general protection fault in usb_driver_release_interface

Status: upstream: reported C repro on 2026/10/10 14:43
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+a581b03531e5e2f6c697@syzkaller.appspotmail.com
First crash: 31d, last: 4d08h
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2026/10/11 lts (merge base) 722980f27458 C [report] general protection fault in usb_driver_release_interface
2026/10/11 upstream (ToT) a5ebb76233b7 C [report] general protection fault in usb_driver_release_interface
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: unable to handle kernel paging request in usb_driver_release_interface prio:high usb 8 syz, C 3 7d11h 7d11h 0/29 upstream: reported C repro on 2026/10/07 12:00
android-6-12 general protection fault in usb_driver_release_interface 2 syz 8 3d03h 44d 0/1 premoderation: reported syz repro on 2026/08/31 22:10
android-5-10 general protection fault in usb_driver_release_interface 2 syz, C 6 8d16h 29d 0/2 upstream: reported C repro on 2026/09/15 19:26

Sample crash report:
general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 0 PID: 6 Comm: kworker/0:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:klist_put lib/klist.c:212 [inline]
RIP: 0010:klist_del lib/klist.c:230 [inline]
RIP: 0010:klist_remove+0x150/0x2f0 lib/klist.c:249
Code: 45 02 49 89 df 49 c1 ef 03 43 80 3c 27 00 74 08 48 89 df e8 12 6d 39 ff 4c 8b 33 49 83 e6 fe 49 8d 7e 20 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 f4 6c 39 ff 49 8b 46 20 48 89 44 24 18 4c
RSP: 0018:ffffc90000067480 EFLAGS: 00010202
RAX: 0000000000000004 RBX: ffff88810b013248 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8699aa80 RDI: 0000000000000020
RBP: ffffc90000067570 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200000ce80 R12: dffffc0000000000
R13: 1ffff9200000ce94 R14: 0000000000000000 R15: 1ffff11021602649
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d38b50000 CR3: 000000010dd08000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __device_release_driver drivers/base/dd.c:1244 [inline]
 device_release_driver_internal+0x683/0x7c0 drivers/base/dd.c:1262
 device_release_driver+0x19/0x20 drivers/base/dd.c:1285
 usb_driver_release_interface+0x140/0x1b0 drivers/usb/core/driver.c:627
 cdc_ncm_unbind+0x2b3/0x440 drivers/net/usb/cdc_ncm.c:1014
 cdc_mbim_unbind+0xec/0x100 drivers/net/usb/cdc_mbim.c:206
 usbnet_disconnect+0x1c2/0x3c0 drivers/net/usb/usbnet.c:1662
 usb_unbind_interface+0x212/0x8a0 drivers/usb/core/driver.c:458
 __device_release_driver drivers/base/dd.c:1229 [inline]
 device_release_driver_internal+0x536/0x7c0 drivers/base/dd.c:1262
 device_release_driver+0x19/0x20 drivers/base/dd.c:1285
 bus_remove_device+0x2df/0x340 drivers/base/bus.c:531
 device_del+0x62e/0xe20 drivers/base/core.c:3610
 usb_disable_device+0x3a8/0x750 drivers/usb/core/message.c:1472
 usb_disconnect+0x32d/0x870 drivers/usb/core/hub.c:2293
 hub_port_connect drivers/usb/core/hub.c:5399 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5700 [inline]
 port_event drivers/usb/core/hub.c:5866 [inline]
 hub_event+0x19b0/0x43f0 drivers/usb/core/hub.c:5948
 process_one_work+0x6c8/0xbb0 kernel/workqueue.c:2328
 worker_thread+0xaa0/0x1250 kernel/workqueue.c:2475
 kthread+0x3f5/0x4f0 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Modules linked in:
---[ end trace 710ce6f885d9f145 ]---
RIP: 0010:klist_put lib/klist.c:212 [inline]
RIP: 0010:klist_del lib/klist.c:230 [inline]
RIP: 0010:klist_remove+0x150/0x2f0 lib/klist.c:249
Code: 45 02 49 89 df 49 c1 ef 03 43 80 3c 27 00 74 08 48 89 df e8 12 6d 39 ff 4c 8b 33 49 83 e6 fe 49 8d 7e 20 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 f4 6c 39 ff 49 8b 46 20 48 89 44 24 18 4c
RSP: 0018:ffffc90000067480 EFLAGS: 00010202
RAX: 0000000000000004 RBX: ffff88810b013248 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8699aa80 RDI: 0000000000000020
RBP: ffffc90000067570 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200000ce80 R12: dffffc0000000000
R13: 1ffff9200000ce94 R14: 0000000000000000 R15: 1ffff11021602649
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4324ef9ff8 CR3: 000000010dd08000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	45 02 49 89          	add    -0x77(%r9),%r9b
   4:	df 49 c1             	fisttps -0x3f(%rcx)
   7:	ef                   	out    %eax,(%dx)
   8:	03 43 80             	add    -0x80(%rbx),%eax
   b:	3c 27                	cmp    $0x27,%al
   d:	00 74 08 48          	add    %dh,0x48(%rax,%rcx,1)
  11:	89 df                	mov    %ebx,%edi
  13:	e8 12 6d 39 ff       	call   0xff396d2a
  18:	4c 8b 33             	mov    (%rbx),%r14
  1b:	49 83 e6 fe          	and    $0xfffffffffffffffe,%r14
  1f:	49 8d 7e 20          	lea    0x20(%r14),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 05                	je     0x36
  31:	e8 f4 6c 39 ff       	call   0xff396d2a
  36:	49 8b 46 20          	mov    0x20(%r14),%rax
  3a:	48 89 44 24 18       	mov    %rax,0x18(%rsp)
  3f:	4c                   	rex.WR

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/10 14:32 android13-5.15-lts d6c8aee048e0 4f92358f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in usb_driver_release_interface
2026/09/13 11:54 android13-5.15-lts 5bfe2b8c1439 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in usb_driver_release_interface
* Struck through repros no longer work on HEAD.