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 ECE713806CA for ; Sat, 1 Aug 2026 00:45:24 +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=1785545128; cv=none; b=nCUWKTVCXu4dA+lrIqMWCwy02ZLZl90Wt5h0bCwYRoftUupPQUxH8qP1bpo171/I683gfF+eXRjz4Y8zX3Ga5QHiOjj6YtXutZrD4Hx+ZQNW3zmSFAVZPGlsNZA/OYnO2J5IE3FvEIXtYlfvnE0M5QEUOM3O++YkU1+JE7YPx3E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785545128; c=relaxed/simple; bh=LNfq9aoJgtwPj36TAg+ZRPDUWnkFHdi8z1vkuUHoFbE=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=JcpIzfwcSuO2xUHE3tPdjXkjv3ceZlOYom1zVSqpvKvu3smBD91zEFc0xQwpuqE1HZmkWgwa+AcE2Mv4xWUZotjpKNcbbV7+g7aB9K7QuqHh6Unp5GRi4jnOe0FHMfutw0u1RiBowy9CZqFBNlW2QFup3REq70DfjNliUl7b/sY= 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 5614622812f47-48576b535b6so886607b6e.2 for ; Fri, 31 Jul 2026 17:45:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785545123; x=1786149923; 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=Q8vmeMP/RpI8sx/Cn/QAEYbKX3MZkH0hFRUyB+kPLME=; b=XU+sTeyvJZNNhMU3naPEsmKe1JjAAtMIxDXT5BcDqxHcEFtr/kw+NHoGcY6/+w24hB wFdtHhZID0qOlHzW7Ec+VvGafVNTi/NvEVQ8rULp5QLMQy2ffF2TH4ubI4rA3kg6pUSw snHVA5qFAIe6aCiDcn5N1T25Pq1YHZIaH08orT04sr0QfHBkcpG8xucyNxvOK2mSYnh0 bcoJ0j8buHcVGzRrGT75OqGZGO6JrHkGFLkE7v0DgEqLVpVNS5vA+ShJyG3DrkJtuJhX jTxZ6nAMzPvw0Mmr/PaKhPAiZz8F44U8ScHakwcTi78S1th2Q2JeBAtXtUAtBdIh3IkG spTQ== X-Forwarded-Encrypted: i=1; AHgh+RqcZrBwNVYerxIzZ9whnc97F0DimF+RTWo/GkYhAW1lQcqAjPoCING8JLS68ZtKbd+eIf1RSDHv+l8=@vger.kernel.org X-Gm-Message-State: AOJu0Yy2eZ1fxTXV3rgC0xHJh0CmwEsTozVKjFyuGImfzw1gNQEj456w R21sD+TDnQHEDqNWEHNmbr4GYz/A22g46R4Dv0tnkNJV/ueRQDGd2tq8Se3KcrQiuw0fZ9UgrXN fvTJXcqj8NgYE/1UZPc/c2uSjAGTfuU3A4zCWR6mNptTAmpS6LvT2y9SMR/0= 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:c1e8:b0:497:d371:21c8 with SMTP id 5614622812f47-4af5e2cd936mr3876312b6e.19.1785545123221; Fri, 31 Jul 2026 17:45:23 -0700 (PDT) Date: Fri, 31 Jul 2026 17:45:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a6d41a3.f794c993.27aeb.000e.GAE@google.com> Subject: [syzbot] [media?] [usb?] WARNING in ttusb_dec_send_command From: syzbot To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-usb@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 5d5fd841c346 Merge 7.2-rc5 into usb-next git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=14114e32580000 kernel config: https://syzkaller.appspot.com/x/.config?x=6ec4d592e55f7960 dashboard link: https://syzkaller.appspot.com/bug?extid=ac9880be0b0b1a5f54d6 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=127da5b9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16c6f8c6580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2ed536ae4daf/disk-5d5fd841.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ab40098ccbf1/vmlinux-5d5fd841.xz kernel image: https://storage.googleapis.com/syzbot-assets/66d5c395f47c/bzImage-5d5fd841.