uvm_fault(0xffffffff839b9bc0, 0xffff800029f26000, 0, 2) -> e kernel: page fault trap, code=2 Stopped at kcov_remote_enter+0x122: movq $0,0(%rcx) TID PID UID PRFLAGS PFLAGS CPU COMMAND *523391 15714 0 0x2 0 0 syz-executor kcov_remote_enter(0,ffff80002a7df190) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff837aba40,ffff80002a777560) at timeout_run+0xc2 sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a777560,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756 softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788 softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87 dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 uvm_vnp_setsize(fffffd806f362500,0) at uvm_vnp_setsize ufs_rmdir(ffff80002a8f2d20) at ufs_rmdir+0x2ee sys/ufs/ufs/ufs_vnops.c:1265 VOP_RMDIR(fffffd8067832208,fffffd806df7fcc8,ffff80002a8f2df8) at VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413 dounlinkat(ffff80002a7bd240,ffffff9c,778662f6ad20,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1901 syscall(ffff80002a8f2f60) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8f2f60) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x778662f6ad10, count: 2 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.