linux-kernel - [PATCH][next] netdevsim: Fix unsigned being compared to less than zero

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Message-Id: <20210603215657.154776-1-colin.king@canonical.com>
Date:   Thu,  3 Jun 2021 22:56:57 +0100
From:   Colin King <colin.king@...onical.com>
To:     Jakub Kicinski <kuba@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Dmytro Linkin <dlinkin@...dia.com>,
        Yuval Avnery <yuvalav@...dia.com>,
        Jiri Pirko <jiri@...dia.com>, netdev@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] netdevsim: Fix unsigned being compared to less than zero

From: Colin Ian King <colin.king@...onical.com>

The comparison of len < 0 is always false because len is a size_t. Fix
this by making len a ssize_t instead.

Addresses-Coverity: ("Unsigned compared against 0")
Fixes: d395381909a3 ("netdevsim: Add max_vfs to bus_dev")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/net/netdevsim/bus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/netdevsim/bus.c b/drivers/net/netdevsim/bus.c
index b56003dfe3cc..ccec29970d5b 100644
--- a/drivers/net/netdevsim/bus.c
+++ b/drivers/net/netdevsim/bus.c
@@ -111,7 +111,7 @@ ssize_t nsim_bus_dev_max_vfs_read(struct file *file,
 {
 	struct nsim_bus_dev *nsim_bus_dev = file->private_data;
 	char buf[11];
-	size_t len;
+	ssize_t len;
 
 	len = snprintf(buf, sizeof(buf), "%u\n", nsim_bus_dev->max_vfs);
 	if (len < 0)
-- 
2.31.1