Subject: [alpine-aports] [PATCH] community/cpio: add minor security fixes, fix tests

From: alpine-mips-patches <[email-masked]>
Date: Thu, 20 Dec 2018 14:06:58 +0000

- add fixes for CVE-2016-2037, integer overflow and inconsistent
   argument passing to printf-like functions, all from upstream.
 - add autoconf to checkdepends as autom4te is required to create
   built-in tests from templates;
 - remove bash from checkdepends (as it is useless without passing
   CONFIG_SHELL=/bin/bash to ./configure anyway) and replace the
   bash-style sequence expression at tests/symlink-long.at:30 to
   resolve test failure;
 - disable NLS and make explicit other default ./configure options.

---
 community/cpio/APKBUILD                       |  30 +-
 community/cpio/CVE-2016-2037.patch            | 330 ++++++++++++++++++
 community/cpio/cast-arguments-to-printf.patch |  81 +++++
 .../cpio/fix-bash-sequence-expression.patch   |  11 +
 ...ned-integer-overflow-big-block-sizes.patch |  19 +
 5 files changed, 466 insertions(+), 5 deletions(-)
 create mode 100644 community/cpio/CVE-2016-2037.patch
 create mode 100644 community/cpio/cast-arguments-to-printf.patch
 create mode 100644 community/cpio/fix-bash-sequence-expression.patch
 create mode 100644 community/cpio/fix-signed-integer-overflow-big-block-sizes.patch

diff --git a/community/cpio/APKBUILD b/community/cpio/APKBUILD
index 64ad52497d..eb8840d660 100644
--- a/community/cpio/APKBUILD
+++ b/community/cpio/APKBUILD
@@ -2,24 +2,40 @@
 # Maintainer: Stuart Cardall <[email-masked]>
 pkgname=cpio
 pkgver=2.12
-pkgrel=2
+pkgrel=3
 pkgdesc="A tool to copy files into or out of a cpio or tar archive"
 url="https://www.gnu.org/software/cpio"
 arch="all"
 license="GPL"
 depends=""
-checkdepends="bash"
+checkdepends="autoconf"
 subpackages="$pkgname-doc"
-source="$pkgname-$pkgver.tar.bz2::http://ftp.snt.utwente.nl/pub/software/gnu/cpio/$pkgname-$pkgver.tar.bz2"
+source="$pkgname-$pkgver.tar.bz2::http://ftp.snt.utwente.nl/pub/software/gnu/cpio/$pkgname-$pkgver.tar.bz2
+	fix-bash-sequence-expression.patch
+	fix-signed-integer-overflow-big-block-sizes.patch
+	CVE-2016-2037.patch
+	cast-arguments-to-printf.patch"
+
+# secfixes:
+#   2.12-r3:
+#     - CVE-2016-2037
 
 builddir="$srcdir"/$pkgname-$pkgver
 
 build() {
 	cd "$builddir"
 	./configure \
+		--build=$CBUILD \
+		--host=$CHOST \
 		--prefix=/usr \
+		--sysconfdir=/etc \
+		--localstatedir=/var \
 		--mandir=/usr/share/man \
-		--infodir=/usr/share/info
+		--infodir=/usr/share/info \
+		--enable-largefile \
+		--disable-mt \
+		--disable-rpath \
+		--disable-nls
 	make
 }
 
@@ -36,4 +52,8 @@ package() {
 	rm "$pkgdir"/usr/share/man/*/rmt.*
 }
 
-sha512sums="0cd4da5f2fbca179ab4e666a5f878414c086a5f98bce4c76273f21d9b2a6fe422d901b5d453826c5f81bbe363aa015047a1e99779ad1a451c8feca6205c63120  cpio-2.12.tar.bz2"
+sha512sums="0cd4da5f2fbca179ab4e666a5f878414c086a5f98bce4c76273f21d9b2a6fe422d901b5d453826c5f81bbe363aa015047a1e99779ad1a451c8feca6205c63120  cpio-2.12.tar.bz2
+228ae9f3832589eea742534953e3d28eafe8295893232b33f060a4ad35d7da7eae4608e1d675d9ece1a8ff107157a3c9c43eb2d282b3a95b22324c27d54fd787  fix-bash-sequence-expression.patch
+979a67a0071389fd385c118062e8f3a89488c94c7b3674396f17311e891134ea328d948da4bfeb45bbc620c67e411717cd1cc1ff890d72db479bb484e8d1839c  fix-signed-integer-overflow-big-block-sizes.patch
+0c3884389be446a927e387ccf8a3e658b38e3d2b94bb3262703bbd6806835e7f5d1cccfbdf090ce7be27913eef6b67c30e37e7b9fee363a9d9ee6c4d830da4c1  CVE-2016-2037.patch
+209007a8c34f52a4a7539adf83b62925ea0013e11b0ec4c4faf6853384c34251e7898ed5822cb5a2f4a05d90baa574fc26f52504f2952e6e57c2b852a0d2d97a  cast-arguments-to-printf.patch"
diff --git a/community/cpio/CVE-2016-2037.patch b/community/cpio/CVE-2016-2037.patch
new file mode 100644
index 0000000000..dc7bbc0be5
--- /dev/null
+++ b/community/cpio/CVE-2016-2037.patch
@@ -0,0 +1,330 @@
+commit d36ec5f4e93130efb24fb9678aafd88e8070095b
+Author: Pavel Raiskup <[email-masked]>
+Date:   Tue Jan 26 23:17:54 2016 +0100
+
+    CVE-2016-2037 - 1 byte out-of-bounds write
+    
+    Ensure that cpio_safer_name_suffix always works with dynamically
+    allocated buffer, and that it has size of at least 32 bytes.
