uvm_fault(0xffffffff839f7c20, 0xffff800019965ff8, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs_indirtrunc+0x689: movq 0(%rax,%rbx,8),%rbx TID PID UID PRFLAGS PFLAGS CPU COMMAND ffs_indirtrunc(fffffd806cdacb00,fffffffffffffff4,963a0,ffffffffffffffff,0,ffff80002a7a5488) at ffs_indirtrunc+0x689 sys/ufs/ffs/ffs_inode.c:495 ffs_truncate(fffffd806cdacb00,0,0,ffffffffffffffff) at ffs_truncate+0x1036 sys/ufs/ffs/ffs_inode.c:297 ufs_inactive(ffff80002a7a55e0) at ufs_inactive+0x1ff sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd806cf22470,ffff80002a776a70) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vrele(fffffd806cf22470) at vrele+0x120 sys/kern/vfs_subr.c:837 uvm_unmap_detach(ffff80002a7a56e0,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1370 uvm_map_teardown(fffffd807ece2170) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2536 exit1(ffff80002a776a70,43,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a776a70,ffff80002a7a58a0,ffff80002a7a57f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a7a58a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7a58a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ee86dfa2470, count: 4 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(0xffffffff839f7c20, 0xffff800019965ff8, 0, 1) -> d ddb> trace ffs_indirtrunc(fffffd806cdacb00,fffffffffffffff4,963a0,ffffffffffffffff,0,ffff80002a7a5488) at ffs_indirtrunc+0x689 sys/ufs/ffs/ffs_inode.c:495 ffs_truncate(fffffd806cdacb00,0,0,ffffffffffffffff) at ffs_truncate+0x1036 sys/ufs/ffs/ffs_inode.c:297 ufs_inactive(ffff80002a7a55e0) at ufs_inactive+0x1ff sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd806cf22470,ffff80002a776a70) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vrele(fffffd806cf22470) at vrele+0x120 sys/kern/vfs_subr.c:837 uvm_unmap_detach(ffff80002a7a56e0,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1370 uvm_map_teardown(fffffd807ece2170) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2536 exit1(ffff80002a776a70,43,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a776a70,ffff80002a7a58a0,ffff80002a7a57f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a7a58a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7a58a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ee86dfa2470, count: -11 ddb> show registers rdi 0x2 rsi 0x2 rbp 0xffff80002a7a5360 rbx 0x7ff rdx 0 rcx 0xfffffffffffffff4 rax 0xffff800019962000 r8 0xffffffffffffffff r9 0xffff80002a7a5488 r10 0xd994bf3c08d0ec78 r11 0x4cf37744a118141f r12 0xfffffffffffff7f6 r13 0x1 r14 0x2 r15 0xfffffd806cdacb00 rip 0xffffffff8166ac39 ffs_indirtrunc+0x689 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a7a5270 ss 0x10 ffs_indirtrunc+0x689: movq 0(%rax,%rbx,8),%rbx ddb> show proc PROC (syz-executor) tid=26253 pid=10392 tcnt=0 stat=onproc flags process=a proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a747230,0xffff80002a776d18 process=0xffff80002a7ac490 user=0xffff80002a7a0000, vmspace=0xfffffd807ece2170 estcpu=36, cpticks=6, pctcpu=0.0, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 61687 333241 5914 0 2 0xc80 syz-executor 61687 305870 5914 0 3 0x4000080 fsleep syz-executor 61687 67834 5914 0 3 0x4000080 fsleep syz-executor 41843 456980 0 0 3 0x14200 acct acct 81411 103940 10392 0 2 0xc82 syz-executor 78953 67411 1 0 3 0x80 nanoslp init 37320 408935 10392 0 3 0x82 wait syz-executor 5914 98313 10392 0 2 0xc82 syz-executor 43829 384881 0 0 3 0x14200 bored smr 49676 16979 0 0 2 0x14200 zerothread 86987 398888 0 0 3 0x14200 aiodoned aiodoned 22341 11885 0 0 3 0x14200 syncer update 17069 476995 0 0 3 0x14200 cleaner cleaner 20682 25393 0 0 3 0x14200 reaper reaper 47193 506720 0 0 3 0x14200 pgdaemon pagedaemon 81240 476048 0 0 3 0x14200 bored viomb 6336 78696 0 0 3 0x40014200 acpi0 acpi0 95964 62904 0 0 2 0x14200 softnet0 8451 417422 0 0 3 0x14200 smrbar systqmp 52616 522754 0 0 3 0x14200 bored systq 16009 157153 0 0 3 0x40014200 tmoslp softclock 83798 201619 0 0 3 0x40014200 idle0 1 317181 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb>