haraldwolff/qemu-patch-raspberry4
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virtio-9p-device: Avoid freeing uninitialized memory

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In virtio_9p_device_init() there are 6x goto out that will lead to
v9fs_path_free() attempting to free unitialized path.data field.
Easiest way to trigger is: qemu-system-x86_64 -device virtio-9p-pci

Fix this by moving v9fs_path_init() before any goto out.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Message-id: 1375315187-16534-1-git-send-email-afaerber@suse.de
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Andreas Färber 2013-08-01 01:59:47 +02:00 committed by Anthony Liguori
parent d5a2bcf70e
commit 27915efb97
1 changed files with 2 additions and 1 deletions
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3
hw/9pfs/virtio-9p-device.c
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@ -61,6 +61,8 @@ static int virtio_9p_device_init(VirtIODevice *vdev)
s->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output);
v9fs_path_init(&path);
fse = get_fsdev_fsentry(s->fsconf.fsdev_id);
if (!fse) {
@ -111,7 +113,6 @@ static int virtio_9p_device_init(VirtIODevice *vdev)
* call back to do that. Since we are in the init path, we don't
* use co-routines here.
*/
v9fs_path_init(&path);
if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) {
fprintf(stderr,
"error in converting name to path %s", strerror(errno));