11:26 p.m.
It will not work. This breaks qemu capabilities probing as a user.
---
src/qemu/qemu_capabilities.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 7ed5f94803..81ef0357e7 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -4524,7 +4524,8 @@ virQEMUCapsInitQMPCommandRun(virQEMUCapsInitQMPCommandPtr cmd,
#if WITH_CAPNG
/* QEMU might run into permission issues, e.g. /dev/sev (0600), override
* them just for the purpose of probing */
- virCommandAllowCap(cmd->cmd, CAP_DAC_OVERRIDE);
+ if (geteuid() == 0)
+ virCommandAllowCap(cmd->cmd, CAP_DAC_OVERRIDE);
#endif
virCommandSetGID(cmd->cmd, cmd->runGid);
--
2.20.1
11:32 p.m.
On Mon, Feb 04, 2019 at 16:26:02 +0100, Peter Krempa wrote:
It will not work. This breaks qemu capabilities probing as a user.
---
src/qemu/qemu_capabilities.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 7ed5f94803..81ef0357e7 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -4524,7 +4524,8 @@ virQEMUCapsInitQMPCommandRun(virQEMUCapsInitQMPCommandPtr cmd,
#if WITH_CAPNG
/* QEMU might run into permission issues, e.g. /dev/sev (0600), override
* them just for the purpose of probing */
- virCommandAllowCap(cmd->cmd, CAP_DAC_OVERRIDE);
+ if (geteuid() == 0)
Possibly replacing this with driver->privileged for the qemu driver but
that is not easily accessible.
+ virCommandAllowCap(cmd->cmd, CAP_DAC_OVERRIDE);
#endif
virCommandSetGID(cmd->cmd, cmd->runGid);
--
2.20.1
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11:44 p.m.
On Mon, Feb 04, 2019 at 04:32:52PM +0100, Peter Krempa wrote:
On Mon, Feb 04, 2019 at 16:26:02 +0100, Peter Krempa wrote:
> It will not work. This breaks qemu capabilities probing as a user.
> ---
> src/qemu/qemu_capabilities.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
> index 7ed5f94803..81ef0357e7 100644
> --- a/src/qemu/qemu_capabilities.c
> +++ b/src/qemu/qemu_capabilities.c
> @@ -4524,7 +4524,8 @@ virQEMUCapsInitQMPCommandRun(virQEMUCapsInitQMPCommandPtr
cmd,
> #if WITH_CAPNG
> /* QEMU might run into permission issues, e.g. /dev/sev (0600), override
> * them just for the purpose of probing */
> - virCommandAllowCap(cmd->cmd, CAP_DAC_OVERRIDE);
> + if (geteuid() == 0)
Possibly replacing this with driver->privileged for the qemu driver but
that is not easily accessible.
It doesn't really matter as privileged == (geteuid() == 0) since we purged
the hack for Solaris that tried to run privileged libvirtd as non-root for
Xen. We've got many other cases using geteuid() == 0 where they cannot
access the 'privileged' flag alrady.
Regards,
Daniel
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11:55 p.m.
On Mon, Feb 04, 2019 at 04:26:02PM +0100, Peter Krempa wrote:
It will not work. This breaks qemu capabilities probing as a user.
---
src/qemu/qemu_capabilities.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 7ed5f94803..81ef0357e7 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -4524,7 +4524,8 @@ virQEMUCapsInitQMPCommandRun(virQEMUCapsInitQMPCommandPtr cmd,
#if WITH_CAPNG
/* QEMU might run into permission issues, e.g. /dev/sev (0600), override
* them just for the purpose of probing */
- virCommandAllowCap(cmd->cmd, CAP_DAC_OVERRIDE);
+ if (geteuid() == 0)
+ virCommandAllowCap(cmd->cmd, CAP_DAC_OVERRIDE);
This should be enough of a fix with the current code base as it won't clash with
the other two CAP_SYS_RAWIO and CAP_NET_ADMIN which should still fail when used
with the session daemon as expected.
Reviewed-by: Erik Skultety <eskultet(a)redhat.com>
2099
days inactive
2099
days old
3 comments
3 participants
participants (3)
-
Daniel P. Berrangé -
Erik Skultety -
Peter Krempa