From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f208.google.com (mail-oi1-f208.google.com [209.85.167.208]) (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 A40EF2F9D89 for ; Sat, 25 Jul 2026 22:42:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785019346; cv=none; b=OKeSwA8Jpz7cZX5OKWgOIbLYy2vJKg4BRXegDJ7UUHsKssWnwIskvanDNOVzrGRXZ6Wz/SfPOn+ZxZIy50JniOfyLfPBiLavux/sYK8QclMnxPzNlhsH1mgWcYd6Qw+eT7/vVElCQ73AOVAVJJ3qIdA8hqdSacFT7LkIoIGAQzs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785019346; c=relaxed/simple; bh=rFx1NqDvwEkg8RHAULrG99Ap+r/xpj458boxsinqlBA=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=kB9Hnj/ybIOAyPW7LE5Uhm4JGLp0lGnn1mY6f6ETrn5bcKxpz9bcjnqETwCPnjtN7ZFsUNdi6whxPux8Y0sgxlMiZyjqcT9iYma4+7gdrIYKLtSDkUjRAIoWvj/sqi4P/HbvPFCPbgnbMEsOd8ET3Vp8OwHeirTdV9AZ+FDh0kw= 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=209.85.167.208 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-f208.google.com with SMTP id 5614622812f47-49ab6a82cd5so2178407b6e.2 for ; Sat, 25 Jul 2026 15:42:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785019343; x=1785624143; 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=DlcQsbkqvSp6QzhWUuIl3Tb402t6QQSD+VXsiKCEL0U=; b=IfE/TxxCLcqSDu9Jqvn/pLcTUZFj6cl3+0IN6GbbqcglAo4qp6SfcKHBMjWslCeENe siq1FeeRLQvXVI+D03/G25WwbkuqBTSI7tmcOC9bPVQ+CvfkKcYrxpxKLEfmixnNx3eR kCDgTMYys9r4+PnVvwzaEMiEVMrV3Lu9FKZ/DYvYHeWllZ5xXc/X1y1r1aYkNhA85Pzf q8pyjW8Dn6CW5EUqikF4Sl6EMpKMtCua5NN5dIFBo4bRt5ilcYjdKJ4kp/cTn6nSE4J3 rRelAGk37q7HGkyLmUWefSvgQoDybFCXLeK6Lbbe5v+d07O08KRgExh6KUK2Oc9TBt6o 94kA== X-Gm-Message-State: AOJu0Yzjr18C4duXRHWjbMUaFSR77+d8iJrPtwc/shFXo2Btq/KzfA8D fcqomNgcw+7iJ5NyMZt1BDbeGCEoQZNdwKS+1VC++gL8q10m70rb6zdZwpq9vzX+VcalJ+n1la1 z/oHeg7K/eJxz0pfUB09LLhQXe+it8dfbCO/ni/9dY9JjmQHMWgsaB2876Xy7TQ== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:3197:b0:4a4:d2b:8e7a with SMTP id 5614622812f47-4ab6a35dba0mr3716127b6e.35.1785019343567; Sat, 25 Jul 2026 15:42:23 -0700 (PDT) Date: Sat, 25 Jul 2026 15:42:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a653bcf.073198cf.94f0f.001c.GAE@google.com> Subject: [syzbot] [kernel?] WARNING: proc registration bug in unregister_irq_proc (2) From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tglx@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 3dab139d4795 Merge tag 'rust-fixes-7.2-2' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=156bd88e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=690d666eb12fca6e1e61 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-3dab139d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2b5a401a9dc7/vmlinux-3dab139d.xz kernel image: https://storage.googleapis.com/syzbot-assets/7ed2d255bd44/bzImage-3dab139d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+690d666eb12fca6e1e61@syzkaller.appspotmail.com ------------[ cut here ]------------ remove_proc_entry: removing non-empty directory 'irq/20', leaking at least 'comedi_parport' WARNING: fs/proc/generic.c:747 at remove_proc_entry+0x4e7/0x610 fs/proc/generic.c:747, CPU#1: syz.3.389/7224 Modules linked in: CPU: 1 UID: 0 PID: 7224 Comm: syz.3.389 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:remove_proc_entry+0x4f5/0x610 fs/proc/generic.c:747 Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 c7 00 00 00 48 8d 3d e9 5f 6c 0e 49 8b 95 d0 00 00 00 48 c7 c6 40 00 ea 8b <67> 48 0f b9 3a e9 2a fe ff ff e8 0c ca 4d ff 48 8d 7d 18 48 b8 00 RSP: 0018:ffffc900054c7780 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffff88801c7a2e9c RDX: ffff88801c3a45dc RSI: ffffffff8bea0040 RDI: ffffffff9128f260 RBP: ffff88801c7a2e78 R08: ffff88803a22821c R09: ffffed10038f45bb R10: ffff88801c7a2ddb R11: 0000000000000000 R12: ffff88801c7a2dc0 R13: ffff88801c3a4500 R14: ffff88803a2281f8 R15: dffffc0000000000 FS: 00007fc0e43926c0(0000) GS:ffff8880d5ede000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000001000 CR3: 0000000058a9a000 CR4: 0000000000352ef0 Call Trace: unregister_irq_proc+0x206/0x2a0 kernel/irq/proc.c:406 free_desc+0x89/0x330 kernel/irq/irqdesc.c:482 irq_free_descs kernel/irq/irqdesc.c:874 [inline] irq_free_descs+0x84/0xc0 kernel/irq/irqdesc.c:865 irq_domain_free_irqs+0x46a/0x5c0 kernel/irq/irqdomain.c:1917 mp_unmap_irq+0xf8/0x130 arch/x86/kernel/apic/io_apic.c:1061 acpi_unregister_gsi_ioapic+0x40/0x60 arch/x86/kernel/acpi/boot.c:722 acpi_unregister_gsi+0x25/0x40 arch/x86/kernel/acpi/boot.c:751 acpi_pci_irq_disable+0x275/0x360 drivers/acpi/pci_irq.c:517 pcibios_disable_device arch/x86/pci/common.c:706 [inline] pcibios_disable_device+0x89/0xb0 arch/x86/pci/common.c:703 do_pci_disable_device+0x9f/0x100 drivers/pci/pci.c:2170 pci_disable_device+0x130/0x270 drivers/pci/pci.c:2206 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: 0033:0x7fc0e359de99 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:00007fc0e4392028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fc0e3825fa0 RCX: 00007fc0e359de99 RDX: 000000000000000c RSI: 0000200000001100 RDI: 0000000000000003 RBP: 00007fc0e3633eaf R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc0e3826038 R14: 00007fc0e3825fa0 R15: 00007ffe30698be8 ---------------- Code disassembly (best guess): 0: 00 fc add %bh,%ah 2: ff lcall (bad) 3: df 48 89 fisttps -0x77(%rax) 6: fa cli 7: 48 c1 ea 03 shr $0x3,%rdx b: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) f: 0f 85 c7 00 00 00 jne 0xdc 15: 48 8d 3d e9 5f 6c 0e lea 0xe6c5fe9(%rip),%rdi # 0xe6c6005 1c: 49 8b 95 d0 00 00 00 mov 0xd0(%r13),%rdx 23: 48 c7 c6 40 00 ea 8b mov $0xffffffff8bea0040,%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: e9 2a fe ff ff jmp 0xfffffe5e 34: e8 0c ca 4d ff call 0xff4dca45 39: 48 8d 7d 18 lea 0x18(%rbp),%rdi 3d: 48 rex.W 3e: b8 .byte 0xb8 --- 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