WARNING in dib0700_i2c_xfer/usb_submit_urb

Status: upstream: reported C repro on 2025/03/24 18:18
Subsystems: usb
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+c38e5e60d0041a99dbf5@syzkaller.appspotmail.com
First crash: 497d, last: 20h45m
Cause bisection: failed (error log, bisect log)
  
✨ AI Jobs (2)
ID Workflow Result Correct Bug Created Started Finished Revision Error
e70d157e patching 💥 WARNING in dib0700_i2c_xfer/usb_submit_urb 2026/07/20 10:10 2026/07/20 10:10 2026/07/20 10:33 de6a700d
reproducer did not crash
9555fa38 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ WARNING in dib0700_i2c_xfer/usb_submit_urb 2026/05/16 21:35 2026/05/16 21:35 2026/05/16 22:23 de5aae85

			
		
Discussions (6)
Title Replies (including bot) Last reply
[PATCH v3] media: dvb-usb-v2: disallow 0-length I2C reads 3 (3) 2025/06/09 10:38
[PATCH v2] media: dvb-usb-v2: disallow 0-length I2C reads 3 (3) 2025/05/21 10:22
[PATCH] media: dvb-usb-v2: disallow 0-length I2C reads 1 (1) 2025/05/20 11:35
[syzbot] [usb?] WARNING in gl861_ctrl_msg/usb_submit_urb 2 (4) 2025/05/19 20:17
[PATCH] media: dvb: usb: Fix WARNING in dib0700_i2c_xfer/usb_submit_urb 13 (13) 2025/03/29 14:31
[syzbot] [usb?] WARNING in dib0700_i2c_xfer/usb_submit_urb 5 (7) 2025/03/25 19:07
Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in dib0700_i2c_xfer/usb_submit_urb origin:upstream -1 syz, C done 3 408d 414d 3/3 fixed on 2025/07/21 10:23
linux-6.1 WARNING in dib0700_i2c_xfer/usb_submit_urb (2) origin:upstream -1 syz, C error 29 23d 319d 0/3 upstream: reported C repro on 2025/09/13 22:56
linux-5.15 WARNING in dib0700_i2c_xfer/usb_submit_urb origin:upstream -1 syz, C error 27 12d 357d 0/3 upstream: reported C repro on 2025/08/06 23:36
linux-6.6 WARNING in dib0700_i2c_xfer/usb_submit_urb origin:upstream -1 syz, C inconclusive 25 45d 269d 0/2 upstream: reported C repro on 2025/11/03 10:21
Last patch testing requests (5)
Created Duration User Patch Repo Result
2025/04/04 18:32 23m retest repro upstream report log
2025/04/04 18:32 40m retest repro upstream report log
2025/04/04 18:32 22m retest repro upstream report log
2025/04/04 18:32 19m retest repro upstream report log
2025/03/25 17:47 1h19m stern@rowland.harvard.edu patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 5fc319360819 OK log

Sample crash report:
------------[ cut here ]------------
usb 1-1: BOGUS control dir, pipe 80000280 doesn't match bRequestType c0
WARNING: drivers/usb/core/urb.c:413 at usb_submit_urb+0x1057/0x18b0 drivers/usb/core/urb.c:411, CPU#0: syz.0.17/5823
Modules linked in:
CPU: 0 UID: 0 PID: 5823 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:usb_submit_urb+0x1100/0x18b0 drivers/usb/core/urb.c:411
Code: b8 00 00 00 00 00 fc ff df 41 0f b6 04 04 84 c0 0f 85 b2 05 00 00 45 0f b6 45 00 48 8b 3c 24 48 8b 74 24 18 4c 89 f2 44 89 f9 <67> 48 0f b9 3a 48 bd 00 00 00 00 00 fc ff df e9 ba f2 ff ff 44 89
RSP: 0018:ffffc9000386f958 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888075a7ce00 RCX: 0000000080000280
RDX: ffff88807bcc9320 RSI: ffffffff8ca31cc0 RDI: ffffffff90658280
RBP: dffffc0000000000 R08: 00000000000000c0 R09: 0000000000000000
R10: ffffc9000386fa40 R11: fffff5200070df54 R12: 1ffff1100564e560
R13: ffff88802b272b00 R14: ffff88807bcc9320 R15: 0000000080000280
FS:  000055557e342500(0000) GS:ffff888124f4e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001480 CR3: 0000000075bd0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 usb_start_wait_urb+0x13f/0x5b0 drivers/usb/core/message.c:62
 usb_internal_control_msg drivers/usb/core/message.c:117 [inline]
 usb_control_msg+0x234/0x3e0 drivers/usb/core/message.c:167
 dib0700_ctrl_rd drivers/media/usb/dvb-usb/dib0700_core.c:95 [inline]
 dib0700_i2c_xfer_legacy drivers/media/usb/dvb-usb/dib0700_core.c:315 [inline]
 dib0700_i2c_xfer+0xbb9/0xf80 drivers/media/usb/dvb-usb/dib0700_core.c:361
 __i2c_transfer+0x7be/0x1fe0 drivers/i2c/i2c-core-base.c:-1
 i2c_transfer+0x1cc/0x2d0 drivers/i2c/i2c-core-base.c:2343
 i2cdev_ioctl_rdwr+0x460/0x740 drivers/i2c/i2c-dev.c:306
 i2cdev_ioctl+0x6a5/0x880 drivers/i2c/i2c-dev.c:467
 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:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fddbbb9de99
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:00007ffd8b7fd5f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fddbbe25fa0 RCX: 00007fddbbb9de99
RDX: 0000200000000200 RSI: 0000000000000707 RDI: 0000000000000004
RBP: 00007fddbbc33eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fddbbe25fac R14: 00007fddbbe25fa0 R15: 00007fddbbe25fa0
 </TASK>
----------------
Code disassembly (best guess):
   0:	b8 00 00 00 00       	mov    $0x0,%eax
   5:	00 fc                	add    %bh,%ah
   7:	ff                   	lcall  (bad)
   8:	df 41 0f             	filds  0xf(%rcx)
   b:	b6 04                	mov    $0x4,%dh
   d:	04 84                	add    $0x84,%al
   f:	c0 0f 85             	rorb   $0x85,(%rdi)
  12:	b2 05                	mov    $0x5,%dl
  14:	00 00                	add    %al,(%rax)
  16:	45 0f b6 45 00       	movzbl 0x0(%r13),%r8d
  1b:	48 8b 3c 24          	mov    (%rsp),%rdi
  1f:	48 8b 74 24 18       	mov    0x18(%rsp),%rsi
  24:	4c 89 f2             	mov    %r14,%rdx
  27:	44 89 f9             	mov    %r15d,%ecx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbp
  36:	fc ff df
  39:	e9 ba f2 ff ff       	jmp    0xfffff2f8
  3e:	44                   	rex.R
  3f:	89                   	.byte 0x89

