1 files changed, 47 insertions, 0 deletions
diff --git a/tests/t4302-nilfs2-lessbadsb2.sh b/tests/t4302-nilfs2-lessbadsb2.sh
new file mode 100755
index 0000000..1857b29
--- /dev/null
+++ b/tests/t4302-nilfs2-lessbadsb2.sh
@@ -0,0 +1,47 @@
+#!/bin/sh
+# Trigger a nilfs2-related bug.
+
+# Copyright (C) 2011-2014, 2019-2023 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# This test is like t4301-nilfsbadsb2 except with an s_bytes field of
+# 1024 instead of 10. This exercises a less obvious bug.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../parted
+ss=$sector_size_
+len=32
+dev=dev-file
+
+dd if=/dev/zero of=$dev bs=512 count=$(($len+$ss/512)) || framework_failure_
+
+end=$(($len * 512 / $ss))
+parted -s $dev mklabel msdos mkpart primary 1s ${end}s || framework_failure_
+
+# Write a secondary superblock with the nilfs magic number and a nilfs
+# superblock length (s_bytes) field of only 10 bytes.
+# struct nilfs2_super_block starts with these four fields...
+#	uint32_t	s_rev_level;
+#	uint16_t	s_minor_rev_level;
+#	uint16_t	s_magic;
+#	uint16_t	s_bytes;
+sb2_offset=$(( 24 / ($ss / 512) + 1))
+perl -e "print pack 'LSSS.', 0, 0, 0x3434, 1024, $ss" |
+    dd of=$dev bs=$ss seek=$sb2_offset count=1 conv=notrunc
+
+# This used to read past the part of the stack allocated by alloca, but
+# may or may not cause a segmentation fault as a result.
+parted -s $dev print || fail=1
+
+Exit $fail