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 <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Link: https://lkml.kernel.org/r/[email protected]
chewitt · Jun 26, 2019 · a343536 · a343536
1 parent 2034a42
commit a343536
Showing 1 changed file with 1 addition and 1 deletion.
diff --git 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)