block: Save errno before error_setg_errno
error_setg_errno() may overwrite errno; therefore, its value should be
read before calling that function and not afterwards.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/block.c b/block.c
index 58efb5b..0e96a22 100644
--- a/block.c
+++ b/block.c
@@ -1084,8 +1084,8 @@
snprintf(backing_filename, sizeof(backing_filename),
"%s", filename);
} else if (!realpath(filename, backing_filename)) {
- error_setg_errno(errp, errno, "Could not resolve path '%s'", filename);
ret = -errno;
+ error_setg_errno(errp, errno, "Could not resolve path '%s'", filename);
goto fail;
}
