0 3 0x82 thrsleep syz-fuzzer 36853 266169 87705 0 3 0x4000082 thrsleep syz-fuzzer 36853 23969 87705 0 3 0x4000082 thrsleep syz-fuzzer 36853 132100 87705 0 3 0x4000082 thrsleep syz-fuzzer 36853 21083 87705 0 3 0x4000082 thrsleep syz-fuzzer 36853 492500 87705 0 3 0x4000082 thrsleep syz-fuzzer 36853 444894 87705 0 3 0x4000082 thrsleep syz-fuzzer 36853 138044 87705 0 3 0x4000082 kqread syz-fuzzer 36853 488373 87705 0 3 0x4000082 thrsleep syz-fuzzer 36853 382933 87705 0 3 0x4000082 thrsleep syz-fuzzer 87705 398029 89228 0 3 0x10008a pause ksh 89228 168703 79778 0 3 0x92 select sshd 79778 167684 1 0 3 0x80 select sshd 25073 249573 99407 73 3 0x100090 kqread syslogd 99407 19790 1 0 3 0x100082 netio syslogd 36198 360112 1 77 3 0x100090 poll dhclient 1637 173798 1 0 3 0x80 poll dhclient 74124 518545 0 0 3 0x14200 pgzero zerothread 82459 221701 0 0 3 0x14200 aiodoned aiodoned 38837 118845 0 0 3 0x14200 syncer update 57683 356649 0 0 3 0x14200 cleaner cleaner 61419 172618 0 0 3 0x14200 reaper reaper 95723 322171 0 0 3 0x14200 pgdaemon pagedaemon 78771 511271 0 0 3 0x14200 bored crynlk 61137 19745 0 0 3 0x14200 bored crypto 43216 51717 0 0 3 0x40014200 acpi0 acpi0 90220 321800 0 0 7 0x40014200 idle1 67033 55321 0 0 3 0x14200 bored softnet 97251 29740 0 0 3 0x14200 bored systqmp 53955 243122 0 0 3 0x14200 bored systq 46430 158249 0 0 2 0x40014200 softclock 79134 968 0 0 3 0x40014200 idle0 1 252644 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper