device: 0.940 kernel: 0.940 graphic: 0.937 debug: 0.650 semantic: 0.644 PID: 0.528 peripherals: 0.504 architecture: 0.491 performance: 0.455 hypervisor: 0.436 network: 0.416 ppc: 0.415 boot: 0.301 socket: 0.297 x86: 0.287 vnc: 0.277 mistranslation: 0.272 i386: 0.266 virtual: 0.259 register: 0.234 assembly: 0.227 arm: 0.226 permissions: 0.224 user-level: 0.180 risc-v: 0.140 VMM: 0.138 TCG: 0.134 KVM: 0.049 files: 0.048 megasas: Buffer I/O error on dev sda / critical target error, dev sda, sector 0 op 0x0:(READ) Description of problem: Since QEMU 7.2.0 when using `megasas` device the guest kernel is unable to I/O with the device (Input/output error) also producing errors messages in `dmesg` like these: ``` [ 18.739344] critical target error, dev sda, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 [ 18.739925] Buffer I/O error on dev sda, logical block 0, async page read [ 18.740374] Dev sda: unable to read RDB block 0 ``` Relevant options are: `-device megasas -blockdev driver=null-co,read-zeroes=on,node-name=null -device scsi-hd,drive=null` then in guest `modprobe megaraid-sas`. With qcow2 images - errors are the same. I also tested that the same commands produce no errors on QEMU 6.0.0 - 7.1.0.