syzbot


WARNING in usb_free_urb

Status: upstream: reported C repro on 2024/06/02 01:44
Subsystems: usb media
[Documentation on labels]
Reported-by: syzbot+b466336413a1fba398a5@syzkaller.appspotmail.com
First crash: 439d, last: 1h50m
Cause bisection: the cause commit could be any of (bisect log):
  51474ab44abf drm/bridge: aux-hpd-bridge: correct devm_drm_dp_hpd_bridge_add() stub
  89601f675b00 Merge tag 'usb-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
  
Discussions (14)
Title Replies (including bot) Last reply
[syzbot] Monthly usb report (Jul 2025) 0 (1) 2025/07/24 09:33
[syzbot] Monthly media report (Jun 2025) 0 (1) 2025/06/24 13:52
[PATCH] media: usb: siano: do not free urb-specific transfer buffer 2 (2) 2025/06/09 10:37
[syzbot] Monthly usb report (May 2025) 0 (1) 2025/05/22 12:58
[syzbot] Monthly usb report (Apr 2025) 0 (1) 2025/04/22 10:11
[syzbot] Monthly media report (Mar 2025) 0 (1) 2025/03/23 02:21
[syzbot] Monthly media report (Feb 2025) 0 (1) 2025/02/19 12:35
[syzbot] Monthly media report (Jan 2025) 0 (1) 2025/01/20 08:15
[syzbot] Monthly media report (Dec 2024) 0 (1) 2024/12/19 18:40
[syzbot] Monthly media report (Nov 2024) 0 (1) 2024/11/18 10:47
[syzbot] Monthly media report (Oct 2024) 0 (1) 2024/10/17 07:41
[syzbot] Monthly media report (Sep 2024) 0 (1) 2024/09/16 12:28
[syzbot] Monthly media report (Aug 2024) 0 (1) 2024/08/16 19:57
[syzbot] [media?] [usb?] WARNING in usb_free_urb 1 (3) 2024/06/02 03:45
Last patch testing requests (2)
Created Duration User Patch Repo Result
2024/06/12 01:35 20m retest repro upstream report log
2024/06/02 03:20 23m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master OK log

