Fix division by denominator with more than two limbs in strtold

3 files changed, 10 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index 58f582c4e3..024ee2340b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2011-12-21  Andreas Schwab  <schwab@linux-m68k.org>
+
+	[BZ #13524]
+	* stdlib/strtod_l.c (____STRTOF_INTERNAL): Clear lowest limb of
+	numerator after shifting it by one limb.
+
 2011-12-19  Rafael Ávila de Espíndola  <rafael.espindola@gmail.com>
 
 	* sysdeps/x86_64/fpu/bits/fenv.h (feraiseexcept): Define it only
diff --git a/NEWS b/NEWS
index a0869ef08a..50c5852a67 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,4 @@
-GNU C Library NEWS -- history of user-visible changes.  2011-12-17
+GNU C Library NEWS -- history of user-visible changes.  2011-12-21
 Copyright (C) 1992-2009, 2010, 2011 Free Software Foundation, Inc.
 See the end for copying conditions.
 
@@ -13,7 +13,7 @@ Version 2.15
   12885, 12892, 12907, 12922, 12935, 13007, 13021, 13067, 13068, 13090,
   13092, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13179, 13192,
   13268, 13276, 13291, 13335, 13337, 13344, 13358, 13367, 13446, 13472,
-  13484, 13506
+  13484, 13506, 13524
 
 * New program pldd to list loaded object of a process
   Implemented by Ulrich Drepper.
diff --git a/stdlib/strtod_l.c b/stdlib/strtod_l.c
index b3380fdba3..f24d4de73b 100644
--- a/stdlib/strtod_l.c
+++ b/stdlib/strtod_l.c
@@ -1513,6 +1513,7 @@ ____STRTOF_INTERNAL (nptr, endptr, group, loc)
 	      assert (numsize == densize);
 	      for (i = numsize; i > 0; --i)
 		num[i] = num[i - 1];
+	      num[0] = 0;
 	    }
 
 	  den[densize] = 0;
@@ -1557,6 +1558,7 @@ ____STRTOF_INTERNAL (nptr, endptr, group, loc)
 	      n0 = num[densize] = num[densize - 1];
 	      for (i = densize - 1; i > 0; --i)
 		num[i] = num[i - 1];
+	      num[0] = 0;
 
 	      got_limb;
 	    }