diff --git a/lib/ext2fs/alloc.c b/lib/ext2fs/alloc.c
index 0acbc4e6..2061b9d3 100644
--- a/lib/ext2fs/alloc.c
+++ b/lib/ext2fs/alloc.c
@@ -257,8 +257,11 @@ errcode_t ext2fs_get_free_blocks2(ext2_filsys fs, blk64_t start, blk64_t finish,
 	b &= ~(c_ratio - 1);
 	finish &= ~(c_ratio -1);
 	do {
-		if (b+num-1 > ext2fs_blocks_count(fs->super))
+		if (b + num - 1 >= ext2fs_blocks_count(fs->super)) {
+			if (finish > start)
+				return EXT2_ET_BLOCK_ALLOC_FAIL;
 			b = fs->super->s_first_data_block;
+		}
 		if (ext2fs_fast_test_block_bitmap_range2(map, b, num)) {
 			*ret = b;
 			return 0;
diff --git a/tests/f_boundscheck/expect.1 b/tests/f_boundscheck/expect.1
new file mode 100644
index 00000000..c2170b8f
--- /dev/null
+++ b/tests/f_boundscheck/expect.1
@@ -0,0 +1,25 @@
+ext2fs_check_desc: Corrupt group descriptor: bad block for inode table
+../e2fsck/e2fsck: Group descriptors look bad... trying backup blocks...
+../e2fsck/e2fsck: Bad magic number in super-block while using the backup blocks../e2fsck/e2fsck: going back to original superblock
+Note: if several inode or block bitmap blocks or part
+of the inode table require relocation, you may wish to try
+running e2fsck with the '-b 8193' option first.  The problem
+may lie only with the primary block group descriptors, and
+the backup block group descriptors may be OK.
+
+Inode table for group 1 is not in group.  (block 4294967295)
+WARNING: SEVERE DATA LOSS POSSIBLE.
+Relocate? yes
+
+One or more block group descriptor checksums are invalid.  Fix? yes
+
+Group descriptor 1 checksum is 0x6ea2, should be 0x7edd.  FIXED.
+Pass 1: Checking inodes, blocks, and sizes
+Error allocating 256 contiguous block(s) in block group 1 for inode table: Could not allocate block in ext2 filesystem
+e2fsck: aborted
+
+test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
+
+test_filesys: ********** WARNING: Filesystem still has errors **********
+
+Exit status is 0
diff --git a/tests/f_boundscheck/expect.2 b/tests/f_boundscheck/expect.2
new file mode 100644
index 00000000..c2170b8f
--- /dev/null
+++ b/tests/f_boundscheck/expect.2
@@ -0,0 +1,25 @@
+ext2fs_check_desc: Corrupt group descriptor: bad block for inode table
+../e2fsck/e2fsck: Group descriptors look bad... trying backup blocks...
+../e2fsck/e2fsck: Bad magic number in super-block while using the backup blocks../e2fsck/e2fsck: going back to original superblock
+Note: if several inode or block bitmap blocks or part
+of the inode table require relocation, you may wish to try
+running e2fsck with the '-b 8193' option first.  The problem
+may lie only with the primary block group descriptors, and
+the backup block group descriptors may be OK.
+
+Inode table for group 1 is not in group.  (block 4294967295)
+WARNING: SEVERE DATA LOSS POSSIBLE.
+Relocate? yes
+
+One or more block group descriptor checksums are invalid.  Fix? yes
+
+Group descriptor 1 checksum is 0x6ea2, should be 0x7edd.  FIXED.
+Pass 1: Checking inodes, blocks, and sizes
+Error allocating 256 contiguous block(s) in block group 1 for inode table: Could not allocate block in ext2 filesystem
+e2fsck: aborted
+
+test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
+
+test_filesys: ********** WARNING: Filesystem still has errors **********
+
+Exit status is 0
diff --git a/tests/f_boundscheck/image.bz2 b/tests/f_boundscheck/image.bz2
new file mode 100644
index 00000000..098d02e9
Binary files /dev/null and b/tests/f_boundscheck/image.bz2 differ
diff --git a/tests/f_boundscheck/name b/tests/f_boundscheck/name
new file mode 100644
index 00000000..192d2794
--- /dev/null
+++ b/tests/f_boundscheck/name
@@ -0,0 +1 @@
+infinite loop due to off by one error when finding free space for inode table relocation
diff --git a/tests/f_boundscheck/script b/tests/f_boundscheck/script
new file mode 100755
index 00000000..fbbce62b
--- /dev/null
+++ b/tests/f_boundscheck/script
@@ -0,0 +1,32 @@
+#!/bin/bash
+
+FSCK_OPT=-fy
+IMAGE=$test_dir/image.bz2
+
+bzip2 -d < $IMAGE > $TMPFILE
+#e2label $TMPFILE test_filesys
+
+# Run fsck to fix things?
+EXP1=$test_dir/expect.1
+OUT1=$test_name.1.log
+rm -rf $test_name.failed $test_name.ok
+
+$FSCK $FSCK_OPT $TMPFILE 2>&1 | head -n 1000 | tail -n +2 > $OUT1
+echo "Exit status is $?" >> $OUT1
+
+# Run a second time
+EXP2=$test_dir/expect.2
+OUT2=$test_name.2.log
+
+$FSCK $FSCK_OPT $TMPFILE 2>&1 | head -n 1000 | tail -n +2 > $OUT2
+echo "Exit status is $?" >> $OUT2
+
+# Figure out what happened
+if cmp -s $EXP1 $OUT1 && cmp -s $EXP2 $OUT2; then
+	echo "$test_name: $test_description: ok"
+	touch $test_name.ok
+else
+	echo "$test_name: $test_description: failed"
+	diff -u $EXP1 $OUT1 >> $test_name.failed
+	diff -u $EXP2 $OUT2 >> $test_name.failed
+fi