diff options
Diffstat (limited to 'results/classifier/zero-shot/108/debug/1314857')
| -rw-r--r-- | results/classifier/zero-shot/108/debug/1314857 | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/results/classifier/zero-shot/108/debug/1314857 b/results/classifier/zero-shot/108/debug/1314857 new file mode 100644 index 00000000..4aa9c897 --- /dev/null +++ b/results/classifier/zero-shot/108/debug/1314857 @@ -0,0 +1,110 @@ +debug: 0.965 +other: 0.946 +permissions: 0.946 +semantic: 0.938 +boot: 0.928 +socket: 0.918 +graphic: 0.913 +vnc: 0.912 +PID: 0.906 +performance: 0.900 +KVM: 0.899 +device: 0.868 +files: 0.853 +network: 0.818 + +seg fault in ivshmem when using ioeventfd=on + +When launching qemu with the ivshmem device and the nahanni guest server there is segmentation fault in the setup_ioeventfds function of ivshmem.c. If the ioeventfd=on flag is set the pci_ivshmem_init will call setup_ioeventfds at line 668. This function relies on the 'peers' member of the server info which is not allocated until line 669. + +To reproduce you will need the nahanni guest server code. The driver code is not needed. You will also need a qcow2 or other bootable image to use for launching qemu. The error occurs before the actual image launch. + +Start the nahanni ivshmem server with a small global memory space ( although the bug is not allocation specific ) +ivshmem -m 1 -n 2 -p /tmp/ivshmem_socket + +Next launch qemu with initialization for the ivshmem device. +qemu-system-x86_64 -hda test_iso.qcow2 -localtime -boot c -chardev socket,path="/tmp/ivshmem_socket",id=ivshmem_socket -device ivshmem,chardev=ivshmem_socket,size=1,ioeventfd=on + +If gdb is used the following error is recorded: +Program received signal SIGSEGV, Segmentation fault. +0x000055555579dd52 in setup_ioeventfds (s=0x555556619580) + at /home/genes/work/ubuntu/qemu-kvm-1.0+noroms/hw/ivshmem.c:367 +367 for (j = 0; j < s->peers[i].nb_eventfds; j++) { +(gdb) print s->peers +$2 = (Peer *) 0x0 + +When I tried the same thing with git master (latest) I get a different error: +qemu_chr_fe_claim_no_fail: error chardev "(null)" already used + +Hello, + +The patch for this later bug has been proposed. I'm not sure why it's not +merged. + +http://patchwork.ozlabs.org/patch/316785/ + +Cheers, +Cam + + +On Thu, May 1, 2014 at 10:53 AM, Gene Snider <email address hidden> wrote: + +> When I tried the same thing with git master (latest) I get a different +> error: +> qemu_chr_fe_claim_no_fail: error chardev "(null)" already used +> +> ** Also affects: qemu-kvm (Ubuntu) +> Importance: Undecided +> Status: New +> +> -- +> You received this bug notification because you are a member of qemu- +> devel-ml, which is subscribed to QEMU. +> https://bugs.launchpad.net/bugs/1314857 +> +> Title: +> seg fault in ivshmem when using ioeventfd=on +> +> Status in QEMU: +> New +> Status in “qemu-kvm” package in Ubuntu: +> New +> +> Bug description: +> When launching qemu with the ivshmem device and the nahanni guest +> server there is segmentation fault in the setup_ioeventfds function of +> ivshmem.c. If the ioeventfd=on flag is set the pci_ivshmem_init will +> call setup_ioeventfds at line 668. This function relies on the 'peers' +> member of the server info which is not allocated until line 669. +> +> To reproduce you will need the nahanni guest server code. The driver +> code is not needed. You will also need a qcow2 or other bootable image +> to use for launching qemu. The error occurs before the actual image +> launch. +> +> Start the nahanni ivshmem server with a small global memory space ( +> although the bug is not allocation specific ) +> ivshmem -m 1 -n 2 -p /tmp/ivshmem_socket +> +> Next launch qemu with initialization for the ivshmem device. +> qemu-system-x86_64 -hda test_iso.qcow2 -localtime -boot c -chardev +> socket,path="/tmp/ivshmem_socket",id=ivshmem_socket -device +> ivshmem,chardev=ivshmem_socket,size=1,ioeventfd=on +> +> If gdb is used the following error is recorded: +> Program received signal SIGSEGV, Segmentation fault. +> 0x000055555579dd52 in setup_ioeventfds (s=0x555556619580) +> at /home/genes/work/ubuntu/qemu-kvm-1.0+noroms/hw/ivshmem.c:367 +> 367 for (j = 0; j < s->peers[i].nb_eventfds; j++) { +> (gdb) print s->peers +> $2 = (Peer *) 0x0 +> +> To manage notifications about this bug go to: +> https://bugs.launchpad.net/qemu/+bug/1314857/+subscriptions +> +> + + +Fix had been included here: +https://git.qemu.org/?p=qemu.git;a=commitdiff;h=e9d21c436f716603b3 + |