[PATCH 2/2] f2fs: add f2fs_bug_on() in f2fs_quota_read()

[Chao Yu <chao@kernel.org>]

mapping_read_folio_gfp() will return a folio, it should always be
uptodate, let's check folio uptodate status to detect any potenial
bug.

Signed-off-by: Chao Yu <chao@kernel.org>
---
 fs/f2fs/super.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 0ee783224953..ea207a9edc10 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -2973,6 +2973,17 @@ static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
 			goto repeat;
 		}
 
+		/*
+		 * should never happen, just leave f2fs_bug_on() here to catch
+		 * any potential bug.
+		 */
+		if (unlikely(!folio_test_uptodate(folio))) {
+			f2fs_folio_put(folio, true);
+			set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
+			f2fs_bug_on(F2FS_SB(sb), 1);
+			return -EIO;
+		}
+
 		memcpy_from_folio(data, folio, offset, tocopy);
 		f2fs_folio_put(folio, true);
 
-- 
2.49.0