[PATCH 1/1] domain_validate.c: fix virDomainDefFSValidate() when fs->dst is NULL

[Daniel Henrique Barboza]

Commit 56dcdec1ac81 ("conf: reject duplicate virtiofs tags") added
validation code to reject duplicated virtiofs tags. But the <target>
element is not always present, meaning that fs->dst can be NULL at that
point.

If there is no "<target>" tag then the validation will fail in
virHashAddEntry() because fs->dst will be NULL. This is tested in
qemuxml2xml vhost-user-fs-sock, which is since then not passing:

1020) QEMU XML-2-XML-inactive vhost-user-fs-sock  ... Expected result code=0 but received code=1
FAILED
1021) QEMU XML-2-XML-active vhost-user-fs-sock  ... Expected result code=0 but received code=1
FAILED

The '<target>' tag is not mandatory, so let's consider that fs->dst
being NULL is a feasible scenario an adapt virDomainDefFSValidate()
accordingly.

Signed-off-by: Daniel Henrique Barboza <danielhb413 at gmail.com>
---
 src/conf/domain_validate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/conf/domain_validate.c b/src/conf/domain_validate.c
index 9422b00964..cf8b43b845 100644
--- a/src/conf/domain_validate.c
+++ b/src/conf/domain_validate.c
@@ -1504,7 +1504,7 @@ virDomainDefFSValidate(const virDomainDef *def)
     for (i = 0; i < def->nfss; i++) {
         const virDomainFSDef *fs = def->fss[i];
 
-        if (fs->fsdriver != VIR_DOMAIN_FS_DRIVER_TYPE_VIRTIOFS)
+        if (fs->fsdriver != VIR_DOMAIN_FS_DRIVER_TYPE_VIRTIOFS || !fs->dst)
             continue;
 
         if (virHashHasEntry(dsts, fs->dst)) {
-- 
2.31.1