+    Then, any call to cpio_safer_name_suffix is safe (it requires at
+    least 2 bytes in the buffer).
+    
+    Also ensure that c_namesize is always correctly initialized (by
+    cpio_set_c_name) to avoid undefined behavior when reading
+    file_hdr.c_namesize (previously happened for tar archives).
+    
+    References:
+    http://www.mail-archive.com/[email-masked]/msg00545.html
+    
+    * src/copyin.c (query_rename): Drop the hack, as we now work with
+    dynamically allocated buffer.  Use cpio_set_c_name.
+    (create_defered_links_to_skipped): Use cpio_set_c_name rather than
+    manual assignment.
+    (read_name_from_file): New function to avoid C&P.
+    (read_in_old_ascii, read_in_new_ascii, read_in_binary): Use
+    read_name_from_file.
+    (process_copy_in): Initialize file_hdr.c_namesize.
+    * src/copyout.c (process_copy_out): Use cpio_set_c_name.
+    * src/cpiohdr.h (cpio_set_c_name): New prototype.
+    * src/tar.c (read_in_tar_header): Use cpio_set_c_name.
+    * src/util.c (cpio_set_c_name): New function to set
+    file_hdr->c_name and c_namesize from arbitrary string.
+    (cpio_safer_name_suffix): Some docs fixes.
+    * tests/inout.at: Also test copy-in, and try various formats.
+
+diff --git a/src/copyin.c b/src/copyin.c
+index 6a306ee..ba887ae 100644
+--- a/src/copyin.c
++++ b/src/copyin.c
+@@ -76,28 +76,7 @@ query_rename(struct cpio_file_stat* file_hdr, FILE *tty_in, FILE *tty_out,
+       return -1;
+     }
+   else
+-  /* Debian hack: file_hrd.c_name is sometimes set to
+-     point to static memory by code in tar.c.  This
+-     causes a segfault.  This has been fixed and an
+-     additional check to ensure that the file name
+-     is not too long has been added.  (Reported by
+-     Horst Knobloch.)  This bug has been reported to
+-     "[email-masked]". (99/1/6) -BEM */
+-    {
+-      if (archive_format != arf_tar && archive_format != arf_ustar)
+-	{
+-	  free (file_hdr->c_name);
+-	  file_hdr->c_name = xstrdup (new_name.ds_string);
+-	}
+-      else
+-	{
+-	  if (is_tar_filename_too_long (new_name.ds_string))
+-	    error (0, 0, _("%s: file name too long"),
+-		   new_name.ds_string);
+-	  else
+-	    strcpy (file_hdr->c_name, new_name.ds_string);
+-	}
+-    }
++    cpio_set_c_name (file_hdr, new_name.ds_string);
+   return 0;
+ }
+ 
+@@ -342,8 +321,7 @@ create_defered_links_to_skipped (struct cpio_file_stat *file_hdr,
+ 	    d_prev->next = d->next;
+ 	  else
+ 	    deferments = d->next;
+-	  free (file_hdr->c_name);
+-	  file_hdr->c_name = xstrdup(d->header.c_name);
++	  cpio_set_c_name (file_hdr, d->header.c_name);
+ 	  free_deferment (d);
+ 	  copyin_regular_file(file_hdr, in_file_des);
+ 	  return 0;
+@@ -1012,6 +990,22 @@ read_in_header (struct cpio_file_stat *file_hdr, int in_des)
+     }
+ }
+ 
++static void
++read_name_from_file (struct cpio_file_stat *file_hdr, int fd, uintmax_t len)
++{
++  static char *tmp_filename;
++  static size_t buflen;
++
++  if (buflen < len)
++    {
++      buflen = len;
++      tmp_filename = xrealloc (tmp_filename, buflen);
++    }
++
++  tape_buffered_read (tmp_filename, fd, len);
