uvm_fault(0xffffffff839d4af0, 0xffff800023835ff8, 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 * 50562 558 0 0x2 0 0 syz-executor ffs_indirtrunc(fffffd806ef16b00,ffffffffffbff7f2,f0120,ffffffffffffffff,2,ffff80002a8b35d8) at ffs_indirtrunc+0x689 sys/ufs/ffs/ffs_inode.c:495 ffs_truncate(fffffd806ef16b00,0,0,ffffffffffffffff) at ffs_truncate+0x1036 sys/ufs/ffs/ffs_inode.c:297 ufs_inactive(ffff80002a8b3730) at ufs_inactive+0x1ff sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd806a1b4478,ffff80002a746008) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806a1b4478) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806a1b4118,fffffd806a1b4478,ffff80002a8b3898) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a746008,ffffff9c,77733a9aec10,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1923 syscall(ffff80002a8b3a00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8b3a00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77733a9af0c0, 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(0xffffffff839d4af0, 0xffff800023835ff8, 0, 1) -> d ddb> trace ffs_indirtrunc(fffffd806ef16b00,ffffffffffbff7f2,f0120,ffffffffffffffff,2,ffff80002a8b35d8) at ffs_indirtrunc+0x689 sys/ufs/ffs/ffs_inode.c:495 ffs_truncate(fffffd806ef16b00,0,0,ffffffffffffffff) at ffs_truncate+0x1036 sys/ufs/ffs/ffs_inode.c:297 ufs_inactive(ffff80002a8b3730) at ufs_inactive+0x1ff sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd806a1b4478,ffff80002a746008) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806a1b4478) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806a1b4118,fffffd806a1b4478,ffff80002a8b3898) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a746008,ffffff9c,77733a9aec10,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1923 syscall(ffff80002a8b3a00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8b3a00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77733a9af0c0, count: -9 ddb> show registers rdi 0x2 rsi 0x2 rbp 0xffff80002a8b34b0 rbx 0x7ff rdx 0 rcx 0xffffffffffbff7f2 rax 0xffff800023832000 r8 0xffffffffffffffff r9 0xffff80002a8b35d8 r10 0x38d03aab9fb4e0a1 r11 0x8175af5090d4e750 r12 0xfffffffdfffff7f3 r13 0x400000 acpi_pdirpa+0x3ebe71 r14 0x2 r15 0xfffffd806ef16b00 rip 0xffffffff81a21969 ffs_indirtrunc+0x689 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a8b33c0 ss 0x10 ffs_indirtrunc+0x689: movq 0(%rax,%rbx,8),%rbx ddb> show proc PROC (syz-executor) tid=50562 pid=558 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7462a0,0xffff80003c92a038 process=0xffff80002a7af190 user=0xffff80002a8ae000, vmspace=0xfffffd807d76e2e8 estcpu=36, cpticks=6, pctcpu=0.1, user=0, sys=5, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 87104 28427 79171 0 2 0 syz-executor 87104 486530 79171 0 3 0x4000080 bell syz-executor 80352 478360 7007 0 2 0 syz-executor 80352 338501 7007 0 3 0x4000080 fsleep syz-executor 29952 67090 77835 60929 2 0xc90 syz-executor 29952 437790 77835 60929 3 0x4000090 nanoslp syz-executor 29952 493475 77835 60929 3 0x4000090 fsleep syz-executor 71998 234755 1 0 3 0x82 nanoslp getty * 558 50562 32349 0 7 0x2 syz-executor 7007 457020 32349 0 2 0xc82 syz-executor 79171 143756 32349 0 2 0xc82 syz-executor 32419 199000 32349 0 3 0x82 nanoslp syz-executor 89564 411911 32349 0 2 0xc82 syz-executor 77835 5025 32349 0 3 0x82 nanoslp syz-executor 32349 504440 1 0 3 0x82 wait syz-executor 53581 429477 0 0 3 0x14200 bored smr 83198 54274 0 0 2 0x14200 zerothread 73986 224090 0 0 3 0x14200 aiodoned aiodoned 12290 179472 0 0 3 0x14200 syncer update 76475 347525 0 0 3 0x14200 cleaner cleaner 86798 456125 0 0 3 0x14200 reaper reaper 64342 485198 0 0 3 0x14200 pgdaemon pagedaemon 16016 389019 0 0 3 0x14200 bored viomb 27447 276873 0 0 3 0x40014200 acpi0 acpi0 894 103434 0 0 3 0x14200 bored softnet0 49194 164197 0 0 3 0x14200 bored systqmp 14378 74375 0 0 3 0x14200 bored systq 82882 257053 0 0 3 0x40014200 tmoslp softclock 70155 379341 0 0 3 0x40014200 idle0 1 204680 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb>