From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f197.google.com (mail-oi1-f197.google.com [209.85.167.197]) (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 ABDF7348C6B for ; Wed, 30 Sep 2026 19:23:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790796206; cv=none; b=FEm4SmA6+6EHIe0kGJCWJ3N9w26JIXGsgDNGEjqusHyfuGc0Us+1B5REuGSixNmxddYvZRVR7q6B2dJKL9sfVq5DVzg8mdz2BmstBJGkNoxrzwIu4lxWhj4Ga2zhsLl26G26nBNR/DDSpU+C6mihHYj3H1KCke3F5Ef+cLtvmbY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790796206; c=relaxed/simple; bh=uJ8EtuEK905+Gi23qPeV9TGepWx/mAogCtFhhB1gBt4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=IRJ7FYiGmkHprB3C4MpYigCUm4jHIFKaRk5RXvUrt1YEAGzoR2rdexl+1lq0nVRWWCD4Q4h2Era03R7RPlMCLO6XKY6hf3k/c5ld5oP+e6rcGwS309/KbQGautBW1CdKnByhsTBvcxs+J/7+ectNWU0MxjVTavJtgnNfCHaO0Qw= 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=209.85.167.197 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-f197.google.com with SMTP id 5614622812f47-4cbf700ddccso5846274b6e.0 for ; Wed, 30 Sep 2026 12:23:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790796203; x=1791401003; 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=Vu33goty3w6qMJWGH8JjwHxD7w/swbfgGOmcqaO0bYg=; b=wCZPgKUGzb+ATi+TwyemvKSZbdKC/xgCUIo97HdRA2ERjWg+bUzMB7rZ09EA6Q+PHw ogfCI3grjKt+nLNFhi+eOXDU5OEr3tTpIa3nOHaKpBSnJKbDHTAT8s/Gpk6zO8ABR+/T hwiUycUlda43jqyH06JGV0ssTYQkJkeHE/mOBnhzVuMBXsINOctOJ8SYnUcVDtsFzL+r T7zfhFwoHTTamVPfr5FHle0pho83AWfImkZwPskwCzv09/XCorciaDoCP9hie6zR1uA/ fLZKCDaPULF0qaumOQUg2GLlH9BSQHocdbcxG6ZCvZ9ramIvKxnxkndCsSo/jHgLY4+p eH6A== X-Gm-Message-State: AFuF++ks4s9Zb0AqWkxuIrhsOZnVUuMCe77XWmQuWTeATYsUree9pghW Ha+ih2rYBrCsNzSTclouuwWbePy69RwWzWODOWoqW6qHyMUjIljllAPVlCGHnh2A+Gj5vV2WiNz GK5EgC/BOj5BK4w9rKKtvHFc0mtVABV8pgjUaLYLNrTQ1ibcKGK+zQF66Gt0= 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:f0a:b0:4d6:90f3:74b4 with SMTP id 5614622812f47-4f1b7dfcb10mr2831827b6e.52.1790796203482; Wed, 30 Sep 2026 12:23:23 -0700 (PDT) Date: Wed, 30 Sep 2026 12:23:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6abd61ab.9eb00033.20dcce.0004.GAE@google.com> Subject: [syzbot] [media?] general protection fault in mxl111sf_ep4_streaming_ctrl From: syzbot To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 551c722f4080 Merge tag 'rtc-7.3-fixes' of git://git.kernel.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=10a37b25580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9d4242cb1c54cdf7 dashboard link: https://syzkaller.appspot.com/bug?extid=3df044e20e6ff1fb3cf5 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14f983f5580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3df044e20e6ff1fb3cf5@syzkaller.appspotmail.com usb 3-1: dvb_usb_v2: could not submit urb no. 0 - get them all back Oops: general protection fault, probably for non-canonical address 0xdffffc0000000061: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000308-0x000000000000030f] CPU: 1 UID: 0 PID: 5922 Comm: syz-executor559 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:mxl111sf_ep4_streaming_ctrl+0x2c/0x1a0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:399 Code: 1e fa 55 41 57 41 56 53 89 f3 49 89 fe 49 bf 00 00 00 00 00 fc ff df e8 02 5e 93 f9 49 81 c6 08 03 00 00 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 25 61 03 fa 4d 8b 36 49 83 c6 38 RSP: 0018:ffffc90002fc7b38 EFLAGS: 00010202 RAX: 0000000000000061 RBX: 0000000000000001 RCX: ffff88807ceb8000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90002fc7c38 R08: ffffc90002fc7647 R09: 1ffff920005f8ec8 R10: dffffc0000000000 R11: ffffffff88348d10 R12: dffffc0000000000 R13: ffff88805a6753b8 R14: 0000000000000308 R15: dffffc0000000000 FS: 00007f91525696c0(0000) GS:ffff888124dc8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f09f0cd1140 CR3: 000000002f2ca000 CR4: 00000000003526f0 Call Trace: dvb_usb_start_feed+0x57a/0xc70 drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:308 dmx_ts_feed_start_filtering+0x129/0x220 drivers/media/dvb-core/dvb_demux.c:747 dvb_dmxdev_start_feed drivers/media/dvb-core/dmxdev.c:658 [inline] dvb_dmxdev_filter_start+0x434/0x10d0 drivers/media/dvb-core/dmxdev.c:769 dvb_demux_do_ioctl+0x48b/0x540 drivers/media/dvb-core/dmxdev.c:1099 dvb_usercopy+0x199/0x2e0 drivers/media/dvb-core/dvbdev.c:996 dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1208 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 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: 0033:0x7f9153da4a8b Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00 RSP: 002b:00007f9152569060 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f9153da4a8b RDX: 00007f91525690d0 RSI: 0000000040146f2c RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f91525690f0 R13: 00007f9153e11fe6 R14: 0000001400000001 R15: 00007ffdf0c12528 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mxl111sf_ep4_streaming_ctrl+0x2c/0x1a0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:399 Code: 1e fa 55 41 57 41 56 53 89 f3 49 89 fe 49 bf 00 00 00 00 00 fc ff df e8 02 5e 93 f9 49 81 c6 08 03 00 00 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 25 61 03 fa 4d 8b 36 49 83 c6 38 RSP: 0018:ffffc90002fc7b38 EFLAGS: 00010202 RAX: 0000000000000061 RBX: 0000000000000001 RCX: ffff88807ceb8000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90002fc7c38 R08: ffffc90002fc7647 R09: 1ffff920005f8ec8 R10: dffffc0000000000 R11: ffffffff88348d10 R12: dffffc0000000000 R13: ffff88805a6753b8 R14: 0000000000000308 R15: dffffc0000000000 FS: 00007f91525696c0(0000) GS:ffff888124cc8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000564103601950 CR3: 000000002f2ca000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: fa cli 1: 55 push %rbp 2: 41 57 push %r15 4: 41 56 push %r14 6: 53 push %rbx 7: 89 f3 mov %esi,%ebx 9: 49 89 fe mov %rdi,%r14 c: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 13: fc ff df 16: e8 02 5e 93 f9 call 0xf9935e1d 1b: 49 81 c6 08 03 00 00 add $0x308,%r14 22: 4c 89 f0 mov %r14,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 f7 mov %r14,%rdi 33: e8 25 61 03 fa call 0xfa03615d 38: 4d 8b 36 mov (%r14),%r14 3b: 49 83 c6 38 add $0x38,%r14 --- 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