vhci_hcd: invalid port number 108
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BUG: KASAN: slab-out-of-bounds in vhci_hub_control+0x2b06/0x2c40 drivers/usb/usbip/vhci_hcd.c:441
Read of size 4 at addr ffff8801ce3bb6bc by task syz-executor1/13780

CPU: 1 PID: 13780 Comm: syz-executor1 Not tainted 4.19.0-rc5+ #37
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113
 print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432
 vhci_hub_control+0x2b06/0x2c40 drivers/usb/usbip/vhci_hcd.c:441
 rh_call_control drivers/usb/core/hcd.c:679 [inline]
 rh_urb_enqueue drivers/usb/core/hcd.c:838 [inline]
 usb_hcd_submit_urb+0x1973/0x22b0 drivers/usb/core/hcd.c:1651
 usb_submit_urb+0x893/0x1590 drivers/usb/core/urb.c:570
 usb_start_wait_urb+0x13d/0x5a0 drivers/usb/core/message.c:57
 usb_internal_control_msg drivers/usb/core/message.c:101 [inline]
 usb_control_msg+0x332/0x4e0 drivers/usb/core/message.c:152
 proc_control+0x99b/0xef0 drivers/usb/core/devio.c:1106
 usbdev_do_ioctl+0x1eb8/0x3b50 drivers/usb/core/devio.c:2412
 usbdev_ioctl+0x25/0x30 drivers/usb/core/devio.c:2569
 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: 0033:0x457579
Code: 1d 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 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f806ff74c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579
RDX: 0000000020000000 RSI: 00000000c0185500 RDI: 0000000000000003
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f806ff756d4
R13: 00000000004bf6c0 R14: 00000000004cf598 R15: 00000000ffffffff

Allocated by task 13120:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490
 kmem_cache_alloc+0x12e/0x730 mm/slab.c:3554
 getname_flags+0xd0/0x5a0 fs/namei.c:140
 user_path_at_empty+0x2d/0x50 fs/namei.c:2608
kobject: 'loop4' (000000002921dc23): kobject_uevent_env
 user_path_at include/linux/namei.h:57 [inline]
 vfs_statx+0x129/0x210 fs/stat.c:185
 vfs_stat include/linux/fs.h:3124 [inline]
 __do_sys_newstat+0x8f/0x110 fs/stat.c:337
 __se_sys_newstat fs/stat.c:333 [inline]
 __x64_sys_newstat+0x54/0x80 fs/stat.c:333
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 13120:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
kobject: 'loop4' (000000002921dc23): fill_kobj_path: path = '/devices/virtual/block/loop4'
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3498 [inline]
 kmem_cache_free+0x83/0x290 mm/slab.c:3756
 putname+0xf2/0x130 fs/namei.c:261
 filename_lookup+0x39a/0x520 fs/namei.c:2357
 user_path_at_empty+0x40/0x50 fs/namei.c:2608
 user_path_at include/linux/namei.h:57 [inline]
 vfs_statx+0x129/0x210 fs/stat.c:185
 vfs_stat include/linux/fs.h:3124 [inline]
 __do_sys_newstat+0x8f/0x110 fs/stat.c:337
 __se_sys_newstat fs/stat.c:333 [inline]
 __x64_sys_newstat+0x54/0x80 fs/stat.c:333
kobject: 'loop5' (00000000c3528f43): kobject_uevent_env
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8801ce3ba1c0
 which belongs to the cache names_cache of size 4096
The buggy address is located 1276 bytes to the right of
 4096-byte region [ffff8801ce3ba1c0, ffff8801ce3bb1c0)
The buggy address belongs to the page:
page:ffffea000738ee80 count:1 mapcount:0 mapping:ffff8801da978dc0 index:0x0 compound_mapcount: 0
kobject: 'loop5' (00000000c3528f43): fill_kobj_path: path = '/devices/virtual/block/loop5'
flags: 0x2fffc0000008100(slab|head)
raw: 02fffc0000008100 ffffea0007382088 ffffea00062e0708 ffff8801da978dc0
raw: 0000000000000000 ffff8801ce3ba1c0 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
kobject: 'loop3' (00000000e076a464): kobject_uevent_env
 ffff8801ce3bb580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801ce3bb600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8801ce3bb680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                        ^
 ffff8801ce3bb700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801ce3bb780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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