linux-kernel - Re: [PATCH] i2400m/USB: fix error return when rx

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Message-Id: <20191202.131327.1991319206654704992.davem@davemloft.net>
Date:   Mon, 02 Dec 2019 13:13:27 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     colin.king@...onical.com
Cc:     inaky@...ux.intel.com, linux-wimax@...el.com,
        netdev@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2400m/USB: fix error return when rx_size is too large

From: Colin King <colin.king@...onical.com>
Date: Mon,  2 Dec 2019 17:42:46 +0000

> From: Colin Ian King <colin.king@...onical.com>
> 
> Currently when the rx_size is too large the intended error
> -EINVAL is not being returned as this is being assigned to
> result rather than rx_skb. Fix this be setting rx_skb
> to ERR_PTR(-EINVAL) so that the error is returned in rx_skb
> as originally intended.
> 
> Addresses-Coverity: ("Unused value")
> Fixes: a8ebf98f5414 ("i2400m/USB: TX and RX path backends")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

This leaks rx_skb, the caller is supposed to clean up rx_skb
by freeing it if this function doesn't transmit it successfully.