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Message-Id: <20190620141039.9874-4-ferdinand.blomqvist@gmail.com>
Date: Thu, 20 Jun 2019 17:10:35 +0300
From: Ferdinand Blomqvist <ferdinand.blomqvist@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH v2 3/7] rslib: decode_rs: Fix length parameter check
The length of the data load must be at least one. Or in other words,
there must be room for at least 1 data and nroots parity symbols after
shortening the RS code.
Signed-off-by: Ferdinand Blomqvist <ferdinand.blomqvist@...il.com>
---
lib/reed_solomon/decode_rs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/reed_solomon/decode_rs.c b/lib/reed_solomon/decode_rs.c
index 3313bf944ff1..22006eaa41e6 100644
--- a/lib/reed_solomon/decode_rs.c
+++ b/lib/reed_solomon/decode_rs.c
@@ -39,7 +39,7 @@
/* Check length parameter for validity */
pad = nn - nroots - len;
- BUG_ON(pad < 0 || pad >= nn);
+ BUG_ON(pad < 0 || pad >= nn - nroots);
/* Does the caller provide the syndrome ? */
if (s != NULL)
--
2.17.2
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