linux-kernel - [PATCH v2] crypto: bcm/spu2

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Date: Fri, 22 Mar 2024 23:59:15 +0300
From: Aleksandr Mishin <amishin@...rgos.ru>
To: Herbert Xu <herbert@...dor.apana.org.au>
CC: Aleksandr Mishin <amishin@...rgos.ru>, "David S. Miller"
	<davem@...emloft.net>, Steve Lin <steven.lin1@...adcom.com>, Rob Rice
	<rob.rice@...adcom.com>, <linux-crypto@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <lvc-project@...uxtesting.org>
Subject: [PATCH v2] crypto: bcm/spu2 - Add buffer size check

In spu2_dump_omd() value of ptr is increased by ciph_key_len
instead of hash_iv_len which could lead to going beyond the
buffer boundaries.
Fix this bug by changing ciph_key_len to hash_iv_len.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 9d12ba86f818 ("crypto: brcm - Add Broadcom SPU driver")
Signed-off-by: Aleksandr Mishin <amishin@...rgos.ru>
---
v2: Fix commit message according to the Linux kernel rules

 drivers/crypto/bcm/spu2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/bcm/spu2.c b/drivers/crypto/bcm/spu2.c
index 07989bb8c220..3fdc64b5a65e 100644
--- a/drivers/crypto/bcm/spu2.c
+++ b/drivers/crypto/bcm/spu2.c
@@ -495,7 +495,7 @@ static void spu2_dump_omd(u8 *omd, u16 hash_key_len, u16 ciph_key_len,
 	if (hash_iv_len) {
 		packet_log("  Hash IV Length %u bytes\n", hash_iv_len);
 		packet_dump("  hash IV: ", ptr, hash_iv_len);
-		ptr += ciph_key_len;
+		ptr += hash_iv_len;
 	}
 
 	if (ciph_iv_len) {
-- 
2.30.2