kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 19789 Comm: syz-executor7 Not tainted 4.19.0-rc2+ #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:usb_find_alt_setting+0x38/0x310 drivers/usb/core/usb.c:231
Code: 89 fb 48 83 ec 18 48 89 7d c0 89 55 d4 89 75 d0 e8 ad c2 7e fc 48 8d 7b 04 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 84 02 00 00
kobject: 'loop1' (0000000027bb3461): kobject_uevent_env
RSP: 0018:ffff8801d48f74a0 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90005262000
RDX: 0000000000000000 RSI: ffffffff85000c93 RDI: 0000000000000004
RBP: ffff8801d48f74e0 R08: ffff880191326600 R09: ffffed003a91eeb2
R10: ffffed003a91eeb4 R11: ffff8801d48f75a7 R12: 0000000000000000
R13: ffff8801cddd0240 R14: ffff8801c3b26340 R15: 0000000000000000
FS:  00007fe1a76a9700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'loop1' (0000000027bb3461): fill_kobj_path: path = '/devices/virtual/block/loop1'
CR2: 0000000000706138 CR3: 00000001d5732000 CR4: 00000000001426f0
Call Trace:
 check_ctrlrecip+0x1e6/0x320 drivers/usb/core/devio.c:828
 proc_control+0x151/0xef0 drivers/usb/core/devio.c:1074
 usbdev_do_ioctl+0x1eb8/0x3b50 drivers/usb/core/devio.c:2394
 usbdev_ioctl+0x25/0x30 drivers/usb/core/devio.c:2551
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702
 __do_sys_ioctl fs/ioctl.c:709 [inline]
 __se_sys_ioctl fs/ioctl.c:707 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457099
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe1a76a8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe1a76a96d4 RCX: 0000000000457099
RDX: 0000000020000080 RSI: 00000000c0185500 RDI: 0000000000000003
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004cf7d8 R14: 00000000004c5a5e R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 65287e311abd5259 ]---
RIP: 0010:usb_find_alt_setting+0x38/0x310 drivers/usb/core/usb.c:231
Code: 89 fb 48 83 ec 18 48 89 7d c0 89 55 d4 89 75 d0 e8 ad c2 7e fc 48 8d 7b 04 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 84 02 00 00
RSP: 0018:ffff8801d48f74a0 EFLAGS: 00010247
kobject: 'kvm' (000000007adbc103): kobject_uevent_env
kobject: 'kvm' (000000007adbc103): fill_kobj_path: path = '/devices/virtual/misc/kvm'
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90005262000
RDX: 0000000000000000 RSI: ffffffff85000c93 RDI: 0000000000000004
RBP: ffff8801d48f74e0 R08: ffff880191326600 R09: ffffed003a91eeb2
R10: ffffed003a91eeb4 R11: ffff8801d48f75a7 R12: 0000000000000000
R13: ffff8801cddd0240 R14: ffff8801c3b26340 R15: 0000000000000000
FS:  00007fe1a76a9700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000722a14 CR3: 00000001d5732000 CR4: 00000000001406e0