Parser assumed extra was always present when root was specified.
Fixed by handling root and extra separately.

Signed-off-by: Filip Alac <filipalac@gmail.com>
---
 src/xenconfig/xen_xm.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/xenconfig/xen_xm.c b/src/xenconfig/xen_xm.c
index 8ef68bbc..4becb40b 100644
--- a/src/xenconfig/xen_xm.c
+++ b/src/xenconfig/xen_xm.c
@@ -91,10 +91,13 @@ xenParseXMOS(virConfPtr conf, virDomainDefPtr def)
         if (xenConfigGetString(conf, "root", &root, NULL) < 0)
             return -1;
 
-        if (root) {
+        if (root && extra) {
             if (virAsprintf(&def->os.cmdline, "root=%s %s", root, extra) < 0)
                 return -1;
-        } else {
+        } else if (root) {
+            if (virAsprintf(&def->os.cmdline, "root=%s", root) < 0)
+                return -1;
+        } else if (extra) {
             if (VIR_STRDUP(def->os.cmdline, extra) < 0)
                 return -1;
         }
-- 
2.17.0

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On 05/12/2018 09:45 AM, Filip Alac wrote:
> Parser assumed extra was always present when root was specified.
> Fixed by handling root and extra separately.
> 
> Signed-off-by: Filip Alac <filipalac@gmail.com>

Reviewed-by: Jim Fehlig <jfehlig@suse.com>

and pushed. Thanks!

Regards,
Jim

> ---
>   src/xenconfig/xen_xm.c | 7 +++++--
>   1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/src/xenconfig/xen_xm.c b/src/xenconfig/xen_xm.c
> index 8ef68bbc..4becb40b 100644
> --- a/src/xenconfig/xen_xm.c
> +++ b/src/xenconfig/xen_xm.c
> @@ -91,10 +91,13 @@ xenParseXMOS(virConfPtr conf, virDomainDefPtr def)
>           if (xenConfigGetString(conf, "root", &root, NULL) < 0)
>               return -1;
>   
> -        if (root) {
> +        if (root && extra) {
>               if (virAsprintf(&def->os.cmdline, "root=%s %s", root, extra) < 0)
>                   return -1;
> -        } else {
> +        } else if (root) {
> +            if (virAsprintf(&def->os.cmdline, "root=%s", root) < 0)
> +                return -1;
> +        } else if (extra) {
>               if (VIR_STRDUP(def->os.cmdline, extra) < 0)
>                   return -1;
>           }
> 

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On 05/12/2018 11:45 AM, Filip Alac wrote:
> Parser assumed extra was always present when root was specified.
> Fixed by handling root and extra separately.
> 
> Signed-off-by: Filip Alac <filipalac@gmail.com>
> ---
>  src/xenconfig/xen_xm.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/src/xenconfig/xen_xm.c b/src/xenconfig/xen_xm.c
> index 8ef68bbc..4becb40b 100644
> --- a/src/xenconfig/xen_xm.c
> +++ b/src/xenconfig/xen_xm.c
> @@ -91,10 +91,13 @@ xenParseXMOS(virConfPtr conf, virDomainDefPtr def)
>          if (xenConfigGetString(conf, "root", &root, NULL) < 0)
>              return -1;
>  
> -        if (root) {
> +        if (root && extra) {
>              if (virAsprintf(&def->os.cmdline, "root=%s %s", root, extra) < 0)
>                  return -1;
> -        } else {
> +        } else if (root) {
> +            if (virAsprintf(&def->os.cmdline, "root=%s", root) < 0)
> +                return -1;
> +        } else if (extra) {
>              if (VIR_STRDUP(def->os.cmdline, extra) < 0)
>                  return -1;
>          }
> 

I'm guessing you came to this issue via
https://bugzilla.redhat.com/show_bug.cgi?id=1327578 . In the future
please add a link to the bug report in the git commit message

Also this is a good candidate for extending the test suite,
tests/xmconfigdata and tests/xmconfigtest.c

Thanks,
Cole

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