From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f207.google.com (mail-oi1-f207.google.com [209.85.167.207]) (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 3F4A317A2FB for ; Sat, 1 Aug 2026 00:02:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785542557; cv=none; b=t2/Yamx3WgSo2wNZbG4pLM+EO+7R9SL29p5SK49YBHH1xr0WZvkNFZgkLpWhe1NEGy4c9LQdKXKF7AR2b3AWYCuASNMtsinRQR85+8rJmHh0pNIEZnAJf6j8MkVjTyHwjZiH6mRSR6sd4oSBTQF172olg4xMzssh3pq5bK5+tLo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785542557; c=relaxed/simple; bh=p0nvq2pg4g1m9iEALvXxfHMdBIN3r9SFBRoA9XmZuVI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=A6XSyE3MMakeizWyV0EmG94/QZ8XhrsY6F7wvcDKS6dyaLRNFYgx3jTV7xaEIiWYD22O13O8k7BUxjid9/oJy/RpI57go6g+q2v4AktvWmV31IxU6jpNpeUezAZlbmWPTPT5FmN5qHWE7yrN9l8K+Qm2m5ExDUgN/lVCq/kK1tg= 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=209.85.167.207 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-f207.google.com with SMTP id 5614622812f47-4a36606e230so2001462b6e.2 for ; Fri, 31 Jul 2026 17:02:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785542554; x=1786147354; 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=ooV9V1hLPFUBNnjWINFU7u+kB9NOQ+rH4q05PzVcZcM=; b=J59iretGK5L1xbEXrOfqHFc5IsUfZUzuFY6AP8qZOQF8EUfOCYzl9JttbT4kIz4FHU YOJDv+k7dqRmY28My6c7+L7cdJ2joklr4XHoaur9EaLRei9CqaEHtCMNwXI6p0PG/Uxg yb03fYhPxitTj2vOcciDP4r2F/BUeq4Spp7C3fmD6UQtK5ZkJz2qy7cjYxnn22j3TFrN CRrKGwrEXPWrjWp4/dUDTTHEc7aT1vMkNqGaj9+frga//xjv0n4nZihdRrY2d9c2UMRc amoyvAV0XGXoy2gPTeYebpVholH0AZSIi2V6FAl9EnZBtOyAcvf8dsfVd828Pyjxq2gT 6Qug== X-Forwarded-Encrypted: i=1; AHgh+Ro0xUSTEPqGtDM2Ai85EecNL+UkVTZVBAm2MERGYyObKGPwpQg8rF8LQCwhGOdX1YmYXi4jClrHweY=@vger.kernel.org X-Gm-Message-State: AOJu0Yx0q9JYTtjbeqozh2Qh2YLk7qsV3FLkNW9McRyaqu4HVfuJNHIj Ggg5GweueLCtiwocFhi85b3vkp3jnpIYl+uCTTHPQDQapQRCgBk3rjmodsVcRNueY7KRxcDCa2D 7R1fLEAbi4dvB5eU8gkCUtUpZnhoogb89kSBIQMZKec+INAkGaq0kD4Jt+o0= Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:67c3:b0:495:eb9f:53c4 with SMTP id 5614622812f47-4af5e1f32aamr3902257b6e.9.1785542554330; Fri, 31 Jul 2026 17:02:34 -0700 (PDT) Date: Fri, 31 Jul 2026 17:02:34 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a6d379a.2d659fcc.1d46f5.01a8.GAE@google.com> Subject: [syzbot] [net?] [usb?] BUG: using smp_processor_id() in preemptible code in tx_complete From: syzbot To: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, oneukum@suse.com, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 11028ab62899 Merge tag 'probes-fixes-v7.2-rc5' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10cbd632580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=04cd90bb99c6ef81a65d 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-11028ab6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e2be78614a29/vmlinux-11028ab6.xz kernel image: https://storage.googleapis.com/syzbot-assets/301a11d315af/bzImage-11028ab6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+04cd90bb99c6ef81a65d@syzkaller.appspotmail.com BUG: using smp_processor_id() in preemptible [00000000] code: vhci_rx/6205 caller is tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 CPU: 0 UID: 0 PID: 6205 Comm: vhci_rx Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 check_preemption_disabled+0xd8/0xe0 lib/smp_processor_id.c:47 tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 __usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741 vhci_recv_ret_submit drivers/usb/usbip/vhci_rx.c:107 [inline] vhci_rx_pdu drivers/usb/usbip/vhci_rx.c:242 [inline] vhci_rx_loop+0x60e/0xa60 drivers/usb/usbip/vhci_rx.c:265 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 BUG: using smp_processor_id() in preemptible [00000000] code: vhci_rx/6205 caller is tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 CPU: 3 UID: 0 PID: 6205 Comm: vhci_rx Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 check_preemption_disabled+0xd8/0xe0 lib/smp_processor_id.c:47 tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 __usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741 vhci_recv_ret_submit drivers/usb/usbip/vhci_rx.c:107 [inline] vhci_rx_pdu drivers/usb/usbip/vhci_rx.c:242 [inline] vhci_rx_loop+0x60e/0xa60 drivers/usb/usbip/vhci_rx.c:265 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 BUG: using smp_processor_id() in preemptible [00000000] code: vhci_rx/6205 caller is tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 CPU: 1 UID: 0 PID: 6205 Comm: vhci_rx Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 check_preemption_disabled+0xd8/0xe0 lib/smp_processor_id.c:47 tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 __usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741 vhci_recv_ret_submit drivers/usb/usbip/vhci_rx.c:107 [inline] vhci_rx_pdu drivers/usb/usbip/vhci_rx.c:242 [inline] vhci_rx_loop+0x60e/0xa60 drivers/usb/usbip/vhci_rx.c:265 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 check_preemption_disabled: 7 callbacks suppressed BUG: using smp_processor_id() in preemptible [00000000] code: vhci_rx/6205 caller is tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 CPU: 0 UID: 0 PID: 6205 Comm: vhci_rx Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 check_preemption_disabled+0xd8/0xe0 lib/smp_processor_id.c:47 tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 __usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741 vhci_recv_ret_submit drivers/usb/usbip/vhci_rx.c:107 [inline] vhci_rx_pdu drivers/usb/usbip/vhci_rx.c:242 [inline] vhci_rx_loop+0x60e/0xa60 drivers/usb/usbip/vhci_rx.c:265 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 BUG: using smp_processor_id() in preemptible [00000000] code: vhci_rx/6205 caller is tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 CPU: 1 UID: 0 PID: 6205 Comm: vhci_rx Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 check_preemption_disabled+0xd8/0xe0 lib/smp_processor_id.c:47 tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 __usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741 vhci_recv_ret_submit drivers/usb/usbip/vhci_rx.c:107 [inline] vhci_rx_pdu drivers/usb/usbip/vhci_rx.c:242 [inline] vhci_rx_loop+0x60e/0xa60 drivers/usb/usbip/vhci_rx.c:265 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 BUG: using smp_processor_id() in preemptible [00000000] code: vhci_rx/6205 caller is tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 CPU: 1 UID: 0 PID: 6205 Comm: vhci_rx Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 check_preemption_disabled+0xd8/0xe0 lib/smp_processor_id.c:47 tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 __usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741 vhci_recv_ret_submit drivers/usb/usbip/vhci_rx.c:107 [inline] vhci_rx_pdu drivers/usb/usbip/vhci_rx.c:242 [inline] vhci_rx_loop+0x60e/0xa60 drivers/usb/usbip/vhci_rx.c:265 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 BUG: using smp_processor_id() in preemptible [00000000] code: vhci_rx/6205 caller is tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 CPU: 3 UID: 0 PID: 6205 Comm: vhci_rx Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 check_preemption_disabled+0xd8/0xe0 lib/smp_processor_id.c:47 tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 __usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741 vhci_recv_ret_submit drivers/usb/usbip/vhci_rx.c:107 [inline] vhci_rx_pdu drivers/usb/usbip/vhci_rx.c:242 [inline] vhci_rx_loop+0x60e/0xa60 drivers/usb/usbip/vhci_rx.c:265 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 BUG: using smp_processor_id() in preemptible [00000000] code: vhci_rx/6205 caller is tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 CPU: 3 UID: 0 PID: 6205 Comm: vhci_rx Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 check_preemption_disabled+0xd8/0xe0 lib/smp_processor_id.c:47 tx_complete+0x237/0x770 drivers/net/usb/usbnet.c:1301 __usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741 vhci_recv_ret_submit drivers/usb/usbip/vhci_rx.c:107 [inline] vhci_rx_pdu drivers/usb/usbip/vhci_rx.c:242 [inline] vhci_rx_loop+0x60e/0xa60 drivers/usb/usbip/vhci_rx.c:265 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 --- 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