++  cpio_set_c_name (file_hdr, tmp_filename);
++}
++
+ /* Fill in FILE_HDR by reading an old-format ASCII format cpio header from
+    file descriptor IN_DES, except for the magic number, which is
+    already filled in.  */
+@@ -1038,14 +1032,8 @@ read_in_old_ascii (struct cpio_file_stat *file_hdr, int in_des)
+   file_hdr->c_rdev_min = minor (dev);
+ 
+   file_hdr->c_mtime = FROM_OCTAL (ascii_header.c_mtime);
+-  file_hdr->c_namesize = FROM_OCTAL (ascii_header.c_namesize);
+   file_hdr->c_filesize = FROM_OCTAL (ascii_header.c_filesize);
+-  
+-  /* Read file name from input.  */
+-  if (file_hdr->c_name != NULL)
+-    free (file_hdr->c_name);
+-  file_hdr->c_name = (char *) xmalloc (file_hdr->c_namesize + 1);
+-  tape_buffered_read (file_hdr->c_name, in_des, (long) file_hdr->c_namesize);
++  read_name_from_file (file_hdr, in_des, FROM_OCTAL (ascii_header.c_namesize));
+ 
+   /* HP/UX cpio creates archives that look just like ordinary archives,
+      but for devices it sets major = 0, minor = 1, and puts the
+@@ -1100,14 +1088,8 @@ read_in_new_ascii (struct cpio_file_stat *file_hdr, int in_des)
+   file_hdr->c_dev_min = FROM_HEX (ascii_header.c_dev_min);
+   file_hdr->c_rdev_maj = FROM_HEX (ascii_header.c_rdev_maj);
+   file_hdr->c_rdev_min = FROM_HEX (ascii_header.c_rdev_min);
+-  file_hdr->c_namesize = FROM_HEX (ascii_header.c_namesize);
+   file_hdr->c_chksum = FROM_HEX (ascii_header.c_chksum);
+-  
+-  /* Read file name from input.  */
+-  if (file_hdr->c_name != NULL)
+-    free (file_hdr->c_name);
+-  file_hdr->c_name = (char *) xmalloc (file_hdr->c_namesize);
+-  tape_buffered_read (file_hdr->c_name, in_des, (long) file_hdr->c_namesize);
++  read_name_from_file (file_hdr, in_des, FROM_HEX (ascii_header.c_namesize));
+ 
+   /* In SVR4 ASCII format, the amount of space allocated for the header
+      is rounded up to the next long-word, so we might need to drop
+@@ -1155,16 +1137,9 @@ read_in_binary (struct cpio_file_stat *file_hdr,
+   file_hdr->c_rdev_min = minor (short_hdr->c_rdev);
+   file_hdr->c_mtime = (unsigned long) short_hdr->c_mtimes[0] << 16
+                       | short_hdr->c_mtimes[1];
+-
+-  file_hdr->c_namesize = short_hdr->c_namesize;
+   file_hdr->c_filesize = (unsigned long) short_hdr->c_filesizes[0] << 16
+                       | short_hdr->c_filesizes[1];
+-
+-  /* Read file name from input.  */
+-  if (file_hdr->c_name != NULL)
+-    free (file_hdr->c_name);
+-  file_hdr->c_name = (char *) xmalloc (file_hdr->c_namesize);
+-  tape_buffered_read (file_hdr->c_name, in_des, (long) file_hdr->c_namesize);
++  read_name_from_file (file_hdr, in_des, short_hdr->c_namesize);
+ 
+   /* In binary mode, the amount of space allocated in the header for
+      the filename is `c_namesize' rounded up to the next short-word,
+@@ -1245,6 +1220,7 @@ process_copy_in ()
+       read_pattern_file ();
+     }
+   file_hdr.c_name = NULL;
++  file_hdr.c_namesize = 0;
+ 
+   if (rename_batch_file)
+     {
+diff --git a/src/copyout.c b/src/copyout.c
+index 87c1932..7532dac 100644
+--- a/src/copyout.c
++++ b/src/copyout.c