Sample crash report:
smsusb:siano_media_device_register: media controller created
smsusb:smsusb_start_streaming: smsusb_submit_urb(...) failed
smsusb:smsusb_init_device: smsusb_start_streaming(...) failed
------------[ cut here ]------------
WARNING: CPU: 0 PID: 119 at mm/slub.c:4766 free_large_kmalloc+0x165/0x200 mm/slub.c:4766
Modules linked in:
CPU: 0 UID: 0 PID: 119 Comm: kworker/0:2 Not tainted 6.15.0-rc3-syzkaller-00342-g5bc1018675ec #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:free_large_kmalloc+0x165/0x200 mm/slub.c:4766
Code: 75 08 48 89 df e8 db e9 e2 ff 65 48 8b 05 73 13 5e 10 48 3b 44 24 08 75 53 48 83 c4 10 5b 41 5e 41 5f 5d c3 cc cc cc cc cc 90 <0f> 0b 90 65 48 8b 05 50 13 5e 10 48 3b 44 24 08 75 30 48 89 df 48
RSP: 0018:ffffc90002e06ba8 EFLAGS: 00010206
RAX: 00000000ff000000 RBX: ffffea0001d8b880 RCX: ffffea0000000000
RDX: 0000000000000000 RSI: ffff8880762e2000 RDI: ffffea0001d8b880
RBP: 0000000000000100 R08: ffff88801ef69103 R09: 1ffff11003ded220
R10: dffffc0000000000 R11: ffffed1003ded221 R12: 1ffff11006752082
R13: 0000000000000000 R14: ffff88801ef69160 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055abf8b7cbb8 CR3: 000000001a7a4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 urb_destroy drivers/usb/core/urb.c:25 [inline]
 kref_put include/linux/kref.h:65 [inline]
 usb_free_urb+0xd0/0x120 drivers/usb/core/urb.c:97
 smsusb_term_device+0x1d6/0x3b0 drivers/media/usb/siano/smsusb.c:352
 smsusb_init_device drivers/media/usb/siano/smsusb.c:497 [inline]
 smsusb_probe+0x1a04/0x2060 drivers/media/usb/siano/smsusb.c:575
 usb_probe_interface+0x641/0xbc0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26a/0x9a0 drivers/base/dd.c:657
 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
 driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
 bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:462
 __device_attach+0x2b8/0x400 drivers/base/dd.c:1029
 bus_probe_device+0x185/0x260 drivers/base/bus.c:537
 device_add+0x7b6/0xb50 drivers/base/core.c:3692
 usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c1/0x390 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26a/0x9a0 drivers/base/dd.c:657
 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
 driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
 bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:462
 __device_attach+0x2b8/0x400 drivers/base/dd.c:1029
 bus_probe_device+0x185/0x260 drivers/base/bus.c:537
 device_add+0x7b6/0xb50 drivers/base/core.c:3692
 usb_new_device+0xa39/0x16c0 drivers/usb/core/hub.c:2663
 hub_port_connect drivers/usb/core/hub.c:5531 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
 port_event drivers/usb/core/hub.c:5831 [inline]
 hub_event+0x2941/0x4a00 drivers/usb/core/hub.c:5913
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Crashes (2524):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/04/27 06:56 upstream 5bc1018675ec c6b4fb39 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in usb_free_urb
2024/10/18 06:46 upstream 6efbea77b390 666f77ed .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in usb_free_urb
2025/05/26 12:11 upstream 0ff41df1cb26 874a1386 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in usb_free_urb
2025/02/27 02:21 upstream 5394eea10651 6a8fcbc4 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in usb_free_urb
2024/05/29 01:32 upstream e0cce98fe279 c2e07261 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in usb_free_urb
2025/07/23 16:49 linux-next d086c886ceb9 e1dd4f22 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in usb_free_urb
2025/07/06 01:03 linux-next 26ffb3d6f02c 4f67c4ae .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in usb_free_urb
2025/07/05 23:55 linux-next 26ffb3d6f02c 4f67c4ae .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in usb_free_urb
2025/07/03 07:00 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing cf16f408364e 115ceea7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/07/03 06:20 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing cf16f408364e 115ceea7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/07/03 05:58 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing cf16f408364e 115ceea7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/07/03 05:28 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing cf16f408364e 115ceea7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/07/03 04:51 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing cf16f408364e 115ceea7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/04/23 00:36 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing f41f7b3d9daf 53a8b9bd .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2024/09/06 04:56 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 9c0c11bb87b0 464ac2ed .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/07/14 23:48 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 03fcfc4b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in usb_free_urb
2025/01/01 02:59 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 573067a5a685 d3ccff63 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in usb_free_urb
2025/07/06 01:31 linux-next 26ffb3d6f02c 4f67c4ae .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in usb_free_urb
2025/08/11 15:03 upstream 8f5ae30d69d7 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in usb_free_urb
2025/08/11 13:36 upstream 8f5ae30d69d7 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in usb_free_urb
2025/08/10 19:05 upstream 2b38afce25c4 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in usb_free_urb
2025/08/09 07:18 upstream 37816488247d 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in usb_free_urb
2025/08/08 21:43 upstream 37816488247d 987b750d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in usb_free_urb
2025/08/08 20:28 upstream 37816488247d 987b750d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in usb_free_urb
2025/08/07 08:51 upstream cca7a0aae895 4bd24a3e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in usb_free_urb
2025/08/07 05:35 upstream 479058002c32 4bd24a3e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in usb_free_urb
2025/08/07 02:51 upstream 479058002c32 4bd24a3e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in usb_free_urb
2025/08/07 01:48 upstream 479058002c32 4bd24a3e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in usb_free_urb
2025/08/06 22:02 upstream 479058002c32 4bd24a3e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in usb_free_urb
2025/08/05 11:03 upstream d2eedaa3909b abdcb213 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in usb_free_urb
2025/08/05 10:02 upstream d2eedaa3909b abdcb213 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in usb_free_urb
2025/08/05 07:22 upstream d2eedaa3909b abdcb213 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in usb_free_urb
2025/08/05 04:35 upstream d2eedaa3909b abdcb213 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in usb_free_urb
2025/08/04 20:01 upstream d2eedaa3909b abdcb213 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in usb_free_urb
2025/07/29 12:34 upstream ced1b9e0392d c4a95487 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in usb_free_urb
2025/06/24 04:19 upstream 86731a2a651e 1a7fb460 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in usb_free_urb
2025/08/11 12:06 upstream 8f5ae30d69d7 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in usb_free_urb
2025/07/05 07:45 upstream c435a4f487e8 4f67c4ae .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in usb_free_urb
2025/07/02 10:51 upstream 66701750d556 bc80e4f0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in usb_free_urb
2025/07/29 04:30 upstream ced1b9e0392d c4a95487 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in usb_free_urb
2025/08/11 17:12 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b38afce25c4 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/11 10:48 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b38afce25c4 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/11 04:20 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b38afce25c4 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/10 18:02 linux-next b1549501188c 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in usb_free_urb
2025/08/10 15:55 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 2b38afce25c4 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/10 13:03 linux-next b1549501188c 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in usb_free_urb
2025/08/10 10:50 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing c30a13538d9f 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/10 06:34 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing c30a13538d9f 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/10 04:26 linux-next b1549501188c 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in usb_free_urb
2025/08/10 01:40 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing c30a13538d9f 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/09 16:50 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing c30a13538d9f 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/09 10:25 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing d632ab86aff2 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/09 05:55 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing d632ab86aff2 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/09 03:27 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing d632ab86aff2 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/08 09:54 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing d632ab86aff2 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/08 06:46 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing d632ab86aff2 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/07 22:06 linux-next 442d93313cae 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in usb_free_urb
2025/08/07 16:23 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing d632ab86aff2 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/07 12:31 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing d632ab86aff2 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/07 07:02 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing d632ab86aff2 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/07 01:02 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing d632ab86aff2 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/06 12:06 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing d632ab86aff2 ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/06 04:51 linux-next afec768a6a8f 904e669c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in usb_free_urb
2025/08/05 21:33 linux-next afec768a6a8f 904e669c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in usb_free_urb
2025/08/05 18:34 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing d632ab86aff2 37880f40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/05 03:19 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing d632ab86aff2 f5bcc8dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/04 23:57 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing d632ab86aff2 f5bcc8dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/04 20:15 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing d632ab86aff2 f5bcc8dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/04 16:14 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 51d4b0a44c82 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/04 10:56 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 51d4b0a44c82 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/04 08:46 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 51d4b0a44c82 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
2025/08/04 04:20 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 51d4b0a44c82 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in usb_free_urb
* Struck through repros no longer work on HEAD.