[glibc/google/grte/v5-2.27/master] Don't crash if /var/tmp doesn't exist

[Shu-Chun Weng <scw@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=658b6ff7f04a0eae832c0b35adba889307ad924a

commit 658b6ff7f04a0eae832c0b35adba889307ad924a
Author: Shu-Chun Weng <scw@google.com>
Date:   Mon May 3 16:47:10 2021 -0700

    Don't crash if /var/tmp doesn't exist
    
    `xstat` is checked `stat64` crashing the program if the latter returns
    failure. In this loop, we are trying to find one folder that satisfies
    the condition, no reason to crash the program if one folder doesn't.

Diff:
---
 io/tst-copy_file_range.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/io/tst-copy_file_range.c b/io/tst-copy_file_range.c
index 3d531a1937..38763328d3 100644
--- a/io/tst-copy_file_range.c
+++ b/io/tst-copy_file_range.c
@@ -759,8 +759,7 @@ do_test (void)
           }
 
         struct stat64 cstat;
-        xstat (path, &cstat);
-        if (cstat.st_dev == instat.st_dev)
+        if (stat (path, &cstat) != 0 || cstat.st_dev == instat.st_dev)
           {
             free (to_free);
             continue;