+@@ -660,8 +660,7 @@ process_copy_out ()
+ 	  cpio_safer_name_suffix (input_name.ds_string, false,
+ 				  !no_abs_paths_flag, true);
+ #ifndef HPUX_CDF
+-	  file_hdr.c_name = input_name.ds_string;
+-	  file_hdr.c_namesize = strlen (input_name.ds_string) + 1;
++	  cpio_set_c_name (&file_hdr, input_name.ds_string);
+ #else
+ 	  if ( (archive_format != arf_tar) && (archive_format != arf_ustar) )
+ 	    {
+@@ -670,16 +669,15 @@ process_copy_out ()
+ 		 properly recreate the directory as hidden (in case the
+ 		 files of a directory go into the archive before the
+ 		 directory itself (e.g from "find ... -depth ... | cpio")).  */
+-	      file_hdr.c_name = add_cdf_double_slashes (input_name.ds_string);
+-	      file_hdr.c_namesize = strlen (file_hdr.c_name) + 1;
++              cpio_set_c_name (&file_hdr,
++                               add_cdf_double_slashes (input_name.ds_string));
+ 	    }
+ 	  else
+ 	    {
+ 	      /* We don't mark CDF's in tar files.  We assume the "hidden"
+ 		 directory will always go into the archive before any of
+ 		 its files.  */
+-	      file_hdr.c_name = input_name.ds_string;
+-	      file_hdr.c_namesize = strlen (input_name.ds_string) + 1;
++              cpio_set_c_name (&file_hdr, input_name.ds_string);
+ 	    }
+ #endif
+ 
+@@ -866,8 +864,7 @@ process_copy_out ()
+   file_hdr.c_chksum = 0;
+ 
+   file_hdr.c_filesize = 0;
+-  file_hdr.c_namesize = 11;
+-  file_hdr.c_name = CPIO_TRAILER_NAME;
++  cpio_set_c_name (&file_hdr, CPIO_TRAILER_NAME);
+   if (archive_format != arf_tar && archive_format != arf_ustar)
+     write_out_header (&file_hdr, out_file_des);
+   else
+diff --git a/src/cpiohdr.h b/src/cpiohdr.h
+index c297415..588135b 100644
+--- a/src/cpiohdr.h
++++ b/src/cpiohdr.h
+@@ -129,5 +129,6 @@ struct cpio_file_stat /* Internal representation of a CPIO header */
+   char *c_tar_linkname;
+ };
+ 
++void cpio_set_c_name(struct cpio_file_stat *file_hdr, char *name);
+ 
+ #endif /* cpiohdr.h */
+diff --git a/src/tar.c b/src/tar.c
+index 1b1156e..0a34845 100644
+--- a/src/tar.c
++++ b/src/tar.c
+@@ -282,7 +282,7 @@ read_in_tar_header (struct cpio_file_stat *file_hdr, int in_des)
+       if (null_block ((long *) &tar_rec, TARRECORDSIZE))
+ #endif
+ 	{
+-	  file_hdr->c_name = CPIO_TRAILER_NAME;
++	  cpio_set_c_name (file_hdr, CPIO_TRAILER_NAME);
+ 	  return;
+ 	}
+ #if 0
+@@ -316,9 +316,11 @@ read_in_tar_header (struct cpio_file_stat *file_hdr, int in_des)
+ 	}
+ 
+       if (archive_format != arf_ustar)
+-	file_hdr->c_name = stash_tar_filename (NULL, tar_hdr->name);
++        cpio_set_c_name (file_hdr, stash_tar_filename (NULL, tar_hdr->name));
+       else
+-	file_hdr->c_name = stash_tar_filename (tar_hdr->prefix, tar_hdr->name);
++        cpio_set_c_name (file_hdr, stash_tar_filename (tar_hdr->prefix,
++                                                      tar_hdr->name));
++
+       file_hdr->c_nlink = 1;
+       file_hdr->c_mode = FROM_OCTAL (tar_hdr->mode);
+       file_hdr->c_mode = file_hdr->c_mode & 07777;
+@@ -398,7 +400,7 @@ read_in_tar_header (struct cpio_file_stat *file_hdr, int in_des)
