linux-kernel - Re: [PATCH] bnx2x: Fix potential infinite loop

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Date:   Wed, 07 Apr 2021 15:13:10 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     colin.king@...onical.com
Cc:     aelior@...vell.com, skalluru@...vell.com,
        GR-everest-linux-l2@...vell.com, kuba@...nel.org,
        eilong@...adcom.com, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] bnx2x: Fix potential infinite loop

From: Colin King <colin.king@...onical.com>
Date: Wed,  7 Apr 2021 15:28:02 +0100

> From: Colin Ian King <colin.king@...onical.com>
> 
> The for_each_tx_queue loop iterates with a u8 loop counter i and
> compares this with the loop upper limit of bp->num_queues that
> is an int type.  There is a potential infinite loop if bp->num_queues
> is larger than the u8 loop counter. Fix this by making the loop
> counter the same type as bp->num_queues.
> 
> Addresses-Coverity: ("Infinite loop")
> Fixes: ad5afc89365e ("bnx2x: Separate VF and PF logic")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Please show how num_queues can take on a value larger than 255.

Thank you.