From: Roel Kluin <roel.kluin@gmail.com>
Date: Fri, 5 Mar 2010 21:42:32 +0000 (-0800)
Subject: cryptocop: fix assertion in create_output_descriptors()
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=cda1c5af26a00ee31cdc5ab8321a1be7851cbfff;p=openwrt%2Fstaging%2Fblogic.git

cryptocop: fix assertion in create_output_descriptors()

size_t desc_len cannot be less than 0, test before the subtraction.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/arch/cris/arch-v32/drivers/cryptocop.c b/arch/cris/arch-v32/drivers/cryptocop.c
index fd529a0ec758..b70fb34939d9 100644
--- a/arch/cris/arch-v32/drivers/cryptocop.c
+++ b/arch/cris/arch-v32/drivers/cryptocop.c
@@ -628,9 +628,9 @@ static int create_output_descriptors(struct cryptocop_operation *operation, int
 		cdesc->dma_descr->buf = (char*)virt_to_phys(operation->tfrm_op.indata[*iniov_ix].iov_base + *iniov_offset);
 		cdesc->dma_descr->after = cdesc->dma_descr->buf + dlength;
 
+		assert(desc_len >= dlength);
 		desc_len -= dlength;
 		*iniov_offset += dlength;
-		assert(desc_len >= 0);
 		if (*iniov_offset >= operation->tfrm_op.indata[*iniov_ix].iov_len) {
 			*iniov_offset = 0;
 			++(*iniov_ix);