+ 	case AREGTYPE:
+ 	  /* Old tar format; if the last char in filename is '/' then it is
+ 	     a directory, otherwise it's a regular file.  */
+-	  if (file_hdr->c_name[strlen (file_hdr->c_name) - 1] == '/')
++	  if (file_hdr->c_name[file_hdr->c_namesize - 1] == '/')
+ 	    file_hdr->c_mode |= CP_IFDIR;
+ 	  else
+ 	    file_hdr->c_mode |= CP_IFREG;
+diff --git a/src/util.c b/src/util.c
+index d78d576..10486dc 100644
+--- a/src/util.c
++++ b/src/util.c
+@@ -1409,8 +1409,34 @@ set_file_times (int fd,
+     utime_error (name);
+ }
+ 
++
++void
++cpio_set_c_name (struct cpio_file_stat *file_hdr, char *name)
++{
++  static size_t buflen = 0;
++  size_t len = strlen (name) + 1;
++
++  if (buflen == 0)
++    {
++      buflen = len;
++      if (buflen < 32)
++        buflen = 32;
++      file_hdr->c_name = xmalloc (buflen);
++    }
++  else if (buflen < len)
++    {
++      buflen = len;
++      file_hdr->c_name = xrealloc (file_hdr->c_name, buflen);
++    }
++
++  file_hdr->c_namesize = len;
++  memmove (file_hdr->c_name, name, len);
++}
++
+ /* Do we have to ignore absolute paths, and if so, does the filename
+-   have an absolute path?  */
++   have an absolute path?  Before calling this function make sure that the
++   allocated NAME buffer has capacity at least 2 bytes. */
++
+ void
+ cpio_safer_name_suffix (char *name, bool link_target, bool absolute_names,
+ 			bool strip_leading_dots)
+@@ -1425,6 +1451,10 @@ cpio_safer_name_suffix (char *name, bool link_target, bool absolute_names,
+ 	  ++p;
+       }
+   if (p != name)
++    /* The 'p' string is shortened version of 'name' with one exception;  when
++       the 'name' points to an empty string (buffer where name[0] == '\0') the
++       'p' then points to static string ".".  So caller needs to ensure there
++       are at least two bytes available in 'name' buffer so memmove succeeds. */
+     memmove (name, p, (size_t)(strlen (p) + 1));
+ }
+ 
+diff --git a/tests/inout.at b/tests/inout.at
+index 86c7d02..fd7baea 100644
+--- a/tests/inout.at
++++ b/tests/inout.at
+@@ -35,7 +35,22 @@ while read NAME LENGTH
+ do
+ 	genfile --length $LENGTH > $NAME
+ 	echo $NAME
+-done < filelist |
+- cpio --quiet -o > archive])
++done < filelist > filelist_raw
++
++for format in bin odc newc crc tar ustar hpbin hpodc
++do
++    cpio --format=$format --quiet -o < filelist_raw > archive.$format
++    rm -rf output
++    mkdir output && cd output
++    cpio -i --quiet < ../archive.$format
++
++    while read file
++    do
++        test -f $file || echo "$file not found"
++    done < ../filelist_raw
++
++    cd ..
++done
++])
+ 
+ AT_CLEANUP
diff --git a/community/cpio/cast-arguments-to-printf.patch b/community/cpio/cast-arguments-to-printf.patch
new file mode 100644
index 0000000000..f1eeabd757
--- /dev/null
+++ b/community/cpio/cast-arguments-to-printf.patch
@@ -0,0 +1,81 @@
+commit 3be097c12ec14a69b3f3df3e2138fa235a3154d7
+Author: Sergey Poznyakoff <[email-masked]>
+Date:   Sat Dec 1 12:01:21 2018 +0200
+
+    Minor fixes
+    
+    * src/copyin.c: Remove unused variable.
+    * src/util.c: Cast arguments to printf.
