From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi2-f1.google.com (mail-oi2-f1.google.com [74.125.231.193]) (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 6EB0641D21D for ; Fri, 21 Aug 2026 08:03:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.193 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787299438; cv=none; b=bF7FLjK/WKPdpKUqiFlUqDGwmX751pxKTr7eJPD982y058oD1LsY0p6zrZExuglLtcXWAHrhjx2qC7zHhiELXB3i6+y7fC4Lr6iaD673aAOtF4Jegs+tp9dEjfERhCYrSYP95/X8o8I7Ql/93vxFU+73k841EnLapRVG8CoC260= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787299438; c=relaxed/simple; bh=SC1V826d5rQ5UNHdYXdBUIidaS9ihlZ/agq6g+E5dsI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=oyMkgD717i7XLgvTjU68lXaGP6QsTMUka0fBZs41/wHMpXhn3EvdbzdgnWYC5gOZpXmbPbYwW+W/LmBY805BGUmudKWjTFZvDYu90ymZ9qRZuWxxZf3jr/adqRbieeZ+I33nD+ORZ+xvr0QJuhk7v/fZ00RZzbrZtoGKfcAkJnU= 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=74.125.231.193 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-oi2-f1.google.com with SMTP id 5614622812f47-4960b753d6fso275785b6e.0 for ; Fri, 21 Aug 2026 01:03:56 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787299435; x=1787904235; 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=AEYb6PmEIPOKrFbk1dO8B9Ev6hLrYRC4qxRczRoQl/s=; b=EbVyHEFjJjrnT1C7L2Ppzdba/u2UI4u9l053gwNaS/xYURfSzcDN8kXW+Qi/D/hdLf NycHSDx5Jg5z2UGQUzUFg2/EovwBWOyHysTSknGstGwZZVcq+ncbIEVSobtYo8ddvfns KP2ytUotLX4VBkX5utwDmkh3+cYfyTM9B6IKa+I5g2kCROegpkvTakqnNzSBjl2251fe /uSMOqQKSS3+l9szMA3I3IeMVrJt3XkoZZoop5kYnEPcTVMj622dEla5Yv1NvD/rfkJ1 +xtWBRDmQbUrSRdCrTY7mJAOtXxk8e2POFsBygS5O0WIfBQ74WEpmTR1ZXPbPHGGnE0A EBmA== X-Forwarded-Encrypted: i=1; AHgh+RpkZhh1s49sSAkzW1R1CBJY9k0sIgCaH8A5AEhNipZinATAV9QVMMK8xitmhxrdVLn3QLl+i31uTpj9PiU=@vger.kernel.org X-Gm-Message-State: AOJu0YxufVy01plpYswnxzvaBopFpXD49jzeC5Y8uOq43ako3x9LEOs2 7e55txJpWV0PSvJZ53yMSK8L7bwqwqCkteluem13wu0PYswc7niL9HcN8/0wtCxsC+0xY8vZ8gJ hB2Rtswh0HcTQ40Vh9EK2vvtxzlmoU5+fktoQvxYMUdcGjO67vt6+H9rblws= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:2f08:b0:4b2:8d89:6a40 with SMTP id 5614622812f47-4b2ef2c9cf7mr4717931b6e.7.1787299435386; Fri, 21 Aug 2026 01:03:55 -0700 (PDT) Date: Fri, 21 Aug 2026 01:03:55 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a88066b.ae6ddae5.3da009.002d.GAE@google.com> Subject: [syzbot] [usb?] general protection fault in vhci_hcd_probe From: syzbot To: gregkh@linuxfoundation.org, i@zenithal.me, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, shuah@kernel.org, syzkaller-bugs@googlegroups.com, valentina.manea.m@gmail.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 4477a78374a5 Add linux-next specific files for 20260814 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12bed6c6580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9b32a36dd637b06f dashboard link: https://syzkaller.appspot.com/bug?extid=7300affe388249d66dfe compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11e03a79580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/994c1c8c560e/disk-4477a783.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/cd54543d69ae/vmlinux-4477a783.xz kernel image: https://storage.googleapis.com/syzbot-assets/407cdf8f3fc2/bzImage-4477a783.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7300affe388249d66dfe@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 5839 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:vhci_hcd_probe+0x47/0x3e0 drivers/usb/usbip/vhci_hcd.c:1367 Code: ff 0b eb f9 49 8d 9e 80 00 00 00 48 89 d8 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 33 86 59 fa 48 8b 1b 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 08 48 89 df e8 1b 86 59 fa 4c 8b 23 48 c7 c0 20 e5 RSP: 0018:ffffc9000397fac0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88802a031f40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801c76c000 RBP: dffffc0000000000 R08: ffff88802a6f9873 R09: 1ffff110054df30e R10: dffffc0000000000 R11: ffffffff87dcb110 R12: ffff88801c76c000 R13: ffffffff8fc690a0 R14: ffff88801c76c000 R15: ffffffff87dcb110 FS: 000055556104d500(0000) GS:ffff888124df8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe52c870000 CR3: 0000000075d5a000 CR4: 00000000003526f0 Call Trace: platform_probe+0xf9/0x190 drivers/base/platform.c:1507 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 device_driver_attach+0xe0/0x1d0 drivers/base/dd.c:1203 bind_store+0x1d0/0x220 drivers/base/bus.c:267 kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x612/0xba0 fs/read_write.c:687 ksys_write+0x150/0x270 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe52c99e0d9 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:00007ffc9f637838 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fe52cc25fa0 RCX: 00007fe52c99e0d9 RDX: 0000000000000006 RSI: 00002000000000c0 RDI: 0000000000000004 RBP: 00007fe52ca35024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe52cc25fac R14: 00007fe52cc25fa0 R15: 00007fe52cc25fa0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vhci_hcd_probe+0x47/0x3e0 drivers/usb/usbip/vhci_hcd.c:1367 Code: ff 0b eb f9 49 8d 9e 80 00 00 00 48 89 d8 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 33 86 59 fa 48 8b 1b 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 08 48 89 df e8 1b 86 59 fa 4c 8b 23 48 c7 c0 20 e5 RSP: 0018:ffffc9000397fac0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88802a031f40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801c76c000 RBP: dffffc0000000000 R08: ffff88802a6f9873 R09: 1ffff110054df30e R10: dffffc0000000000 R11: ffffffff87dcb110 R12: ffff88801c76c000 R13: ffffffff8fc690a0 R14: ffff88801c76c000 R15: ffffffff87dcb110 FS: 000055556104d500(0000) GS:ffff888124df8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe52c870000 CR3: 0000000075d5a000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: ff 0b decl (%rbx) 2: eb f9 jmp 0xfffffffd 4: 49 8d 9e 80 00 00 00 lea 0x80(%r14),%rbx b: 48 89 d8 mov %rbx,%rax e: 48 c1 e8 03 shr $0x3,%rax 12: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) 16: 74 08 je 0x20 18: 48 89 df mov %rbx,%rdi 1b: e8 33 86 59 fa call 0xfa598653 20: 48 8b 1b mov (%rbx),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 df mov %rbx,%rdi 33: e8 1b 86 59 fa call 0xfa598653 38: 4c 8b 23 mov (%rbx),%r12 3b: 48 rex.W 3c: c7 .byte 0xc7 3d: c0 20 e5 shlb $0xe5,(%rax) --- 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