linux-kernel - [PATCH] fs: f2fs: remove WARN_ON in f2fs_is_valid

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Date:   Fri,  8 Apr 2022 13:22:06 +0800
From:   Dongliang Mu <dzm91@...t.edu.cn>
To:     Jaegeuk Kim <jaegeuk@...nel.org>, Chao Yu <chao@...nel.org>
Cc:     Dongliang Mu <mudongliangabcd@...il.com>,
        syzbot+763ae12a2ede1d99d4dc@...kaller.appspotmail.com,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: [PATCH] fs: f2fs: remove WARN_ON in f2fs_is_valid_blkaddr

From: Dongliang Mu <mudongliangabcd@...il.com>

In f2fs_is_valid_blkaddr, if type is DATA_GENERIC_ENHANCE or
DATA_GENERIC_ENHANCE_READ, it invokes WARN_ON(1) not matter
blkaddr is in the range or not.

Fix this by removing WARN_ON.

Note that, syzbot patch testing does not incur any further issues

Reported-by: syzbot+763ae12a2ede1d99d4dc@...kaller.appspotmail.com
Signed-off-by: Dongliang Mu <mudongliangabcd@...il.com>
---
 fs/f2fs/checkpoint.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index f5366feea82d..521498b2dd8c 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -158,7 +158,6 @@ static bool __is_bitmap_valid(struct f2fs_sb_info *sbi, block_t blkaddr,
 		f2fs_err(sbi, "Inconsistent error blkaddr:%u, sit bitmap:%d",
 			 blkaddr, exist);
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		WARN_ON(1);
 	}
 	return exist;
 }
@@ -196,7 +195,6 @@ bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
 			f2fs_warn(sbi, "access invalid blkaddr:%u",
 				  blkaddr);
 			set_sbi_flag(sbi, SBI_NEED_FSCK);
-			WARN_ON(1);
 			return false;
 		} else {
 			return __is_bitmap_valid(sbi, blkaddr, type);
-- 
2.25.1