[PATCH] util: check for NULL parameter in virFileWrapperFdCatchError

[Ján Tomko <jtomko@xxxxxxxxxx>]

This reverts 8927c0e qemu: fix a crash when save file can't be opened
and allows virFileWrapperFdCatchError to be called with NULL instead.
---
 src/qemu/qemu_driver.c |    6 ++----
 src/util/virfile.c     |    2 +-
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index d58656a..7e29608 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -2908,8 +2908,7 @@ qemuDomainSaveMemory(struct qemud_driver *driver,
 
 cleanup:
     VIR_FORCE_CLOSE(fd);
-    if (wrapperFd)
-        virFileWrapperFdCatchError(wrapperFd);
+    virFileWrapperFdCatchError(wrapperFd);
     virFileWrapperFdFree(wrapperFd);
     VIR_FREE(xml);
 
@@ -3365,8 +3364,7 @@ doCoreDump(struct qemud_driver *driver,
 cleanup:
     VIR_FORCE_CLOSE(fd);
     if (ret != 0) {
-        if (wrapperFd)
-            virFileWrapperFdCatchError(wrapperFd);
+        virFileWrapperFdCatchError(wrapperFd);
         unlink(path);
     }
     virFileWrapperFdFree(wrapperFd);
diff --git a/src/util/virfile.c b/src/util/virfile.c
index 9593151..c79ef04 100644
--- a/src/util/virfile.c
+++ b/src/util/virfile.c
@@ -369,7 +369,7 @@ virFileWrapperFdClose(virFileWrapperFdPtr wfd)
 void
 virFileWrapperFdCatchError(virFileWrapperFdPtr wfd)
 {
-    if (wfd->err_msg)
+    if (wfd && wfd->err_msg)
         VIR_WARN("iohelper reports: %s", wfd->err_msg);
 }
 
-- 
1.7.8.6

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