From: Johannes Stezenbach <js@sig21.net>
To: barebox@lists.infradead.org
Subject: [PATCH 4/5] devfs: don't erase past the end of the partition
Date: Wed, 6 Jun 2012 18:04:59 +0200 [thread overview]
Message-ID: <1338998700-23012-5-git-send-email-js@sig21.net> (raw)
In-Reply-To: <1338998700-23012-1-git-send-email-js@sig21.net>
"erase /dev/myflash0.mypart 0xf0000+0xf0000" could erase past
the end of the partition.
Signed-off-by: Johannes Stezenbach <js@sig21.net>
---
fs/devfs.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/devfs.c b/fs/devfs.c
index e3a21ae..ae48451 100644
--- a/fs/devfs.c
+++ b/fs/devfs.c
@@ -73,6 +73,9 @@ static int devfs_erase(struct device_d *_dev, FILE *f, size_t count, unsigned lo
if (!cdev->ops->erase)
return -ENOSYS;
+ if (count + offset > cdev->size)
+ count = cdev->size - offset;
+
return cdev->ops->erase(cdev, count, offset + cdev->offset);
}
--
1.7.10
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next prev parent reply other threads:[~2012-06-06 16:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-06 16:04 [PATCH 0/5] minor SPI flash fixes Johannes Stezenbach
2012-06-06 16:04 ` [PATCH 1/5] m25p80: prevent endless loop in erase Johannes Stezenbach
2012-06-06 16:04 ` [PATCH 2/5] m25p80: allow erase to be interrupted Johannes Stezenbach
2012-06-06 16:04 ` [PATCH 3/5] m25p80: progressbar tweak Johannes Stezenbach
2012-06-06 16:04 ` Johannes Stezenbach [this message]
2012-06-06 16:05 ` [PATCH 5/5] fs: limit flash erase and protect to the partiton boundary Johannes Stezenbach
2012-06-07 17:32 ` [PATCH 0/5] minor SPI flash fixes Sascha Hauer
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