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Fix crash changing CDROM media

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This change tried to fix a crash with changing CDROM media but
failed to actually do so

  commit d0172d2b1b5d865aaa042070d7c2d00effb2ff8c
  Author: Osier Yang <jyang@redhat.com>
  Date:   Tue Feb 19 20:27:45 2013 +0800

    qemu: Remove the shared disk entry if the operation is ejecting or updating

It was still accessing disk->src, when the entire 'disk' object
has been free'd already. Even if it weren't free'd, accessing
the 'src' value of virDomainDiskDef is not allowed without
first validating disk->type is file or block. Just remove the
broken code entirely.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrange 2013-02-25 17:22:14 +00:00
parent b6176e5226
commit 02b9097274
1 changed files with 4 additions and 3 deletions
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7
src/qemu/qemu_driver.c
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@ -5778,13 +5778,14 @@ qemuDomainAttachDeviceDiskLive(virConnectPtr conn,
dev->data.disk = tmp;
ret = qemuDomainChangeEjectableMedia(driver, vm, disk, orig_disk, false);
/* 'disk' must not be accessed now - it has been free'd.
* 'orig_disk' now points to the new disk, while 'dev_copy'
* now points to the old disk */
/* Need to remove the shared disk entry for the original disk src
* if the operation is either ejecting or updating.
*/
if (ret == 0 &&
orig_disk->src &&
STRNEQ_NULLABLE(orig_disk->src, disk->src))
if (ret == 0)
ignore_value(qemuRemoveSharedDisk(driver, dev_copy->data.disk,
vm->def->name));
break;