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Re: [PATCH] nl80211: Fix unfiltered GET_INTERFACE dumps

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Hi Arend,

On 08/25/2016 04:35 PM, Arend van Spriel wrote:
On 25-08-16 22:44, Denis Kenzior wrote:
dump_wiphy_parse only assigns filter_wiphy if one of the supported
NL80211 attributes is present.  So for unfiltered dumps, filter_wiphy
was always initialized to 0, and only interface 0 was dumped.

This was introduced in commit 2d75da13fbb957e955d212555b91101cef36f0ce.

Reported-by: Arend Van Spriel <arend.vanspriel@xxxxxxxxxxxx>

Actually sent a patch for this issue a little earlier. I should have
Cc'ed you explicitly, I guess.


Whoops. I saw your regression report and didn't look to see if you fixed it :)

Looking at your patch, I'm worried that

-	int filter_wiphy = -1;
+	int filter_wiphy;

might still break things, since Johannes used:

	if (!cb->args[2]) {
		...
        } else if (cb->args[2] > 0) {
                filter_wiphy = cb->args[2] - 1;
        }

So for unfiltered dumps, filter_wiphy would not be initialized properly for the second & onward call of nl80211_dump_interface. Right?

Regards,
-Denis



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