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util: storage: Fix possible crash when source path is NULL

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Some storage protocols allow to have the @path field in struct
virStorageSource set to NULL. Add NULLSTR() wrappers to handle this
possibility until I finish the storage source error formatter.
This commit is contained in:
Peter Krempa 2015-04-21 17:35:23 +02:00
parent 64a9d2fa2f
commit 62a61d583c
1 changed files with 5 additions and 4 deletions
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9
src/util/virstoragefile.c
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@ -1391,20 +1391,21 @@ virStorageFileChainLookup(virStorageSourcePtr chain,
if (idx) { if (idx) {
virReportError(VIR_ERR_INVALID_ARG, virReportError(VIR_ERR_INVALID_ARG,
_("could not find backing store %u in chain for '%s'"), _("could not find backing store %u in chain for '%s'"),
idx, start); idx, NULLSTR(start));
} else if (name) { } else if (name) {
if (startFrom) if (startFrom)
virReportError(VIR_ERR_INVALID_ARG, virReportError(VIR_ERR_INVALID_ARG,
_("could not find image '%s' beneath '%s' in " _("could not find image '%s' beneath '%s' in "
"chain for '%s'"), name, startFrom->path, start); "chain for '%s'"), name, NULLSTR(startFrom->path),
NULLSTR(start));
else else
virReportError(VIR_ERR_INVALID_ARG, virReportError(VIR_ERR_INVALID_ARG,
_("could not find image '%s' in chain for '%s'"), _("could not find image '%s' in chain for '%s'"),
name, start); name, NULLSTR(start));
} else { } else {
virReportError(VIR_ERR_INVALID_ARG, virReportError(VIR_ERR_INVALID_ARG,
_("could not find base image in chain for '%s'"), _("could not find base image in chain for '%s'"),
start); NULLSTR(start));
} }
*parent = NULL; *parent = NULL;
return NULL; return NULL;