From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f69.google.com (mail-oo1-f69.google.com [209.85.161.69]) (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 2D0B3496D39 for ; Mon, 21 Sep 2026 12:43:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789994585; cv=none; b=TQrxJblpbpj4Qz8b//ltwkYLAoBnFjumNaqByIquOK7beKIClfV4nX1BbgpEVhgVhCS3dt3dEm3EcD7U7vj9KvahZkUD5X9MLp9cAwoa+keUkHMWLIvDNXBuyS2rzsICmkUH0mnazDGmdcQ1qbVFX/eQ+60cf9ufd3OZT823Y4o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789994585; c=relaxed/simple; bh=t8+PdfneDu1hxHC8QDP5ldRMtCmeAtS8ppcZKVYE45U=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=DT1+bK8TGujJ+f0FgYgc0wulhuNelvTLeHpKmWljhMBcaQT3IexwSITS07XmsOqhTS0qLaWYT4J6cxF5SyQqPsKU9HNmtVt5b2VbTehtc0cpq9lkeLUhy6Dgi1IUlxW/qDXyVzgF3C6/iE1bZbCCiUsoDjZ7QdcBHFcBNdR46yc= 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=209.85.161.69 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-oo1-f69.google.com with SMTP id 006d021491bc7-6bc8f608979so2329442eaf.3 for ; Mon, 21 Sep 2026 05:43:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789994583; x=1790599383; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=nlciio7ok7KxUJezaVMgg7fHEPOABsp4fse8OC9WpMA=; b=Gia/9GTjcEIPSNb7JkaA91vaaJwngGF/NU2G4nvGkCN3Y90xsUHELwyhM+WytVoBY7 9028U9bOUefR2NhJAPWRgGsip23y9GpMGM0lNH5bMM74ByUjaDU9Dy9W/tHTgKsmr0yD zvSrQgyvEY9bbaHB4ydrwxsTLb1uHT8gcq4+nMQMFv4lcbD3qBuQgaGxmQOZ38bRzhSI L0z4lxiWnUyOsii4Ik0nujFs5wYooHRUhxdV0ur2B6QhspKonOsWqvt3mNzaIKkNLKnK v7nKDOFOHC4JPLUpxWFpVfFDVv4QNr/EV1N3qwPVcXBy6PGTKv6mchdJl6eHkzvJzk6i b/AQ== X-Gm-Message-State: AFuF++nJ2EsDTUNXQhzRIJBsifBTCl8qzm9y39ayjLFjVZbQXMR7SJxO +opJXCWfeGoIkjKXkLvDZ/qTNzZZi4FGXe3ypa3V1AAPbQaPnvE8MOOlMNyqPfAYrnb8WXIf7Ns 312IMLzMd6X7xmLYO6kPOKrZZC1yZExzkfMCRypYUnj6T7hW8Ipid2zSIk+Y= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:198e:b0:6bd:d2ad:55a1 with SMTP id 006d021491bc7-6ca9a1343b2mr9098950eaf.9.1789994583010; Mon, 21 Sep 2026 05:43:03 -0700 (PDT) Date: Mon, 21 Sep 2026 05:43:02 -0700 In-Reply-To: <20260921122100.6242-1-nsvatoslav515@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ab12656.e548f532.1ca396.0013.GAE@google.com> Subject: Re: [syzbot] [kernel?] WARNING in iounmap From: syzbot To: linux-kernel@vger.kernel.org, nsvatoslav515@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in drm_mm_takedown Console: switching to colour dummy device 80x25 ------------[ 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.0.17/6259 Modules linked in: CPU: 3 UID: 0 PID: 6259 Comm: syz.0.17 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 8b b6 38 fc 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e e9 4a b0 00 06 e8 75 b6 38 fc 48 8d 3d fe 27 7d 0b <67> 48 0f b9 3a 48 c7 c0 00 84 65 8e 48 ba 00 00 00 00 00 fc ff df RSP: 0018:ffffc90003b77860 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888026e90068 RCX: 0000000000000000 RDX: ffff8880334a4b00 RSI: ffffffff85d3669b RDI: ffffffff91508ea0 RBP: ffff888026e900a0 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888027ef2e80 R13: ffff888027ef2e98 R14: ffffffff85d238e0 R15: 0000000000000000 FS: 00007ff311d0f6c0(0000) GS:ffff8880d5e59000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff310deb840 CR3: 000000003497d000 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:924 [inline] kref_put include/linux/kref.h:65 [inline] drm_dev_put.part.0+0xca/0x140 drivers/gpu/drm/drm_drv.c:958 drm_dev_put+0x1f/0x30 drivers/gpu/drm/drm_drv.c:957 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:3965 device_unregister+0x1d/0xe0 drivers/base/core.c:4006 unregister_virtio_device+0x39/0x60 drivers/virtio/virtio.c:608 virtio_pci_remove+0x7c/0x110 drivers/virtio/virtio_pci_common.c:760 pci_device_remove+0xb2/0x1d0 drivers/pci/pci-driver.c:535 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+0x6af/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff310d9e159 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:00007ff311d0f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ff311025fa0 RCX: 00007ff310d9e159 RDX: 000000000000000d RSI: 0000200000000300 RDI: 0000000000000004 RBP: 00007ff310e3503b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff311026038 R14: 00007ff311025fa0 R15: 00007ffca5d5c2c8 ---------------- 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 8b b6 38 fc call 0xfc38b698 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: e9 4a b0 00 06 jmp 0x600b068 1e: e8 75 b6 38 fc call 0xfc38b698 23: 48 8d 3d fe 27 7d 0b lea 0xb7d27fe(%rip),%rdi # 0xb7d2828 * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 48 c7 c0 00 84 65 8e mov $0xffffffff8e658400,%rax 36: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 3d: fc ff df Tested on: commit: 704340f1 Merge tag 'x86_urgent_for_7.3-rc4' of git://g.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=177894c9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8c5c3949d762a91f dashboard link: https://syzkaller.appspot.com/bug?extid=ca1ef9e2e234b8d3599b compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 patch: https://syzkaller.appspot.com/x/patch.diff?x=11bc9005580000