Re: [PATCH] ALSA: usb-audio: fix possible hang and overflow in parse_uac2_sample_rate_range()

[Xi Wang]

On Jan 8, 2012, at 4:09 AM, Takashi Iwai wrote:
> As of now, I have little time to evaluate, so I might have missed
> something, but I wonder whether 
> 
> 		/* avoid overflow */
> 		if (nr_rates == KMALLOC_MAX_SIZE / sizeof(int))
> 			break;
> 
> is the best way to check.  This looks ugly to me.
> If we need to limit the number of rates, better to define some proper
> numbers as the upper limit.  And then, it should warn, not only
> breaking loop.

Thanks for looking into this.  Yeah, I agree using something like
MAX_NR_RATES is better.  Is 65535 okay or do we need a larger limit?

- xi
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/