valgrind --malloc-fill=0x69 --free-fill=0x11 Process terminating with default action of signal 11 (SIGSEGV) ==00:00:01:03.046 29447== Access not within mapped region at address 0x11111151 ==00:00:01:03.046 29447== at 0x80B4713: scsi_req_free (scsi-bus.c:153) ==00:00:01:03.047 29447== by 0x80B186B: scsi_remove_request (scsi-disk.c:86) ==00:00:01:03.047 29447== by 0x8095280: qcow_aio_write_cb (qcow2.c:640) ==00:00:01:03.047 29447== by 0x80849BE: posix_aio_process_queue (posix-aio-compat.c:460) ==00:00:01:03.047 29447== by 0x8084A76: posix_aio_read (posix-aio-compat.c:501) ==00:00:01:03.047 29447== by 0x805E3D7: main_loop_wait (vl.c:1300) ==00:00:01:03.047 29447== by 0x806EA83: kvm_main_loop (qemu-kvm.c:1710) ==00:00:01:03.047 29447== by 0x8060A72: main (vl.c:1340)
It seems, that 0x11111151 - is a pointer inside already freed region :( http://dl3.ideco-software.ru/IdecoICS/IdecoICS_342_123.iso http://dl1.ideco-software.ru/IdecoICS/IdecoICS_342_123.iso http://dl2.ideco-software.ru/IdecoICS/IdecoICS_342_123.iso (If you get 404, please inform me, I will give new links.) Instructions how to reproduce: after boot: type "setup100hz action=install p=1" and press Enter. Line should look as: boot: setup100hz action=install p=1 In each experiment You need fresh (empty) "qemu-img create -f qcow2 8G" image (preferable in tmpfs filesystem) Image will be expanded nearly to 1.5 Gb. I have VMX-enabled Intel processor and 32-bit kernel. KVM was built just using ./configure && make command: qemu-system-x86_64 -drive file=xxx.img,cache=writeback,if=scsi -cdrom IdecoICS_342_123.iso It will show some dialogs while copying files after which it will go to reboot if all OK. In our case: somewhere during copying files, kvm will do segmentation fault, before rebooting of VM. -- KVM segmentation fault, using SCSI+writeback and linux 2.4 guest https://bugs.launchpad.net/bugs/595438 You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. Status in QEMU: Confirmed Bug description: I Use Ubuntu 32 bit 10.04 with standard KVM. I have Intel E7600 @ 3.06GHz processor with VMX In this system I Run: LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/kvm -M pc-0.12 -enable-kvm -m 256 -smp 1 -name spamsender -uuid b9cacd5e-08f7-41fd-78c8-89cec59af881 -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/spamsender.monitor,server,nowait -monitor chardev:monitor -boot d -drive file=/mnt/megadiff/cdiso_400_130.iso,if=ide,media=cdrom,index=2 -drive file=/home/mmarkk/spamsender2.img,if=scsi,index=0,format=qcow2,cache=writeback -net nic,macaddr=00:00:00:00:00:00,vlan=0,name=nic.0 -net tap,vlan=0,name=tap.0 -chardev pty,id=serial0 -serial chardev:serial0 -parallel none -usb -vnc 127.0.0.1:0 -vga cirrus .iso image contain custom distro of 2.4-linux kernel based system. During install process (when .tar.gz actively unpacked), kvm dead with segmentation fault. And ONLY when I choose scsi virtual disk and writeback simultaneously. But, writeback+ide, writethrough+scsi works OK. I use qcow2. It seems, that qcow does not have such problems. Virtual machine get down at random time during file copy. It seems, when qcow2 file size need to be expanded.
