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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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