From: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date: Wed, 30 Dec 2020 23:40:14 +0000 (+0000)
Subject: elf: Fix a DTV setup issue [BZ #27136]
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f774573828499855b342793fca5cbad8c6814190;p=thirdparty%2Fglibc.git

elf: Fix a DTV setup issue [BZ #27136]

The max modid is a valid index in the dtv, it should not be skipped.

The bug is observable if the last module has modid == 64 and its
generation is same or less than the max generation of the previous
modules.  Then dtv[0].counter implies dtv[64] is initialized but
it isn't. Fixes bug 27136.
---

diff --git a/elf/dl-tls.c b/elf/dl-tls.c
index dd76829e741..79b93ad91bd 100644
--- a/elf/dl-tls.c
+++ b/elf/dl-tls.c
@@ -590,7 +590,7 @@ _dl_allocate_tls_init (void *result)
 	}
 
       total += cnt;
-      if (total >= GL(dl_tls_max_dtv_idx))
+      if (total > GL(dl_tls_max_dtv_idx))
 	break;
 
       listp = listp->next;