From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f207.google.com (mail-oi1-f207.google.com [209.85.167.207]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1741530E84E for ; Wed, 29 Jul 2026 02:08:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785290912; cv=none; b=dkwiab5cA4Y+YB/0Dlh0OqNcXKS8/2eBezDUsiB9Y4u6+q29T8gTzkLSeZh8lAj0+ynMVl+/moASZILNzmZN9q5EZHtxgtsx5LAMex6AwdU2XwlQuLY0OhKJ0ELUSgaH6b0bduG8MkX7GjuG9l5gDcO3s95SLfO/olYZVOMth70= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785290912; c=relaxed/simple; bh=pGHZx/nHgFXyP+6Y5zCrCMpWYKFf3nbIwMO1dtZu5xs=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=nMNNgY3X7VFOtawHEB82gd1kMeJraHbvAedAh4etlSN5qCCX4ghLhy+QNyRRVRuwwhwN3LQ1lvl7N4EoS6691yKub5Yk09WhPp22apoWrqIjb8YMZOzuuVGbTYoCK2h6wNssZdBOQYgDNjgZjts7qOcxfRDhrxJMRTK4wmXh/S4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.167.207 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi1-f207.google.com with SMTP id 5614622812f47-4a49f09233dso301810b6e.2 for ; Tue, 28 Jul 2026 19:08:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785290910; x=1785895710; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=x1UOuKToWgt3LDEteYnVrTu190EMWkx8OgDd09ZNj7A=; b=EQlSpAXWTVhSu/ZLrqKvs0dlb8O1xABbgFg1w8k/7uG/e9J6XdrZZ52Ng0JeyW6qL4 fj17efWhhxnoovqxHXx3/oOduaREPeuRg0sy+nZRsymhhK8r4F9uMDzNZ2C6rQYZOEwe g89u6eaJb7gSrBxAFx8hhDMBTfAPhSITBAglIg4NspdD8eiIpXu2A5DppolahdGzsH0W 87utkCcev0qpFY5wecz/DFvyhnRqr/Mdd7g+JTwsamfM11IgOTGbhCOm3wDakY/1hQwG mhnYoZd7VypGPHQ0WL5c8418cVWT5UIuu8rsUv717B7R4Q4cTxR1jO/2k7aYhD0Bru6J 30ZA== X-Forwarded-Encrypted: i=1; AHgh+RrEx0q+W6BAjjOi+CZ6IXuhR6nr0bxkvPH/h1BJKJaJ7RkMgV8NXdREN+GTjwZSoJ2XfnuJZLEdeYoWDw0=@vger.kernel.org X-Gm-Message-State: AOJu0Yygc1/xQMRLRJb+hZ3ia1H2hWomilqJXRx/aLrKMZL0aXJpZAiR ebrYORZp+OkjhHPEpn3wywaQ8Yu3sWF4eowCNPd0bDt9nzmXndpBsN3chUDMD97Kik8y0NzCvab X+1yz8bgZF9L1IOrozlOqhGBiCYJVtEALTF9Hae+7ZF4SbnoOKe7R9Yn1Q1g= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1587:b0:495:f15d:58ee with SMTP id 5614622812f47-4ad5bb1c0bdmr3033249b6e.28.1785290910009; Tue, 28 Jul 2026 19:08:30 -0700 (PDT) Date: Tue, 28 Jul 2026 19:08:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a69609d.d9e86bb5.297b12.004a.GAE@google.com> Subject: [syzbot] [dri?] WARNING in drm_mm_takedown From: syzbot To: airlied@gmail.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, simona@ffwll.ch, syzkaller-bugs@googlegroups.com, tzimmermann@suse.de Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 62cc90241548 Merge tag 'mm-hotfixes-stable-2026-07-27-14-1.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=121f9632580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=d93b9064fe5f74af3aa3 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-62cc9024.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b10a9ae7e3d1/vmlinux-62cc9024.xz kernel image: https://storage.googleapis.com/syzbot-assets/b89124d39495/bzImage-62cc9024.