Re: [PATCH net 3/3] net: fealnx: allocate the card index from an IDA
From: Andrew Lunn <andrew@lunn.ch>
Date: 2026-09-24 16:50:55
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On Thu, Sep 24, 2026 at 10:44:25AM +0000, Жамбакиев Радий Рикардинович wrote:
From: Radiy Zhambakiev <redacted> card_idx is a static counter that is incremented on every probe. It can overflow and wrap to a negative value, which then indexes options[] and full_duplex[] out of bounds. Large values also no longer fit in the 12-byte boardname[] buffer.
Seems very theoretical. For something which is never going to happen,
please keep it KISS:
if (card_idx > 100000) {
dev_error(..., "Please stop doing that!");
return -ENODEV;
}
Andrew
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