From: Jaegeuk Kim jaegeuk@kernel.org
[ Upstream commit 0e0667b625cf64243df83171bff61f9d350b9ca5 ]
After quota_off, we'll get some dirty blocks. If put_super don't have a chance to flush them by checkpoint, it causes NULL pointer exception in end_io after iput(node_inode). (e.g., by checkpoint=disable)
Reviewed-by: Chao Yu yuchao0@huawei.com Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/f2fs/super.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 6851afc3bf805..d9106bbe7df63 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1886,6 +1886,12 @@ void f2fs_quota_off_umount(struct super_block *sb) set_sbi_flag(F2FS_SB(sb), SBI_NEED_FSCK); } } + /* + * In case of checkpoint=disable, we must flush quota blocks. + * This can cause NULL exception for node_inode in end_io, since + * put_super already dropped it. + */ + sync_filesystem(sb); }
static void f2fs_truncate_quota_inode_pages(struct super_block *sb)