panic: kernel diagnostic assertion "pg->wire_count == 0" failed: file "/syzkaller/managers/main/kernel/sys/uvm/uvm_page.c", line 1285 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *213793 4683 0 0x14000 0x200 0 pagedaemon db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821acdc4) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff8220308e,ffffffff821cc8e6,505,ffffffff82213a4e) at __assert+0x2b sys/kern/subr_prf.c:154 uvm_pagedeactivate(fffffd8005a76d80) at uvm_pagedeactivate+0x1cf sys/uvm/uvm_page.c:1285 uvmpd_scan() at uvmpd_scan+0x43c sys/uvm/uvm_pdaemon.c:932 uvm_pageout(ffff8000fffff8b0) at uvm_pageout+0x4d4 end trace frame: 0x0, count: 9 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.