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security, apparmor: add (Set|Restore)InputLabel

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d8116b5a "security: Introduce functions for input device hot(un)plug"
implemented the code (Set|Restore)InputLabel for several security modules,
this patch adds an AppArmor implementation for it as well.

That fixes hot-plugging event input devices by generating a rule for the
path that needs to be accessed.

Example hot adding:
  <input type='passthrough' bus='virtio'>
     <source evdev='/dev/input/event0' />
  </input>
Creates now:
  "/dev/input/event0" rwk,

Fixes: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1755153

Acked-by: Jamie Strandboge <jamie@canonical.com>
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
This commit is contained in:
Christian Ehrhardt 2018-03-19 14:48:39 +01:00
parent 999998a792
commit 943c1fd9b6
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GPG Key ID: BA3E29338280B242
1 changed files with 48 additions and 0 deletions
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48
src/security/security_apparmor.c
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@ -759,6 +759,51 @@ AppArmorRestoreMemoryLabel(virSecurityManagerPtr mgr,
return reload_profile(mgr, def, NULL, false);
}
/* Called when hotplugging */
static int
AppArmorSetInputLabel(virSecurityManagerPtr mgr,
virDomainDefPtr def,
virDomainInputDefPtr input)
{
if (input == NULL)
return 0;
switch ((virDomainInputType) input->type) {
case VIR_DOMAIN_INPUT_TYPE_PASSTHROUGH:
if (input->source.evdev == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("%s: passthrough input device has no source"),
__func__);
return -1;
}
if (!virFileExists(input->source.evdev)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("%s: \'%s\' does not exist"),
__func__, input->source.evdev);
return -1;
}
return reload_profile(mgr, def, input->source.evdev, true);
break;
case VIR_DOMAIN_INPUT_TYPE_MOUSE:
case VIR_DOMAIN_INPUT_TYPE_TABLET:
case VIR_DOMAIN_INPUT_TYPE_KBD:
case VIR_DOMAIN_INPUT_TYPE_LAST:
break;
}
return 0;
}
static int
AppArmorRestoreInputLabel(virSecurityManagerPtr mgr,
virDomainDefPtr def,
virDomainInputDefPtr input ATTRIBUTE_UNUSED)
{
return reload_profile(mgr, def, NULL, false);
}
/* Called when hotplugging */
static int
AppArmorSetSecurityImageLabel(virSecurityManagerPtr mgr,
@ -1161,6 +1206,9 @@ virSecurityDriver virAppArmorSecurityDriver = {
.domainSetSecurityMemoryLabel = AppArmorSetMemoryLabel,
.domainRestoreSecurityMemoryLabel = AppArmorRestoreMemoryLabel,
.domainSetSecurityInputLabel = AppArmorSetInputLabel,
.domainRestoreSecurityInputLabel = AppArmorRestoreInputLabel,
.domainSetSecurityDaemonSocketLabel = AppArmorSetSecurityDaemonSocketLabel,
.domainSetSecuritySocketLabel = AppArmorSetSecuritySocketLabel,
.domainClearSecuritySocketLabel = AppArmorClearSecuritySocketLabel,