From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f77.google.com (mail-oa1-f77.google.com [209.85.160.77]) (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 2911553E0B for ; Fri, 31 Jul 2026 00:12:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785456745; cv=none; b=DyMsX56NqwwCaFESjNFHJhWLGYEfB+hIS7RLKkvNys1nIUZqnDDI7oPUBeirdn1MFL/x0qsRHB0lfYgIeZocRh07Wxbh3KB1SdjkFNWvFey2QeLE96XPVQrSHHqS0M5e24F4svHHdRssCI3jieIoCo2yqLD016uelfEjTVeoggc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785456745; c=relaxed/simple; bh=KDq/LQpEVS2BHdj/0mB3etabY03A+q0vpIqHg665zSY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=j07sZifcCihbaktv8oLP5yDCCv5MnLpScjx4D7dEiabElgeTVop7YWjTYIHBb5WzG4NPPmc6Cm+RKFViXyRiBvquqf/AlXgGiYjQZU5UVDMfjtBTzWoRLGQ5NhY77K6wBOX19pVhz59WHeMJpcvTIJBNhqAV1n+7g0qg3O4MB4k= 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=209.85.160.77 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-oa1-f77.google.com with SMTP id 586e51a60fabf-448d5182870so566749fac.1 for ; Thu, 30 Jul 2026 17:12:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785456743; x=1786061543; 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=RDq6JYa2ofZsKzAfF3NcFAEtrlIkbZCnT/5jRnzQ/98=; b=aYsrjqE6SvTuTlJYx3zOJD+R1q4xLrS6lEzjQHINdsEryzMolz5c7Dx0BsNYSY0AJR rTa29Y5frG7szFwIxQ/Tw6V9RNslryFlhbKcp0+1G9APFib+v+cTG58tA3lLiqR+w5JV 9zqg4K0AFtwbKx2C8TLwxFTC+17er1zjrBiA2D2BWF8/zrUhmMMHkxlzEoZIY9RKhwF3 sPqDmQiJMh1++f5V5u+e7UhUtLauHuHravN17BBrSNEay3Lemrxvq6SfptLJDGgkMjZt 5GkbrhO1/inK+njVwnchx4B9t1xXln57qn28x2kMeQkvHM3I+i4cmEO1UfTA5ovYPbeS PyAg== X-Forwarded-Encrypted: i=1; AHgh+RplLNfU/ya1HCmtr5zOikpZH9jcGlcHDRDfJmfmioslHNxzoqg3uy3cMNmg8kIIxrvBn6BXZ3igB70=@vger.kernel.org X-Gm-Message-State: AOJu0Yy+HduUFbgoMZWfglZpg3hlF6iOFa6lKCwTqrVgC2IZWm2pb6Xi f+40Wbya1wL5YPl1H3hSSgB83GgQCd7bwTqM+twxvTQI0zmPjewiCNN2PtGlyjsKYpAvxXIddVk WTP+zIiGoyBiYQrHlS1eDTe/yNo1lO78rmhX4gdiqWB0G4kqtFzeeXnjW1hs= Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:3089:b0:497:d0ea:7dad with SMTP id 5614622812f47-4ad952c5da0mr2373910b6e.22.1785456743063; Thu, 30 Jul 2026 17:12:23 -0700 (PDT) Date: Thu, 30 Jul 2026 17:12:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a6be867.77639fcc.3d4fd0.0015.GAE@google.com> Subject: [syzbot] [usb?] WARNING in usbg_make_tpg From: syzbot To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, 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=1013b8c6580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c05be6c9b0d36cb9 dashboard link: https://syzkaller.appspot.com/bug?extid=2f343b3fdaa0a1c5d9c8 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 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/511647651d7f/vmlinux-11028ab6.xz kernel image: https://storage.googleapis.com/syzbot-assets/1c76180d0109/bzImage-11028ab6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2f343b3fdaa0a1c5d9c8@syzkaller.appspotmail.com ------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(lock->magic != lock) WARNING: kernel/locking/mutex.c:625 at __mutex_lock_common kernel/locking/mutex.c:625 [inline], CPU#0: syz.0.0/5324 WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0x12d8/0x1550 kernel/locking/mutex.c:821, CPU#0: syz.0.0/5324 Modules linked in: CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 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:__mutex_lock_common kernel/locking/mutex.c:625 [inline] RIP: 0010:__mutex_lock+0x12df/0x1550 kernel/locking/mutex.c:821 Code: ea 57 90 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 47 02 00 00 83 3d a5 58 83 04 00 75 13 48 8d 3d 08 a8 86 04 48 c7 c6 40 f7 ec 8b <67> 48 0f b9 3a 90 e9 75 ee ff ff 90 0f 0b 90 e9 48 f2 ff ff 90 0f RSP: 0018:ffffc9000dc97980 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000100000 RDX: ffffc90020001000 RSI: ffffffff8becf740 RDI: ffffffff905b39b0 RBP: ffffc9000dc97b10 R08: ffffffff9057ea43 R09: 1ffffffff20afd48 R10: dffffc0000000000 R11: fffffbfff20afd49 R12: ffff88803fd8e0b8 R13: 0000000000000000 R14: 1ffff92001b92f44 R15: 0000000000000000 FS: 00007f84c61dd6c0(0000) GS:ffff88808c543000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f84c55f26b8 CR3: 000000001fa0b000 CR4: 0000000000352ef0 Call Trace: usbg_make_tpg+0x147/0x590 drivers/usb/gadget/function/f_tcm.c:1678 target_fabric_make_tpg+0xa8/0x6d0 drivers/target/target_core_fabric_configfs.c:939 configfs_mkdir+0x4f6/0x9e0 fs/configfs/dir.c:1360 vfs_mkdir+0x406/0x620 fs/namei.c:5276 filename_mkdirat+0x285/0x510 fs/namei.c:5309 __do_sys_mkdir fs/namei.c:5336 [inline] __se_sys_mkdir+0x34/0x150 fs/namei.c:5333 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f84c539df99 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:00007f84c61dcfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007f84c5626090 RCX: 00007f84c539df99 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000600 RBP: 00007f84c5434ec4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f84c5626128 R14: 00007f84c5626090 R15: 00007ffe8ee4d1e8 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 57 push %rdi 1: 90 nop 2: 48 c1 e8 03 shr $0x3,%rax 6: 0f b6 04 18 movzbl (%rax,%rbx,1),%eax a: 84 c0 test %al,%al c: 0f 85 47 02 00 00 jne 0x259 12: 83 3d a5 58 83 04 00 cmpl $0x0,0x48358a5(%rip) # 0x48358be 19: 75 13 jne 0x2e 1b: 48 8d 3d 08 a8 86 04 lea 0x486a808(%rip),%rdi # 0x486a82a 22: 48 c7 c6 40 f7 ec 8b mov $0xffffffff8becf740,%rsi * 29: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2e: 90 nop 2f: e9 75 ee ff ff jmp 0xffffeea9 34: 90 nop 35: 0f 0b ud2 37: 90 nop 38: e9 48 f2 ff ff jmp 0xfffff285 3d: 90 nop 3e: 0f .byte 0xf --- 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