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Date: Mon, 13 Feb 2012 14:29:37 +0100 From: Tomáš Janoušek <tomi@...i.cz> To: Stanislaw Gruszka <sgruszka@...hat.com> Cc: wwguy <wey-yi.w.guy@...el.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org> Subject: Re: iwlagn: memory corruption with WPA enterprise Hi, On Mon, Feb 13, 2012 at 02:09:04PM +0100, Stanislaw Gruszka wrote: > I also found this bug report > https://bugzilla.kernel.org/show_bug.cgi?id=37742 > where one user report iwlwifi corruption catched by IOMMU. I wasn't able to catch anything using IOMMU, and I also wasn't able to reproduce the issue using any userspace memory checking tool. Hence I tend to believe we're not dealing with a memory corruption at all, perhaps something like certain CPU flags/registers not being correctly saved/restored during wlan interrupts or something. When I have a sufficient amount of free time, I'll try to check this hypothesis and perhaps pinpoint the instruction the result of which is corrupted during wlan operation. > Tomáš, I do not remember, do you have the same problems on > older kernels i.e < 3.0 Yeah. I was able to reproduce it with 2.6.38.8 and 2.6.39.4 at least. Regards, -- Tomáš Janoušek, a.k.a. Liskni_si, http://work.lisk.in/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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