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ac9880be0b0b1a5f54d6@syzkaller.appspotmail.com usb 4-1: config 1 interface 0 altsetting 0 has 2 endpoint descriptors, different from the interface descriptor's value: 5 usb 4-1: New USB device found, idVendor=0b48, idProduct=1008, bcdDevice= 1.00 usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 ------------[ cut here ]------------ memcpy: detected buffer overflow: 75 byte read of buffer size 60 WARNING: lib/string_helpers.c:1036 at __fortify_report+0x8d/0xd0 lib/string_helpers.c:1036, CPU#0: kworker/0:1/11 Modules linked in: CPU: 0 UID: 0 PID: 11 Comm: kworker/0:1 Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:__fortify_report+0x99/0xd0 lib/string_helpers.c:1036 Code: ad 31 dc fe 45 84 f6 48 c7 c0 20 ec b0 87 48 0f 44 e8 e8 8a 37 dc fe 48 8d 3d 93 b9 20 08 4d 89 e8 48 89 e9 4c 89 e2 48 89 de <67> 48 0f b9 3a 5b 5d 41 5c 41 5d 41 5e e9 85 3a a7 04 48 89 de 48 RSP: 0018:ffffc900000bece8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffffff87b0f7c0 RCX: ffffffff87b0ec20 RDX: 000000000000004b RSI: ffffffff87b0f7c0 RDI: ffffffff8af88650 RBP: ffffffff87b0ec20 R08: 000000000000003c R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff81595b4a R12: 000000000000004b R13: 000000000000003c R14: 0000000000000000 R15: 1ffff92000017dac FS: 0000000000000000(0000) GS:ffff888268636000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d73a1cbc10 CR3: 0000000118014000 CR4: 00000000003506f0 Call Trace: __fortify_panic+0x23/0x26 lib/string_helpers.c:1043 fortify_memcpy_chk include/linux/fortify-string.h:549 [inline] ttusb_dec_send_command.cold+0x75/0xf8 drivers/media/usb/ttusb-dec/ttusb_dec.c:372 ttusb_dec_get_stb_state drivers/media/usb/ttusb-dec/ttusb_dec.c:392 [inline] ttusb_dec_init_stb drivers/media/usb/ttusb-dec/ttusb_dec.c:1413 [inline] ttusb_dec_probe+0x8b4/0x2110 drivers/media/usb/ttusb-dec/ttusb_dec.c:1671 usb_probe_interface+0x386/0x9b0 drivers/usb/core/driver.c:399 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x64/0x160 drivers/base/bus.c:620 device_add+0x121d/0x1970 drivers/base/core.c:3772 usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x64/0x160 drivers/base/bus.c:620 device_add+0x121d/0x1970 drivers/base/core.c:3772 usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2700 hub_port_connect drivers/usb/core/hub.c:5572 [inline] hub_port_connect_change drivers/usb/core/hub.c:5712 [inline] port_event drivers/usb/core/hub.c:5876 [inline] hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5958 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+0x69a/0xc80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: ad lods %ds:(%rsi),%eax 1: 31 dc xor %ebx,%esp 3: fe 45 84 incb -0x7c(%rbp) 6: f6 48 c7 c0 testb $0xc0,-0x39(%rax) a: 20 ec and %ch,%ah c: b0 87 mov $0x87,%al e: 48 0f 44 e8 cmove %rax,%rbp 12: e8 8a 37 dc fe call 0xfedc37a1 17: 48 8d 3d 93 b9 20 08 lea 0x820b993(%rip),%rdi # 0x820b9b1 1e: 4d 89 e8 mov %r13,%r8 21: 48 89 e9 mov %rbp,%rcx 24: 4c 89 e2 mov %r12,%rdx 27: 48 89 de mov %rbx,%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 5b pop %rbx 30: 5d pop %rbp 31: 41 5c pop %r12 33: 41 5d pop %r13 35: 41 5e pop %r14 37: e9 85 3a a7 04 jmp 0x4a73ac1 3c: 48 89 de mov %rbx,%rsi 3f: 48 rex.W --- 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