panic: pool_p_free: rttmr free list modified: page 0xfffffd806b1d2000; item addr 0xfffffd806b1d2e60; offset 0x10=0x82dfa950 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 36474 7436 0 0x14000 0x200 0 systqmp db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828d80b3) at panic+0x17b sys/kern/subr_prf.c:198 pool_p_free(ffffffff82d66438,fffffd806b1d2f90) at pool_p_free+0x20f sys/kern/subr_pool.c:984 pool_gc_pages(0) at pool_gc_pages+0x255 sys/kern/subr_pool.c:1583 taskq_thread(ffffffff82d3df30) at taskq_thread+0xf5 sys/kern/kern_task.c:448 end trace frame: 0x0, count: 10 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.