[PATCH v3 1/2] ext4: resize fs after resize_inode without e2fsck

[Sun Ke <sunke32@huawei.com>]

Forget to run requested e2fsck after resize_inode, then resize fs, it
will trigger off null pointer.

Regression test for commit b55c3cd102a6 ext4: add reserved GDT blocks
check.

Signed-off-by: Sun Ke <sunke32@huawei.com>
---
 tests/ext4/057     | 44 ++++++++++++++++++++++++++++++++++++++++++++
 tests/ext4/057.out |  3 +++
 2 files changed, 47 insertions(+)
 create mode 100755 tests/ext4/057
 create mode 100644 tests/ext4/057.out

diff --git a/tests/ext4/057 b/tests/ext4/057
new file mode 100755
index 00000000..44dae76c
--- /dev/null
+++ b/tests/ext4/057
@@ -0,0 +1,44 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2022 HUAWEI.  All Rights Reserved.
+#
+# FS QA Test 057
+#
+# Forget to run requested e2fsck after resize_inode, then resize fs,
+# it will trigger off null pointer.
+#
+# Regression test for commit
+# b55c3cd102a6 ext4: add reserved GDT blocks check
+#
+. ./common/preamble
+_begin_fstest auto resize quick
+
+# real QA test starts here
+
+# Modify as appropriate.
+_supported_fs ext4
+_fixed_by_kernel_commit b55c3cd102a6 \
+	"ext4: add reserved GDT blocks check"
+
+_require_scratch
+_require_command "$TUNE2FS_PROG" tune2fs
+_require_command "$RESIZE2FS_PROG" resize2fs
+_require_scratch_size $((1024 * 1024)) #kB
+
+# set fs size 512M
+dev_size=$((512 * 1024 * 1024))
+_scratch_mkfs_sized $dev_size >> $seqres.full 2>&1
+
+# forget to run requested e2fsck after resize_inode
+$TUNE2FS_PROG -O ^resize_inode $SCRATCH_DEV | grep -w "e2fsck"
+
+_scratch_mount
+
+# resize fs will trigger NULL pointer in ext4_flex_group_add
+$RESIZE2FS_PROG $SCRATCH_DEV 1G >> $seqres.full 2>&1
+
+echo "Silence is golden"
+
+# success, all done
+status=0
+exit
diff --git a/tests/ext4/057.out b/tests/ext4/057.out
new file mode 100644
index 00000000..4784ad7e
--- /dev/null
+++ b/tests/ext4/057.out
@@ -0,0 +1,3 @@
+QA output created by 057
+Please run e2fsck -f on the filesystem.
+Silence is golden
-- 
2.13.6