linux-kernel - [PATCH] qnx4: do not interpret -EIO as a correct address

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Message-Id: <20201023211604.159074-1-ztong0001@gmail.com>
Date:   Fri, 23 Oct 2020 17:16:04 -0400
From:   Tong Zhang <ztong0001@...il.com>
To:     Anders Larsen <al@...rsen.net>, linux-kernel@...r.kernel.org
Cc:     ztong0001@...il.com
Subject: [PATCH] qnx4: do not interpret -EIO as a correct address

qnx4_block_map() may return -EIO on funny qnx4 fs image, in this case do
not interpret -EIO as a correct address

Signed-off-by: Tong Zhang <ztong0001@...il.com>
---
 fs/qnx4/inode.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index e8da1cde87b9..d3a40c5b1a9a 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -59,6 +59,8 @@ static int qnx4_get_block( struct inode *inode, sector_t iblock, struct buffer_h
 	QNX4DEBUG((KERN_INFO "qnx4: qnx4_get_block inode=[%ld] iblock=[%ld]\n",inode->i_ino,iblock));
 
 	phys = qnx4_block_map( inode, iblock );
+	if (phys == -EIO)
+		return -EIO;
 	if ( phys ) {
 		// logical block is before EOF
 		map_bh(bh, inode->i_sb, phys);
-- 
2.25.1