[glibc] ldbl-128ibm-compat: set PRINTF_CHK flag in {,v}sprintf_chk

[glibc] ldbl-128ibm-compat: set PRINTF_CHK flag in {,v}sprintf_chk

[Paul E.Murphy]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=cd7965bd970b0a298e734acc9dafae0a5db5f712

commit cd7965bd970b0a298e734acc9dafae0a5db5f712
Author: Paul E. Murphy <murphyp@linux.vnet.ibm.com>
Date:   Tue Feb 4 09:21:19 2020 -0600

    ldbl-128ibm-compat: set PRINTF_CHK flag in {,v}sprintf_chk
    
    This should be unconditionally set to match the common implementation,
    and fixes multiple test failures related to sprintf.
    
    Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>

Diff:
---
 sysdeps/ieee754/ldbl-128ibm-compat/ieee128-sprintf_chk.c  | 4 ++++
 sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsprintf_chk.c | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-sprintf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-sprintf_chk.c
index 207c1c6..f52e17f 100644
--- a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-sprintf_chk.c
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-sprintf_chk.c
@@ -30,6 +30,10 @@ ___ieee128_sprintf_chk (char *s, int flag, size_t slen,
   if (flag > 0)
     mode |= PRINTF_FORTIFY;
 
+  /* Regardless of the value of flag, let __vsprintf_internal know that
+     this is a call from *printf_chk.  */
+  mode |= PRINTF_CHK;
+
   if (slen == 0)
     __chk_fail ();
 
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsprintf_chk.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsprintf_chk.c
index 2c32735..c6130b4 100644
--- a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsprintf_chk.c
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsprintf_chk.c
@@ -26,6 +26,10 @@ ___ieee128_vsprintf_chk (char *string, int flag, size_t slen,
   if (flag > 0)
     mode |= PRINTF_FORTIFY;
 
+  /* Regardless of the value of flag, let __vsprintf_internal know that
+     this is a call from *printf_chk.  */
+  mode |= PRINTF_CHK;
+
   if (slen == 0)
     __chk_fail ();