uvm_fault(0xfffffd806fbf91b8, 0xa, 0, 1) -> e kernel: page fault trap, code=0 Stopped at vio_rxeof+0x196: movzwl 0xa(%rbx),%r12d TID PID UID PRFLAGS PFLAGS CPU COMMAND *464129 71298 0 0x8000000 0 0 syz-executor.1 295967 34962 60928 0x8000010 0 1 syz-executor.3 vio_rxeof(ffff8000001a0000) at vio_rxeof+0x196 sys/dev/pv/if_vio.c:1120 vio_rx_intr(ffff8000001a0050) at vio_rx_intr+0x48 sys/dev/pv/if_vio.c:1160 intr_handler(ffff80002a2bd1b0,ffff80000067b200) at intr_handler+0x93 sys/arch/amd64/amd64/intr.c:543 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f end of kernel end trace frame: 0x711f3d112ae0, count: 11 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.