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d93b9064fe5f74af3aa3@syzkaller.appspotmail.com ------------[ cut here ]------------ Memory manager not clean during takedown. WARNING: drivers/gpu/drm/drm_mm.c:965 at drm_mm_takedown+0x62/0x280 drivers/gpu/drm/drm_mm.c:965, CPU#3: syz.1.134/6649 Modules linked in: CPU: 3 UID: 0 PID: 6649 Comm: syz.1.134 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:drm_mm_takedown+0x62/0x280 drivers/gpu/drm/drm_mm.c:965 Code: 8b 43 38 48 39 c5 75 16 e8 2b c6 44 fc 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e c3 cc cc cc cc e8 15 c6 44 fc 48 8d 3d ce 75 68 0b <67> 48 0f b9 3a 48 c7 c0 e0 e3 46 8e 48 ba 00 00 00 00 00 fc ff df RSP: 0018:ffffc9000383f858 EFLAGS: 00010283 RAX: 0000000000021ab5 RBX: ffff888027c40c68 RCX: ffffc90007884000 RDX: 0000000000080000 RSI: ffffffff85c59a2b RDI: ffffffff912e1000 RBP: ffff888027c40ca0 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880277dbd80 R13: ffff8880277dbd98 R14: ffffffff85c47730 R15: 0000000000000000 FS: 00007fd2ebde36c0(0000) GS:ffff8880d60dc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa5b75eb580 CR3: 0000000025294000 CR4: 0000000000352ef0 Call Trace: drm_managed_release+0x1bb/0x540 drivers/gpu/drm/drm_managed.c:75 drm_dev_release drivers/gpu/drm/drm_drv.c:914 [inline] kref_put include/linux/kref.h:65 [inline] drm_dev_put.part.0+0xca/0x140 drivers/gpu/drm/drm_drv.c:948 drm_dev_put+0x1f/0x30 drivers/gpu/drm/drm_drv.c:947 virtio_dev_remove+0xb8/0x170 drivers/virtio/virtio.c:375 device_remove+0xcb/0x180 drivers/base/dd.c:616 __device_release_driver drivers/base/dd.c:1349 [inline] device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372 bus_remove_device+0x2bc/0x560 drivers/base/bus.c:664 device_del+0x376/0x9b0 drivers/base/core.c:3961 device_unregister+0x1d/0xe0 drivers/base/core.c:4002 unregister_virtio_device+0x39/0x60 drivers/virtio/virtio.c:594 virtio_pci_remove+0x7c/0x110 drivers/virtio/virtio_pci_common.c:758 pci_device_remove+0xb2/0x1d0 drivers/pci/pci-driver.c:512 device_remove+0xcb/0x180 drivers/base/dd.c:616 __device_release_driver drivers/base/dd.c:1349 [inline] device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372 unbind_store+0xf8/0x110 drivers/base/bus.c:244 drv_attr_store+0x74/0xb0 drivers/base/bus.c:125 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6ac/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd2eaf9de99 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd2ebde3028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fd2eb225fa0 RCX: 00007fd2eaf9de99 RDX: 000000000000000d RSI: 0000200000000280 RDI: 0000000000000008 RBP: 00007fd2eb033eaf R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd2eb226038 R14: 00007fd2eb225fa0 R15: 00007ffd8ff0ecc8 ---------------- Code disassembly (best guess): 0: 8b 43 38 mov 0x38(%rbx),%eax 3: 48 39 c5 cmp %rax,%rbp 6: 75 16 jne 0x1e 8: e8 2b c6 44 fc call 0xfc44c638 d: 48 83 c4 08 add $0x8,%rsp 11: 5b pop %rbx 12: 5d pop %rbp 13: 41 5c pop %r12 15: 41 5d pop %r13 17: 41 5e pop %r14 19: c3 ret 1a: cc int3 1b: cc int3 1c: cc int3 1d: cc int3 1e: e8 15 c6 44 fc call 0xfc44c638 23: 48 8d 3d ce 75 68 0b lea 0xb6875ce(%rip),%rdi # 0xb6875f8 * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 48 c7 c0 e0 e3 46 8e mov $0xffffffff8e46e3e0,%rax 36: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 3d: fc ff df --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup