From: "Yang, Philip" <Philip.Yang@amd.com>
To: "Michel Dänzer" <michel@daenzer.net>,
"Jérôme Glisse" <jglisse@redhat.com>
Cc: "amd-gfx@lists.freedesktop.org" <amd-gfx@lists.freedesktop.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: KASAN caught amdgpu / HMM use-after-free
Date: Wed, 27 Feb 2019 17:14:04 +0000 [thread overview]
Message-ID: <83fde7eb-abab-e770-efd5-89bc9c39fdff@amd.com> (raw)
In-Reply-To: <e8466985-a66b-468b-5fff-6e743180da67@daenzer.net>
Hi Michel,
Yes, I found the same issue and the bug has been fixed by Jerome:
876b462120aa mm/hmm: use reference counting for HMM struct
The fix is on hmm-for-5.1 branch, I cherry-pick it into my local branch
to workaround the issue.
Regards,
Philip
On 2019-02-27 12:02 p.m., Michel Dänzer wrote:
>
> See the attached dmesg excerpt. I've hit this a few times running piglit
> with amd-staging-drm-next, first on February 22nd.
>
> The memory was freed after calling hmm_mirror_unregister in
> amdgpu_mn_destroy.
>
>
next prev parent reply other threads:[~2019-02-27 17:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-27 17:02 Michel Dänzer
2019-02-27 17:14 ` Yang, Philip [this message]
2019-02-27 17:33 ` Michel Dänzer
2019-02-27 18:05 ` Yang, Philip
2019-02-27 18:32 ` Deucher, Alexander
2019-02-27 18:48 ` Yang, Philip
2019-02-27 17:24 ` Jerome Glisse
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