panic: kernel diagnostic assertion "uvm_page_owner_locked_p(pg) " failed: file "/syzkaller/managers/main/kernel/sys/uvm/uvm_pag e.c", line 1248 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *453162 92410 0 0x14000 0x200 0 reaper db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830b4120) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83068a43,ffffffff82fba65d,4e0,ffffffff830bdb93 ) at __assert+0x29 uvm_pageunwire(fffffd8006b99a00) at uvm_pageunwire+0x1dd sys/uvm/uvm_page.c:1248 uvm_fault_unwire_locked(fffffd807e105818,c1ca7d6d000,c1ca7f6c00 0) at uvm_fault_unwire_locked+0x33e sys/uvm/uvm_fault.c:1695 uvm_unmap_kill_entry_withlock(fffffd807e105818,fffffd806c199d78 ,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1861 uvm_map_teardown(fffffd807e105818) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498 uvmspace_free(fffffd807e105818) at uvmspace_free+0xbd sys/uvm/uvm_map.c:3422 reaper(ffff80002a457958) at reaper+0x225 sys/kern/kern_exit.c:478 end trace frame: 0x0, count: 6 https://www.openbsd.org/ddb.html describes the minimum info req uired in bug reports. Insufficient info makes it difficult to find and fix b ugs.