Set reserved GDT blocks equals 100, then resize fs, will trigger null pointer. Regression test for commit b55c3cd102a6 ext4: add reserved GDT blocks check. Signed-off-by: Sun Ke <sunke32@xxxxxxxxxx> --- tests/ext4/057 | 46 ++++++++++++++++++++++++++++++++++++++++++++++ tests/ext4/057.out | 2 ++ 2 files changed, 48 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..f4bbcd32 --- /dev/null +++ b/tests/ext4/057 @@ -0,0 +1,46 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2022 HUAWEI. All Rights Reserved. +# +# FS QA Test 057 +# +# Set reserved GDT blocks equals 100, then resize fs, will trigger 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_command "$TUNE2FS_PROG" tune2fs +_require_command "$RESIZE2FS_PROG" resize2fs +_require_command "$DEBUGFS_PROG" debugfs +_require_scratch_size $((1024 * 1024)) #kB +_require_scratch_nocheck + +# set fs size 512M +dev_size=$((512 * 1024 * 1024)) +MKFS_OPTIONS="-O ^resize_inode $MKFS_OPTIONS" _scratch_mkfs_sized $dev_size \ + >>$seqres.full 2>&1 || _fail "mkfs failed" + +$DEBUGFS_PROG -w -R "set_super_value s_reserved_gdt_blocks 100" $SCRATCH_DEV \ + >>$seqres.full 2>&1 + +$DEBUGFS_PROG -R "show_super_stats -h" $SCRATCH_DEV 2>/dev/null | \ + grep "Reserved GDT blocks" + +_scratch_mount + +# resize fs will trigger NULL pointer in ext4_flex_group_add +$RESIZE2FS_PROG $SCRATCH_DEV 1G >> $seqres.full 2>&1 + +# success, all done +status=0 +exit diff --git a/tests/ext4/057.out b/tests/ext4/057.out new file mode 100644 index 00000000..99423e16 --- /dev/null +++ b/tests/ext4/057.out @@ -0,0 +1,2 @@ +QA output created by 057 +Reserved GDT blocks: 100 -- 2.13.6
