Commit c4fca5bb4fcf8509cb93db6e20314f22994c093b
2021-02-07T14:22:21
closefrom: Handle lowfd < 0 properly More important if close_range() is going to be used, since casting negative values to 'unsigned int' might hide the errors. [guillem@hadrons.org: Minor coding style fix. ] Signed-off-by: Guillem Jover <guillem@hadrons.org>
diff --git a/src/closefrom.c b/src/closefrom.c
index be38813..e2e10a8 100644
--- a/src/closefrom.c
+++ b/src/closefrom.c
@@ -179,6 +179,9 @@ closefrom_procfs(int lowfd)
void
closefrom(int lowfd)
{
+ if (lowfd < 0)
+ lowfd = 0;
+
/* Try the fast method first, if possible. */
#if defined(HAVE_FCNTL_CLOSEM)
if (fcntl(lowfd, F_CLOSEM, 0) != -1)