From: Brian Norris <computersforpeace@gmail.com>
Date: Mon, 31 Aug 2015 21:34:55 +0000 (-0700)
Subject: flash_{un,}lock: don't allow "last byte + 1"
X-Git-Tag: v2.0.0-rc1~63
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=ba224c47a1f71f01c0e65da85718247af91a5cc4;p=mtd-utils.git

flash_{un,}lock: don't allow "last byte + 1"

A lock/unlock/islocked ioctl() should be prevented from anything past
the last byte, inclusive. But we were doing an exclusive check.

This isn't a big deal, as the kernel MTD APIs would be guarding this
anyway, but let's do this for completeness.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---

diff --git a/flash_unlock.c b/flash_unlock.c
index 7a7a773..d775c0b 100644
--- a/flash_unlock.c
+++ b/flash_unlock.c
@@ -168,7 +168,7 @@ int main(int argc, char *argv[])
 	} else {
 		mtdLockInfo.start = 0;
 	}
-	if (mtdLockInfo.start > mtdInfo.size)
+	if (mtdLockInfo.start >= mtdInfo.size)
 		errmsg_die("%#x is beyond device size %#x",
 			mtdLockInfo.start, mtdInfo.size);