linux-kernel - [PATCH -next] erofs: fix error return code in erofs_read

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Date:   Wed, 19 May 2021 14:16:57 +0000
From:   Wei Yongjun <weiyongjun1@...wei.com>
To:     <weiyongjun1@...wei.com>, Gao Xiang <xiang@...nel.org>,
        Chao Yu <chao@...nel.org>
CC:     <linux-erofs@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>,
        <kernel-janitors@...r.kernel.org>, Hulk Robot <hulkci@...wei.com>
Subject: [PATCH -next] erofs: fix error return code in erofs_read_superblock()

'ret' will be overwritten to 0 if erofs_sb_has_sb_chksum() return true,
thus 0 will return in some error handling cases. Fix to return negative
error code -EINVAL instead of 0.

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
---
 fs/erofs/super.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index bbf3bbd908e0..22991d22af5a 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -285,6 +285,7 @@ static int erofs_read_superblock(struct super_block *sb)
 			goto out;
 	}
 
+	ret = -EINVAL;
 	blkszbits = dsb->blkszbits;
 	/* 9(512 bytes) + LOG_SECTORS_PER_BLOCK == LOG_BLOCK_SIZE */
 	if (blkszbits != LOG_BLOCK_SIZE) {