[glibc/release/2.34/master] copy_and_spawn_sgid: Avoid double calls to close()

[Siddhesh Poyarekar <siddhesh@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=7ff4da3dc26de351a5abe7c2905038cbe55c8041

commit 7ff4da3dc26de351a5abe7c2905038cbe55c8041
Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date:   Tue Aug 3 21:10:53 2021 +0530

    copy_and_spawn_sgid: Avoid double calls to close()
    
    If close() on infd and outfd succeeded, reset the fd numbers so that
    we don't attempt to close them again.
    
    Reviewed-by: Arjun Shankar <arjun@redhat.com>
    (cherry picked from commit 45caed9d67a00af917d8b5b88d4b5eb1225b7aef)

Diff:
---
 support/support_capture_subprocess.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/support/support_capture_subprocess.c b/support/support_capture_subprocess.c
index 27bfd19c93..0bacf6dbc2 100644
--- a/support/support_capture_subprocess.c
+++ b/support/support_capture_subprocess.c
@@ -170,6 +170,7 @@ copy_and_spawn_sgid (char *child_id, gid_t gid)
      support_subprogram because we only want the program exit status, not the
      contents.  */
   ret = 0;
+  infd = outfd = -1;
 
   char * const args[] = {execname, child_id, NULL};