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AHgh+RqtpObU3+DmvhLfzdufOyHlAtM/tk5GB26bqNE8JmwvX8JvNgrm9G4sLm7BW4B2FLxXfV6TkGWPng4AqA==@vger.kernel.org X-Gm-Message-State: AOJu0YxdMKl7qL8eYmaQL5Su87hp7iksIh6VyYXkZ/H8A/cgPC4j3pwk 2xXmD4bhf5fR9fUAIoMjJoMVME2G3EN5PTjG9MZVdJljyXGvDJf8zHyXcGcxyNP+6Ibwyg1daot FSHj0bKG8e911R/ogfqIUdj4+fWhb4jn4goGKJQwPEwfmLxifugDKq1CwkTQ= Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:3089:b0:6ac:b9d7:2173 with SMTP id 006d021491bc7-6ae96c84877mr5951252eaf.12.1785969807308; Wed, 05 Aug 2026 15:43:27 -0700 (PDT) Date: Wed, 05 Aug 2026 15:43:27 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a73bc8f.5aeeccc9.207e63.0002.GAE@google.com> Subject: [syzbot] [sound?] BUG: unable to handle kernel paging request in azx_probe_work From: syzbot To: linux-kernel@vger.kernel.org, linux-sound@vger.kernel.org, perex@perex.cz, syzkaller-bugs@googlegroups.com, tiwai@suse.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 848acc8ffe1b Merge tag 'fsverity-for-linus' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14d38bb9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=5ebe7cd17e48b4293660 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1671be32580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12d38bb9580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-848acc8f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6fb497cc0c8d/vmlinux-848acc8f.xz kernel image: https://storage.googleapis.com/syzbot-assets/663ccee34982/bzImage-848acc8f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5ebe7cd17e48b4293660@syzkaller.appspotmail.com BUG: unable to handle page fault for address: 000000000001c0a0 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 5806 Comm: kworker/1:4 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 Workqueue: events azx_probe_work RIP: 0010:readw arch/x86/include/asm/io.h:58 [inline] RIP: 0010:snd_hdac_reg_readw include/sound/hdaudio.h:458 [inline] RIP: 0010:azx_first_init sound/hda/controllers/intel.c:1953 [inline] RIP: 0010:azx_probe_continue sound/hda/controllers/intel.c:2365 [inline] RIP: 0010:azx_probe_work+0xa44/0x2640 sound/hda/controllers/intel.c:1737 Code: 4c 89 f7 e8 9e 3a dd fb 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 61 1a 00 00 48 8b 85 68 f7 ff ff <66> 44 8b 28 45 89 ef 0f 1f 44 00 00 e8 7b 9e 8a f8 48 8b 54 24 40 RSP: 0018:ffffc90003137b00 EFLAGS: 00010246 RAX: 000000000001c0a0 RBX: ffff88802d5d8058 RCX: 0000000000000000 RDX: 1ffff11005abb00b RSI: ffffffff855cfff2 RDI: 0000000000000001 RBP: ffff88802d5d88f0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88802e0b04c4 R14: ffff888022f3c000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880d5ed8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000001c0a0 CR3: 000000003f65b000 CR4: 0000000000352ef0 Call Trace: process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: CR2: 000000000001c0a0 ---[ end trace 0000000000000000 ]--- RIP: 0010:readw arch/x86/include/asm/io.h:58 [inline] RIP: 0010:snd_hdac_reg_readw include/sound/hdaudio.h:458 [inline] RIP: 0010:azx_first_init sound/hda/controllers/intel.c:1953 [inline] RIP: 0010:azx_probe_continue sound/hda/controllers/intel.c:2365 [inline] RIP: 0010:azx_probe_work+0xa44/0x2640 sound/hda/controllers/intel.c:1737 Code: 4c 89 f7 e8 9e 3a dd fb 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 61 1a 00 00 48 8b 85 68 f7 ff ff <66> 44 8b 28 45 89 ef 0f 1f 44 00 00 e8 7b 9e 8a f8 48 8b 54 24 40 RSP: 0018:ffffc90003137b00 EFLAGS: 00010246 RAX: 000000000001c0a0 RBX: ffff88802d5d8058 RCX: 0000000000000000 RDX: 1ffff11005abb00b RSI: ffffffff855cfff2 RDI: 0000000000000001 RBP: ffff88802d5d88f0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88802e0b04c4 R14: ffff888022f3c000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880d5ed8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000001c0a0 CR3: 000000003f65b000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 4c 89 f7 mov %r14,%rdi 3: e8 9e 3a dd fb call 0xfbdd3aa6 8: 48 89 da mov %rbx,%rdx b: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 12: fc ff df 15: 48 c1 ea 03 shr $0x3,%rdx 19: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 1d: 0f 85 61 1a 00 00 jne 0x1a84 23: 48 8b 85 68 f7 ff ff mov -0x898(%rbp),%rax * 2a: 66 44 8b 28 mov (%rax),%r13w <-- trapping instruction 2e: 45 89 ef mov %r13d,%r15d 31: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 36: e8 7b 9e 8a f8 call 0xf88a9eb6 3b: 48 8b 54 24 40 mov 0x40(%rsp),%rdx --- 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