From: Ferdinand Blomqvist <ferdinand.blomqvist@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Subject: [RFC PATCH 3/7] rslib: decode_rs: Fix length parameter check
Date: Sat, 30 Mar 2019 20:29:43 +0200 [thread overview]
Message-ID: <20190330182947.8823-4-ferdinand.blomqvist@gmail.com> (raw)
In-Reply-To: <20190330182947.8823-1-ferdinand.blomqvist@gmail.com>
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@gmail.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
next prev parent reply other threads:[~2019-03-30 18:30 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-30 18:29 [RFC PATCH 0/7] rslib: RS decoder is severely broken Ferdinand Blomqvist
2019-03-30 18:29 ` [RFC PATCH 1/7] rslib: Add tests for the encoder and decoder Ferdinand Blomqvist
2019-06-17 20:44 ` Thomas Gleixner
2019-03-30 18:29 ` [RFC PATCH 2/7] rslib: Fix decoding of shortened codes Ferdinand Blomqvist
2019-06-17 20:46 ` Thomas Gleixner
2019-03-30 18:29 ` Ferdinand Blomqvist [this message]
2019-06-17 20:46 ` [RFC PATCH 3/7] rslib: decode_rs: Fix length parameter check Thomas Gleixner
2019-03-30 18:29 ` [RFC PATCH 4/7] rslib: decode_rs: code cleanup Ferdinand Blomqvist
2019-06-17 20:47 ` Thomas Gleixner
2019-03-30 18:29 ` [RFC PATCH 5/7] rslib: Fix handling of of caller provided syndrome Ferdinand Blomqvist
2019-06-17 20:49 ` Thomas Gleixner
2019-03-30 18:29 ` [RFC PATCH 6/7] rslib: Update documentation Ferdinand Blomqvist
2019-06-17 20:49 ` Thomas Gleixner
2019-03-30 18:29 ` [RFC PATCH 7/7] rslib: Fix remaining decoder flaws Ferdinand Blomqvist
2019-06-17 21:00 ` Thomas Gleixner
2019-06-20 12:09 ` Ferdinand Blomqvist
2019-04-04 11:24 ` [RFC PATCH 0/7] rslib: RS decoder is severely broken Thomas Gleixner
2019-05-09 15:09 ` Ferdinand Blomqvist
2019-05-24 7:25 ` Thomas Gleixner
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