unexpand: fix stack overflow with large tabsizes

Resolves: RHEL-152110

coreutils-i18n.patch

@@ -33,8 +33,8 @@ Subject: [PATCH] coreutils-i18n.patch
  tests/pr/pr-tests.pl        |  49 +++
  tests/sort/sort-merge.pl    |  42 ++
  tests/sort/sort.pl          |  40 +-
- tests/unexpand/mb.sh        | 173 ++++++++
- 30 files changed, 3600 insertions(+), 196 deletions(-)
+ tests/unexpand/mb.sh        | 179 ++++++++
+ 30 files changed, 3606 insertions(+), 196 deletions(-)
  create mode 100644 lib/mbchar.c
  create mode 100644 lib/mbchar.h
  create mode 100644 lib/mbfile.c
@@ -4082,7 +4082,7 @@ index 09634197..dea94575 100644
            break;
  
 diff --git a/src/unexpand.c b/src/unexpand.c
-index aca67dd7..f79c8088 100644
+index aca67dd7..dacded6d 100644
 --- a/src/unexpand.c
 +++ b/src/unexpand.c
 @@ -39,6 +39,9 @@
@@ -4131,7 +4131,7 @@ index aca67dd7..f79c8088 100644
       tab stop, then MAX_COLUMN_WIDTH - 1 blanks, then a non-blank; so
       allocate MAX_COLUMN_WIDTH bytes to store the blanks.  */
 -  pending_blank = xmalloc (max_column_width);
-+  pending_blank = xmalloc (max_column_width * sizeof (mbf_char_t));
++  pending_blank = xinmalloc (max_column_width, sizeof (mbf_char_t));
 +
 +  if (found_bom == true)
 +  {
@@ -5000,10 +5000,10 @@ index d49f65f6..ebba9255 100755
  my $verbose = $ENV{VERBOSE};
 diff --git a/tests/unexpand/mb.sh b/tests/unexpand/mb.sh
 new file mode 100644
-index 00000000..f64542eb
+index 00000000..89cac17b
 --- /dev/null
 +++ b/tests/unexpand/mb.sh
-@@ -0,0 +1,173 @@
+@@ -0,0 +1,179 @@
 +#!/bin/sh
 +
 +# Copyright (C) 2012-2015 Free Software Foundation, Inc.
@@ -5023,6 +5023,7 @@ index 00000000..f64542eb
 +
 +. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
 +print_ver_ unexpand
++getlimits_
 +
 +export LC_ALL=en_US.UTF-8
 +
@@ -5176,6 +5177,11 @@ index 00000000..f64542eb
 +LC_ALL=C unexpand -a in in > out || fail=1
 +compare exp out > /dev/null 2>&1 || fail=1
 +
++for mb_mul in 4 6; do
++  printf '   \n' | unexpand -t $(expr $SIZE_MAX / $mb_mul + 1) 2>err; ret=$?
++  test "$ret" = 1 || test "$ret" = 0 || { cat err; fail=1; }
++done
++
 +Exit $fail
 -- 
 2.54.0