From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6AA34C55167 for ; Fri, 31 Jul 2026 08:15:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B1A6B10F1B8; Fri, 31 Jul 2026 08:15:34 +0000 (UTC) Received: from mail-oi1-f206.google.com (mail-oi1-f206.google.com [209.85.167.206]) by gabe.freedesktop.org (Postfix) with ESMTPS id B70FC10F1B8 for ; Fri, 31 Jul 2026 08:15:33 +0000 (UTC) Received: by mail-oi1-f206.google.com with SMTP id 5614622812f47-4a4a7d0362eso951659b6e.0 for ; Fri, 31 Jul 2026 01:15:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785485733; x=1786090533; 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=5tH1CMhR+uKj4zjBpyik5GGXSV/ZSXI9oXDQTtL9QEM=; b=G2stB/lMt3/yGG+dBRAxrSaYny74NbTZ4nBvlgNPiy5E3580/6y8EAlEOwoaZB2TF6 rVaaq7ZKHdXAKEtLrVqBBV7sliW1M/+ItBiwCkAF1+vap2wT4++r3MjyQro/R3qzmL0n qNgPPTp1GJDp6Dj5crXo84gbFPE77y1UpFYnjC7Eha62aNQJtQfn3zzj9ZsYaJbPtEAS LesWlbi5yEd4chhWTgPBg3kGzae+V/TStrradBqnsQyqYhY2g0M9vpF33r5zfM4z7QeB tf0TsCaI8e+AZr2w25chi7md25N8Ug7hoaa/Lj9sC7Fv26q29rv2eOWCK4oWmc+zczxt JHFQ== X-Forwarded-Encrypted: i=1; AHgh+Rry53SYw42K/WrfHVZBjEmMjUT8ITKLt92/kmAPHvp68dzTA9LbXLWwCaGzWCK0ZQagnIvWRCCAImQ=@lists.freedesktop.org X-Gm-Message-State: AOJu0YxAm9amEZQ8i7yREBOtiNceupauAr/aB+0cylVOfsbEKwcZ0LUV qJcSuyCm4/O/WPMhoS2K485jhZKOOH3+V+Ll/jMhZHt563SJyChEZtI1mfLP1ncla4nOgCV1fiG CpFl5SNyrdlKg9435GtuUqlqUaQg6yXsqYIIZz0+YlPsenS0299TFe97sEjA= MIME-Version: 1.0 X-Received: by 2002:a05:6808:1c06:b0:4a3:d66b:240b with SMTP id 5614622812f47-4ae5abaa7d3mr936989b6e.18.1785485732891; Fri, 31 Jul 2026 01:15:32 -0700 (PDT) Date: Fri, 31 Jul 2026 01:15:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a6c59a4.77639fcc.3d4fd0.0022.GAE@google.com> Subject: [syzbot] [dri?] WARNING in __drm_atomic_helper_set_config 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" X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hello, syzbot found the following issue on: HEAD commit: 4235cb24ec1e Merge tag 'vfs-7.2-rc5.fixes' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1753a7b1580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f221a1b5d497ed15 dashboard link: https://syzkaller.appspot.com/bug?extid=ca23c8570669ead78867 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 userspace arch: i386 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-4235cb24.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/68eef4847f46/vmlinux-4235cb24.xz kernel image: https://storage.googleapis.com/syzbot-assets/77e73df69f7f/bzImage-4235cb24.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ca23c8570669ead78867@syzkaller.appspotmail.com ------------[ cut here ]------------ !set->fb WARNING: drivers/gpu/drm/drm_atomic.c:1951 at __drm_atomic_helper_set_config+0xa45/0xee0 drivers/gpu/drm/drm_atomic.c:1951, CPU#0: syz.2.1107/9271 Modules linked in: CPU: 0 UID: 0 PID: 9271 Comm: syz.2.1107 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:__drm_atomic_helper_set_config+0xa45/0xee0 drivers/gpu/drm/drm_atomic.c:1951 Code: 84 c0 74 09 3c 03 7f 05 e8 c8 b6 bd fc 45 89 75 38 e9 0e fb ff ff e8 fa 28 4e fc 90 0f 0b 90 e9 9f f7 ff ff e8 ec 28 4e fc 90 <0f> 0b 90 e9 47 f7 ff ff 8b 6c 24 28 e8 da 28 4e fc 49 8d 7c 24 08 RSP: 0018:ffffc9000efb7950 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888029878500 RCX: ffffffff85bb7a4b RDX: ffff88802a308000 RSI: ffffffff85bb8374 RDI: ffff88802a308000 RBP: ffff88802a874b00 R08: 0000000000000007 R09: fffffffffffff000 R10: ffff888028f94c00 R11: 0000000000000000 R12: ffff888077d2d300 R13: ffff888028f94c00 R14: ffff8880141c1400 R15: ffff88806c029368 FS: 0000000000000000(0000) GS:ffff888096be3000(0063) knlGS:00000000571f8480 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000027e6e000 CR4: 0000000000352ef0 Call Trace: drm_client_modeset_commit_atomic+0x53d/0x7e0 drivers/gpu/drm/drm_client_modeset.c:1085 drm_client_modeset_commit_locked+0x14d/0x580 drivers/gpu/drm/drm_client_modeset.c:1207 drm_client_modeset_commit+0x4f/0x80 drivers/gpu/drm/drm_client_modeset.c:1233 __drm_fb_helper_restore_fbdev_mode_unlocked.part.0+0x137/0x160 drivers/gpu/drm/drm_fb_helper.c:138 __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:126 [inline] drm_fb_helper_restore_fbdev_mode_unlocked+0x93/0xc0 drivers/gpu/drm/drm_fb_helper.c:169 drm_fbdev_client_restore+0x1b/0x30 drivers/gpu/drm/clients/drm_fbdev_client.c:45 drm_client_dev_restore+0x205/0x2a0 drivers/gpu/drm/drm_client_event.c:118 drm_lastclose drivers/gpu/drm/drm_file.c:408 [inline] drm_release+0x2c6/0x360 drivers/gpu/drm/drm_file.c:441 __fput+0x3ff/0xb50 fs/file_table.c:512 task_work_run+0x150/0x240 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:70 [inline] exit_to_user_mode_loop+0x1d8/0x6f0 kernel/entry/common.c:101 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] __do_fast_syscall_32+0x701/0x970 arch/x86/entry/syscall_32.c:310 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:332 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf703efec Code: Unable to access opcode bytes at 0xf703efc2. RSP: 002b:00000000ffb3591c EFLAGS: 00000202 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 000000000000001e RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 --- 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