From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f71.google.com (mail-ot1-f71.google.com [209.85.210.71]) (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 9172143C056 for ; Thu, 27 Aug 2026 09:47:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787824057; cv=none; b=FPvjlZTMln5+TzBp3fUP3JjbqsxZBUYvsnRnrXv5Zr8z8TkwQaWFXZk1QCIdisOrIB545DydwnzMVzxG/WhkKAlYxJrNrkXkbjwYzqfHoFERW0JwlOxys+DJ/87k6bPInJR2XLesIKietNgxTsRbDPdIf4UO9yYn3sU0h7uU8ts= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787824057; c=relaxed/simple; bh=tk3Ai/Jo2XGI9xcsIXzPCRSuWSXRRpdmIHLsH363YZg=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=sZmyiHtYFSv/RKd+HzDcXy/iE+BuWm7WJuPs01cd4VSD5VSeyzh2iKYGAIcAVYJeuI3dkYFrocFMqtfXoMQtqjy8AOp5XkI3FMVIK15BEg0FjvrNVGuY4PR7AjDEX3OhjptJy/UMWB6rZpWwgxW6GgYaAXeZBA3ztN/vURisw0Q= 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=209.85.210.71 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-ot1-f71.google.com with SMTP id 46e09a7af769-7eb6429750eso3495177a34.0 for ; Thu, 27 Aug 2026 02:47:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787824051; x=1788428851; 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=YflxLRauQaVc21/roAiOh/raFm7Kh6g8H2z5rAAAdkQ=; b=Ui860WQoBMikJH1Ih+boT568HovFO3Cu7r8xh9m7JDXMRJYrdK969NjE7DrDxNyhcO IkhcMrbWR4OjyXGxwlWoQe3LaLUn/HpvxIu5CgDzp8xD0ZOPZhOVOMMcyogCvn+ekSRi 45w7/1Z4b6AWpf97A783CVnxBuWH5tRr6iDyRUa6K1Pi34kAqN48DLwr+iHpkgD5WfJ7 Tx42s5tFM4td1fGAHVQVsYkBcaZH5frIjMjz0UHATKI/XyrWyTnPfrW11quX5Mwdoxpo awUSAXJYDuDWD64RrFN0TMVU/zQ3YxQWb9ts99yJs44RwXSHU3Gi7HpkTRRyjdOG4G2R sCMg== X-Forwarded-Encrypted: i=1; AHgh+RrRzqAYzRuzrNdSb9maqX4ct3AFrRx+Oi1aQi/h7nE3xBKVXJYAskSa04yOFRwOCVvyIAe59BEkoddJRA==@vger.kernel.org X-Gm-Message-State: AFuF++mvPJcBQ1Y6m2flvxdFlMNGJMM+JJjYKGgMXB237ZhSYsja1+FH CAgoS8g9YKVRFUkBDukhABa1a/5TJkCmAR86AeuPVqiOhtwUtgqt6iuFTpumYXO6hupmBK5oM47 nGtoNzrXtnTECTwrIcSpZrpvqFdFStbtvq2xQbMpNtGLmJtF73M61LmmcRT8= Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:ded8:0:b0:6ac:b178:97f9 with SMTP id 006d021491bc7-6b1a0529045mr10823866eaf.31.1787824051711; Thu, 27 Aug 2026 02:47:31 -0700 (PDT) Date: Thu, 27 Aug 2026 02:47:31 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a9007b3.1d9ded08.62e62.00cd.GAE@google.com> Subject: [syzbot] [sound?] BUG: unable to handle kernel NULL pointer dereference in snd_ctl_led_get From: syzbot To: linux-kernel@vger.kernel.org, linux-sound@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 818bebeb63dd drm/xe: Don't hand out the flat CCS storage a.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=12a3d579580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ccca94d2c01b9e78 dashboard link: https://syzkaller.appspot.com/bug?extid=b7fe2760ea6f1ee44b4d compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=178bb415580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b7fe2760ea6f1ee44b4d@syzkaller.appspotmail.com BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 0 P4D 0 Oops: Oops: 0010 [#1] SMP KASAN NOPTI CPU: 2 UID: 0 PID: 6042 Comm: syz-executor129 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: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc900034b7948 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88802e2ff400 RCX: 0000000000000000 RDX: 1ffff11005c5fe8c RSI: ffffffff9bda4620 RDI: ffff88802e2ff400 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff9bda4620 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff90b73bc8 R14: ffff88802e2ff400 R15: ffffffff90b73bc8 FS: 000055555669f400(0000) GS:ffff8880d5da2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000027234000 CR4: 0000000000352ef0 Call Trace: snd_ctl_led_get+0x231/0x430 sound/core/control_led.c:122 snd_ctl_led_set_state+0x5c1/0x7f0 sound/core/control_led.c:168 snd_ctl_led_notify+0x15b/0x1e0 sound/core/control_led.c:239 snd_ctl_led_set_id sound/core/control_led.c:268 [inline] set_led_id+0xb0f/0xe80 sound/core/control_led.c:557 dev_attr_store+0x58/0x80 drivers/base/core.c:2509 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: 0033:0x7fa7e64de2b7 Code: 48 89 fa 4c 89 df e8 98 1d 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff RSP: 002b:00007ffe15525110 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000055555669f400 RCX: 00007fa7e64de2b7 RDX: 0000000000000002 RSI: 00007ffe155251a0 RDI: 0000000000000004 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe155251a0 R13: 00007fa7e6517024 R14: 00007fa7e6541cc0 R15: 0000000000000002 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc900034b7948 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88802e2ff400 RCX: 0000000000000000 RDX: 1ffff11005c5fe8c RSI: ffffffff9bda4620 RDI: ffff88802e2ff400 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff9bda4620 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff90b73bc8 R14: ffff88802e2ff400 R15: ffffffff90b73bc8 FS: 000055555669f400(0000) GS:ffff8880d5da2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000027234000 CR4: 0000000000352ef0 --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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