linux-kernel - [PATCH -next v2] tls: rx: Fix unsigned comparison with less than zero

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Date:   Thu, 28 Jul 2022 11:10:19 +0800
From:   Yang Li <yang.lee@...ux.alibaba.com>
To:     kuba@...nel.org
Cc:     borisp@...dia.com, john.fastabend@...il.com, davem@...emloft.net,
        edumazet@...gle.com, pabeni@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Yang Li <yang.lee@...ux.alibaba.com>,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: [PATCH -next v2] tls: rx: Fix unsigned comparison with less than zero

The return from the call to tls_rx_msg_size() is int, it can be
a negative error code, however this is being assigned to an
unsigned long variable 'sz', so making 'sz' an int.

Eliminate the following coccicheck warning:
./net/tls/tls_strp.c:211:6-8: WARNING: Unsigned expression compared with zero: sz < 0

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
---

Changes in v2:
--According to Jakub's suggestion
Keep the sorting of the variable lines from longest to shortest.

 net/tls/tls_strp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/tls/tls_strp.c b/net/tls/tls_strp.c
index b945288c312e..841e721a8ec4 100644
--- a/net/tls/tls_strp.c
+++ b/net/tls/tls_strp.c
@@ -187,9 +187,10 @@ static int tls_strp_copyin(read_descriptor_t *desc, struct sk_buff *in_skb,
 			   unsigned int offset, size_t in_len)
 {
 	struct tls_strparser *strp = (struct tls_strparser *)desc->arg.data;
-	size_t sz, len, chunk;
 	struct sk_buff *skb;
 	skb_frag_t *frag;
+	size_t len, chunk;
+	int sz;
 
 	if (strp->msg_ready)
 		return 0;
-- 
2.20.1.7.g153144c