Crashes (748):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/29 23:12 upstream fc02acf6ac0c cb1587ea .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/07/14 06:54 upstream 0f26556c5eee 2130f682 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/07/14 04:17 upstream 0f26556c5eee 2130f682 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/10 06:07 upstream 685441a6d3f1 34dab4be .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/01/18 03:43 upstream d3eeb99bbc99 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2025/03/21 08:08 upstream 5fc319360819 62330552 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2025/03/21 05:48 upstream 5fc319360819 62330552 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2025/03/21 03:36 upstream 5fc319360819 62330552 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2025/03/21 01:15 upstream 5fc319360819 62330552 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/09 22:30 linux-next e98d21c170b0 29233ece .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/02/02 13:26 linux-next 4c87cdd03284 018ebef2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2025/11/06 19:17 linux-next df5d79720b15 4e1406b4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2025/11/06 18:30 linux-next df5d79720b15 4e1406b4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2025/09/27 15:07 linux-next 262858079afd 001c9061 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2025/09/16 23:58 linux-next 590b221ed425 e2beed91 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2025/08/09 09:37 linux-next b1549501188c 32a0e5ed .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/07/25 12:29 upstream 0ce37745d4bf 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/07/17 08:05 upstream fce2dfa773ce 7f27c57a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/07/16 02:49 upstream 58717b2a1365 27a8bd60 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/07/13 07:36 upstream a13c140cc289 d78ea535 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/07/09 11:25 upstream 0e35b9b6ec0f b9f1ceaa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/07/01 00:10 upstream dc59e4fea9d8 00e8b0fd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/26 18:35 upstream 4edcdefd4083 7ff32d8b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/23 08:21 upstream 502d801f0ab0 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/23 03:58 upstream ef0c9f75a195 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/21 14:39 upstream 390d73adf896 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/17 09:43 upstream 6b5a2b7d9bc1 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/16 16:14 upstream 481329ec5b31 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/13 20:03 upstream 062871f1371b 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/11 07:11 upstream 9716c086c8e8 b754d2d8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/09 15:20 upstream 2d3090a8aeb5 c36c07f6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/08 08:52 upstream 33d8d8ec31b5 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/06 21:17 upstream 8e65320d91cd cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/03 12:13 upstream ba3e43a9e601 234057e5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/02 19:49 upstream 6f3ed7fec72f 62fe1528 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/02 17:46 upstream 6f3ed7fec72f 62fe1528 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/02 07:43 upstream e43ffb69e043 1095583b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/31 18:42 upstream 174914ea5513 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/31 03:02 upstream 174914ea5513 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/30 06:45 upstream 9215e74f228f 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/29 06:41 upstream 8fde5d1d47f6 4624854e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/28 07:16 upstream eb3f4b7426cf 4c36e7e5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/28 03:04 upstream eb3f4b7426cf 4c36e7e5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/24 20:11 upstream 4cbfe4502e3d c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/22 18:04 upstream 45255ea1ca09 e16cf9f3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/22 18:03 upstream 45255ea1ca09 e16cf9f3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/20 01:47 upstream 27fa82620cba 0909d65f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/19 04:44 upstream 4d3a2a466b8d 9f74d399 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/18 20:10 upstream 5200f5f493f7 55156e84 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/16 15:50 upstream 6916d5703ddf a15a64a6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/16 02:29 upstream d458a240344c 81fb92f3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/07/17 01:22 upstream 37e2f878a7a6 8f30cfd7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/21 19:04 upstream 390d73adf896 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/06/04 14:09 upstream ba3e43a9e601 197909be .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/29 15:22 upstream 8fde5d1d47f6 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/29 11:39 upstream 8fde5d1d47f6 4624854e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/27 19:44 upstream eb3f4b7426cf 769cbc61 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/24 17:25 upstream 4cbfe4502e3d c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/23 16:58 upstream 79bd2dded182 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/23 04:29 upstream 45255ea1ca09 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/19 20:38 upstream ab5fce87a778 223544dc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/18 17:25 upstream 5200f5f493f7 55156e84 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/17 18:57 upstream 6916d5703ddf de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/03 16:24 upstream 66edb901bf87 a0d91488 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/07/13 15:55 linux-next bee763d5f341 a870962e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/28 12:32 linux-next e7d700e14934 9a5a7e5e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in dib0700_i2c_xfer/usb_submit_urb
2026/05/18 07:13 linux-next e98d21c170b0 de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in dib0700_i2c_xfer/usb_submit_urb
* Struck through repros no longer work on HEAD.