From 2aefb506e491e0ddf1abb6a7cbb2c4137e01e47e Mon Sep 17 00:00:00 2001 From: chenyuhui Date: Mon, 1 Aug 2022 19:32:29 +0800 Subject: [PATCH 21/22] virNetDevSaveNetConfig: Pass mode to virFileWriteStr() For some types of SRIOV interfaces we create a temporary file where the state of the interface is saved before we start modifying it. The file is used then to restore the original configuration when the interface is no longer associated with any guest. For writing the file virFileWriteStr() is used. However, it's given wrong argument: the last argument is supposed to be mode to create the file with but virNetDevSaveNetConfig() passes open(2) flags (O_CREAT|O_TRUNC|O_WRONLY). We need the file to be writable and readable by root only (0600). Therefore, pass that mode instead of gibberish. Signed-off-by: Michal Privoznik Reviewed-by: Peter Krempa --- src/util/virnetdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/util/virnetdev.c b/src/util/virnetdev.c index 950844b110..518eaea820 100644 --- a/src/util/virnetdev.c +++ b/src/util/virnetdev.c @@ -1916,7 +1916,7 @@ virNetDevSaveNetConfig(const char *linkdev, int vf, if (!(fileStr = virJSONValueToString(configJSON, true))) goto cleanup; - if (virFileWriteStr(filePath, fileStr, O_CREAT|O_TRUNC|O_WRONLY) < 0) { + if (virFileWriteStr(filePath, fileStr, 0600) < 0) { /* 0600: writable and readable by root */ virReportSystemError(errno, _("Unable to preserve mac/vlan tag " "for device = %s, vf = %d"), linkdev, vf); goto cleanup; -- 2.33.0