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:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=sr0wBaNKXWCurFs3juz+OLUfyJau7b0GUHJIh9y66js=; b=FjH+w2RW03mX39qCvoSZFJwVhR3ozgcCTkxZTfqBGtlUvRujxEzXGw9xcP6y8B5mGI yXMx61+5zeyEbtAUgRPjisRDiJwAC6pONEeZmXZ6zgWq1FOvP1ac+7aZYwYhWbeLgDHb quHRNvFkTY1dTkQJ+mfZPPgh0D0cXYnGm70jLCX1CbG8ipRx4II4UJojP+qBUKwjbUb9 GzgTN49K0ivs5mWBWeTa4Y+XXztgJVIubvQlzMGTc0/8Ce46KEjkTnYsufAfWFwWrBWk 5XpTfqACmoLnpr6SWHekwaiMVVx6KDeteApEED7JFEzzuV65fwJnEgVftRz4d3ytFV+7 HwQg== X-Gm-Message-State: AFuF++nmBwFiTzN0P6YuNAMtmIu6geoRKzJ8ycogJv9mSMGhO87m9nAv Xe3IUOMHGfxmlGOlh2rFmEy0LgiQe+nexi5FSyyG3K9LXUaZK9BnI1oL+Z4ErAXlLJq7/L9QSTK CSs9Y/Kcv2iQgG7DxfMiEGyy2oD/NsQvfV92QO62UrBrlEjnQoSLwtBKNEdp5uw== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:c8e:b0:6b1:a812:9871 with SMTP id 006d021491bc7-6ca9a5471b7mr2960164eaf.18.1789750650881; Fri, 18 Sep 2026 09:57:30 -0700 (PDT) Date: Fri, 18 Sep 2026 09:57:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6aad6d7a.0c43d342.320d00.0000.GAE@google.com> Subject: [syzbot] [media?] [usb?] WARNING in ttusb_start_feed/usb_submit_urb 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: 50d05c7c76c9 Merge tag 'landlock-7.3-rc3' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11c1e7f9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5e4e3a0e188a497e dashboard link: https://syzkaller.appspot.com/bug?extid=3caf6a60e5f9be12de08 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 userspace arch: i386 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c1e7f9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17c1e7f9580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/daf497619736/disk-50d05c7c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/748fbd82f647/vmlinux-50d05c7c.xz kernel image: https://storage.googleapis.com/syzbot-assets/e61c59099d07/bzImage-50d05c7c.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3caf6a60e5f9be12de08@syzkaller.appspotmail.com usb 1-1: BOGUS urb xfer, pipe 0 != type 1 ------------[ cut here ]------------ usb 1-1: BOGUS urb flags, 202 --> 200 WARNING: drivers/usb/core/urb.c:533 at usb_submit_urb+0xc9d/0x18b0 drivers/usb/core/urb.c:532, CPU#1: syz.0.17/5856 Modules linked in: CPU: 1 UID: 0 PID: 5856 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:usb_submit_urb+0xd28/0x18b0 drivers/usb/core/urb.c:532 Code: e8 7d 79 c9 fa 4c 89 f7 4d 8b 6d 00 41 0f b6 04 2c 84 c0 48 8b 54 24 18 0f 85 97 07 00 00 8b 0a 48 8b 34 24 4c 89 ea 45 89 f8 <67> 48 0f b9 3a 4c 8b 6c 24 08 4c 89 ef 48 c7 c6 80 2b b0 8f e8 9f RSP: 0018:ffffc90003447918 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888075636400 RCX: 0000000000000202 RDX: ffff88802b2ed020 RSI: ffffffff8cc51f20 RDI: ffffffff9087dfb0 RBP: dffffc0000000000 R08: 0000000000000200 R09: 0000000000000004 R10: 0000000000000003 R11: 0000000000000000 R12: 1ffff1100eac6c8b R13: ffff88802b2ed020 R14: ffff888031879100 R15: 0000000000000200 FS: 0000000000000000(0000) GS:ffff888124dd2000(0063) knlGS:00000000571d4480 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000557bc126bb18 CR3: 000000007579a000 CR4: 00000000003526f0 Call Trace: ttusb_start_iso_xfer drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c:829 [inline] ttusb_start_feed+0xe19/0x1770 drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c:899 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 __do_compat_sys_ioctl fs/ioctl.c:695 [inline] __se_compat_sys_ioctl fs/ioctl.c:638 [inline] __ia32_compat_sys_ioctl+0x5ea/0x950 fs/ioctl.c:638 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline] __do_fast_syscall_32+0x27a/0x6a0 arch/x86/entry/syscall_32.c:291 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:316 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf707f0ec Code: 90 85 d2 74 0a 89 ce 81 e6 ff 0f 00 00 89 32 85 c0 74 05 c1 e9 0c 89 08 31 c0 5e 5d c3 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 58 b8 RSP: 002b:00000000fffcedac EFLAGS: 00000206 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000040146f2c RDX: 0000000080000300 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: e8 7d 79 c9 fa call 0xfac97982 5: 4c 89 f7 mov %r14,%rdi 8: 4d 8b 6d 00 mov 0x0(%r13),%r13 c: 41 0f b6 04 2c movzbl (%r12,%rbp,1),%eax 11: 84 c0 test %al,%al 13: 48 8b 54 24 18 mov 0x18(%rsp),%rdx 18: 0f 85 97 07 00 00 jne 0x7b5 1e: 8b 0a mov (%rdx),%ecx 20: 48 8b 34 24 mov (%rsp),%rsi 24: 4c 89 ea mov %r13,%rdx 27: 45 89 f8 mov %r15d,%r8d * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 4c 8b 6c 24 08 mov 0x8(%rsp),%r13 34: 4c 89 ef mov %r13,%rdi 37: 48 c7 c6 80 2b b0 8f mov $0xffffffff8fb02b80,%rsi 3e: e8 .byte 0xe8 3f: 9f lahf --- 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