+
+diff --git a/src/copyin.c b/src/copyin.c
+index ba887ae..a01873d 100644
+--- a/src/copyin.c
++++ b/src/copyin.c
+@@ -844,14 +844,14 @@ from_ascii (char const *where, size_t digs, unsigned logbase)
+       char *p = strchr (codetab, toupper (*buf));
+       if (!p)
+ 	{
+-	  error (0, 0, _("Malformed number %.*s"), digs, where);
++	  error (0, 0, _("Malformed number %.*s"), (int) digs, where);
+ 	  break;
+ 	}
+       
+       d = p - codetab;
+       if ((d >> logbase) > 1)
+ 	{
+-	  error (0, 0, _("Malformed number %.*s"), digs, where);
++	  error (0, 0, _("Malformed number %.*s"), (int) digs, where);
+ 	  break;
+ 	}
+       value += d;
+@@ -862,7 +862,7 @@ from_ascii (char const *where, size_t digs, unsigned logbase)
+     }
+   if (overflow)
+     error (0, 0, _("Archive value %.*s is out of range"),
+-	   digs, where);
++	   (int) digs, where);
+   return value;
+ }
+ 
+diff --git a/src/util.c b/src/util.c
+index 4e49124..7303240 100644
+--- a/src/util.c
++++ b/src/util.c
+@@ -498,8 +498,9 @@ copy_files_disk_to_tape (int in_des, int out_des, off_t num_bytes,
+ 			 filename,  STRINGIFY_BIGINT (num_bytes, buf));
+ 	      }
+ 	    else
+-	      error (0, 0, _("Read error at byte %lld in file %s, padding with zeros"),
+-			original_num_bytes - num_bytes, filename);
++	      error (0, 0,
++		     _("Read error at byte %lld in file %s, padding with zeros"),
++		     (long long) (original_num_bytes - num_bytes), filename);
+ 	    write_nuls_to_file (num_bytes, out_des, tape_buffered_write);
+ 	    break;
+ 	  }
+@@ -548,8 +549,9 @@ copy_files_disk_to_disk (int in_des, int out_des, off_t num_bytes,
+ 		       filename,  STRINGIFY_BIGINT (num_bytes, buf));
+ 	      }
+ 	    else
+-	      error (0, 0, _("Read error at byte %lld in file %s, padding with zeros"),
+-			original_num_bytes - num_bytes, filename);
++	      error (0, 0,
++		     _("Read error at byte %lld in file %s, padding with zeros"),
++		     (long long) (original_num_bytes - num_bytes), filename);
+ 	    write_nuls_to_file (num_bytes, out_des, disk_buffered_write);
+ 	    break;
+ 	  }
+@@ -599,13 +601,11 @@ void
+ create_all_directories (char *name)
+ {
+   char *dir;
+-  int   mode;
+ #ifdef HPUX_CDF
+   int   cdf;
+ #endif
+ 
+   dir = dir_name (name);
+-  mode = 0700;
+ #ifdef HPUX_CDF
+   cdf = islastparentcdf (name);
+   if (cdf)
diff --git a/community/cpio/fix-bash-sequence-expression.patch b/community/cpio/fix-bash-sequence-expression.patch
new file mode 100644
index 0000000000..a2eab0f261
--- /dev/null
+++ b/community/cpio/fix-bash-sequence-expression.patch
@@ -0,0 +1,11 @@
+--- a/tests/symlink-long.at
++++ b/tests/symlink-long.at
+@@ -27,7 +27,7 @@
+ 
+ # len(dirname) > READBUFSIZE
+ dirname=
+-for i in {1..52}; do
++for i in $(seq -s \  52); do
+     dirname="xxxxxxxxx/$dirname"
+     mkdir "$dirname"
+ done
diff --git a/community/cpio/fix-signed-integer-overflow-big-block-sizes.patch b/community/cpio/fix-signed-integer-overflow-big-block-sizes.patch
new file mode 100644
index 0000000000..da2691ed87
--- /dev/null
+++ b/community/cpio/fix-signed-integer-overflow-big-block-sizes.patch
@@ -0,0 +1,19 @@
+commit 404600ebb4d417238bfabf7ec1561a62dc83c168
+Author: grajagandev <[email-masked]>
+Date:   Mon Feb 8 07:58:45 2016 -0800
+
+    Fix signed integer overflow - big block sizes
+
+diff --git a/src/main.c b/src/main.c
+index a13861f..5a30a7b 100644
+--- a/src/main.c
++++ b/src/main.c
+@@ -321,7 +321,7 @@ parse_opt (int key, char *arg, struct argp_state *state)
+ 
+     case BLOCK_SIZE_OPTION:		/* --block-size */
+       io_block_size = atoi (arg);
+-      if (io_block_size < 1)
++      if (io_block_size < 1 || io_block_size > INT_MAX/512)
+ 	USAGE_ERROR ((0, 0, _("invalid block size")));
+       io_block_size *= 512;
+       break;
-- 
2.20.1

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