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Sat, 26 Sep 2026 08:00:42 -0700 (PDT) Date: Sat, 26 Sep 2026 08:00:42 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ab7de1a.e548f532.1ca396.002e.GAE@google.com> Subject: [moderation/CI] Re: migrate on fault for device pages From: syzbot ci To: syzkaller-upstream-moderation@googlegroups.com Cc: syzbot@lists.linux.dev Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable syzbot ci has tested the following series [v15] migrate on fault for device pages https://lore.kernel.org/all/20260924065313.899730-1-mpenttil@redhat.com * [PATCH v15 01/11] mm/Kconfig: changes for migrate on fault for device pag= es * [PATCH v15 02/11] mm: add helper to convert HMM pfn to migrate pfn * [PATCH v15 03/11] mm/hmm: preparations for HMM to participate in migratio= n * [PATCH v15 04/11] mm/hmm: do the plumbing for HMM to participate in migra= tion * [PATCH v15 05/11] mm/hmm: migrate collection in HMM pagewalk - pte level * [PATCH v15 06/11] mm/hmm: migrate collection in HMM pagewalk - pmd level * [PATCH v15 07/11] mm/hmm: add lazy MMU mode support for migration in HMM = pagewalk * [PATCH v15 08/11] mm/hmm: implement rollback for device page migration in= HMM pagewalk * [PATCH v15 09/11] mm: enable device page migration from HMM pagewalk * [PATCH v15 10/11] lib/test_hmm: add a new testcase for the migrate on fau= lt * [PATCH v15 11/11] Documentation/mm/hmm: document migration through hmm_ra= nge_fault() and found the following issue: kernel panic: Fatal exception Full report is available here: https://ci.syzbot.org/series/e83269ed-df96-404f-95bb-3815267ab7b6 *** kernel panic: Fatal exception tree: drm-next URL: https://gitlab.freedesktop.org/drm/kernel.git base: 2abe8e7e33973dda5dd24b89aa3ee52470a78265 arch: amd64 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp= 1~20260613092250.77), Debian LLD 22.1.8 config: https://ci.syzbot.org/builds/8d10dc50-efeb-4533-8f7a-d7fcf6b5a3b= 3/config AI triage: https://ci.syzbot.org/findings/cf11d87e-9315-4738-a194-f8ccc16c2= 736/triage_trajectory FS: 0000555594951500(0000) GS:ffff88818d6c2000(0000) knlGS:000000000000000= 0 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f384eb3aff8 CR3: 0000000171b40000 CR4: 00000000000006f0 Kernel panic - not syncing: Fatal exception Kernel Offset: disabled Rebooting in 86400 seconds.. *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com. To test a fix for this bug, please reply with `#syz test` (on a separate line) and attach the patch to the email. Notes: - The patch will be applied on top of the tested series (as an incremental fix). - To test a new version of the whole series, please send it directly to syzbot@lists.linux.dev. - Arguments like custom git repos and branches are not supported. The email will later be sent to: [akpm@linux-foundation.org apopple@nvidia.com balbirs@nvidia.com david@kern= el.org dri-devel@lists.freedesktop.org intel-xe@lists.freedesktop.org jgg@n= vidia.com leonro@nvidia.com liam.howlett@oracle.com linux-kernel@vger.kerne= l.org linux-mm@kvack.org ljs@kernel.org marpagan@redhat.com matthew.brost@i= ntel.com mhocko@suse.com mpenttil@redhat.com rppt@kernel.org surenb@google.= com vbabka@suse.cz ziy@nvidia.com] If the report looks fine to you, reply with: #syz upstream If the report is a false positive, reply with #syz invalid